(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.
ASJC Scopus subject areas
- Colloid and Surface Chemistry
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Gan, L. (Creator), Groy, T. L. (Creator), Pilarisetty, T. (Creator), Mazinani, S. K. S. (Creator), Shearer, J. (Creator), Mujica, V. (Creator) & Jones, A. (Creator), The Cambridge Structural Database, 2015