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学科主题: 物理化学
题名: Bimetallic Au-Pd Alloy Catalysts for N2O Decomposition: Effects of Surface Structures on Catalytic Activity
作者: Wei, Xing1, 4;  Yang, Xiao-Feng1, 2, 3;  Wang, Ai-Qin1;  Li, Lin1;  Liu, Xiao-Yan5;  Zhang, Tao1;  Mou, Chung-Yuan5;  Li, Jun2, 3
通讯作者: 张涛 ;  李隽
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2012-03-15
DOI: 10.1021/jp210555s
卷: 116, 期:10, 页:6222-6232
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1501
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Highly dispersed and well-homogenized Au-Pd alloy nanoparticles with average particle sizes of similar to 2 nm and tunable Au/Pd ratios were prepared by an adsorption- reduction method on the amine-functionalized SBA-15 support. The chemisorptions of H-2 and CO as well as the IR spectra of CO adsorption show that with increase of the Au/Pd ratios the surface Pd atoms are separated by gold atoms gradually until totally isolated at Au/Pd >= 0.95, which indicates the formation of Pd single atoms at higher Au/Pd ratios. The chemisorption of O-2 shows that both the adsorption heat and the saturation uptake decrease with an increase of Au/Pd ratio, suggesting alloying Pd with gold will facilitate the desorption of oxygen adatoms as O-2, which is generally the rate-determining step for N2O decomposition reaction. Theoretical investigations using periodic DFT methods confirm the tunable O-2 desorption ability by alloying Pd with Au and indicate that contiguously located Pd sites are indispensable for N2O decomposition because they function as the active sites for the elementary step of N2O decomposition into N-2 and oxygen adatom, which becomes the rate-determining step over the Au-Pd alloy catalysts.
关键词[WOS]: NITROUS-OXIDE DECOMPOSITION ;  SUPPORTED RHODIUM CATALYSTS ;  SOLVENT-FREE OXIDATION ;  HYDROGEN-PEROXIDE ;  SELECTIVE OXIDATION ;  CO OXIDATION ;  METAL CATALYSTS ;  MILD CONDITIONS ;  PALLADIUM-GOLD ;  BENZYL ALCOHOL
语种: 英语
WOS记录号: WOS:000301509600032
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118331
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
3.Tsinghua Univ, Key Lab Organ Optoelect & Mol Engn, Minist Educ, Beijing 100084, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
5.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan

Recommended Citation:
Wei, Xing,Yang, Xiao-Feng,Wang, Ai-Qin,et al. Bimetallic Au-Pd Alloy Catalysts for N2O Decomposition: Effects of Surface Structures on Catalytic Activity[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2012,116(10):6222-6232.
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