P4VP-Ru^II(bda) polyelectrolyte-metal complex as water oxidation catalyst: on the unique slow-diffusion and multi-charge effects of the polyelectrolyte ligand.

ABSTRACT: In this work, we analyze the catalytic mechanism of P4VP-Ru^II(bda) polyelectrolyte-metal complex (PMC) as a water oxidation catalyst and elucidate how the unique slow diffusion and multi-charge properties of the polyelectrolyte ligand dominate the catalytic process. Four poly(4-vinyl pyridine)-Ru(bda) (P4VP-Ru) PMCs with different chain lengths and controlled Ru loading amounts were prepared and used as catalysts for catalytic water oxidation. These catalysts present excellent catalytic performance with turnover numbers (TON) from ∼1200 to ∼1700 because of the good hydration properties. Surprisingly, the combined catalysis kinetics and kinetic isotope effect (KIE) studies for P4VP-Ru PMCs confirm the single-site water nucleophilic attack (WNA) mechanism in catalysis, rather than

SUBMITTER: Zheng T 

PROVIDER: S-EPMC9090605 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature