Abstract

Reaction of 2-pyridylamino-N,N-bis(2-methylene-4-methoxy-6-tert-butylphenol) (H2L) and MoCl5 gives a Mo(VI) complex [MoL(O)2] 1, which has been determined by X-ray crystallography. Electrochemical studies show that complex 1 can catalyze hydrogen evolution from acetic acid with a turnover frequency (TOF) of 39 (DMF) mol/h at an overpotential of 642mV and from water with a TOF of 360 (pH7.0) mol/h at an overpotential of 907mV. Sustained proton reduction catalysis occurs at glassy carbon (GC) electrode from water to give H2 over a 72h electrolysis period and no observable decomposition of the catalyst.

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