Hydride Formation and Decomposition on Cu(111) in HClO₄.

ABSTRACT: Cu electrodeposition and the electrocatalysis of hydrogenation reactions thereupon involve significant interactions with adsorbed hydrogen. Electrochemical mass spectrometry (EC-MS) is used to explore the formation and decomposition of surface hydride on Cu(111) in 0.1 mol L^-1 HClO₄. Hydride formation is associated with two reduction waves that reflect the potential-dependent H_ads coverage and its reconstruction. Voltammetric cycling reveals an additional oxidative and reductive feature at ≈ -0.05 V versus the reversible hydrogen electrode (RHE) that reflects the state of the 2D surface hydride. Extending the voltammetric window to more negative potentials results in an increase in H_ads coverage and surface reconstruction that subsequently leads

SUBMITTER: Raciti D 

PROVIDER: S-EPMC11844892 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature