Characterization of Pt-doped SnO sub(2) catalyst for a high-performance micro gas sensor
The atomic scale structure and its dependence on Pt concentration of a Pt-doped SnO sub(2) (Pt-SnO sub(2)) thin film produced by a sputter-deposition method was investigated, which showed high-performance as a methane gas sensor. Extended X-ray absorption fine structure (EXAFS) and X-ray diffraction...
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Published in | Physical chemistry chemical physics : PCCP Vol. 15; no. 41; pp. 17938 - 17946 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
01.10.2013
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Subjects | |
Online Access | Get full text |
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Summary: | The atomic scale structure and its dependence on Pt concentration of a Pt-doped SnO sub(2) (Pt-SnO sub(2)) thin film produced by a sputter-deposition method was investigated, which showed high-performance as a methane gas sensor. Extended X-ray absorption fine structure (EXAFS) and X-ray diffraction (XRD) analyses showed that Pt-SnO sub(2) has a rutile structure similar to SnO sub(2) crystals at less than 10 at% Pt where the Pt ion was located at the Sn position in the rutile structure. There was no evidence that Pt metal clusters were formed in the Pt-SnO sub(2) films. The Pt-SnO sub(2) structure became amorphous at greater than 11 at% Pt. We found a good correlation between the methane activity and local structure of Pt. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 content type line 23 ObjectType-Feature-1 |
ISSN: | 1463-9076 1463-9084 |
DOI: | 10.1039/c3cp52490f |