Cr–V substituted nanospinel oxides as efficient electrocatalysts for hydrogen evolution reaction

IF 3.2 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of the Indian Chemical Society Pub Date : 2025-07-10 DOI:10.1016/j.jics.2025.101923

Refah S. Alkhaldi , M.A. Almessiere , B. Abuobied , A. Baykal , E. Cevik , M.A. Gondal , S.E. Shirsath , A. Manikandan

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Abstract

In this work, a novel Co_0.5Ni_0.5Cr_xV_2-xO₄ (x ≤ 0.04) electronanocatalyst was prepared using a facile hydrothermal approach for the first time. Impressively, the Co_0.5Ni_0.5Cr_xV_2-xO₄ electronanocatalyst greatly regulates electron reconfiguration by varying the composition ratio and enhances the reaction kinetics. It also ensures superior hydrogen adsorption energy and an improved number of catalytic species in the material. Profiting from the merits described above, the configured Co_0.5Ni_0.5Cr_xV_2-xO₄ (x = 0.02) electronanocatalyst has showed exceptional HER activity and produced an overpotential of 227 mV at −10 mA/cm² with a small Tafel value of 86 mV/dec in a 0.5 M H₂SO₄. The catalyst's durability is maintained at a steady current rate of 10 mA cm⁻² even after 18h of operation. The overall experimental findings showcase a feasible approach for exploring the potential of the nonprecious metal-based Co_0.5Ni_0.5Cr_xV_2-xO₄ (x ≤ 0.04) elecronanocatalyst towards alkaline HER.

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Cr-V取代纳米尖晶石氧化物作为析氢反应的高效电催化剂

本文首次采用水热法制备了新型Co0.5Ni0.5CrxV2-xO4 （x≤0.04）电子催化剂。令人印象深刻的是，Co0.5Ni0.5CrxV2-xO4电子催化剂通过改变组成比，极大地调节了电子重构，提高了反应动力学。它还确保了优越的氢吸附能和材料中催化物种数量的提高。利用上述优点，配置的Co0.5Ni0.5CrxV2-xO4 （x = 0.02）电子催化剂表现出优异的HER活性，并在- 10 mA/cm2下产生227 mV的过电位，在0.5 M H2SO4中产生86 mV/dec的小Tafel值。即使在运行18h后，催化剂的耐久性仍保持在10 mA cm−2的稳定电流速率下。整体实验结果为探索非贵金属基Co0.5Ni0.5CrxV2-xO4 （x≤0.04）电子催化剂在碱性HER中的潜力提供了一种可行的方法。

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来源期刊

Journal of the Indian Chemical Society 化学-化学综合

CiteScore

3.50

自引率

7.70%

发文量

492

审稿时长

3-8 weeks

期刊介绍： The Journal of the Indian Chemical Society publishes original, fundamental, theorical, experimental research work of highest quality in all areas of chemistry, biochemistry, medicinal chemistry, electrochemistry, agrochemistry, chemical engineering and technology, food chemistry, environmental chemistry, etc.