A highly efficient method for characterizing the kinetics of hydrogen evolution reaction

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Anti-corrosion Methods and Materials Pub Date : 2024-09-09 DOI:10.1108/acmm-07-2024-3053

Xilin Xiong, Jingjing Yang, Tongqian Chen, Tong Niu

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Abstract

Purpose

The purpose of this study is to provide a highly efficient method to obtain the kinetics of the hydrogen evolution reaction (HER) on metal electrodes in an alkaline solution and to analyze the effect of thiourea addition on HER under the same cathodic overpotential.

Design/methodology/approach

A novel method based on hydrogen permeation tests, potentiodynamic polarization tests and electrochemical impedance spectroscopy was put forward to characterize the HER kinetics on metal electrode.

Findings

The study found that adding thiourea accelerated the Volmer, Heyrovsky and Tafel reactions associated with HER. In addition, it reduced the hydrogen surface coverage and increased the hydrogen permeation steady-state current density. As a result, thiourea facilitated HER, promoted the diffusion of hydrogen atoms into iron and reduced the number of hydrogen atoms in the adsorbed state.

Originality/value

This work provides novel insights into the influence of thiourea on HER kinetics, demonstrating that thiourea addition can significantly enhance HER efficiency by altering reaction dynamics and promoting hydrogen atom diffusion into iron. This has implications for hydrogen energy applications, cathodic protection and understanding hydrogen embrittlement mechanisms.

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表征氢进化反应动力学的高效方法

目的本研究旨在提供一种高效的方法，以获得碱性溶液中金属电极上氢进化反应（HER）的动力学，并分析在相同阴极过电位下添加硫脲对 HER 的影响。研究结果研究发现，添加硫脲加速了与 HER 相关的 Volmer 反应、Heyrovsky 反应和 Tafel 反应。此外，硫脲还降低了氢表面覆盖率，提高了氢渗透稳态电流密度。因此，硫脲促进了 HER，促进了氢原子向铁中的扩散，并减少了吸附状态下的氢原子数量。这项研究为硫脲对 HER 动力学的影响提供了新的见解，证明了硫脲的添加可以通过改变反应动力学和促进氢原子向铁中的扩散来显著提高 HER 效率。这对氢能应用、阴极保护和了解氢脆机理具有重要意义。

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

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.