Identification of a flattened Pd–Ce oxide cluster as a highly efficient catalyst for low-temperature CO oxidation
| Autor: | Xiaoli Zhan, Yang Xia, Dang-guo Cheng, Jingrui Ye, Fengqiu Chen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen Catalysis 0104 chemical sciences law.invention chemistry.chemical_compound symbols.namesake Adsorption chemistry X-ray photoelectron spectroscopy Chemical engineering law symbols Calcination 0210 nano-technology High-resolution transmission electron microscopy Raman spectroscopy |
| Zdroj: | Catalysis Science & Technology. 8:5137-5147 |
| ISSN: | 2044-4761 2044-4753 |
| Popis: | An improved deposition method was employed to prepare a Pd/CeO2 catalyst, which exhibited highly efficient activity in low-temperature CO oxidation (LTO). By controlling the preparation conditions, a series of different morphologies and Pd species could be obtained to clarify the structure–activity relationship in the reaction. BET, XRD, STEM, HRTEM, XPS, Raman spectra, H2-TPR, CO/O2 transient pulse experiments and in situ DRIFTS were used to characterize the catalysts. It was found that Pd2+ was incorporated in CeOx vacancies, while calcination facilitated the intimate mixing of Pd, O and Ce. HRTEM and STEM results showed that a special flattened Pd–Ce binary oxide cluster was achieved and evenly anchored on the CeO2 surface, then CO adsorption and oxygen oxidation occured simultaneously on the cluster, leading to extremely high activity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|