Tailoring the bifunctional electrocatalytic activity of nickel-cobalt sulfides derived from ZIF-67 by cerium doping to enhance the overall water splitting performance

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-03-15 DOI:10.1016/j.ijhydene.2025.03.181

Tian Lei , Jin Liang , YaXi Zhang , Guang Yang , Li Zhang

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引用次数: 0

Abstract

To stay current with energy development, designing efficient bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media is urgent. Herein, cerium is incorporated into ZIF-derived sulfides to create (Ce)NiCo–S/NF, a composite material with a nanogrid-like hierarchical structure. Importantly, it required a low overpotential of 136 mV at 10 mA cm⁻² for the HER. For the OER, it achieved current densities of 10 and 50 mA cm⁻² at low overpotentials of 209 and 245 mV, respectively. Creating a nanogrid-like hierarchical microstructure with a core-shell structure and modulation of the electronic environment through cerium doping is believed to be responsible for the improved electrocatalytic efficiency. In addition, overall water splitting demanded a low cell voltage of 1.57 V to achieve a current density of 10 mA cm⁻². This research outlines a feasible framework for an efficient material for global clean energy applications.

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通过掺铈调整 ZIF-67 衍生的镍钴硫化物的双功能电催化活性，以提高整体水分离性能

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.