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An efficient cerium dioxide incorporated nickel cobalt phosphide complex as electrocatalyst for All-pH hydrogen evolution reaction and overall water splitting.

Authors :
Li D
Guo Z
Zhao R
Ren H
Huang Y
Yan Y
Cui W
Yao X
Source :
Journal of colloid and interface science [J Colloid Interface Sci] 2024 Jan; Vol. 653 (Pt B), pp. 1725-1742. Date of Electronic Publication: 2023 Oct 04.
Publication Year :
2024

Abstract

Transition metal phosphides (TMPs) have been considered as potential electrocatalysts with adjustable valence states, metal characteristics, and phase diversity. However, it is necessary but remains a major challenge to obtain efficient and durable TMPs catalysts, which can realize efficiently for not only all-pH hydrogen evolution reaction (HER), but also oxygen evolution reaction (OER). Hence, cerium dioxide incorporated nickel cobalt phosphide growth on nickel foam (CeO <subscript>2</subscript> /NiCoP) is fabricated by hydrothermal and phosphating reaction. CeO <subscript>2</subscript> /NiCoP shows excellent activity for all-pH HER (overpotentials of 48, 58 and 72 mV in alkaline, neutral and acidic solution at the current density of 10 mA cm <superscript>-2</superscript> ), and has a small OER overpotential (231 mV @ 10 mA cm <superscript>-2</superscript> ). Moreover, the voltage of overall water splitting in alkaline solution and simulated seawater electrolyte is only 1.46 and 1.41 V (10 mA cm <superscript>-2</superscript> ), respectively, coupled with outstanding operational stability and corrosion resistance. Further mechanism research shows that CeO <subscript>2</subscript> /NiCoP possesses rich heterointerfaces, which serves more exposed active sites and possesses a promising superhydrophilic and superaerophobic surface. Density functional theory calculations manifest that CeO <subscript>2</subscript> /NiCoP has appropriate energy for intermediates of reactions. This work provides a deep insight into the CeO <subscript>2</subscript> /NiCoP catalyst for high-performance water/seawater electrolysis.<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2023 Elsevier Inc. All rights reserved.)

Details

Language :
English
ISSN :
1095-7103
Volume :
653
Issue :
Pt B
Database :
MEDLINE
Journal :
Journal of colloid and interface science
Publication Type :
Academic Journal
Accession number :
37827011
Full Text :
https://doi.org/10.1016/j.jcis.2023.09.144