Ultrafine cobalt oxide nanosheets for enhanced high activity towards oxygen evolution reaction

被引：4

作者：

Song, Cuimeng ^{[1
,2
]}

Luo, Hubin ^{[2
,3
]}

Duan, Xuliang

Li, Yun ^{[2
]}

Li, Yujin ^{[1
]}

Yang, Yinhang

Wu, Jian ^{[2
,3
,5
]}

Wang, Fang ^{[4
]}

Meng, Fanbin ^{[1
]}

Zhang, Jian ^{[2
,3
,5
]}

机构：

[1] Hebei Univ Technol, Sch Mat Sci & Engn, 29 Guangrong Dao, Tianjin 300130, Peoples R China

[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Ningbo 315201, Peoples R China

[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techno, Ningbo 315201, Peoples R China

[4] Ningbo Univ Technol, Ningbo 315211, Peoples R China

[5] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Lab Magnet Mat & Devices, Ningbo 315201, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2022年 / 171卷

基金：

中国国家自然科学基金;

关键词：

Cobalt oxide nanosheets; Electrocatalysis; Oxygen evolution reaction; Phase transition; LAYERED DOUBLE HYDROXIDE; EFFICIENT; ELECTROCATALYST; EXFOLIATION; VACANCIES; CO3O4;

D O I：

10.1016/j.catcom.2022.106520

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：

Cobalt oxide (CoO) nanosheets with a size of about 2.7 nm are prepared. The proper annealing temperatures (200 degrees C-400 degrees C) are used to control the conversion of CoO nanosheets to high-ratio hexagonal phases from highratio cubic phases at room temperature. The analysis revealed the hexagonal phase is preferable to cubic phase for oxygen evolution reaction of CoO nanosheets. The ultrafine CoO nanosheets with high-ratio hexagonal phases showed a particularly high mass activity of 5597Ag-1 at 1.615 V, 22.8 times higher than that of the noble metal Ru cluster electrocatalyst. Our study indicates an effective way to synthesize nanosheet catalysts with high mass activity.

引用

页数：6

共 56 条

[1] Tailoring Morphology and Electronic Structure of Cobalt Iron Oxide Nanowires for Electrochemical Oxygen Evolution Reaction [J].