Issue 53, 2023

Hydrogen production by traditional and novel alkaline water electrolysis on nickel or iron based electrocatalysts

Abstract

Hydrogen production through alkaline water electrolysis holds great promise as a scalable solution for renewable energy storage and conversion. The development of non-precious metal-based electrocatalysts with low-overpotential for alkaline water electrolysis is essential to decrease the cost of electrolysis devices. Although the Ni-based and Fe-based electrocatalysts have been commercially employed in the cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER), it is imperative to persistently pursue the advancement of highly efficient electrocatalysts with enhanced current density and fast kinetics. This feature article overviews the progress of NiMo HER cathodes and NiFe OER anodes in the traditional alkaline water electrolysis process for hydrogen production, including the detailed mechanisms, preparation strategies, and structure–function relationship. Moreover, recent advances of Ni-based and Fe-based electrodes in the process of novel alkaline water electrolysis, involving small energetic molecule electro-oxidation and redox mediator decoupled water electrolysis, are also discussed for hydrogen production with low cell voltage. Finally, the perspective of these Ni-based and Fe-based electrodes in the mentioned electrolysis processes is proposed.

Graphical abstract: Hydrogen production by traditional and novel alkaline water electrolysis on nickel or iron based electrocatalysts

Article information

Article type
Feature Article
Submitted
28 Feb 2023
Accepted
26 May 2023
First published
26 May 2023

Chem. Commun., 2023,59, 8205-8221

Hydrogen production by traditional and novel alkaline water electrolysis on nickel or iron based electrocatalysts

R. Zhang, A. Xie, L. Cheng, Z. Bai, Y. Tang and P. Wan, Chem. Commun., 2023, 59, 8205 DOI: 10.1039/D3CC00996C

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