The rate of anion and hydrogen adsorption on Pt(111) and Rh(111)

被引：34
|
作者：
Langkau, T [1 ]
Baltruschat, H [1 ]
机构：
[1] Univ Bonn, Inst Phys & Theoret Chem, D-53117 Bonn, Germany
来源：
ELECTROCHIMICA ACTA | 1998年 / 44卷 / 6-7期
关键词：
D O I：
10.1016/S0013-4686(98)00194-7
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Impedance spectra were measured for Pt(111) and Rh(111) electrodes in various electrolytes. They can all be interpreted by assuming one or two parallel adsorption resistances in addition to the double layer capacity. Adsorption of Cl- and HSO4- at Pt(111) is very fast and at the limit of detectability. Adsorption of H2PO4- has to be described by two parallel adsorption reactions, one of which is possibly an adsorption connected with deprotonation. Adsorption of hydrogen at Rh(111) is much slower than at Pt(111); surface roughness has opposing effects on both metals and leads to an increased adsorption rate at Rh. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：909 / 918
页数：10
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