Abstract
Alkaline water electrolysis despite having a variety of choices for anodic oxygen evolution reaction (OER) catalysts out of non-precious metals suffers significantly due to the poor kinetics of cathodic hydrogen evolution reaction (HER) even with the state-of-the-art Pt and equally active Ru. The Volmer-step (water dissociation (WD) coupled proton adsorption) of alkaline HER is mostly the rate-determining step (RDS) and costs most of the work required. In this review, recent developments in improving the HER kinetics of Pt and Ru with Volmer-step promotors and electronic structure modulators have been comprehensively analyzed and critically presented with the challenges and prospects.
Original language | English |
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Article number | 100961 |
Journal | Current Opinion in Electrochemistry |
Volume | 33 |
DOIs | |
Publication status | Published - 2022 Jun |
Keywords
- Electrocatalysis
- Hydrogen evolution reaction
- Metal chalcogenides
- Metal hydroxides
- Metal phosphides
- Pt
- Ru
ASJC Scopus subject areas
- Analytical Chemistry
- Electrochemistry