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题名: Ultrastable single-atom gold catalysts with strong covalent metal-support interaction (CMSI)
作者: Qiao, Botao1, 2;  Liang, Jin-Xia3, 4, 5;  Wang, Aiqin2;  Xu, Cong-Qiao3, 4;  Li, Jun3, 4;  Zhang, Tao2;  Liu, Jingyue (Jimmy)1
关键词: single-atom catalysis ;  gold catalyst ;  CO oxidation ;  covalent metal-support interaction
刊名: NANO RESEARCH
发表日期: 2015-09-01
DOI: 10.1007/s12274-015-0796-9
卷: 8, 期:9, 页:2913-2924
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Applied
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: Supported noble metal nanoparticles (including nanoclusters) are widely used in many industrial catalytic processes. While the finely dispersed nanostructures are highly active, they are usually thermodynamically unstable and tend to aggregate or sinter at elevated temperatures. This scenario is particularly true for supported nanogold catalysts because the gold nanostructures are easily sintered at high temperatures, under reaction conditions, or even during storage at ambient temperature. Here, we demonstrate that isolated Au single atoms dispersed on iron oxide nanocrystallites (Au-1/FeOx) are much more sinteringresistant than Au nanostructures, and exhibit extremely high reaction stability for CO oxidation in a wide temperature range. Theoretical studies revealed that the positively charged and surface-anchored Au1 atoms with high valent states formed significant covalent metal-support interactions (CMSIs), thus providing the ultra-stability and remarkable catalytic performance. This work may provide insights and a new avenue for fabricating supported Au catalysts with ultra-high stability.
关键词[WOS]: GAS SHIFT REACTION ;  LOW-TEMPERATURE OXIDATION ;  AUGMENTED-WAVE METHOD ;  CO OXIDATION ;  CHEMOSELECTIVE HYDROGENATION ;  HETEROGENEOUS CATALYSIS ;  CARBON-MONOXIDE ;  ACTIVE GOLD ;  NANOPARTICLES ;  ALPHA-FE2O3
语种: 英语
WOS记录号: WOS:000361057000013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146516
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Tsinghua Univ, Minist Educ, Dept Chem, Beijing 100084, Peoples R China
4.Tsinghua Univ, Minist Educ, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China
5.Guizhou Normal Coll, Guizhou Prov Key Lab Computat Nanomat Sci, Guiyang 550018, Peoples R China

Recommended Citation:
Qiao, Botao,Liang, Jin-Xia,Wang, Aiqin,et al. Ultrastable single-atom gold catalysts with strong covalent metal-support interaction (CMSI)[J]. NANO RESEARCH,2015,8(9):2913-2924.
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