Chemical and electrochemical water oxidation mediated by bis(pyrazol-1-ylmethyl)pyridine-ligated Cu(i) complexes

Abstract

The first CuI-complexes as homogeneous chemically and electrocatalytically driven WOCs operating at low and near-neutral pH.

Electrocatalytic water oxidation by copper(ii) complexes with a pentadentate amine-pyridine ligand

“…To investigate the relationship between the structure and catalytic activity and to achieve satisfactory performance of Cu complexes, numerous studies have been devoted to designing ligands with different backbone structures as well as ligands with electron-donating or electron-withdrawing functional groups. 21–26 It has been confirmed that the backbone structure of a ligand has an obvious effect on the catalytic activity of Cu complexes in the water oxidation reaction. Also, factors such as structure flexibility, electronic properties and the steric effect have a determining influence in terms of the reaction mechanism.…”

Influence of the pendant groups on electrochemical water oxidation catalyzed by cobalt(ii) triazolylpyridine complexes

“…It has been found that the distal groups on the ligands affect the catalytic activity. [17][18][19][20] On one hand, the electron-donating and electron-withdrawing capabilities of the pendant groups influence the electronic structure of the ligand and the stability of the catalytic active centre. On the other hand, some pendant groups can act as proton relays in the catalytic process.…”

Modulating the electrocatalytic activity of mononuclear nickel complexes toward water oxidation by tertiary amine group

“…29,30 Meanwhile, the relationship of steady-state catalytic current density ( j cat ) and [ Cat ] fits the formula of j cat = n ′ F [ Cat ]( D cat k cat ) 1/2 ( n ′ = 4 is the total number of electrons transferred for water oxidation to oxygen molecule). 31,32 The estimated turnover frequency (TOF, k cat ) for electrochemical water oxidation can be calculated by a simplified equation: j cat / j d = 1.827( k cat / υ ) 1/2 . The estimated k cat values for 1 and 2 are 0.014 s −1 and 0.027 s −1 , respectively (Fig.…”