A Nickel Phosphine Complex as a Fast and Efficient Hydrogen Production Catalyst

作者：Gan Lu; Groy Thomas L; Tarakeshwar Pilarisetty; Mazinani Shobeir K S; Shearer Jason; Mujica Vladimiro; Jones Anne K^*

来源：Journal of the American Chemical Society, 2015, 137(3): 1109-1115.

DOI：10.1021/ja509779q

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 efficient 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.

• 出版日期2015-1-28