A Highly Active "NiO-on-Au" Surface Architecture for CO Oxidation
文献类型：期刊论文
| 作者 | Xu, Xuejun; Fu, Qiang; Guo, Xiaoguang; Bao, Xinhe |
| 刊名 | acs catalysis
 |
| 出版日期 | 2013-08-01 |
| 卷号 | 3期号:8页码:1810-1818 |
| 关键词 | inverse catalysts Au catalysis CO oxidation NiO redox treatment |
| 英文摘要 | supported au-ni nanocatalysts consisting of au nanoparticies decorated with ni/nio nanostructures were synthesized using a two-step method and characterized by x-ray diffraction, transmission electron microscopy, x-ray photoelectron spectroscopy, and x-ray absorption spectroscopy. the structural characterization indicates that a small part of surface ni atoms can diffuse into au cores upon reduction at 600 degrees c, while the alloyed ni atoms segregate onto the au nanoparticle surfaces when oxidizing at a similar temperature. the inward and outward diffusion of ni atoms at au surfaces are reversible with response to cycled reduction and oxidation treatments. co oxidation reactions over the au-ni catalysts suggest that au nanoparticles decorated with highly dispersed nio nanopatches are the active surface architecture. optimum activity has been observed by maximizing the density of boundaries between nio patches and au surfaces, which can be achieved through suitable redox pretreatments of the au-ni catalysts. nio surface structures in the "nio-on-au" inverse catalysts not only enhance au-catalyzed co oxidation performance but also prevent sintering of au nanoparticles at elevated temperatures. similar high activity for the co oxidation has been observed in the "coox-on-au" and "feox-on-au" inverse catalysts. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | supported gold catalysts ; bimetallic catalysts ; selective oxidation ; alloy nanoparticles ; shell nanoparticles ; efficient catalyst ; au/tio2 catalyst ; ferrous centers ; carbon-monoxide ; xps spectra |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000322852900017 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/137700]  |
| 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 | Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Xuejun,Fu, Qiang,Guo, Xiaoguang,et al. A Highly Active "NiO-on-Au" Surface Architecture for CO Oxidation[J]. acs catalysis,2013,3(8):1810-1818. |
| APA | Xu, Xuejun,Fu, Qiang,Guo, Xiaoguang,&Bao, Xinhe.(2013).A Highly Active "NiO-on-Au" Surface Architecture for CO Oxidation.acs catalysis,3(8),1810-1818. |
| MLA | Xu, Xuejun,et al."A Highly Active "NiO-on-Au" Surface Architecture for CO Oxidation".acs catalysis 3.8(2013):1810-1818. |
入库方式： OAI收割
来源：大连化学物理研究所
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