High catalytic activity of nanostructured Pd thin films electrochemically deposited on polycrystalline Pt and Au substrates towards electro-oxidation of methanol

High catalytic activity of nanostructured Pd thin films electrochemically deposited on polycrystalline Pt and Au substrates towards electro-oxidation of methanol
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电化学沉积在多晶 Pt 和 Au 基底上的纳米结构 Pd 薄膜对甲醇电氧化的高催化活性

DOI:
10.1016/j.elecom.2007.01.038
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发表时间:
2007-06
影响因子:
5.4
通讯作者:
Pan, Wei
Pan, Wei
中科院分区:
工程技术3区
文献类型:
--
作者:
Chen, Shenhao;Ma, Houyi;Huang, Minghu;Zhang, Jintao;Tian, Fang;Pan, Wei

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采用循环电位扫描技术,在无硬模板和软模板的情况下,在多晶Pt和Au衬底上直接制备了纳米结构的Pd薄膜,SEM观察和在H2SO 4溶液中的循环伏安特性证实了这一点.有趣的是,在Pt和Au衬底上沉积Pd/Pd膜后得到的Pd/Pt电极显示出比本体Pt电极高得多的对甲醇电氧化的催化活性。此外,还发现金属基底对Pd膜的电催化性能有很大的影响。
Nanostructured Pd thin films are directly formed on polycrystalline Pt and Au substrates in the absence of hard and soft templates by using a cyclic potential sweep technique, which is confirmed by both SEM observation and their unusual cyclic voltammetric characteristics in H2SO4solution. Interestingly, the bimetallic electrodes obtained after the deposition of ultrathin Pd films onto Pt and Au substrates display much higher catalytic activity towards the electro-oxidation of methanol than the bulk Pt electrode. Besides, it is found that the foreign metal substrate has great influence on the electro-catalytic behavior of the Pd films.
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