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Rich surface Co(III) ions-enhanced Co nanocatalyst benzene/toluene oxidation performance derived from (CoCoIII)-Co-II layered double hydroxide
Mo, Shengpeng1,2; Li, Shuangde1; Li, Jiaqi1,2; Deng, Yuzhou1,2; Peng, Shengpan1,2; Chen, Jiayuan1,2; Chen, Yunfa1
2016
发表期刊NANOSCALE
ISSN2040-3364
卷号8期号:34页码:15763-15773
摘要

A hierarchical Co-2.8(II) Co-1(III) layered double hydroxide (LDH) nanostructure was constructed through a facile topochemical transformation route under a dynamic oxygen atmosphere. Self-assembled coral-like CoAl LDH nanostructures via the homogeneous precipitation method were also inspected under different ammonia-releasing reagents and solvents. Benzene and toluene were chosen as probe molecules to evaluate their catalytic performance over the metal oxide CoCoO and CoAlO calcined from their corresponding LDH precursors. Nanocatalyst of trivalent Co ions replaced Al3+ ions in the bruited-like layer had a higher catalytic activity (T-99(benzene) = 210 degrees C and T-99(toluene) = 220 degrees C at a space velocity = 60 000 mL g(-1) h(-1)). Raman spectroscopy, XPS and H-2-TPR demonstrated the existence of abundant high valence Co ions that serve as active sites. TPD verified the types of active oxygen species and surface acid properties. It was concluded that the high valence Co ions induced excellent low-temperature reducibility. Surface Lewis acid sites and the surface O-ads/O-latt molar ratio (0.61) played relevant roles in determining its catalytic oxidation performance. Our design in this work provides a promising approach for the development of nanocatalysts with exposed desirable defects.

文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1039/c6nr04902h
收录类别SCI
语种英语
关键词[WOS]HYDROTALCITE-LIKE COMPOUNDS ; VOLATILE ORGANIC-COMPOUNDS ; CATALYTIC-ACTIVITY ; BENZENE OXIDATION ; OXIDE CATALYSTS ; METHANE COMBUSTION ; TOLUENE COMBUSTION ; MESOPOROUS CO3O4 ; CARBON-MONOXIDE ; COBALT OXIDE
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
项目资助者National Natural Science Foundation of China(21401200) ; strategic project of science and technology of Chinese Academy of Sciences(XDB05050000) ; National Key Technology Support Program(2014BAC21B)
WOS记录号WOS:000382053300040
引用统计
被引频次:13[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21462
专题多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Mo, Shengpeng,Li, Shuangde,Li, Jiaqi,et al. Rich surface Co(III) ions-enhanced Co nanocatalyst benzene/toluene oxidation performance derived from (CoCoIII)-Co-II layered double hydroxide[J]. NANOSCALE,2016,8(34):15763-15773.
APA Mo, Shengpeng.,Li, Shuangde.,Li, Jiaqi.,Deng, Yuzhou.,Peng, Shengpan.,...&Chen, Yunfa.(2016).Rich surface Co(III) ions-enhanced Co nanocatalyst benzene/toluene oxidation performance derived from (CoCoIII)-Co-II layered double hydroxide.NANOSCALE,8(34),15763-15773.
MLA Mo, Shengpeng,et al."Rich surface Co(III) ions-enhanced Co nanocatalyst benzene/toluene oxidation performance derived from (CoCoIII)-Co-II layered double hydroxide".NANOSCALE 8.34(2016):15763-15773.
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