中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Novel Ni catalysts for methane decomposition to hydrogen and carbon nanofibers
作者: Li, Y;  Zhang, BC;  Xie, XW;  Liu, JL;  Xu, YD;  Shen, WJ
通讯作者: 申文杰
关键词: Ni catalyst ;  ethylene glycol ;  fibrous shaped ;  methane decomposition ;  carbon nanofiber
刊名: JOURNAL OF CATALYSIS
发表日期: 2006-03-10
DOI: 10.1016/j.jcat.2005.12.027
卷: 238, 期:2, 页:412-424
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 501
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Novel nickel oxides with controlled crystalline size and fibrous shape were Successfully prepared by precipitation of nickel acetate and sodium carbonate aqueous Solution with the mediation of ethylene glycol. The precipitation media and temperature were found to play crucial roles in determining the crystalline size and shape of the nickel oxides. The NiO prepared in the aqueous Solutions exhibited mainly spherical particles with few nanorods, whereas the NiO samples prepared in the solution of ethylene glycol could be of spherical, fibrous, or nanorod shape, depending on the precipitation temperature. In particular, the nickel hydroxide precipitate obtained in the Solution of ethylene glycol at 393 K was alpha-Ni(OH)(2) with hydrotalcite-like structures; further calcination of this precipitate at 573-1073 K resulted in the formation of nickel oxides with similar fibrous shapes and crystalline size of 3.0-8.1 nm. Similar metallic Ni crystalline size of about 11 nm and fibrous structure were obtained by reduction of these NiO samples with hydrogen at 773 K. When further exposed to the reaction of methane decomposition, the metallic Ni crystallines still exhibited similar evolution behavior and rapidly stabilized at the critical size of 17-18 nm. Consequently, very close catalytic activities for methane decomposition over these novel Ni catalysts were observed with the carbon yields of 354-398 gC/g(Ni). The Ni crystallines departed from the fibrous structures and gradually aggregated into particles by the dissociation of the deposited carbons. These nickel particles were then highly dispersed on the in situ produced carbon, which can inhibit the further growth of nickel particle. As a result, the initial fibrous structure morphology of the metallic nickel was gradually turned into pear-like shapes. (c) 2006 Elsevier Inc. All rights reserved.
关键词[WOS]: FILAMENTOUS CARBON ;  NICKEL-CATALYSTS ;  RAMAN-SCATTERING ;  DIRECT CRACKING ;  SUPPORTED-NI ;  SILICA ;  GRAPHITE ;  NI/SIO2 ;  SURFACE ;  REDUCTION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000235625100019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/93735
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, Y,Zhang, BC,Xie, XW,et al. Novel Ni catalysts for methane decomposition to hydrogen and carbon nanofibers[J]. JOURNAL OF CATALYSIS,2006,238(2):412-424.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Li, Y]'s Articles
 [Zhang, BC]'s Articles
 [Xie, XW]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Li, Y]‘s Articles
 [Zhang, BC]‘s Articles
 [Xie, XW]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace