共查询到19条相似文献,搜索用时 62 毫秒
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纳米金属催化剂的制备方法包括化学法和物理法。化学法中主要有溶胶-凝胶法、沉淀法、溶剂热合成法、微乳法和水解法等;物理法主要有气相凝聚法、溅射法和机械研磨法等。其中化学法中的溶胶-凝胶法及沉淀法应用最广。对纳米金属催化剂的制备方法进行了比较,并简要论述了制备及应用过程中存在的主要问题。 相似文献
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《高科技纤维与应用》2009,(4)
本发明公开了一种基于纳米碳纤维的贵金属电催化剂及其制备方法。本发明基于纳米碳纤维的独特物理化学性能,利用电化学沉积和化学沉积方法的优点,摒弃电化学沉积和化学沉积方法 相似文献
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综述了聚苯撑吡啶并咪唑纤维(PIPD纤维)的制备、结构及其相关性能.研究进展表明,PIPD纤维是20世纪末开发出的一种新型芳香族杂环刚棒聚合物纤维,由于具有特殊的双向氢键网状结构而具有优异的力学性能,尤其是压缩性能明显高于其他同类聚苯并咪唑类高性能纤维,并且耐燃耐热性能和界面粘结性也非常突出,在军事、体育、消防、航空航天等领域将具有广阔的应用前景. 相似文献
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Lifeng Wang Nicholas R. Stuckert Ralph T. Yang 《American Institute of Chemical Engineers》2011,57(10):2902-2908
Graphene showed an unusually high hydrogen storage capacity as well as a unique, slow hydrogen adsorption process compared with a variety of carbon materials (carbon nanotubes, activated carbons, mesoporous carbons, templated carbons, and metal organic frameworks). Catalytic dissociation of hydrogen on graphene is observed for the first time. The hydrogen dissociation rate on graphene is also significantly faster than the adsorption rate. This leads to the conclusion that the most active sites on graphene for hydrogen dissociation are not the only sites where the enhanced adsorption occurs. The mechanistic differences in adsorption on graphene when compared with the other carbons are further demonstrated by differences in temperature‐programed desorption results and heats of adsorption. © 2010 American Institute of Chemical Engineers AIChE J, 2011 相似文献
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