Accelerating charge transfer to enhance H2 evolution of defect-rich CoFe2O4 by constructing a Schottky junction

Yuchao Wang; Biao Liu; Yi Liu; Chengye Song; Wenju Wang; Wenkui Li; Qingguo Feng; Yongpeng Lei

doi:10.1039/D0CC05656A

Accelerating charge transfer to enhance H₂ evolution of defect-rich CoFe₂O₄ by constructing a Schottky junction†

Yuchao Wang,‡^ab Biao Liu,‡^c Yi Liu,‡^a Chengye Song,^d Wenju Wang,

^e Wenkui Li,^d Qingguo Feng

^f and Yongpeng Lei

*^a

Author affiliations

* Corresponding authors

^a State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
E-mail: lypkd@163.com, leiyongpeng@csu.edu.cn

^b College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China

^c Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, China

^d School of Materials and Mechanical Engineering, Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang, China

^e School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, China

^f Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China

Abstract

We demonstrate a charge transfer boosted hydrogen (H₂) evolution of transition metal oxides via a Schottky junction. The FeNi and metallic defect-rich CoFe₂O₄ (DCF) as well as semiconducting nitrogen-doped carbon (NC), named as FeNi/DCF/NC, possessed only 6.5% charge transfer resistance of DCF. Theoretical calculations indicate that the enhanced electron movement happened from FeNi/DCF to NC. The H₂ evolution activity of FeNi/DCF/NC showed 5.8-fold improvement compared to that of DCF at the overpotential of 400 mV in 1.0 M KOH. This work provides an effective way to enhance the electrocatalytic activity of oxides for the H₂ evolution reaction and related reactions.

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DOI: https://doi.org/10.1039/D0CC05656A
Article type: Communication
Submitted: 19 Aug 2020
Accepted: 15 Oct 2020
First published: 16 Oct 2020

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Chem. Commun., 2020,56, 14019-14022

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Accelerating charge transfer to enhance H₂ evolution of defect-rich CoFe₂O₄ by constructing a Schottky junction

Y. Wang, B. Liu, Y. Liu, C. Song, W. Wang, W. Li, Q. Feng and Y. Lei, Chem. Commun., 2020, 56, 14019 DOI: 10.1039/D0CC05656A

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Chemical Communications

Accelerating charge transfer to enhance H₂ evolution of defect-rich CoFe₂O₄ by constructing a Schottky junction†

Abstract

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Accelerating charge transfer to enhance H₂ evolution of defect-rich CoFe₂O₄ by constructing a Schottky junction

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