Enhancement in electrocatalytic efficiency of hydrothermally synthesized SnAl2S4/ZnO approaching OER performance

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-04-19 DOI:10.1016/j.ijhydene.2025.04.065

Zarghuna Firdous , Sarah A. Alsalhi , Abhinav Kumar , Subhash Chandra , Jayanti Makasana , Suhas Ballal , R.S.K. Sharma , Piyus Kumar Pathak , Rahul Raj Chaudhary , V.L. Mishra

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Abstract

Developing valuable and reliable electrocatalysts is essential for the oxygen evolution reaction (OER) to substitute noble electrocatalysts. In this work, we explore the preparation of the SnAl₂S₄/ZnO composite via a hydrothermal process and investigate its electrocatalytic performance for OER. The interaction between SnAl₂S₄ and ZnO plays a key role in enhancing charge transfer, catalytic activity and structural stability. Moreover, electrocatalytic activity of SnAl₂S₄/ZnO composite was assessed employing nickel foam (NF) as substrate to analyze its electrolysis behavior. The electrocatalytic assessment demonstrated a remarkable overpotential of 215 mV at current density of 10 mA/cm², accompanied by lower Tafel value of 38 mV/dec, signifying advantageous OER kinetics. Electrochemical impedance spectroscopy (EIS) indicating effective charge transfer at the contact between the electrode and electrolyte. Moreover, composite material demonstrated a considerable electrochemically active surface area (ECSA = 700 cm²), markedly exceeding that of pristine materials. Long-term stability was evaluated by chronoamperometry analysis, revealing persistent catalytic activity for 50 h. The combination of these materials offers promising electrochemical properties, making it a potential candidate for future energy conversion applications.

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提高水热合成 SnAl2S4/ZnO 的电催化效率，使其接近 OER 性能

开发有价值的、可靠的电催化剂是析氧反应（OER）替代贵重电催化剂的关键。在这项工作中，我们探索了水热法制备SnAl2S4/ZnO复合材料，并研究了其对OER的电催化性能。SnAl2S4和ZnO之间的相互作用在增强电荷转移、催化活性和结构稳定性方面起着关键作用。此外，以泡沫镍（NF）为底物，评价了SnAl2S4/ZnO复合材料的电催化活性，分析了其电解行为。电催化评价表明，在电流密度为10 mA/cm2时，过电位为215 mV，同时Tafel值较低，为38 mV/dec，表明有利的OER动力学。电化学阻抗谱（EIS）表示电极与电解质接触处的有效电荷转移。此外，复合材料表现出相当大的电化学活性表面积（ECSA = 700 cm2），明显超过原始材料。通过计时电流分析评估了长期稳定性，揭示了50小时的持续催化活性。这些材料的组合具有良好的电化学性能，使其成为未来能量转换应用的潜在候选者。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.