Cobalt/cobalt phosphide/nitrogen-doped carbon derived from zeolitic imidazolate framework-11@zeolitic imidazolate framework-12 core-shell structure as efficient electrocatalyst for oxygen evolution reaction

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-02-03 DOI:10.1016/j.ijhydene.2025.01.014

Chen-Han Lin , Yin-Chen Lin , Chia-Lin Yeh , Lu-Yin Lin , Kuo-Chuan Ho

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Abstract

Electrochemical water splitting is considered as a promising and efficient way to produce hydrogen and oxygen, which are regarded as sustainable energy. Zeolitic imidazolate frameworks (ZIFs) have been widely utilized as sacrificial templates for synthesizing efficient electrochemical active materials with porous structure and tunable pore properties. In this study, cobalt/cobalt phosphide on N-doped carbon matrix (CPZ11@12–150) derived from the novel core-shell structure of ZIF-11@ZIF-12 is reported as a highly efficient electrocatalyst for oxygen evolution reaction (OER). With the enhanced electrical conductivity from N-doped carbon and excellent electrocatalytic activity from cobalt phosphide, the CPZ11@12–150 possesses a low overpotential (274 mV) at 10 mA cm⁻² and a small Tafel slope of 76.2 mV·dec⁻¹ in 1 M KOH. The CPZ11@12–150 also shows superior long-term stability for at least 100 h, owing to good attachment of CoP on N-doped carbon matrix and its mesoporous structure for effective releases of O₂ bubbles.

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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.