Comparative studies of redox behaviors of Pt-Co/SiO2 and Au-Co/SiO2 catalysts and their activities in CO oxidation
文献类型：期刊论文
| 作者 | Xu, Xuejun1; Fu, Qiang1; Wei, Mingming1; Wu, Xing2; Bao, Xinhe1 |
| 刊名 | catalysis science & technology
 |
| 出版日期 | 2014 |
| 卷号 | 4期号:9页码:3151-3158 |
| 英文摘要 | silica supported pt-co and au-co nanoparticles (nps) were subjected to various redox processes and characterized by x-ray diffraction, x-ray absorption near edge structure, and x-ray photoelectron spectroscopy. we found that most of the co oxide (coox) species on pt nps can be reduced at 100 degrees c forming an alloy structure with pt at elevated temperatures. oxidation of co in the reduced sample takes place gradually with increasing temperatures. in contrast, temperatures higher than 400 degrees c are needed to reduce coox on au nps and co atoms hardly form an alloy with au even at 600 degrees c. the co species in the reduced au-co/sio2 sample were quickly oxidized in an o-2 atmosphere at room temperature. high co oxidation activity was observed in the pt-co/sio2 catalyst reduced below 300 degrees c; however this necessitated reduction at 600 degrees c of the au-co/sio2 catalyst. the results illustrate a stronger interaction of co (coox) with pt than with au. in both systems, the optimum treatment conditions are to produce a similar coo-on-noble metal (nm) active structure and maximize the density of interface sites between the surface coo structure and the nm support. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | fischer-tropsch synthesis ; bimetallic catalysts ; cobalt oxide ; supported catalysts ; co3o4 nanocrystals ; nanoparticles ; au ; oxygen ; reactivity ; nanostructures |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000340208400043 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/145464]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.E China Normal Univ, Dept Elect Engn, Shanghai 200241, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Xuejun,Fu, Qiang,Wei, Mingming,et al. Comparative studies of redox behaviors of Pt-Co/SiO2 and Au-Co/SiO2 catalysts and their activities in CO oxidation[J]. catalysis science & technology,2014,4(9):3151-3158. |
| APA | Xu, Xuejun,Fu, Qiang,Wei, Mingming,Wu, Xing,&Bao, Xinhe.(2014).Comparative studies of redox behaviors of Pt-Co/SiO2 and Au-Co/SiO2 catalysts and their activities in CO oxidation.catalysis science & technology,4(9),3151-3158. |
| MLA | Xu, Xuejun,et al."Comparative studies of redox behaviors of Pt-Co/SiO2 and Au-Co/SiO2 catalysts and their activities in CO oxidation".catalysis science & technology 4.9(2014):3151-3158. |
入库方式： OAI收割
来源：大连化学物理研究所
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