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The Difference Se Makes: A Bio-Inspired Dppf-Supported Nickel Selenolate Complex Boosts Dihydrogen Evolution with High Oxygen Tolerance

Zhong-Hua Pan, Yun-Wen Tao, Quan-Feng He, Qiao-Yu Wu, Li-Ping Cheng, Zhan-Hua Wei, Ji-Huai Wu, Jin-Qing Lin, Di Sun, Qi-Chun Zhang*, Dan Tian, Geng-Geng Luo*

*Corresponding author for this work

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

Abstract

Inspired by the metal active sites of [NiFeSe]-hydrogenases, a dppf-supported nickel(II) selenolate complex (dppf=1,1′-bis(diphenylphosphino)ferrocene) shows high catalytic activity for electrochemical proton reduction with a remarkable enzyme-like H2 evolution turnover frequency (TOF) of 7838 s−1 under an Ar atmosphere, which markedly surpasses the activity of a dppf-supported nickel(II) thiolate analogue with a low TOF of 600 s−1. A combined study of electrochemical experiments and DFT calculations shed light on the catalytic process, suggesting that selenium atom as a bio-inspired proton relay plays a key role in proton exchange and enhancing catalytic activity of H2 production. For the first time, this type of Ni selenolate-containing electrocatalyst displays a high degree of O2 and H2 tolerance. Our results should encourage the development of the design of highly efficient oxygen-tolerant Ni selenolate molecular catalysts.
Original languageEnglish
Pages (from-to)8275-8280
JournalChemistry - A European Journal
Volume24
Issue number33
Online published25 Apr 2018
DOIs
Publication statusPublished - 12 Jun 2018
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Research Keywords

  • DFT calculations
  • dihydrogen evolution
  • molecular catalysis
  • nickel(II) complexes
  • oxygen tolerance

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