Insight into why the Langmuir-Hinshelwood mechanism is generally preferred

Robert Baxter, Peijun Hu

Research output: Contribution to journalArticle

82 Citations (Scopus)


In heterogeneous catalysis, the two main reaction mechanisms which have been proposed are the Langmuir-Hinshelwood and the Eley-Rideal. For the vast majority of surface catalytic reactions, it has been accepted that the Langmuir-Hinshelwood mechanism is preferred. In this study, we investigate catalytic CO oxidation on Pt(111). It is found that reaction barriers for Langmuir-Hinshelwood mechanisms actually tend to be higher than those for Eley-Rideal ones. An explanation is presented as to why it is still more probable for the reaction to proceed via the Langmuir-Hinshelwood mechanism, despite its higher reaction barrier. (C) 2002 American Institute of Physics.
Original languageEnglish
Pages (from-to)4379-4381
Number of pages3
JournalJournal of Chemical Physics
Volume116 (11)
Issue number11
Publication statusPublished - 15 Mar 2002

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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