Single-Particle Spectroelectrochemistry: Plasmon-Mediated Catalytic Activity Enhancement by Electrochemical Surface Engineering in Individual Gold Nanorods.

ABSTRACT: Understanding the enhancement of plasmon-mediated electrocatalytic activity in individual gold nanorods (AuNRs) remains limited. Herein, we report a single-particle spectroelectrochemical study on the electrochemical growth and catalytic role of Cu and Cu _x S layers on AuNRs, formed via controlled deposition potentials. Underpotential deposition (UPD) of Cu on AuNRs induces a blueshift and intensity enhancement in the localized surface plasmon resonance (LSPR) spectrum, attributed to increased electron density from Cu. At more cathodic potentials, bulk Cuprimarily as lumpy Cu _x Ois deposited, introducing a new Cu-related LSPR peak. In situ LSPR tracking reveals insights into the electrochemical kinetics of Cu²⁺ species and its

SUBMITTER: Ramasamy M 

PROVIDER: S-EPMC12569684 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature