Energetics and Kinetics of Hydrogen Electrosorption on a Graphene-Covered Pt(111) Electrode

• DOI: 10.1021/jacsau.2c00648
• Publication Date: 2023-01-18T16:46:06Z
• Authors: Nakkiran Arulmozhi; Selwyn Hanselman; Viorica Tudor; Xiaoting Chen; David van Velden; Grégory F. Schneider; Federico Calle-Va...; Marc T. M. Koper
• Keywords: Energetics; Standard hydrogen electrode

The Angstrom-scale space between graphene and its substrate provides an attractive playground for scientific exploration can lead to breakthrough applications. Here, we report the energetics kinetics of hydrogen electrosorption on a graphene-covered Pt(111) electrode using electrochemical experiments, in situ spectroscopy, density functional theory calculations. overlayer influences adsorption by shielding ions from interface weakening Pt-H bond energy. Analysis proton permeation resistance with controlled defect proves that domain boundary defects point are pathways layer, agreement (DFT) calculations lowest energy pathways. Although blocks interaction anions surfaces, do adsorb near defects: rate constant is sensitively dependent anion identity concentration.