Cobalt Oxide Electrode Doped with Iridium Oxide as Highly Efficient Water Oxidation Electrode

被引：33

作者：

Tae, Eunju Lee ^{[1
]}

Song, Jihye ^{[1
]}

Lee, A. Reum ^{[1
]}

Kim, Caroline Hewon ^{[1
]}

Yoon, Seokjun ^{[1
]}

Hwang, In Chul ^{[1
]}

Kim, Min Gyu ^{[2
]}

Yoon, Kyung Byung ^{[1
]}

机构：

[1] Sogang Univ, Dept Chem, Seoul 04107, South Korea

[2] Pohang Univ Sci & Technol, PAL, Pohang 790784, Gyeongbuk, South Korea

来源：

ACS CATALYSIS | 2015年 / 5卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

water oxidation; crystalline cobalt oxide; crystalline iridium oxide; Tafel plot; XAS; EXAFS; oxygen vacancy; OXYGEN EVOLUTION REACTION; X-RAY-ABSORPTION; NEUTRAL PH; CATALYST; ELECTROCATALYSTS; NANOPARTICLES; PHOSPHATE; FILM; SPECTROSCOPY; MECHANISM;

D O I：

10.1021/acscatal.5b00979

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：

Crystalline cobalt oxide nanoparticles (nc-CoOx) supported on ITO glass or Ni foam doped with 5 mol % crystalline iridium oxide nanoparticles (nc-IrOx) showed performances which are higher than those of nc-CoOx on ITO or Ni foam and nc-IrOx on a rotating glassy carbon disc electrode or Ni foam. The initial Co-III and Ir-IV become Co-IV and Ir-VI upon applying positive potentials. The nc-CoOx particles intrinsically carry (CoO5)-O-III centers which become (CoO6)-O-IV centers upon application of positive potentials. The O vacancy in (CoO5)-O-III is transferred to (IrO6)-O-VI upon application of positive potentials, giving rise to the formation of (IrO5)-O-VI centers, which are proposed to be the highly active catalytic centers for water oxidation.

引用

页码：5525 / 5529

页数：5