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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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中空树枝状三氧化钨载铂催化剂对甲醇的电催化氧化性能研究
, PP. 251-256
Keywords: 直接甲醇燃料电池,甲醇氧化,三氧化钨,载铂催化剂,电催化
Abstract:
？采用水热法和牺牲模板法相结合制备具有中空树枝结构的三氧化钨载体(d-wo3),在其表面进一步负载活性成分pt,得到纳米pt/d-wo3复合催化剂。采用x射线粉末衍射(xrd)、透射电镜(tem)和比表面积和孔结构分析(bet)等对催化剂的形貌和结构进行了表征。结果表明,三氧化钨具有长6μm和宽2μm的中空树枝状结构,孔径分布主要集中在20~120nm,比表面积为24m2/g,平均粒径为7.2nm的pt纳米粒子均匀分布在其表面。采用循环伏安和计时电流法研究了pt/d-wo3催化剂在酸性溶液中对甲醇的电催化氧化性能。结果表明,pt/d-wo3催化剂比pt/c和pt/wo3催化剂对甲醇有更高的电催化氧化活性和稳定性。d-wo3所具有的中空介孔结构和双功能作用机理有利于甲醇在铂表面的直接脱氢氧化过程。
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