Dynamic Pt–OH <sup>−</sup> ·H <sub>2</sub> O–Ag species mediate coupled electron and proton transfer for catalytic hydride reduction of 4-nitrophenol at the confined nanoscale interface
Meng Ding, Bingqian Shan, Bo Peng, Jia‐Feng Zhou, Kun Zhang
Abstract
H nuclear magnetic resonance (NMR) and the optical excitation and photoluminescence spectrum evidenced that the surface hydrous hydroxide complex bound to the metal surface (also called structural water molecules, SWs), due to the space overlap of p orbitals of two O atoms in SWs, could form an ensemble of dynamic interface transient states, which provided the alternative electron and proton transfer channels for selective transformation of 4-NP. The cationic Pt species in the Ag-Pt bimetallic catalyst mainly acts as a dynamic adsorption center to temporally anchor SWs and related reactants, and not as the active site for hydrogen activation.
Topics & Concepts
ChemistryHydrideCatalysisElectron transferSodium borohydridePhotochemistryBorohydrideInorganic chemistryPhysical chemistryHydrogenOrganic chemistryNanomaterials for catalytic reactionsElectrocatalysts for Energy ConversionCatalytic Processes in Materials Science