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Visualization of Complex‐Anion Site Conversion on a Metal Oxide Surface
Author(s) -
Limb A. J.,
Bikondoa O.,
Muryn C. A.,
Thornton Geoff
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200602938
Subject(s) - oxide , sulfate , adsorption , bronze , oxygen , metal , sulfite , ion , inorganic chemistry , vacancy defect , chemistry , materials science , crystallography , metallurgy , organic chemistry
Oxygen vacancies are shown by STM to play a fundamental role in the stabilization of complex anions on an oxide surface at elevated temperatures. By increasing the temperature in the range 120–420 K, sulfite is transformed into sulfate on a TiO 2 (110) surface, and there is a change in the adsorption site which seems to be driven by stabilization of the adsorbate by an oxygen vacancy (see picture; Ti: red, O: blue, turquoise, and white, S: bronze).