Issue 13, 2023

Electron-transfer enhancement of urchin-like CoP–Ce2(CO3)2O/NF as an ultra-stable bifunctional catalyst for efficient overall water splitting

Abstract

Effective control of strong electron interaction at heterogeneous interfaces is crucial for the creation of highly efficient and stable bifunctional catalysts for water splitting. In this work, we synthesized an urchin-like CoP–Ce2(CO3)2O catalyst on nickel foam (CoP–Ce2(CO3)2O/NF) via a facile hydrothermal and gas-phase phosphating process, which enhances active site exposure and improves catalytic reaction kinetics. Spectroscopy analysis reveals that the enhanced performance is due to the charge transfer between CoP and Ce2(CO3)2O and the unique urchin-like structure of the hybrid catalyst. The CoP–Ce2(CO3)2O/NF catalyst showed excellent hydrogen/oxygen evolution reaction (HER/OER) performance (η10 = 85.2 and 205.5 mV) and robust long-term stability in 1.0 M KOH. Additionally, the CoP–Ce2(CO3)2O/NF(+)||CoP–Ce2(CO3)2O/NF(−) electrolyzer required only a low cell voltage of 1.82 V to produce 100 mA cm−2 for overall water splitting, outperforming most previous catalysts. This work presents a strategy for interfacial engineering to improve the activity of bifunctional heterojunction electrocatalysts for overall water splitting.

Graphical abstract: Electron-transfer enhancement of urchin-like CoP–Ce2(CO3)2O/NF as an ultra-stable bifunctional catalyst for efficient overall water splitting

Supplementary files

Article information

Article type
Research Article
Submitted
06 Feb 2023
Accepted
20 Apr 2023
First published
21 Apr 2023

Mater. Chem. Front., 2023,7, 2628-2636

Electron-transfer enhancement of urchin-like CoP–Ce2(CO3)2O/NF as an ultra-stable bifunctional catalyst for efficient overall water splitting

L. Wang, M. Huang, M. Gao, T. T. Isimjan and X. Yang, Mater. Chem. Front., 2023, 7, 2628 DOI: 10.1039/D3QM00128H

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