Characterization of paramagnetic states in an organometallic nickel hydrogen evolution electrocatalyst.

ABSTRACT: Significant progress has been made in the bioinorganic modeling of the paramagnetic states believed to be involved in the hydrogen redox chemistry catalyzed by [NiFe] hydrogenase. However, the characterization and isolation of intermediates involved in mononuclear Ni electrocatalysts which are reported to operate through a Ni^I/III cycle have largely remained elusive. Herein, we report a Ni^II complex (NCHS2)Ni(OTf)2, where NCHS2 is 3,7-dithia-1(2,6)-pyridina-5(1,3)-benzenacyclooctaphane, that is an efficient electrocatalyst for the hydrogen evolution reaction (HER) with turnover frequencies of ~3,000 s^-1 and a overpotential of 670 mV in the presence of trifluoroacetic acid. This electrocatalyst follows a hitherto unobserved HER mechanism involving C-H activa

SUBMITTER: Chakrabarti S 

PROVIDER: S-EPMC9938211 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature