Electrocatalytic hydrogen evolution from water at low overpotentials with cobalt complexes supported by redox-active bipyridyl-NHC donors

Electrocatalytic CO2 reduction with nickel complexes supported by tunable bipyridyl-N-heterocyclic carbene donors: understanding redox-active macrocycles.

A series of nickel complexes featuring redox-active macrocycles is reported for electrocatalytic CO2 reduction. A remarkable structure-activity relationship is elucidated from the series through electrochemical studies and DFT calculations, wherein a fine electronic balance between metal and ligand redox chemistry dictates selectivity for CO2 reduction versus the competing proton reduction reac...

Electrocatalytic hydrogen evolution by cobalt difluoroboryl-diglyoximate complexes.

In the presence of moderately strong acids in CH3CN, cobalt complexes with BF2-bridged diglyoxime ligands are active catalysts for the reduction of protons to H2 at potentials as positive as -0.28 V vs. SCE.

Electrocatalytic hydrogen evolution in acidic water with molecular cobalt tetraazamacrocycles.

A series of water-soluble molecular cobalt complexes of tetraazamacrocyclic ligands are reported for the electrocatalytic production of H(2) from pH 2.2 aqueous solutions. The comparative data reported for this family of complexes shed light on their relative efficiencies for hydrogen evolution in water. Rotating disk electrode voltammetry data are presented for each of the complexes discussed,...

Reversible electrocatalytic production and oxidation of hydrogen at low overpotentials by a functional hydrogenase mimic.

Hydrogen generation catalyzed by fluorinated diglyoxime-iron complexes at low overpotentials.

Fe(II) complexes containing the fluorinated ligand 1,2-bis(perfluorophenyl)ethane-1,2-dionedioxime (dAr(F)gH(2); H = dissociable proton) exhibit relatively positive Fe(II/I) reduction potentials. The air-stable difluoroborated species [(dAr(F)gBF(2))(2)Fe(py)(2)] (2) electrocatalyzes H(2) generation at -0.9 V vs SCE with i(cat)/i(p) ≈ 4, corresponding to a turnover frequency (TOF) of ∼20 s(-1) ...