Unlocking the potential of chemical-assisted water electrolysis for green hydrogen production†

Industrial Chemistry & Materials Pub Date : 2025-02-24 DOI:10.1039/D4IM00163J

Jiwoo Lee, Sol A. Lee, Tae Hyung Lee and Ho Won Jang

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Abstract

Despite global efforts to reduce the use of fossil fuels, carbon dioxide (CO₂) emissions continue to rise. As the demand for clean energy grows, hydrogen (H₂), which does not emit CO₂ during combustion, is emerging as a promising energy resource. Among the various hydrogen production technologies, water electrolysis is attracting attention as a method for producing green hydrogen without carbon emissions. However, its high reaction overpotentials, due to complex reaction pathways, are a major factor limiting its energy efficiency. To address these issues, chemical-assisted water electrolysis is considered as an innovative alternative. This technology enables hydrogen production at lower voltages. Moreover, it can generate high-value products and remove pollutants, providing both environmental and energy benefits. In this review, we introduce various types of chemical-assisted water electrolysis and discuss the latest advances in catalyst design and reaction mechanisms aimed at reducing applied system voltage. Finally, we address the main challenges and prospects of chemical-assisted water electrolysis.

Keywords: Chemical-assisted water electrolysis; Hybrid water electrolysis; Overpotential; Hydrogen; Electrocatalyst; Value-added product.

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释放化学辅助水电解绿色制氢的潜力

尽管全球都在努力减少化石燃料的使用，但二氧化碳（CO2）排放量仍在继续上升。随着对清洁能源需求的增长，在燃烧过程中不排放二氧化碳的氢（H2）正成为一种有前景的能源。在各种制氢技术中，水电解作为一种无碳排放的绿色制氢方法备受关注。然而，由于反应途径复杂，其反应过电位高，是限制其能量效率的主要因素。为了解决这些问题，化学辅助水电解被认为是一种创新的替代方案。这项技术可以在较低的电压下生产氢气。此外，它可以产生高价值的产品和去除污染物，提供环境和能源效益。在本文中，我们介绍了各种类型的化学辅助水电解，并讨论了旨在降低系统电压的催化剂设计和反应机理的最新进展。最后，我们讨论了化学辅助电解水的主要挑战和前景。关键词：化学辅助水电解；混合水电解；过电压;氢;Electrocatalyst;增值产品。

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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Industrial Chemistry & Materials chemistry, chemical engineering, functional materials, energy, etc.-

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