Progress on the Design of Electrocatalysts for Large‐Current Hydrogen Production by Tuning Thermodynamic and Kinetic Factors

• Published in: Advanced functional materials Vol. 34; no. 28
• Main Authors: Li, Ye, Feng, Ao, Dai, Linxiu, Xi, Baojuan, An, Xuguang, Xiong, Shenglin, An, Changhua
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc 01-07-2024
• Subjects: Catalytic converters; Charge transfer; Clean energy; Current density; Design factors; electrocatalyst; Electrocatalysts; Electronic structure; Energy conversion efficiency; Energy storage; Green hydrogen; hydrogen; Hydrogen evolution reactions; Hydrogen production; kinetics; large‐current; Mass transport; Thermodynamics; Water splitting
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.202316296

Electrochemical water splitting to produce green hydrogen offers a promising technology for renewable energy conversion and storage, as well as realizing carbon neutrality. The efficiency, stability, and cost of electrocatalysts toward hydrogen evolution reaction (HER) and electrocatalytic overall water splitting (EOWS) at large current densities are essential for practical application. In this review, the key factors that determine the catalytic performance of electrocatalysts at large current densities are summarized from the angel of thermodynamic and kinetic correlation. The corresponding design strategies are presented. The electronic structure and density of active sites that affect the adsorption/desorption of intermediates are considered as the thermodynamic aspects, while charge transfer and mass transport capabilities closely associated with electrode resistance and intermediate diffusion are assigned as kinetic effects. Recent development of bifunctional and integrated electrocatalysts toward EOWS is also discussed in detail. Finally, the perspective and direction on the electrocatalytic water splitting under large current density are proposed. This comprehensive overview will offer profound insights and guidance for the continued advancement of this field.
This review discusses the key factors that determine the hydrogen evolution performance of electrocatalysts at large current densities from the angle of thermodynamic and kinetic correlation, as well as presents perspective and future direction, which will provide profound insights and guidance for the continued advancement of this field.