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Review FunctionalMaterialsLetters Vol.5,No.1(2012)1230001(9pages) ©WorldScientificPublishingCompany DOI:10.1142/S1793604712300010 RECENTPROGRESSINBORON-ANDNITROGEN-BASED CHEMICALHYDROGENSTORAGE ZHANG-HUILUandQIANGXU* NationalInstituteofAdvancedIndustrialScienceandTechnology(AIST) Ikeda,Osaka563-8577,Japan,andGraduateSchoolofEngineering KobeUniversity,NadaKu,Kobe,Hyogo657-8501,Japan *q.xu@aist.go.jp Received27November2011;Accepted25December2011;Published6April2012 Boron-andnitrogen-basedchemicalhydrogenstoragematerials,suchasmetalborohydrides,ammoniaborane,hydrazineborane, metal-nitrogen-hydrogensystems,ammonia,andhydrazine,havebeenextensivelyinvestigatedinthepastyears.Avarietyof methodshavebeendevelopedtodecreasethereactiontemperatureandenhancethereactionkineticsofthesesystems.Thisfeature articleistoserveasanuptodateaccountoftherecentprogressinchemicalhydrogenstoragewiththeboron-andnitrogen-based materials. Keywords:Hydrogenstorage;boron-basedchemicalhydrides;nitrogen-basedchemicalhydrides;dehydrogenation. 1.IntroductionChemicalstoragematerialswithhighhydrogencontents arehighlypromisingashydrogensourcesforfuelcells. Thereisanincreasingandimpendingdemandforsufficient Amongthem,boron-andnitrogen-basedcompounds,suchas energysupplyalongwiththecontinuouslygrowingpopu- metalborohydrides,7ammoniaborane,8hydrazinebor- lationandtherisingstandardsoflivingintheworld. ane,9,10metal-nitrogen-hydrogensystems,11ammonia,12and Hydrogenhasattractedconsiderableattentionasaglobally hydrazine,13,14havebeenextensivelyinvestigatedinthepast acceptedcleanenergycarrier.Theuseofhydrogenfuelcells years.Thisfeaturearticleistoserveasanuptodateaccount inportableelectronicdevicesorvehiclesrequireslightweight oftherecentprogressinchemicalhydrogenstoragewith hydrogenstorageoron-boardhydrogengeneration.Cur- theseboron-andnitrogen-basedcompounds. rently,thesearchofsafeandefficienthydrogenstorage materialsisoneofthemostdifficultchallengesforthe transformationtohydrogen-poweredsocietyasalong-ter