Rationalization of electrocatalysis of nickel phosphide nanowires for efficient hydrogen production

Authors
Chung, Young-HoonGupta, KapilJang, Jue-HyukPark, Hyun S.Jang, InjoonJang, Jong HyunLee, Yong-KulLee, Seung-CheolYoo, Sung Jong
Issue Date
2016-08
Publisher
ELSEVIER
Citation
NANO ENERGY, v.26, pp.496 - 503
Abstract
Although the electrochemical hydrogen evolution reaction (HER) has been intensively investigated for decades as a promising hydrogen production source, its economic feasibility is still questionable because of the high cost of Pt-based electrocatalysts. Transition metal phosphides are potential replacements for Pt; however, a fundamental understanding of the active catalyst site chemistry is still lacking. Such an understanding is crucial to design robust catalytic materials. The aim of this study is to rationalize the HER on the active sites of nickel phosphide (Ni2P) nanowires. Using experimental and theoretical analyses, it can be concluded that the active site of Ni2P nanowires is an exposed Ni3P2 surface generated by the oxygenated Ni3P_P surface created during the HER. This work is a breakthrough in the efficient design of phosphide-based non-Pt catalysts for electrochemical hydrogen production. (C) 2016 Elsevier Ltd. All rights reserved.
Keywords
ACTIVE EDGE SITES; ELECTROLYTIC HYDROGEN; EVOLUTION REACTION; NANOPARTICLES; CATALYSTS; GRAPHENE; NANOSHEETS; ADSORPTION; NI2P(001); SURFACE; ACTIVE EDGE SITES; ELECTROLYTIC HYDROGEN; EVOLUTION REACTION; NANOPARTICLES; CATALYSTS; GRAPHENE; NANOSHEETS; ADSORPTION; NI2P(001); SURFACE; Hydrogen evolution reaction; Nickel phosphides; Nanowires; Density functional theory; Water electrolysis
ISSN
2211-2855
URI
https://pubs.kist.re.kr/handle/201004/123816
DOI
10.1016/j.nanoen.2016.06.002
Appears in Collections:
KIST Article > 2016
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