Homogeneous Co3O4 film electrode with enhanced oxygen evolution electrocatalysis via surface reduction

Xiang Li; Bo Yang; Yaqin Wu; Saisai Lin; Lin Zhang

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Homogeneous Co₃O₄ film electrode with enhanced oxygen evolution electrocatalysis via surface reduction

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- Homogeneous Co₃O₄ film electrode with enhanced oxygen evolution electrocatalysis via surface reduction
- Chinese Journal of Chemical Engineering Vol. 29, Issue 1, Pages: 221-227(2021)
- Affiliations：
  
  1. Key laboratory of Biomass Chemical Engineering, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University,Hangzhou,China,310027
  2. Research and Development Center of Water Treatment Technology Co., Ltd.,Hangzhou,China,310012
- Author bio：
- Funds：
- DOI：
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- Published：2021
- Accepted：
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摘要

Abstract

Homogeneous NaBH

-reduced Co

thin film electrodes with enhanced oxygen evolution electrocatalysis were obtained

via

a controlled-synthesis route. Firstly CoO

colloids were synthesized

via

ethylene glycol solvothermal method and cast on conductive glass substrates. The oxygen evolution reaction (OER) electrocatalysis of these as-prepared Co

thin films were then significantly enhanced

via

a simple surface reduction by NaBH

solution. The OER catalytic performance of the NaBH

-reduced thin films was strongly dependent on the NaBH

concentration. The use of NaBH

-reduced thin film electrodes for OER in alkaline solution supported higher current density and consequently negative shifts of the onset potential compared to that of the pristine. The optimal B

12.5

-Co

thin films exhibited excellent OER catalytic performances: At the current density of 10 mA·cm

-2

a low overpotential of 365 mV and a small Tafel slope of 59.0 mV·dec

-1

were observed

. In addition

these B

12.5

-Co

thin film electrodes possessed good stability that can well recover its OER performance in a 24-h chronoamperometric stability test.

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