Trends in the Exchange Current for Hydrogen Evolution

Key Points

• The research aims to analyze hydrogen chemisorption energies to elucidate trends in exchange current for hydrogen evolution.
• Developed a database using density functional theory to calculate hydrogen chemisorption energies on metal surfaces.
• Plotted measured exchange currents against calculated hydrogen adsorption energies to derive a volcano curve.
• Constructed a kinetic model to explain the origins of the observed volcanic behavior.
• A volcano curve illustrates the relationship between exchange currents and hydrogen adsorption energies.
• Platinum is identified as the most effective electrocatalyst for hydrogen evolution, based on the evaluated trends.
• The kinetic model successfully explains the observed exchange current trends.

Abstract