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

Cuimeng Song; Hubin Luo; Xuliang Duan; Yun Li; Yujin Li; Yinhang Yang; Jian Wu; Fang Wang; Fanbin Meng; Jian Zhang

Catalysis Communications (Nov 2022)

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

Cuimeng Song,
Hubin Luo,
Xuliang Duan,
Yun Li,
Yujin Li,
Yinhang Yang,
Jian Wu,
Fang Wang,
Fanbin Meng,
Jian Zhang

Affiliations

Cuimeng Song: School of Material Science and Engineering, Hebei University of Technology, 29 Guangrong dao, hongqiao District, Tianjin 300130, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Hubin Luo: CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Xuliang Duan: CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Yun Li: CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Yujin Li: School of Material Science and Engineering, Hebei University of Technology, 29 Guangrong dao, hongqiao District, Tianjin 300130, China
Yinhang Yang: School of Material Science and Engineering, Hebei University of Technology, 29 Guangrong dao, hongqiao District, Tianjin 300130, China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Jian Wu: CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Corresponding authors at: Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Fang Wang: Ningbo University of Technology, Ningbo 315211, China
Fanbin Meng: School of Material Science and Engineering, Hebei University of Technology, 29 Guangrong dao, hongqiao District, Tianjin 300130, China; Corresponding author.
Jian Zhang: CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Corresponding authors at: Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.

Journal volume & issue: Vol. 171
p. 106520

Abstract

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Cobalt oxide (CoO) nanosheets with a size of about 2.7 nm are prepared. The proper annealing temperatures (200 °C–400 °C) are used to control the conversion of CoO nanosheets to high-ratio hexagonal phases from high-ratio 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.

Published in Catalysis Communications

ISSN: 1566-7367 (Print); 1873-3905 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/catalysis-communications

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