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Generation of Oxygen Vacancies at a Au/TiO 2 Perimeter Interface during CO Oxidation Detected by in Situ Electrical Conductance Measurement

2012; American Chemical Society; Volume: 135; Issue: 2 Linguagem: Inglês

10.1021/ja310999c

1943-2984

Yasushi Maeda, Yasuo Iizuka, Masanori Kohyama,

Gas Sensing Nanomaterials and Sensors

Although the importance of a Au/oxide perimeter interface has been recognized in the field of gold catalysis, the experimental evidence on the reaction occurring at the perimeter is still limited. In this research, we applied in situ electrical conductance measurement (in situ ECM) to measure the CO oxidation with O2 over Au/TiO2 catalyst powder and found that the oxygen vacancies are generated at the Au/TiO2 perimeter interface during the CO oxidation. The present result supports the reaction model in which oxygen molecules are activated on such oxygen vacancies.