A nickel phosphine complex as a fast and efficient hydrogen production catalyst

Lu Gan, Thomas L. Groy, Pilarisetty Tarakeshwar, Shobeir K.S. Mazinani, Jason Shearer, Vladimiro Mujica, Anne K. Jones

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Abstract

(Chemical Equation Presented) Here we report the electrocatalytic reduction of protons to hydrogen by a novel S2P2 coordinated nickel complex, [Ni(bdt)(dppf)] (bdt = 1,2-benzenedithiolate, dppf = 1,1′-bis(diphenylphosphino)ferrocene). The catalysis is fast and effi cient with a turnover frequency of 1240 s-1 and an overpotential of only 265 mV for half activity at low acid concentrations. Furthermore, catalysis is possible using a weak acid, and the complex is stable for at least 4 h in acidic solution. Calculations of the system carried out at the density functional level of theory (DFT) are consistent with a mechanism for catalysis in which both protonations take place at the nickel center.

Original languageEnglish
Pages (from-to)1109-1115
Number of pages7
JournalJournal of the American Chemical Society
Volume137
Issue number3
DOIs
Publication statusPublished - Jan 28 2015

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ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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