| Title | Contributions of distinct gold species to catalytic reactivity for carbon monoxide oxidation |
| Authors | Guo, Li-Wen Du, Pei-Pei Fu, Xin-Pu Ma, Chao Zeng, Jie Si, Rui Huang, Yu-Ying Jia, Chun-Jiang Zhang, Ya-Wen Yan, Chun-Hua |
| Affiliation | Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Aggregated Mat, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China. Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China. Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China. Peking Univ, PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Che, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China. Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China. Ma, C (reprint author), Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China. |
| Keywords | GAS SHIFT REACTION LOW-TEMPERATURE OXIDATION X-RAY-ABSORPTION CO OXIDATION NANOCRYSTALLINE CEO2 ACTIVE OXYGEN IN-SITU OXIDE CERIA NANOPARTICLES |
| Issue Date | 2016 |
| Publisher | NATURE COMMUNICATIONS |
| Citation | NATURE COMMUNICATIONS.2016,7. |
| Abstract | Small-size (<5 nm) gold nanostructures supported on reducible metal oxides have been widely investigated because of the unique catalytic properties they exhibit in diverse redox reactions. However, arguments about the nature of the gold active site have continued for two decades, due to the lack of comparable catalyst systems with specific gold species, as well as the scarcity of direct experimental evidence for the reaction mechanism under realistic working conditions. Here we report the determination of the contribution of single atoms, clusters and particles to the oxidation of carbon monoxide at room temperature, by the aid of in situ X-ray absorption fine structure analysis and in situ diffuse reflectance infrared Fourier transform spectroscopy. We find that the metallic gold component in clusters or particles plays a much more critical role as the active site than the cationic single-atom gold species for the room-temperature carbon monoxide oxidation reaction. |
| URI | http://hdl.handle.net/20.500.11897/458427 |
| ISSN | 2041-1723 |
| DOI | 10.1038/ncomms13481 |
| Indexed | SCI(E) |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ 稀土材料化学与应用国家重点实验室 |
