Dynamic restructuring of nickel sulfides for electrocatalytic hydrogen evolution reaction

Ding, Xingyu; Liu, Da; Zhao, Pengju; Chen, Xing; Wang, Hongxia; Palacio, F.; Gorni, Giulio; Barawi, Mariam; García‐Tecedor, Miguel; O’Shea, Víctor A. de la Peña; Hofmann, Jan P.; Li, Jian‐Feng; Kim, Jongkyoung; Cho, Seungho; Wu, Renbing; Zhang, Kelvin H. L.

doi:10.1038/s41467-024-49015-4

articleNature CommunicationsJun 24, 2024GOLD OA

Dynamic restructuring of nickel sulfides for electrocatalytic hydrogen evolution reaction

XDXingyu Ding DLDa Liu PZPengju Zhao XCXing Chen HWHongxia Wang

Xiamen University · Fudan University · +5 more institutions

PubMed

Indexed incrossrefdoajpubmed

Abstract

Abstract Transition metal chalcogenides have been identified as low-cost and efficient electrocatalysts to promote the hydrogen evolution reaction in alkaline media. However, the identification of active sites and the underlying catalytic mechanism remain elusive. In this work, we employ operando X-ray absorption spectroscopy and near-ambient pressure X-ray photoelectron spectroscopy to elucidate that NiS undergoes an in-situ phase transition to an intimately mixed phase of Ni 3 S 2 and NiO, generating highly active synergistic dual sites at the Ni 3 S 2 /NiO interface. The interfacial Ni is the active site for water dissociation and OH* adsorption while the interfacial S acts as the active site for H*…

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Topics & keywords

Topics

Keywords

Overpotential
Non-blocking I/O
Catalysis
Nickel
X-ray photoelectron spectroscopy
Transition metal
Dissociation (chemistry)
Active site

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