Issue 18, 2024

Zr-doped heterostructure interface to tune the electronic structure of bi-functional electrocatalysts for water splitting

Abstract

Electrocatalysts with earth-abundant materials for water splitting are proposed to obtain high activity and durability simultaneously by Zr-doping interface based on physical chemistry and material science for engineering applications. Here, we report a high-valence Zr metal doping-based technique to design Zr-NiFeLDH@NiCoP/NF 3D heterostructure bi-functional electrocatalysts. This approach effectively regulates the electronic structure and surface catalytic morphology; thus the incorporation of high-valence Zr significantly enhances reaction kinetics, as evidenced by the Tafel plot and electrochemical impedance spectroscopy. The electrocatalysts enriched the active sites and achieved low overpotentials, as a result of comparable performance and impressive long-term stability exceeding 100 h at a high current density of 500 mA m−2 for both HER and OER. Furthermore, Zr-NiFeLDH@NiCoP/NF exhibits exceptional overall water splitting performance, requiring only 1.53 V to reach 10 mA cm−2 and showcasing remarkable durability for 865 h as an anode and cathode. Therefore, this work demonstrates the promising potential of integrating nonprecious high-valence Zr metal into Zr-NiFeLDH@NiCoP/NF heterostructure bi-functional electrocatalysts to significantly enhance overall water splitting performance.

Graphical abstract: Zr-doped heterostructure interface to tune the electronic structure of bi-functional electrocatalysts for water splitting

Supplementary files

Article information

Article type
Paper
Submitted
20 May 2024
Accepted
31 Jul 2024
First published
31 Jul 2024

Catal. Sci. Technol., 2024,14, 5257-5265

Zr-doped heterostructure interface to tune the electronic structure of bi-functional electrocatalysts for water splitting

M. Z. Sultana, J. Liu, D. Lin, Q. Xu, Z. Xu, M. Pang, Y. Zhen, P. Wang, L. Wan, S. S. Yan and B. Wang, Catal. Sci. Technol., 2024, 14, 5257 DOI: 10.1039/D4CY00642A

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