Multistep one-electron photoelectrocatalytic reduction of oxygen at tris(2,2′-bipyridine)ruthenium(II)-incorporated Nafion®- and clay-coated electrodes in the presence of macrocyclic cobalt(III) complexes

被引:15
作者
Gobi, KV [1 ]
Ramaraj, R [1 ]
机构
[1] Madurai Kamaraj Univ, Sch Chem, Madurai 625021, Tamil Nadu, India
来源
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 449卷 / 1-2期
关键词
Nafion (R); clay; tris(2,2 '-bipyridine)ruthenium(II); macrocyclic cobalt(III) complexes; oxygen reduction; photoelectrocatalysis;
D O I
10.1016/S0022-0728(98)00009-6
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The electrocatalytic reduction of oxygen was carried out at Nafion(R)- and clay-modified electrodes in the presence of tetraazamacrocyclic cobalt(III) complexes. Long-time electrolysis experiments were performed, and the faradaic yield of H2O2 and the rate of H2O2 production were found to be higher at clay-coated electrodes than at Nafion(R)-coated electrodes. In the case of the photoelectrocatalytic reduction of oxygen at Pt/Nafion(R)/[Ru(bpy)(3)](2+) and Pt/H+-montmorillonite/[Ru(bpy)3](2+) electrodes, the amounts of H2O2 produced increased by a factor of two under light irradiation condition when compared to dark. The faradaic yield of H2O2 under irradiation conditions was determined at the modified electrodes, and a mechanism for multistep one-electron photoelectrocatalytic reduction of oxygen was proposed. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:81 / 89
页数:9
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