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题名: Synergistic Effect of a Carbon Black Supported PtAg Non-Alloy Bimetal Nanocatalyst for CO Preferential Oxidation in Excess Hydrogen
作者: Chen, Limin1, 2;  Ma, Ding2, 3;  Zhang, Zhen2;  Guo, Yuanyuan1;  Ye, Daiqi1;  Huang, Bichun1
关键词: heterogeneous catalysis ;  hydrogen ;  platinum ;  silver ;  supported catalysts
刊名: CHEMCATCHEM
发表日期: 2012-12-01
DOI: 10.1002/cctc.201200365
卷: 4, 期:12, 页:1960-1967
收录类别: SCI
文章类型: Article
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Carbon black (CB) supported PtAg non-alloy bimetal catalysts were prepared by incipient wetness impregnation and evaluated for CO preferential oxidation in excess H2 (PROX). PtAg/CB catalysts exhibited an evident synergistic effect. The catalyst support selection is crucial to the synergistic effect. X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning TEM energy dispersive X-ray analysis (STEM-EDX) characterization indicates no alloy was formed over the PtAg/CB catalyst after activation in H2 at 500 degrees C for 2 h. However, temperature-programmed reduction (TPR) and XRD data evidenced strong interactions between platinum and silver, as a result of their simultaneous reduction and high temperature activation. The Pt?Ag interactions result in high catalytic performance and the synergistic effects. This is another example of model catalyst research translating to real world catalysis. PtAg non-alloy catalysts may also be effective in eliminating or alleviating catalyst poisoning by CO-like intermediates in direct liquid fuel cells.
关键词[WOS]: SELECTIVE OXIDATION ;  CATALYTIC-OXIDATION ;  OXYGEN REDUCTION ;  SILVER CATALYSTS ;  AG NANOPARTICLES ;  RICH STREAM ;  FUEL-CELL ;  SURFACE ;  SILICA ;  PLATINUM
语种: 英语
WOS记录号: WOS:000311698800015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142890
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.S China Univ Technol, Coll Environm Sci & Engn, Guangdong Prov Key Lab Atmospher Environm & Pollu, Guangzhou 510006, Guangdong, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China

Recommended Citation:
Chen, Limin,Ma, Ding,Zhang, Zhen,et al. Synergistic Effect of a Carbon Black Supported PtAg Non-Alloy Bimetal Nanocatalyst for CO Preferential Oxidation in Excess Hydrogen[J]. CHEMCATCHEM,2012,4(12):1960-1967.
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