Crucial effect of rubidium cation on catalytic activity of a polycrystalline gold electrode toward oxygen reduction reaction in alkaline media

被引：5
作者：
Kajii, Ken [1 ]
Ohsaka, Takeo [1 ]
Kitamura, Fusao [1 ]
机构：
[1] Tokyo Inst Technol, Dept Elect Chem, Interdisciplinary Grad Sch Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 07期
关键词：
Oxygen reduction reaction; Polycrystalline gold electrode; Alkali-metal ions; Rubidium; Hydrodynamic voltammetry; AU(100); ELECTROCATALYSIS; DIOXYGEN; ELECTROREDUCTION; SURFACES; PH;
D O I：
10.1016/j.elecom.2010.04.032
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Catalytic activity of a polycrystalline gold electrode toward oxygen reduction reaction (ORR) in aqueous alkaline media in the presence of various alkali-metal sulfates (M2SO4, M = Li, Na, K, Rb and Cs) was investigated by hydrodynamic voltammetry. The fraction of 4e(-) pathway in low overpotentials (-0.1 to -0.3 V) depended on the alkali-metal cations (Rb >> Na, K, Cs, Li). A complete 4e(-) reduction of O-2 was only attained in the presence of Rb+ cation in the solution, which was comparable or even superior to that reported at the Au(100) single crystal electrode. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：970 / 972
页数：3
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