3 years ago

Effect of metal centers on electrocatalytic hydrogen generation catalyzed by coordinatively saturated metal-1,10-phenanthroline complexes

Effect of metal centers on electrocatalytic hydrogen generation catalyzed by coordinatively saturated metal-1,10-phenanthroline complexes
It is apparent that coordinatively unsaturated transition complexes can catalyze hydrogen production from acid or water via metal-hydride intermediates. To test if coordinatively saturated complexes can also act as electrocatalysts for hydrogen evolution, two electrocatalytic systems based on coordinatively saturated metal-1,10-phenanthroline (phen) complexes, [MII(phen)3](PCPP)2 (PCPP = pentacyanopropenide; M = Fe, 1; Ni, 2), have been designed. The electrochemical investigations show that both 1 and 2 can act as electrocatalysts for hydrogen generation from aqueous buffer with a turnover frequency (TOF) of 630.1 and 673.5 mol of hydrogen per mole of catalyst per hour (mol H2/mol catalyst/h) at an overpotential (OP) of 838 mV. These results also show that the nickel center constitutes the better active catalyst.

Publisher URL: www.sciencedirect.com/science

DOI: S0277538717306514

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