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<p>The anodic small-molecule electrooxidation reaction, which is both thermodynamically and kinetically more favorable than the oxygen evolution reaction, when coupled with the hydrogen evolution reaction, has garnered increasing attention and achieved significant progress. This method presents a promising avenue for hydrogen production at industrial current densities (≥ 200&#xa0;mA/cm<sup>2</sup>) via water electrolysis while enabling the synthesis of value-added products or the removal of pollutants. However, the correlations among anode small-molecule types, catalyst design, reaction mechanisms, and electrolytic cell configuration remain unclear at industrial current densities. In this review, the characteristics and challenges of hydrogen production via coupling with various small-molecule oxidation reactions at industrial current densities are discussed for the first time, emphasizing key advances in catalyst design–substrate correlations, reaction mechanisms, and electrolytic cell configuration. Additionally, the challenges and future prospects of this field are explored.</p> Graphical Abstract <p></p>

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Energy-Efficient Hydrogen Production via Coupled Small-Molecule Oxidation at Industrial Current Densities

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Jiajing Wu,
  • Guangqing Wang,
  • Xikun Wang,
  • Weixiang Guan,
  • Delong Wang,
  • Xirui Xi,
  • Jiaqi Liu,
  • Feng Fu,
  • Ruan Chi,
  • Chunming Yang

摘要

The anodic small-molecule electrooxidation reaction, which is both thermodynamically and kinetically more favorable than the oxygen evolution reaction, when coupled with the hydrogen evolution reaction, has garnered increasing attention and achieved significant progress. This method presents a promising avenue for hydrogen production at industrial current densities (≥ 200 mA/cm2) via water electrolysis while enabling the synthesis of value-added products or the removal of pollutants. However, the correlations among anode small-molecule types, catalyst design, reaction mechanisms, and electrolytic cell configuration remain unclear at industrial current densities. In this review, the characteristics and challenges of hydrogen production via coupling with various small-molecule oxidation reactions at industrial current densities are discussed for the first time, emphasizing key advances in catalyst design–substrate correlations, reaction mechanisms, and electrolytic cell configuration. Additionally, the challenges and future prospects of this field are explored.

Graphical Abstract