Effect of electron availability on selectivity of O2 reduction by synthetic monometallic Fe porphyrins

被引：16

作者：

Collman, JP ^{[1
]}

Shiryaeva, IM ^{[1
]}

Boulatov, R ^{[1
]}

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

来源：

INORGANIC CHEMISTRY | 2003年 / 42卷 / 16期

关键词：

D O I：

10.1021/ic034488r

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Herein we report that biomimetic analogues of cytochrome c oxidase (CcO) couple reduction of O-2 to oxidation of a single-Ru(NH3)(6)(2+) under steady-state catalytic turnover. electron carrier , Higher Ru-II concentrations favor the 4-electron vs 2-electron O-2 reduction pathway. Our data indicate that the capacity of electrode-adsorbed Fe-only porphyrins to catalyze reduction of O-2 to H2O is due to high availability of electrons and is eliminated under the biologically relevant slow electron delivery.

引用

页码：4807 / 4809

页数：3

共 15 条

[1]

Andrieux C. P., 1992, MOL DESIGN ELECTRODE, P207

[2] ELECTROCATALYSIS AT REDOX POLYMER ELECTRODES WITH SEPARATION OF THE CATALYTIC AND CHARGE PROPAGATION ROLES - REDUCTION OF O-2 TO H2O2 AS CATALYZED BY COBALT(II) TETRAKIS(4-N-METHYLPYRIDYL)PORPHYRIN [J].