Facile preparation and electrochemical behavior of Pt100−xCox(111) single-crystal electrodes in 0.1 M HClO4
Facile preparation and electrochemical behavior of Pt100−xCox(111) single-crystal electrodes in 0.1 M HClO4
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DOI：
10.1016/j.elecom.2011.01.013
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发表时间：
2011-04
影响因子：
5.4
通讯作者：
M. Wakisaka;Yohei Hyuga;Kiyotaka Abe;H. Uchida;Masahiro Watanabe
中科院分区：
文献类型：
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作者：
M. Wakisaka;Yohei Hyuga;Kiyotaka Abe;H. Uchida;Masahiro Watanabe
我们描述了Pt100−xCox（111）合金单晶的制备方法，并初步研究了Pt100−xCox（111）表面在0.1M hclo4溶液中的电化学行为与Co组分的关系。用低能电子衍射和扫描隧道显微镜对制备的Pt-Co（111）表面进行了表征；结果表明，合金表面热形成了铂表皮层。Pt100−xCox（111）电极的循环伏安图显示，由于Pt - Co合金修饰了Pt皮层的电子结构，氢吸附开始电位呈负向移动，表面氧化开始电位呈正向移动，这是Co含量的函数。
We describe the novel and facile preparation of Pt100−xCoxalloy single-crystals and preliminary results on the electrochemical behavior of Pt100−xCox(111) surfaces in 0.1M HClO4solution as a function of Co composition. The prepared Pt-Co(111) surfaces were characterized by low energy electron diffraction and scanning tunneling microscopy; the results suggest the thermal formation of a Pt skin layer on the alloy surface. The cyclic voltammograms of the Pt100−xCox(111) electrodes exhibited increasingly negative shifts of the hydrogen adsorption onset potentials and positive shifts of the surface oxidation onset potentials as a function of the Co content due to the modified electronic structure of the Pt skin layer by the underlying Pt–Co alloy.