One-step controlled electrodeposition nickel sulfides heterointerfaces favoring the desorption of hydroxyl groups for efficient hydrogen generation

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Ru-Chun Li
  • Xin-Yue Zhang
  • Ze-Yue Qu
  • Feng-Yi Liu
  • Quan-Qing Xu
  • Zhao-Xia Hu
  • Jing-Wei Li
  • Mohamed-Nawfal Ghazzal

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)4377-4386
Journal / PublicationRare Metals
Volume43
Issue number9
Online published1 Jun 2024
Publication statusPublished - Sept 2024

Abstract

The heterointerface engineering involving different components or phases represents a desirable strategy for enhancing the sluggish kinetics of hydrogen evolution reaction (HER). However, constructing desired heterointerfaces and elucidating the reaction mechanisms on the interface remains a considerable challenge. In this work, we propose a straightforward electrochemical synthesis strategy to prepare the nickel sulfide-based heterointerfaces for HER. The mechanism of electrochemical synthesis is revealed, wherein metal-thiourea species can be formed at the cathode potential and subsequently oxidized to nickel sulfides at the anode potentials. Leveraging this mechanism, a range of nickel sulfides, including NiS, Ni3S2/NiS, Ni/Ni3S2 and Ni3S2, have been successfully synthesized by tuning the potential range of cyclic voltammetry. Among these, the obtained Ni3S2/NiS@CC (CC: carbon cloth) exhibits the smallest overpotential of 84 mV at 10 mA·cm−2 and high stability. Theoretical calculations further reveal that the combination of NiS and Ni3S2 induces electron redistribution at the interface, and thus the Volmer process is effectively promoted with faster water dissociation and OH desorption kinetics. Significantly, the simplicity method coupled with a clear synthesis mechanism and outstanding HER performance highlights its promising potential for practical applications. Graphical abstract: (Figure presented.) © Youke Publishing Co.,Ltd 2024.

Research Area(s)

  • Electrochemical synthesis, Heterointerfaces, Hydrogen evolution reaction, OH desorption kinetics

Citation Format(s)

One-step controlled electrodeposition nickel sulfides heterointerfaces favoring the desorption of hydroxyl groups for efficient hydrogen generation. / Li, Ru-Chun; Zhang, Xin-Yue; Qu, Ze-Yue et al.
In: Rare Metals, Vol. 43, No. 9, 09.2024, p. 4377-4386.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review