H2O dissociation by SrTiO3 (100) catalytic step sites
作者： NB Brookes , FM Quinn , G Thornton
DOI: 10.1016/0042-207X(88)90090-5
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摘要: Abstract The adsorption of H 2 O on fractured and planar surfaces SrTiO 3 (100) has been studied using photoemission spectroscopy. Valence region spectra evidence molecular the surface dissociative surface. Features arising from Sr (Ti) atoms SrO (TiO ) terraces have resolved in core-level spectra: 3d (Ti 3s) features lie to lower (higher) initial energy bulk-derived peaks by ca 1.0 eV (1.7 eV). These results are consistent with expected enhancement covalent bonding TiO -terrace From valence- we deduce that step-sites, which connect two types terrace, act as catalytic centres for dissociation.
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