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题名: Low Pt Loading High Catalytic Performance of PtFeNi/Carbon Nanotubes Catalysts for CO Preferential Oxidation in Excess Hydrogen I: Promotion Effects of Fe and/or Ni
作者: Chen, Limin1, 2;  Ma, Ding2, 3;  Zhang, Zhen2;  Guo, Yuanyuan1;  Ye, Daiqi1;  Huang, Bichun1
关键词: Low Pt loading ;  Fe/Ni promoted Pt catalysts ;  Carbon nanotubes ;  CO preferential oxidation (PROX)
刊名: CATALYSIS LETTERS
发表日期: 2012-08-01
DOI: 10.1007/s10562-012-0850-0
卷: 142, 期:8, 页:975-983
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The commercial carbon nanotubes (CNTs-o) and purified carbon nanotubes (CNTs-p) have been utilized to prepare Pt(FeNi)/CNTs catalysts for CO preferential oxidation (PROX) in H-2 rich stream. The 3 wt%Pt0.41 %Fe 0.35 %Ni/CNTs-p catalyst after activation at 500 A degrees C in H-2 can almost completely remove CO at 6 A degrees C in feed gas containing 1 % CO, 0.5 % O-2 (volume ratio) and H-2 balance. CNTs-o supported 3 wt% Pt can also remove CO almost completely at room temperature, after activation at 500 A degrees C in the feed gas. And this catalyst can keep high activity, high selectivity and high stability for PROX of CO at room temperature. These catalysts are the most effective catalysts for PROX of CO with much lower Pt loading until so far. H-TPR, XRD, HRTEM and reaction results indicate that the Fe and/or Ni precursors have been reduced to metallic state after activation in H-2 which can be oxidized to coordinatively unsaturated FeOx and/or NiOx active species after exposure to feed gas. XPS data point out that over oxidation of Fe and Pt species will deactivate the catalysts seriously. The high catalytic performance is mainly due to the promotion effects of in situ formed coordinatively unsaturated FeOx and/or NiOx species and the unique properties of CNTs.
关键词[WOS]: CARBON NANOTUBES ;  ACTIVATED CARBON ;  SELECTIVE OXIDATION ;  H-2-RICH STREAM ;  RICH STREAM ;  MECHANISM ;  PLATINUM ;  MONOXIDE ;  ABSENCE ;  METALS
语种: 英语
WOS记录号: WOS:000307292800007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138030
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, Guangdong Prov Key Lab Atmospher Environm & Pollu, Coll Environm Sci & Engn, 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. Low Pt Loading High Catalytic Performance of PtFeNi/Carbon Nanotubes Catalysts for CO Preferential Oxidation in Excess Hydrogen I: Promotion Effects of Fe and/or Ni[J]. CATALYSIS LETTERS,2012,142(8):975-983.
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