Stabilization of a molecular water oxidation catalyst on a dye-sensitized photoanode by a pyridyl anchor.

ABSTRACT: Understanding and controlling the properties of water-splitting assemblies in dye-sensitized photoelectrosynthesis cells is a key to the exploitation of their properties. We demonstrate here that, following surface loading of a [Ru(bpy)₃]²⁺ (bpy = 2,2'-bipyridine) chromophore on nanoparticle electrodes, addition of the molecular catalysts, Ru(bda)(L)₂ (bda  =  2,2'-bipyridine-6,6'-dicarboxylate) with phosphonate or pyridyl sites for water oxidation, gives surfaces with a 5:1 chromophore to catalyst ratio. Addition of the surface-bound phosphonate derivatives with L = 4-pyridyl phosphonic acid or diethyl 3-(pyridin-4-yloxy)decyl-phosphonic acid, leads to well-defined surfaces but, following oxidation to Ru(III), they undergo facile, on-surface dimerization t

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC7490713 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature