Preprint Review Version 2 Preserved in Portico This version is not peer-reviewed

Nickel Based Electrocatalysts for Water Electrolysis

Version 1 : Received: 5 January 2022 / Approved: 17 January 2022 / Online: 17 January 2022 (14:41:29 CET)
Version 2 : Received: 21 January 2022 / Approved: 24 January 2022 / Online: 24 January 2022 (14:30:26 CET)

A peer-reviewed article of this Preprint also exists.

Angeles-Olvera, Z.; Crespo-Yapur, A.; Rodríguez, O.; Cholula-Díaz, J.L.; Martínez, L.M.; Videa, M. Nickel-Based Electrocatalysts for Water Electrolysis. Energies 2022, 15, 1609. Angeles-Olvera, Z.; Crespo-Yapur, A.; Rodríguez, O.; Cholula-Díaz, J.L.; Martínez, L.M.; Videa, M. Nickel-Based Electrocatalysts for Water Electrolysis. Energies 2022, 15, 1609.

Abstract

Current hydrogen production is based on the reforming process leading to the emission of pollutants; therefore, a substitute production method is imminently required. Water electrolysis is an ideal alternative for large-scale hydrogen production, as it does not produce any carbon-based pollutant byproducts. Production of green hydrogen from water electrolysis using intermittent sources (e.g., solar, eolic) would facilitate clean energy storage. However, the electrocatalysts currently required for water electrolysis are noble metals, making this potential option expensive and inaccessible for industrial applications. Therefore, there is a need to develop electrocatalysts based on earth-abundant and low-cost metals. Nickel-based electrocatalysts are a fitting alternative because they are economically accessible. Extensive research has focused on developing nickel-based electrocatalysts for hydrogen and oxygen evolution. Theoretical and experimental work have addressed the elucidation of these electrochemical processes and the role of heteroatoms, structure, and morphology. Even though some works tend to be contradictory, they have lit up the path for efficient nickel-based electrocatalysts. For these reasons, herein, a review of recent progress is presented.

Keywords

water electrolysis; nickel; earth-abundant metals; electrocatalysis; HER; OER

Subject

Chemistry and Materials Science, Electrochemistry

Comments (1)

Comment 1
Received: 24 January 2022
Commenter: Marcelo Videa
Commenter's Conflict of Interests: Author
Comment: We send a revised version after attending to comments and suggestions from our reviewers.
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