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题名: Synthesis of Nanorod-Shaped Cobalt Hydroxycarbonate and Oxide with the Mediation of Ethylene Glycol
作者: Xie, Xiaowei2;  Shang, Panju1;  Liu, Zhiquan1;  Lv, Yongge2;  Li, Yong2;  Shen, Wenjie2
通讯作者: 申文杰
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2010-02-11
DOI: 10.1021/jp911011g
卷: 114, 期:5, 页:2116-2123
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 ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Cobalt hydroxycarbonate nanorods are prepared by precipitation of cobalt acetate with sodium carbonate in ethylene glycol. Structural and chemical analyses of the intermediate phases during the precipitation and aging process revealed that amorphous cobalt hydroxide acetate is formed at the initial stage where ethylene glycol acts as a simple solvent and a coordinating agent. With the slow addition of sodium carbonate, carbonate anions are gradually intercalated into the interlayers by replacing the acetate and hydroxyl anions. This anion-exchange process induces a dissolution-recrystallization process in which ethylene glycol serves as a rate-controlling agent, producing rod-like cobalt hydroxide carbonate. During the aging process, ethylene glycol gradually incorporates into the structure to replace the carbonate and acetate anions; the interlayer structure is collapsed, and the nanorod-shape turns into thin crimped sheets. Co(3)O(4) nanorods with a diameter of about 10 nm and a length of 200-300 nm are then obtained by calcination of the nanorod-shaped cobalt hydroxycarbonate precursor. This spontaneous shape transformation from the precursor to the oxide is attributed to the unique thermal stability of the cobalt hydroxycarbonate nanorods with the presence of ethylene glycol and acetate anions in the interlayers. The Co(3)O(4) nanorods show a much superior catalytic activity for CO oxidation to the conventional spherical Co(3)O(4) nanoparticles, clearly demonstrating the morphology-dependent nanocatalysis.
关键词[WOS]: LAYERED DOUBLE HYDROXIDES ;  HYDROTALCITE-LIKE COMPOUNDS ;  ANION-EXCHANGE REACTIONS ;  CO3O4 NANORODS ;  SOLVOTHERMAL DECOMPOSITION ;  SELECTIVE SYNTHESIS ;  THERMAL-CONVERSION ;  CRYSTAL-STRUCTURE ;  BRUCITE-LIKE ;  CARBONATE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000274269700022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/103357
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, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Xie, Xiaowei,Shang, Panju,Liu, Zhiquan,et al. Synthesis of Nanorod-Shaped Cobalt Hydroxycarbonate and Oxide with the Mediation of Ethylene Glycol[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2010,114(5):2116-2123.
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