Catalytic activity of [(bpy)2(H2O)Ru-O-Ru(H2O)(bpy)2]4+ for four-electron water oxidation

被引：50

作者：

Nagoshi, K

Yamashita, S

Yagi, M ^{[1
]}

Kaneko, M

机构：

[1] Niigata Univ, Fac Educ, Niigata 9502181, Japan

[2] Ibaraki Univ, Fac Sci, Mito, Ibaraki 3108512, Japan

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1999年 / 144卷 / 01期

关键词：

water oxidation; ruthenium complex; nafion;

D O I：

10.1016/S1381-1169(98)00334-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Water oxidation catalysis by [(bpy)(2)(H2O)Ru-O-Ru(H2O)(bpy)(2)](4+) (Ru-III(OH2)-O-Ru-III(OH2)) complex was studied in a homogeneous aqueous solution (AS) as well. as heterogeneous Nafion membrane (HM) using Ce(IV) oxidant. The initial O-2 evolution rate, V-O2 (mol s(-1)) increased linearly at low complex concentrations under the excess Ce(IV) oxidant, showing that 4-electron water oxidation is catalyzed by one molecule of the complex. The intrinsic catalytic activities, k(O2) (s(-1)), in the AS and HM were 4.2 X 10(-3) s(-1) and 2.4 X 10(-3) s(-1), respectively. These values are much higher than those of well-known metal and metal oxide catalysts. Comparison of catalytic activity for various metal complexes and oxides is presented. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：71 / 76

页数：6

共 17 条

[1] Mechanism of water oxidation catalyzed by the mu-oxo dimer [(bpy)(2)(OH2)Ru(III)ORu(III)(OH2)(bpy)(2)](4+) [J].