Catalytic water oxidation using chemically generated Ru(bpy)33+ oxidant

被引：4

作者：

Abe, T ^{[1
]}

Tamada, Y ^{[1
]}

Shiroishi, H ^{[1
]}

Nukaga, M ^{[1
]}

Kaneko, M ^{[1
]}

机构：

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

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1999年 / 144卷 / 03期

关键词：

Ru-red; Ru(bpy)(3)(3+); water oxidation;

D O I：

10.1016/S1381-1169(99)00006-0

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：

Catalytic water oxidation to evolve O-2 was studied using chemically generated Ru(bpy)(3)(3+) (bpy; 2,2'-bipyridine) oxidant, Ru(bpy)(3)(2+) was oxidized to Ru(bpy)(3)(3+) by suspension of PbO2 powders. In the catalytic water oxidation system composed of the Ru(bpy)(3)(3+) and RuO2 adsorbing Ru-red ([(NH3)(5)Ru-O-Ru(NH3)(4)-O-Ru(NH3)(5)]Cl-6), much higher amount of O-2 evolved than in a homogeneous Ru(bpy)(3)(3+)/Ru-red system. This was ascribed to the suppression of the bimolecular decomposition of Ru-red in the RuO2 matrix. The amount of the O-2 evolved increased with the adsorbed amount of the Ru-red into RuO2, wkereas higher amount of the adsorbed Ru-red resulted in the decrease of the O-2 evolution, which was ascribed to bimolecular decomposition of Ru-red in the RuO2 at higher concentrations. The activity of Ru-red in the RuO2 matrix was analyzed considering a static distance distribution between the nearest-neighboring molecules. The decomposition distance (r(d)) was obtained as 1.25 nm showing that contacting Ru-red molecules undergo bimolecular decomposition without catalysis. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：389 / 395

页数：7

共 21 条

[11] Charge transfer from donor to photoexcited Ru(bpy)(3)(2+) in solution and polymer matrix [J].