In Situ Electrochemical Production of Ultrathin Nickel Nanosheets for Hydrogen Evolution Electrocatalysis

Chengyi Hu, Qiuyu Ma, Sung Fu Hung, Zhe Ning Chen, Daohui Ou, Bin Ren, Hao Ming Chen*, Gang Fu, Nanfeng Zheng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

109 Scopus citations

Abstract

Two-dimensional (2D) nanosheets (NSs) of a Ni-S coordination polymer have been successfully synthesized with the use of 2D Ni(OH)2 NSs grown on conductive carbon cloth as the template and 1,4-benzenedithiol as the ligand. In situ X-ray absorption spectroscopy revealed that the as-prepared catalyst was entirely transformed into ultrathin Ni NSs under alkaline reductive conditions. The in-situ-generated catalysts exhibited superior activity toward the hydrogen evolution reaction (HER) with an overpotential of 80 mV to reach 10 mA cm−2. Studies revealed that the large-area ultrathin Ni NSs served as active sites for H2 generation, and the trace sulfur adsorbed on the Ni surface promoted water dissociation. This work has developed a templating approach for preparing highly active HER electrocatalysts and identified the real active sites under electrocatalytic conditions.

Original languageEnglish
Pages (from-to)122-133
Number of pages12
JournalChem
Volume3
Issue number1
DOIs
StatePublished - 13 Jul 2017

Keywords

  • 2D material
  • coordination polymer
  • electrocatalysis
  • electrolysis
  • hydrogen evolution reaction
  • hydrogen production
  • metal-thiolate complex
  • nanosheet
  • nickel
  • nickel hydroxide

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