Jacques Pécaut

TL;DR: A new family of cobalt and nickel diimine-dioxime complexes are reported as efficient and stable electrocatalysts for hydrogen evolution from acidic nonaqueous solutions with slightly lower overvoltages and much larger stabilities towards hydrolysis as compared to previously reported cobaloxime catalysts.

TL;DR: It is shown that a diimine-dioxime cobalt catalyst can be grafted to the surface of a carbon nanotube electrode and mediates H(2) generation (55,000 turnovers in seven hours) from fully aqueous solutions at low-to-medium overpotentials.

TL;DR: Computational studies demonstrate conclusively that the large Soret band red shifts seen for very nonplanar meso-tetra(tert-butyl)porphyrin compared to meso/zinc meso(methyl)porPhyrin are primarily the result of nonPlanar deformations and not IPNR, suggesting that UV-visible band shifts of tetrapyrroles in proteins are potentially useful indicators of changes in nonplanarity.

TL;DR: A new class of cobalt-based complexes among the most promising CO2-to-formic acid reducing catalysts developed to date is reported, and the role of amine groups for stabilizing key intermediates through hydrogen bonding with water molecules during hydride transfer from the Co center to the CO2 molecule is confirmed.

TL;DR: A structural and functional NiFe mimic that displays reactivity at the Ni site is reported by the detection of two catalytic intermediates that reproduce structural and electronic features of the Ni-L and Ni-R states of the enzyme during catalytic turnover.