CeO2 nanoparticles-decorated CoP nanocubes for accelerating alkaline electrocatalytic oxygen evolution reaction (Open Access)--颗粒学报PARTICUOLOGY

Ding, X., Huang, Y., Chen, D., & Xie, Z. (2023). CeO2 nanoparticles-decorated CoP nanocubes for accelerating alkaline electrocatalytic oxygen evolution reaction. Particuology, 81, 38-44. https://doi.org/10.1016/j.partic.2022.12.012

CeO₂ nanoparticles-decorated CoP nanocubes for accelerating alkaline electrocatalytic oxygen evolution reaction (Open Access)

Xueda Ding ^{b 1}, Yuxin Huang^{a 1}, Dongyang Chen ^b, Zailai Xie ^a *

a College of Chemistry, Fuzhou University, Fuzhou, 350116, China
b College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China

10.1016/j.partic.2022.12.012

Volume 81, October 2023, Pages 38-44

Received 21 November 2022, Revised 20 December 2022, Accepted 20 December 2022, Available online 31 December 2022, Version of Record 12 January 2023.

E-mail: zlxie@fzu.edu.cn

Highlights

• Serial of interfacial CoP/CeO₂ heterojunctions with tunable particle size of CeO₂ were successfully constructed.

• The introduction of CeO₂ nanoparticles will generate interfacial interaction.

• The CoP/CeO₂ heterostructure catalyst exhibits remarkable activities towards OER.

Abstract

Constructing heterojunction interface as an active catalyst is an effective strategy to boost electrocatalytic activity of oxygen evolution reaction (OER). Herein, we report an interfacial CoP/CeO₂ heterostructure catalyst constructed by interface engineering and selective phosphorization procedure. X-ray photoelectron spectroscopy (XPS) suggests that coupling CeO₂ nanoparticles on the surface of CoP will generate interfacial interaction at the two-phase interface, resulting in electron transfer between CoP and CeO₂ components at the interface. Benefitting from the interfacial interaction, large exposed interface area, and luxuriant mesopores structure, CoP/CeO₂ shows fascinating alkaline OER performance. At the current densities of 10 and 50 mA cm−2, the optimal CoP/CeO₂ heterojunction exhibits lower overpotential (257 and 298 mV) than either CoP (288 and 354 mV) or RuO₂ (305 and 409 mV). This work provides a facile synthetic protocol for constructing heterostructure interfaces to improve OER performance.

Graphical abstract

Keywords

Prussian blue analogue; CeO₂ nanoparticles; CoP/CeO₂; Oxygen evolution reaction

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