KOH活化的炭干凝胶及其储氢性能.pdf

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1、第28卷第l2期无机化学学报Vo1．28No．122012年12月CHINESEJOURNALOFINORGANICCHEMISTRY2565—2572KOH活化的炭干凝胶及其储氢性能张静娴易观贵-刘应亮，1昊拥建肖勇1孙立贤。(暨南大学化学系，纳米化学研究所，广州5106321fz中科院大连化学物理研究所，大连1160231摘要：以苯二酚与甲醛为前驱体，赖氨酸作为催化剂，快速合成了有机溶胶。有机溶胶经碳化以及KOH进一步活化，获得了具有较高微孔率和较大比表面积的炭干凝胶。研究了多孔炭干凝胶的储氢性能，比较了不同活化程度的炭千凝胶的最大储氢容量与比表面积、微孔体积以及微孔孔径分布的关系。结果表

2、明，KOH适度活化的炭干凝胶(ACX一5)具有较高的比表面积(2204m·g一-)和较大的总孔容积(1．09cIll3og一)，在77K和1．1MPa氢压下时其储氢量可达4·3wt％。关键词：炭干凝胶；KOH活化；储氢中图分类号：TQ127．1文献标识码：A文章编号：1001_4861(2012)12—2565—08KOH．ActivatedCarbonXerogelsforHydrogenStorageZHANGJing-XianYIGuan．GuiLIUYing．Liang，WUYong—JianXIAO-Y。ngSUNLi-Xian(Dep~rtmeat#ChemistryandInst

3、ituteofNa~OChemistry,JinanUniversity,Guangzho510632，Chi(：DalianInstitMteofChemicalPhysics，ChineseAca&myofScieces，Dalian，Liaoning116023，China)Abstract：Organicxerogelwasrapidlypreparedviaalysine。catalyzedgelationprocesswithresorcln0landf0rmaldehvdeastheprecursors．Aftercarbonizationandasubsequentactiva

4、tionwithKOH，carbonxerogelswithhighmicrop0r0sityandhigh．specific．surfaceareacouldbeobtained．ThehydrogenstorageproperttesoftheDorouscarbonxerogelswerestudied．TherelationshipofthemaximumhydrogenstoragecapacitywthsPecicsu—’aceareamicmporevolumeandporesizedistributionwasinvestigated．Theresultsshowthatmod

5、eratelyKOH_activatedcarb0nxer0ge1(ACX一5)withhighsurfaceareaof2204m·g一andlargetotal。porevolumeof1．09cm3．g-exhibitsthelargesthydrogenstoragecapacityof4．3wt％at77Kandunder1．1MPahydrogenpressure·Keywords：carbonxerogels；KOHactivation；hydrogenstorageHydrogenhasbeenrecognizedasanidealenergyseveralwaystostor

6、ehydrogen，includingliquefaction，compressedgas，metalhydrides，chemicalhydrides，carrierduetoitsabundant，renewable，burningpollution—freeandhigherchemicalenergythanandporousadsorbents．Amongthem，theadsorptionofhydrocarbonfuels[”．However．thestorageandhydrogenonporousmaterialsisaphysicaladsorptiontransporta

7、tionofhydrogeninasafeandeficientwayprocess．whichpossessesanumberofadvantages，isthekeychallengeinlarge—scaleapplicationsofsuchasfastkinetics，weakbondingingas-solidhydrogenenergy．Currently，thereareessen