A Synthetic Nickel Electrocatalyst with a Turnover Frequency Above 100,000 s −1 for H 2 Production

Reduction of acids to molecular hydrogen as a means of storing energy is catalyzed by platinum, but its low abundance and high cost are problematic. Precisely controlled delivery of protons is critical in hydrogenase enzymes in nature that catalyze hydrogen (H(2)) production using earth-abundant metals (iron and nickel). Here, we report that a synthetic nickel complex, [Ni(P(Ph)(2)N(Ph))(2)](BF(4))(2), (P(Ph)(2)N(Ph) = 1,3,6-triphenyl-1-aza-3,6-diphosphacycloheptane), catalyzes the production of H(2) using protonated dimethylformamide as the proton source, with turnover frequencies of 33,000 per second (s(-1)) in dry acetonitrile and 106,000 s(-1) in the presence of 1.2 M of water, at a potential of -1.13 volt…

• UD
  U.S. Department of Energy
• B
  Battelle
• RS
  Royal Society
• K
  Körber-Stiftung
• OO
  Office of Science
• UA
  U.S. Air Force
• OO
  Office of Naval Research
• BE
  Basic Energy Sciences
• PN
  Pacific Northwest National Laboratory