A study of photocatalytic, chemical, and electrocatalytic water oxidation on ACo2O4 (A = Ni, Cu, Zn) samples through doping different metal ions

被引：71

作者：

Zhao, Yukun ^{[1
,2
]}

Zhou, Xichen ^{[1
,2
]}

Ding, Yong ^{[1
,2
,3
]}

Huang, Jingwei ^{[1
,2
]}

Zheng, Min ^{[1
,2
]}

Ye, Weichun ^{[1
,2
]}

机构：

[1] Lanzhou Univ, State Key Lab Appl Organ Chem & Resources Utiliza, Key Lab Nonferrous Met Chem, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China

[3] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2016年 / 338卷

基金：

中国国家自然科学基金;

关键词：

ACo(2)O(4) samples; Water oxidation; Catalytic activity order; Doping; Charge and electron transport; SPLITTING RECENT PROGRESS; IN-SITU FORMATION; COBALT-OXIDE; ARTIFICIAL PHOTOSYNTHESIS; POLYOXOMETALATE CATALYST; MOLECULAR CATALYSTS; EFFICIENT CATALYST; PHOTOSYSTEM-II; OXYGEN; NANOWIRES;

D O I：

10.1016/j.jcat.2016.02.003

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：

ACo(2)O(4) samples were synthesized as water oxidation catalysts. The samples were characterized by multiple experiments to confirm their uniform morphology, which belongs to the spine] structure (Fd3m space group). The catalytic activity of ACo(2)O(4) samples was investigated under photochemical, chemical, and electrochemical conditions; it follows the catalytic activity order NiCo2O4 > CuCo2O4 > ZnCo2O4. This activity sequence results from different doping metal ions in {Co4O4} motifs, which act as the active sites of water oxidation. Electrochemical impedance spectroscopy and other experimental data demonstrate that ACo(2)O(4) samples doped with different metal ions may influence the rate of charge and electron transport. Therefore, the catalytic activity of water oxidation followed the above order. (C) 2016 Elsevier Inc. All rights reserved.

引用

页码：30 / 37

页数：8

共 58 条

[1] Photocatalytic Water Oxidation by a Mixed-Valent Mn3IIIMnIVO3 Manganese Oxo Core that Mimics the Natural Oxygen-Evolving Center [J].