Barcelona staff give players guard of honour

first_imgAfter Real Madrid’s refusal to give Barcelona the traditional guard of honour in respect for their recent La Liga title victory, the technical staff at the club rose to the occasion and applauded the players as they entered the pitch at the Nou CampPrior to Sunday’s “El Clasico”, Zinedine Zidane had announced that Real would not be giving their arch-rivals the guard of honour, after sealing the league title last weekend, due to the fact that Barcelona had failed to do the gesture themselves when the sides met at the Santiago Bernabeu in December after his side had won the FIFA Club World Cup.Despite the protests of both Barcelona and the Spanish press, Real remained firm on their decision and carried on with their pre-match preparations as normal.In light of this, Gerard Pique asked the technical staff to do the honour in Real’s place and so they applauded the team as they entered their home ground for the first time in front of their fans as Copa del Rey and La Liga champions.The coaching staff perform a guard of honor for the team ???? ???? Força Barça! pic.twitter.com/ypHdltokGaSergio Ramos, Real MadridZidane reveals Sergio Ramos injury concern for Real Madrid Andrew Smyth – September 14, 2019 Zinedine Zidane has put Sergio Ramos’ availability for Real Madrid’s trip to Sevilla next weekend in doubt after withdrawing him against Levante.— FC Barcelona ???? (@FCBarcelona) May 6, 2018“As they didn’t want to give us a guard of honour, I ask our staff to do it and we’ll do it like that,” said Pique, as reported on Sport.The match between the two La Liga giants ended 2-2.last_img read more

Guardiola doesnt expect a more mature Benjamin Mendy

first_imgDuring a press conference this Tuesday, Pep Guardiola revealed that he doesn’t expect a more mature version of left-back Benjamin Mendy.In football there are players like Benjamin Mendy, who are different from the rest, they have a more jovial demeanor as they can’t seem to have an off switch and manager Pep Guardiola knew this when he first signed the Frenchman from AS Monaco.Ever since he got to Manchester City, this player has always shown a predilection for the more active way of life, the one that isn’t necessarily as private as perhaps the manager would like.Pep Guardiola has learned to separate the player from the public persona with Mandy and other players, but the Frenchman is the one who has given him a more challenging relationship.From the very start at Manchester City, Pep Guardiola repeatedly stated that he never really appreciated the social media life that his defender led, Mendy vowed to slow it down a bit but he never really did it.Now after a couple of years have passed, it appears that the Catalan manager has finally given up on his pursue to stop Mendy from being so public with his life and he has finally accepted the Frenchman for who he is.🗣 | Pep Guardiola: “Benjamin Mendy is in the squad tomorrow (against Burton). Maybe on the bench.”#FPL #FantasyPL #FFScout #GW24 #mcfc pic.twitter.com/6y3xXxq5NU— Fantasy Football Scout (@FFScout) January 22, 2019On Tuesday, when asked about this public persona that Benjamin Mendy has on all his social media accounts, Guardiola explained why he doesn’t have a problem with it anymore.The Catalan manager will be happy as long as the payer responds on training and on the pitch, he doesn’t care about the stuff outside work anymore.“I am delighted with Benjamin,” Guardiola told a news conference via Four Four Two.“I am sad because we were not able to play him because of injuries but that sometimes happens.”“The way he is training, the way he is in the locker room… you cannot imagine how much the people love him. I am delighted – I just want to use him more! That’s all.”“I am not unhappy with Mendy [using social media heavily]. I am not here to change his mentality. His way, the way he lives… is what it is. When we bought him, we knew it.”Harry Maguire, Manchester UnitedSolskjaer praises Harry Maguire after Man United’s 1-0 win Andrew Smyth – September 14, 2019 Ole Gunnar Solskjaer singled out Harry Maguire for praise after helping Manchester United keep a clean sheet in their 1-0 win over Leicester City.“So, when we are talking about training sessions, always it’s perfect but he is active on social media. He likes to be. It is what it is.”“We try to convince him, but I’m not his father! [I tell him]: ‘Be focused on your job and what we have to do. You are young, and you can be one of the best left-backs, but it’s up to you,’” he added.Pep Guardiola: Benjamin Mendy ‘needs to be focused’ to achieve potential https://t.co/OYoao9X0Z6 pic.twitter.com/SsCpZHlnCg— Prem Brew (@prembrew) January 23, 2019After hearing Pep Guardiola speak frankly about Benjamin Mendy’s lifestyle, thinking about the poor way in which Jose Mourinho managed this with Paul Pogba at Manchester United is inevitable.The Portuguese manager truly hated this side of the French midfielder, they were always at odds for several reasons but one of the biggest disagreements they had was due to an Instagram story that Pogba posted after Manchester United was eliminated from the FC Cup by Derby County.We could see Paul laughing on a short video right after the Red Devils were eliminated in penalties, this was the origin of the already famous argument between the two of them on next morning’s training session after the infamous defeat.Pep Guardiola takes a very different approach to this with Benjamin Mendy, he prefers to understand his players instead of trying to limit him and this has brought a very peaceful relationship between the two.Even if Pep Guardiola doesn’ like the whole circus that is the social media lifestyle, he understands that times have changed and everybody has to adapt to the new era.‘I’m not his dad’ – Guardiola won’t change much-loved Mendy https://t.co/3P2ThhhBvl pic.twitter.com/KZXk9nDGia— Cleansheet (@Cleansheet) January 22, 2019What’s your take on players who love using social media for everything? Please share your opinion in the comment section down below.last_img read more

Eastlake Middle School sets up outdoor grill to solve long lunch line

first_img Categories: Good Morning San Diego, Local San Diego News FacebookTwitter 00:00 00:00 spaceplay / pause qunload | stop ffullscreenshift + ←→slower / faster ↑↓volume mmute ←→seek  . seek to previous 12… 6 seek to 10%, 20% … 60% XColor SettingsAaAaAaAaTextBackgroundOpacity SettingsTextOpaqueSemi-TransparentBackgroundSemi-TransparentOpaqueTransparentFont SettingsSize||TypeSerif MonospaceSerifSans Serif MonospaceSans SerifCasualCursiveSmallCapsResetSave Settings Elizabeth Alvarez Elizabeth Alvarez, Eastlake Middle School sets up outdoor grill to solve long lunch line problemcenter_img Posted: February 28, 2018 00:00 00:00 spaceplay / pause qunload | stop ffullscreenshift + ←→slower / faster ↑↓volume mmute ←→seek  . seek to previous 12… 6 seek to 10%, 20% … 60% XColor SettingsAaAaAaAaTextBackgroundOpacity SettingsTextOpaqueSemi-TransparentBackgroundSemi-TransparentOpaqueTransparentFont SettingsSize||TypeSerif MonospaceSerifSans Serif MonospaceSans SerifCasualCursiveSmallCapsResetSave Settings February 28, 2018last_img read more

Douglas Publications Sues Distributor

first_imgNewsletter and trade magazine publisher Douglas Publications is suing distributor Baker & Taylor over magazines and directories the publisher says the company distributed on a credit basis but allegedly never paid for.The suit was filed late last year in North Carolina’s Mecklenburg County Superior Court. According to the complaint, Douglas Publications is seeking $53,541.20 in outstanding “goods and services.” The publications in question include Douglas’ Salesman’s Guide directories and Facility Care magazine.“We have attempted over the last several years to obtain payments but were unsuccessful,” Douglas Publications president Alan Douglas wrote in an e-mail to FOLIO:. “Baker & Taylor did not pay us and Castle Harlan Partners [a private equity group with controlling interest in Baker & Taylor] refused to respond. Silence isn’t always golden when vendor disputes drag on for years.” Baker & Taylor did not return a FOLIO: request for comment.In addition to Facility Care, Douglas publishes American Painting Contractor and Workplace HR & Safety magazines. Earlier this year Baker & Taylor—a global distributor of books, magazines, videos and music to libraries and retailers—announced that its chairman and CEO, Richard Willis, resigned in order to spend more time with his family. He was replaced as chairman by Baker & Taylor board member Jack Eugster.last_img read more

Wilmington Youth Soccers Latest InTown Game Summaries

first_imgWILMINGTON, MA — Below are Wilmington Youth Soccer in-town game summaries from Saturday, May 12, 2018.Boys Grade 2 Games:Columbus Crew vs. New York Red Bulls:The Columbus Crew would not back down from this back and forth match. The offensive pressure from Griffin Crowe, Matthew Lawler, Sanjeev Puvanendrakumar and Nathan DiSchino brought the crowd to a frenzy. A spectacular display of defensive skills was shown by Jonathan Poulose and Tristan DeHart. In addition, the midfield play of Marcus Dawson, Scott Anderson and Bijon Pourshadi kept constant pressure on the opponent’s net. The goalkeeping tandem of Christopher Cali and Brendan Cohen made timely saves, standing strong the entire match.DC United vs. New England Revolution:The air was full of excitement, as the much-anticipated match between DC United and New England Revolution commenced. Fantastic ball skills were displayed by Caden Merritt and Ryan Fitzgerald resulting in goals by Garrett Lanagan, Chase Daly, Jake Gryglik, and Connor Jamieson. The midfield and defensive play of Ryan Hudd, David Poulose, Ryan Fitzgerald, Jacob McGahey and Jacob Afthim kept DC United in excellent shape. The crowd roared to their feet when Caden Merritt, Chase Daly, Jacob Afthim and Ryan Fitzgerald made some spectacular saves.Girls Grade 2 Games:Chicago Red Stars v. Orlando Pride:Proving they were also World Cup Competitors Ava Szczesuil and Georgia Hanson scored for the Orlando Pride in this hard fought game. Anna Ward, Emily Laquidara and Jacqueline Warren added the offensive punch and Courtney Perkins, Julie McMullen and Chloe Stryhalaeck held up the defense. It was an outstanding team effort capped off with great goal keeping by birthday girl Hanna Hadzic and Georgia Hanson.Houston Dash vs. Chicago Red Stars:Top-Notch play kept people watching this one. Excellent offensive plays by Julia Navarro, Molly Kenney and Niamh McNeil applied heavy pressure causing the NC Courage to back pedal. Defensive positioning by Olivia Long and Abigail O’Donoghue fended off any threat that came thru making it tough for the Courage. The goalkeepers also played a great game in net, keeping the game in hand. Boys Grade 1 Games:Philadelphia Union vs. Houston Dynamo:The crowd was kept on the edge of their seats this week as the Philadelphia Union, led by the offensive skills of Michael Belanger and Cameron Jones resulted in scoring opportunities by Davio Dicenso and Sean Marzani. The defense was not to be left out of this one either as Andrew Poyant kept the ball out of their zone for much of the game.Chicago Fire vs. D.C. United:The air was full of excitement, as the much-anticipated match between Chicago Fire and D.C. United commenced. Fantastic ball skill were displayed by Benjamin Card and Matthew Roque resulting in goals by Jacob Schoenholtz, Nathan Ricciarelli and Lucas Pereira.  The midfield and defensive play of all players kept the Chicago Fire in excellent shape. Top-Notch play kept people watching this one.Girls Grade 1 Games:NC Courage vs. Portland Thorns:The NC Courage’s Emily Falk, Allaina Holman and Isabella DeOliveira stayed on their toes creating many scoring opportunities. The play of Olivia Howie, Alaina Roy, Olivia Smith shut down the other end of the field on defense that set the tone for this game.Columbus Crew vs. Houston Dash:Proving they were also World Cup Competitors Kaitlin Pryse, Taylor O’Connell, Emily Ruzzo and Taylor Stone scored for the Houston Dash in this hard-fought game. Grace Daley and Kiera Barry, added the offensive punch and Olivia Marasca and Bridget Bloom held up the defense. It was an outstanding team effort.Boys Kinder Games:Seattle Sounders vs. Philadelphia Union:The Philadelphia Union would not back down from this back and forth match. Goals by Charlie Kennedy (2), Rowan Norton, Brody Aprile, and Declan Riley brought the crowd to a frenzy. A spectacular display of defensive skills was shown by Mikey Doucette and Maxwell Madore. In addition, the midfield play of Connor Mangini and Andrew Power kept constant pressure on the opponent’s net. Girls Kinder Games:Orlando Pride vs. NC CourageThe crowd was kept on the edge of their seats this week as the Orlando Pride, led by the offensive skills of Alaina Wang, Kyla Pereira, Sofia Gomez and Sofia DeLucia resulted in scoring opportunities by Maeve Hennigan, Aubrey Coyne and Adalyn Maloney. The defense was not to be left out of this one either as Abigail Coyne and Olivia Downing kept the ball out of their zone for much of the game.Pre-K Girls Games:Harvard vs. NortheasternThe crowds gathered at the Shawsheen fields for this back and forth game. The Harvard led by Sophia Rocco, Quinn Moulden and Parker Pryse got the crowd jumping out of their seats. Brooke Spirito and Paityn Loughran led the scoring charge, while the great defensive effort of Olivia Contarino and Lily Falk kept the action going.Boston College vs. Boston University:The crowd was kept on the edge of their seats this week as Boston College, led by the offensive skills of Sofia Hunt, Amara Chimwanda  Katie Downing and Grace Connolly resulted in scoring opportunities by McKinleigh Frizol, Lillian Bastien. The defense was not to be left out of this one either as Emily Lane, Emilia Gregorio Ariana LaRosee and Madelyn Peltz kept the ball out of their zone for much of the game.(NOTE: The above game summaries were submitted by Wilmington Youth Soccer.)Like Wilmington Apple on Facebook. Follow Wilmington Apple on Twitter. Follow Wilmington Apple on Instagram. Subscribe to Wilmington Apple’s daily email newsletter HERE. Got a comment, question, photo, press release, or news tip? Email wilmingtonapple@gmail.com.Share this:TwitterFacebookLike this:Like Loading… RelatedWilmington Youth Soccer’s Latest In-Town Game SummariesIn “Sports”Wilmington Youth Soccer’s Latest In-Town Game SummariesIn “Sports”Wilmington Youth Soccer’s Latest In-Town Game Summaries (May 1)In “Sports”last_img read more

MasterCard sued for 19 billion in Britains biggest damages claim

first_imgSome 46 million people in Britain could potentially benefit from a legal case brought against MasterCard demanding 14 billion pounds ($19 billion) in damages for allegedly charging excessive fees, according to court documents filed in London.The case brought by a former chief financial services ombudsman alleges the payments company charged unlawfully high fees to stores when shoppers swiped their debit or credit cards and these were passed on to consumers in higher prices.MasterCard is alleged to have done this for 16 years between 1992 and 2008, in more than 600 pages of documents filed at the Competition Appeal Tribunal on Thursday. “This was almost an invisible tax,” Walter Merricks, who is bringing the case, told the BBC. “MasterCard has behaved disgracefully in this. They have not had the reasonableness to accept that what this was doing was damaging UK consumers.”MasterCard said in a statement it denied any wrongdoing.”We continue to firmly disagree with the basis of this claim and we intend to oppose it vigorously,” the world’s second-largest payments network said.The lawsuit comes after the European Union’s antitrust regulator found in 2014 MasterCard’s fees to store owners to process international payments within the EU were excessive.Law firm Quinn Emanuel said the lawsuit was the largest damages claim in British history and would be brought under a law meaning consumers would automatically be claimants unless they opt out.Any person living in Britain who used a credit card, cash or cheques and was over 16 years old in the period covered by the lawsuit will automatically be part of the claim. If the 14 billion pound claim was shared equally between the number of eligible claimants, each person could receive more than 300 pounds each, according to a Reuters’ calculation.Merricks in a statement said the case is a watershed moment for consumer compensation in Britain. Merricks was head of Britain’s financial services ombudsmen for ten years until 2009, helping to settle disputes between consumers and financial services companies.Britain’s banks have been caught in a range of misspelling cases in the last five years. They have paid 24 billion pounds in compensation for misspelling loan payment insurance, making it Britain’s costliest scandal in financial services.Consumers no longer living in Britain, but who lived in the country between 1992 and 2008, can opt in to the collective claim against MasterCard.Any hearing on the case is not expected until early 2018, unless MasterCard settle it out of court.last_img read more

5 more Chawkbazar fire victims identified CID

first_img.Criminal Investigation Department (CID) identified five more victims of Chawkbazar fire through DNA test on Tuesday, reports UNB.The victims are-Ismail Hossain, 60, Zafar Ahmed, 43, Foysal Sarowar, 53, Mostafa Mia, 39 and RehnumaTabassum Dola, 19.Additional Inspector General of Police Sheikh Himayet Hossain said the CID disclosed the identities of the deceased at a press briefing at its conference room in city’s Malibagh area.However, the identities of two victims of Chawkbazar fire incident could not be known yet as no DNA samples matched with the victims’ sample, he said.On 6 March, eleven more victims of Chawkbazar fire were identified through DNA tests.A deadly fire broke out at a chemical warehouse in Chawkbazar on 20 February. So far, 71 people have died.last_img

Airbnb Agreement With Texas Means Hosts Wont Get Around Paying Tax

first_img 00:00 /01:17 Listen Share X AP Photo/John LocherRandy Tussing, an Airbnb host, looks at his phone while standing in his home, Thursday, Feb. 16, 2017, in Las Vegas.Starting May 1, people who host paying guests through Airbnb in Texas won’t get around paying the 6 percent state hotel occupancy tax.Laura Spanjian, public policy director at Airbnb’s southwest region, said many hosts didn’t know they had to pay those taxes or couldn’t figure out how to.“So we decided, could we actually take on the responsibility of the host and have Airbnb collect and remit the tax?” she said. “So we realized, legally, we could do that if we had agreements with cities and states that in essence transferred responsibility from a host to us.”Texas is not the only place where the company is doing this.By next month, Airbnb will have similar agreements with 250 jurisdictions in the United States, including 20 states.David Stacy has hosted guests through Airbnb for the past two years in his garage apartment north of downtown Houston.He said he has never paid hotel occupancy taxes before, but he’s not concerned that the additional charge will deter potential guests.“I’ve looked at lots of websites for Airbnb in cities that I enjoy traveling to, and I see Airbnb there for a lot less than I would have to pay for a hotel,” he said. “So to me, I think it’s still a good bargain.”Stacy said he wants to abide by the law and is glad Airbnb is stepping in.The city of Houston, by the way, does not yet have an agreement with the company and will still be missing out on a lot of revenue from the local hotel occupancy tax, which is 7 percent.Spanjian said she is in talks with Houston as well. To embed this piece of audio in your site, please use this code:last_img read more

Houston Dreamers Leaders Demand An Extension To DACA

first_img X To embed this piece of audio in your site, please use this code: Ed MayberryProtesters outside the Houston office of Senator John Cornyn of Texas, on this last day for thousands of Deferred Action for Childhood Arrivals or DACA recipients to renew their status.Organizers from United We Dream Houston , which groups young undocumented immigrants, also called dreamers, want an extension to DACA, or the Deferred Action for Childhood Arrivals program, without enforcement add-ons like militarization, mass deportations and the wall.On Thursday, some wore costumes like the Statue of Liberty, and held banners requesting people to honk as they drove by on Memorial Drive.  They demonstrated in front of Senator Cornyn‘s office, but one of the Senator’s representative said they weren’t notified about the rally in advance, and there were no appointments scheduled with them.The Trump administration will stop accepting applications after today for DACA, which protects nearly 700,000 so-called Dreamers from deportation, according to official numbers. Thursday was the deadline for thousands of DACA recipients to renew their status. DACA protections are due to begin expiring in March 2018, unless Congress extends them.The Department of Homeland Security says some 48,000 eligible unauthorized immigrants have yet to renew, and just over 106,000 either have renewal requests currently pending or have had their requests adjudicated. Organizers have no estimates of the number of Texans or Houstonians affected.DACA was started by President Obama in 2012 through an executive action that allows certain undocumented immigrants who were children when they were brought to the U.S. to remain in the country and be eligible for work permits. Share Listen 00:00 /01:02last_img read more

In Wake of Professors Comments Katherine Johnson is Still Celebrated in Physics

first_imgBy Stacy M. Brown, NNPA Newswire Correspondent@StacyBrownMediaFor many, the words of a senior scientist who said physics “was invented and built by men,” stung. The words earlier this month of Professor Alessandro Strumia, who was suspended from working with the European nuclear research center, Cern, served as a reminder of the great accomplishments of Katherine Johnson, who recently turned 100.Celebrate indeed. Strumia also claimed in his controversial comments that physics is “becoming sexist against men.”Katherine Johnson’s work at NASA’s Langley Research Center spanned 1953 to 1986 and included calculating the trajectory of the early space launches. (Photo: NASA Sean Smith / Wikimedia Commons)“Let’s celebrate our sister leader, Katherine Johnson,” NNPA President and CEO Dr. Benjamin F. Chavis, Jr., said this week. “We’re reminded,” Chavis said, “of Johnson, who hand-crunched the numbers for America’s first manned space flight – a feat that finally got its Big Screen acknowledgement just two years ago. Katherine Johnson’s historic contributions to the evolution of applied mathematics and aerospace science epitomizes her genius to overcome the scientific challenges of her generation.”“Today, African American women in particular should be inspired by the example of Katherine Johnson in STEM career fields,” Chavis said. “The NNPA salutes Johnson’s transformative legacy that is no longer hidden.”The recipient of the 2015 National Medal of Freedom who was also recognized by People Magazine in 2016 as one of the 25 Women Changing the World, Johnson enjoyed a brilliant 33-year career at NASA. That portion of her life story was featured on the big screen in “Hidden Figures,” the award-winning movie, starring Taraji P. Henson, Octavia Spencer and Janelle Monáe.In an earlier interview, she told NNPA Newswire that she missed working. “I’d go back now,” she said.After leaving her teaching job in 1953, Johnson began working for NASA, “hand” calculating the trajectories for several space missions, including for the famed space flight of Alan Shephard, the first American in space, and the trajectory for the famed 1968 Apollo 11 flight to the Moon.“I’d do them over if I had to. I’d do anything for anyone,” she said.At an early age, Johnson developed enviable math skills that are recounted on the NASA website in  featured piece titled, “The girl who loved to count.” “I counted everything. I counted the steps to the road, the steps up to church, the number of dishes and silverware I washed … anything that could be counted, I did,” Johnson said.“I entered college, I was 15. I was going to be a math teacher because that was it. You could be a math teacher or a nurse, but I was told I would make a good research mathematician and they had me take all of the courses in the catalogue,” she said.When Astronaut John Glenn went to the moon, Johnson said her “Hidden Figures” crew acted as the computer for the mission. She said calculating everything involved in the flight became like a geometry problem.“I felt most proud of the success of the Apollo mission. We had to determine so much. Where you were, where the moon would be and how fast the astronauts were going,” Johnson said.“We were really concerned but the astronaut had to do it just as we laid it out. I was looking at the television and hoping that we were right,” she said.Born in 1918 in West Virginia, Johnson was a research mathematician, who by her own admission, was simply fascinated by numbers, according to her biography posted by NASA. By the age of 10, Johnson was a high school freshman – an amazing feat in an era when school for African-Americans normally stopped at eighth grade.Her father was determined that Johnson would have a chance to meet her potential. “He drove the family 120 miles to Institute, West Virginia, where I could continue my education through high school,” she said.An achiever at the highest level, Johnson graduated from high school at 14 and from college at 18.By 1953, the growing demands of early space research meant there were openings for African American “computers” (a term that held a different meaning at that time than it does today) at Langley Research Center’s Guidance and Navigation Department – and Johnson found the perfect place to put her extraordinary mathematical skills to work.Glenn requested that she personally recheck the calculations made by the new electronic computers before his flight aboard Friendship 7 – the mission on which he became the first American to orbit the Earth.She continued to work at NASA until 1986.Her calculations proved as critical to the success of the Apollo Moon landing program and the start of the Space Shuttle program as they did to those first steps on the country’s journey into space, according to NASA.Still, Johnson said the book, the Academy Award-nominated movie and her celebrated work with NASA aren’t her greatest accomplishments.“Just staying alive is the greatest accomplishment,” she said.last_img read more

Researchers discover promising hydrogen storage material

first_img Copyright 2011 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. (PhysOrg.com) — If hydrogen is to ever to serve as an onboard energy carrier for the transportation industry, a material will be needed that can store large amounts of hydrogen at ambient temperature and pressure. So far, researchers have not found any material that can meet these requirements. But in a new study, a team from China and the US has taken a significant step toward this goal by identifying a material that can store hydrogen with a density as high as 4.6 wt. % (i.e., the hydrogen accounts for 4.6% of the total weight of the storage material), enabling it to meet the target of 4.3 wt. % set by the US department of Energy for 2010. More information: Kun Lü, et al. “Sc-phthalocyanine sheet: Promising material for hydrogen storage.” Applied Physics Letters 99, 163104 (2011). DOI:10.1063/1.3653465 Explore further Citation: Researchers discover promising hydrogen storage material (2011, November 1) retrieved 18 August 2019 from https://phys.org/news/2011-11-hydrogen-storage-material.html Full to the brim with hydrogen: Porous form of magnesium borohydride can store hydrogen The researchers, led by Qiang Sun from Peking University in Beijing, China, and Virginia Commonwealth University in the Richmond, Virginia, US, have published their study in a recent issue of Applied Physics Letters.“Hydrogen storage is a big challenge for the hydrogen economy,” Sun told PhysOrg.com. “Currently the research is behind schedule, but with the advancement of materials design and synthesis, reaching the target for future transportation applications [is becoming] more and more promising.”As the researchers explained, the greatest difficulty in finding a sufficient hydrogen storage material for onboard storage systems lies in meeting multiple requirements with a single material. For example, in previous studies researchers have found that light metal hydrides can store hydrogen with a gravimetric density of 20 wt. %, but the material is not reversible, meaning it cannot be reused. Also, the hydrogen desorbs only at very high temperatures. In contrast, other materials such as carbon nanotubes and metal or covalent organic frameworks can store hydrogen reversibly, but the hydrogen adsorbs only at very low temperatures. The difference is due to bonding: in light metal hydrides, hydrogen is held in much stronger bonds than in the second group of materials. The researchers explain that, ideally, hydrogen should be bound with an intermediate binding energy.“If the bonding is too strong, hydrogen can only be released at high temperature, while if the bonding is too weak, the storage is unstable at room temperature,” Sun explained. “So we require an intermediate bonding energy.”In the current study, the researchers used modeling and simulations to investigate the performance of hydrogen storage in metal-containing porous sheets, which can be synthesized using the techniques previously proposed by two other groups (M. Abel, et al., and A. Sperl, et al.). In those techniques, porous sheets were made of blue-green dye units called phthalocyanines (Pc) with regularly spaced iron (Fe) atoms or other metal atoms. Due to their high dispersion, these metal sites in the porous substrates provide the possible adsorption sites for hydrogen molecules.“Transition metal atoms easily aggregate to form clusters,” Sun said. But materials in which metal atoms can be prevented from coalescing are scarce.The researchers systematically investigated 10 Pc-based porous sheets with transition metal atoms from scandium (Sc) through zinc (Zn), and found that porous Pc sheets with Sc atoms could store up to 4.6 wt. % hydrogen. In addition to the Sc atoms’ regular distribution in the Pc sheet, Sc has two other attractive features. First, it is lighter than other transition elements, allowing the overall storage material to be relatively light. Second, Sc atoms have a large size, so that they stick out and can capture more hydrogen molecules.By theoretically demonstrating that this Sc-Pc porous sheet can be used to create a hydrogen storage material with attractive properties, the researchers hope that the results will stimulate further analysis and experimental tests of the promising material. At a temperature of 298 K and pressure of 100 bar, the new hydrogen material can store hydrogen at a density of 4.6 wt. %. The inset shows the geometry of a Sc-Pc sheet. Image credit: Kun Lü, et al. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more