CO catalytic oxidation over Pd/CeO2 with different chemical states of Pd
| Autor: | Jian Ma, Yun Guo, Bai Shan, Guo-Feng Zhou, Li Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
020502 materials Inorganic chemistry Metals and Alloys 02 engineering and technology Condensed Matter Physics Catalysis Preparation method Active oxygen Chemical state 0205 materials engineering Catalytic oxidation Metallic materials Materials Chemistry Physical and Theoretical Chemistry |
| Zdroj: | Rare Metals. 39:800-805 |
| ISSN: | 1867-7185 1001-0521 |
| Popis: | Three Pd/CeO2 catalysts were, respectively, prepared by reduction–deposition and impregnation method (IMP) to investigate the effect of chemical state of Pd on CO oxidation. Two kinds of surface Pd species, namely PdO and Pdδ+ (2 < δ ≤ 4) in PdxCe1−xO2, were identified in all Pd/CeO2 samples although their relative ratios in each sample were different. Surface PdxCe1−xO2 species were found to be very active for CO oxidation, and it could act as a channel by which active oxygen species can be transferred from CeO2 to Pd species for CO oxidation. Our results reveal that the preparation method can severely influence the chemical state of Pd which can further determine the activity for CO oxidation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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