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题名: Preparation of novel Raney-Ni catalysts and characterization by XRD, SEM and XPS
作者: Lei, H;  Song, Z;  Tan, DL;  Bao, XH;  Mu, XH;  Zong, BN;  Min, EZ
关键词: Raney-Ni ;  melt-quenching ;  H-2-pretreatment ;  hydrogenation ;  cyclohexanone
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2001-06-15
卷: 214, 期:1, 页:69-76
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: In the present paper, we report on a novel procedure for preparing high performance Raney-Ni catalysts, which includes preparation of NI-AI ribbons by melt-quenching. pretreatment with hydrogen and activation through Al leaching with sodium hydroxide solution. The resultant catalyst exhibits about five times high activity in the catalytic hydrogenation of cyclohexanone than that of the Raney-Ni catalyst obtained by a conventional preparation method. The structural variations of the catalyst caused by the different pretreatments were characterized by XRD. SEM and XPS. As demonstrated, melt-quenching and H-2-pretreatment play a crucial role for forming the certain structure being composed of a high density of Ni2Al3 phase. which, in the subsequent leaching process. benefit to form ultra-uniform Raney-Ni catalyst with large surface areas. Metallic Al in hydrogen-pretreated alloys appears to be more easily leached, remaining aluminum as the dominant Al-related species on the surface, which acts as a matrix stabilizing the highly dispersed Ni and consequently improving the activity of cyclohexanone hydrogenation. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: RAY PHOTOELECTRON-SPECTROSCOPY ;  SURFACE-ANALYSIS ;  HYDROGEN ;  NICKEL
语种: 英语
WOS记录号: WOS:000168765700006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138831
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.Res Inst Petr Proc, Beijing 100083, Peoples R China

Recommended Citation:
Lei, H,Song, Z,Tan, DL,et al. Preparation of novel Raney-Ni catalysts and characterization by XRD, SEM and XPS[J]. APPLIED CATALYSIS A-GENERAL,2001,214(1):69-76.
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