Reactivity of monolayers and nano-islands of palladium on Au(1 1 1) with respect to proton reduction
Reactivity of monolayers and nano-islands of palladium on Au(1 1 1) with respect to proton reduction
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DOI：
10.1016/j.electacta.2007.02.043
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发表时间：
2007-05
影响因子：
6.6
通讯作者：
S. Pandelov;U. Stimming
中科院分区：
文献类型：
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作者：
S. Pandelov;U. Stimming
在 0.1M HClO4 溶液中，研究了 Au(111) 上外延生长的 Pd 单层和亚单层与氢还原有关的电化学反应性。析氢速率随着层数的减少而增加，并且亚单层的析氢速率要高得多，即表面上的 Pd 岛越少，催化活性越高。没有发现反应性对 Pd 边缘原子与平台原子之比的明显依赖性。讨论了解释实验结果的可能机制。
Electrochemical reactivity regarding hydrogen reduction was studied at epitaxially grown Pd monolayers and sub-monolayers on Au(111) in 0.1M HClO4solution. The rate of hydrogen evolution increases with decreasing numbers of layers, and it is considerably higher for sub-monolayers, i.e. the fewer Pd islands are on the surface the higher is the catalytic activity. No clear dependence of the reactivity on the ratio of Pd edge atoms to terrace atoms was found. Possible mechanisms explaining the experimental results are discussed.