Further Investigation of a Nickel-Based Homogeneous Water Oxidation Catalyst with Two cis Labile Sites

The effect of the trans axial ligand of cobalt corroles on water oxidation activity in neutral aqueous solutions

Co corroles containing electron-donating trans axial ligands are more active than those containing electron-withdrawing trans axial ligands in catalyzing water oxidation.

Further insight into the electrocatalytic water oxidation by macrocyclic nickel(ii) complexes: the influence of steric effect on catalytic activity

Macrocyclic nickel(ii) complexes with axially oriented methyl groups can impose a steric effect on the axial position of the in situ formed Ni^III center, which results in higher Ni^III/II oxidation potentials and suppresses the axial coordination of phosphate anions with the Ni^III center.

A Molecular Ni-complex Containing Tetrahedral Nickel Selenide Core as Highly Efficient Electrocatalyst for Water Oxidation

We report the highly efficient catalytic activity of a transition metal selenide-based coordination complex, [Ni{(SePⁱ Pr₂ )₂ N}₂ ], (1) for oxygen evolution and hydrogen evolution reactions (OER and HER, respectively) in alkaline solution. Very low overpotentials of 200 mV and 310 mV were required to achieve 10 mA cm^-2 for OER and HER, respectively. The overpotential for OER is one of the lowest that has been reported up to now, making this one of the best OER electrocatalysts. In addition, this molecular complex exhibits an exceptionally high mass activity (111.02 A g^-1 ) and a much higher TOF value (0.26 s^-1 ) at a overpotential of 300 mV. This bifunctional electrocatalyst enables water electrolysis in alkaline solutions at a cell voltage of 1.54 V.