Boosting Oxygen Reduction Reaction Selectivity in Metal Nanoparticles with Polyoxometalates.

ABSTRACT: The lack of selectivity toward the oxygen reduction reaction (ORR) in metal nanoparticles can be linked to the generation of intermediates. This constitutes a crucial constraint on the performance of specific electrochemical devices, such as fuel cells and metal-air batteries. To boost selectivity of metal nanoparticles, a novel methodology that harnesses the unique electrocatalytic properties of polyoxometalates (POM) to scavenge undesired intermediates of the ORR (such as HO₂ ^-) promoting selectivity is proposed. It involves the covalent functionalization of metal nanoparticle's surface with an electrochemically active capping layer containing a new sulfur-functionalized vanadium-based POM (AuNP@POM). To demonstrate this approach, preformed thiolate Au(111) nanopart

SUBMITTER: Quiros-Diez EP 

PROVIDER: S-EPMC11672175 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature