Trends in the Exchange Current for Hydrogen Evolution

Nørskov, Jens K.; Bligaard, Thomas; Logadóttir, Á.; Kitchin, John R.; Chen, J.G.; Pandelov, Stanislav; Stimming, Ulrich

doi:10.1149/1.1856988

articleJournal of The Electrochemical SocietyJan 1, 2005BRONZE OA

Trends in the Exchange Current for Hydrogen Evolution

JKJens K. Nørskov TBThomas Bligaard ÁLÁ. Logadóttir JRJohn R. Kitchin JCJ.G. Chen

Technical University of Denmark · Institute of Catalysis and Petrochemistry · +2 more institutions

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Abstract

A density functional theory database of hydrogen chemisorption energies on close packed surfaces of a number of transition and noble metals is presented. The bond energies are used to understand the trends in the exchange current for hydrogen evolution. A volcano curve is obtained when measured exchange currents are plotted as a function of the calculated hydrogen adsorption energies and a simple kinetic model is developed to understand the origin of the volcano. The volcano curve is also consistent with Pt being the most efficient electrocatalyst for hydrogen evolution.

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Topics & keywords

Topics

Keywords

Chemisorption
Hydrogen
Electrocatalyst
Density functional theory
Current (fluid)
Chemistry
Exchange current density
Adsorption

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