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Catalytic hydrogen evolution and hydrogen oxidation by cobalt macrocyclic glyoxime and tetra-imine complexes

Berben, Louise A. and Hu, Xile and Brunschwig, Bruce S. and Peters, Jonas C. (2007) Catalytic hydrogen evolution and hydrogen oxidation by cobalt macrocyclic glyoxime and tetra-imine complexes. Abstracts of Papers of the American Chemical Society, 234 . INOR 921. ISSN 0065-7727. https://resolver.caltech.edu/CaltechAUTHORS:20140730-133508654

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Abstract

Cobalt complexes supported by diglyoxime ligands of the type Co(dmgBF_2)_2(CH_3CN)_2 and Co(dpgBF_2)_2(CH_3CN_2) (where dmgBF_2 is difluoroboryldimethylglyoxime and dpgBF_2 is difluoroboryldiphenylglyoxime), as well as cobalt complexes with1;143;-tetraene-N_4(Tim) ligands of the type 1;Co(Tim^R)X_23;^n+ (R = Me or Ph, X = Br or CH_3CN; n = 1 with X = Br and n = 3 with X = CH_3CN) have been obsd. to evolve H_2 electrocatalytically at potentials between -0.55 V and -0.20 V vs. SCE in CH_3CN. The potentials at which these cobalt complexes catalyzed H_2 evolution were close to the reported thermodn. potentials for the prodn. of H_2 from protons in CH_3CN, with the smallest overpotential being 40 mV for Co(dmgBF_2)_2(CH_3CN)_2. Consistent with these small overpotentials, some of the complexes were also able to oxidize H_2 in the presence of a suitable conjugate base.


Item Type:Article
ORCID:
AuthorORCID
Hu, Xile0000-0001-8335-1196
Brunschwig, Bruce S.0000-0002-6135-6727
Peters, Jonas C.0000-0002-6610-4414
Additional Information:© 2007 American Chemical Society.
Record Number:CaltechAUTHORS:20140730-133508654
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140730-133508654
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47678
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:31 Jul 2014 16:16
Last Modified:07 Oct 2019 17:36

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