Hydrogen interaction with the anatase TiO 2(101) surface

Ulrich Aschauer, Annabella Selloni

Research output: Contribution to journalArticle

72 Scopus citations

Abstract

The interaction of atomic hydrogen with the majority (101) surface of anatase TiO 2 is studied using density functional theory calculations both with a standard semi-local functional and with the inclusion of on-site Coulomb repulsion terms. We investigate the energetics of different adsorption configurations at surface and subsurface sites and different coverages, from low to one monolayer, as well as diffusion pathways among the different sites and recombinative H 2 desorption barriers. While H 2 desorption is the energetically most favorable process, the diffusion of H into the subsurface is found to be at least equally favorable kinetically. It is further shown that subsurface oxygen vacancies on reduced anatase are favorable adsorption sites for hydrogen atoms.

Original languageEnglish (US)
Pages (from-to)16595-16602
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume14
Issue number48
DOIs
StatePublished - Dec 28 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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