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题名: Oxygen vacancy enhanced catalytic activity of reduced Co3O4 towards p-nitrophenol reduction
作者: Chen, Huihui1, 2;  Yang, Mei1;  Tao, Sha1, 2;  Chen, Guangwen1
关键词: Co3O4 ;  Reduced ;  Oxygen vacancy ;  p-Nitrophenol ;  NaBH4
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2017-07-15
DOI: 10.1016/j.apcatb.2017.03.038
卷: 209, 页:648-656
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: With the aim of replacing noble metal-based catalysts, many efforts have been devoted to the development of highly active non-noble metal-based catalysts for the reduction of p-nitrophenol (p-NP) to p-aminophenol (p-AP) by NaBH4. As a typical transition metal oxide, pristine Co3O4 is normally considered to be poorly active towards the reduction of p-NP to p-AP. In this work, the catalytic activity of pristine Co3O4 was remarkably enhanced by a facile surface reduction with aqueous NaBH4. With the characterization results of various techniques such as XRD, TEM, H2-TPR and XPS, the enhancement in the catalytic activity was attributed to the oxygen vacancies generated during the surface reduction process. The catalytic activity of reduced Co3O4 was found to be strongly dependent on the reduction time and NaBH4 concentration used for catalyst preparation. Through the surface reduction with 0.05 mol/L aqueous NaBH4 for 40 min, the as-prepared reduced Co3O4 showed the best catalytic activity in term of the shortest induction time (<0.75 min) and highest mass-normalized rate constant (20.86 min(-1) g(-1) L). Furthermore, the as-prepared reduced Co3O4 displayed no obvious deactivation during the five successive cycles. (C) 2017 Elsevier B.V. All rights reserved.
关键词[WOS]: METAL-ORGANIC FRAMEWORKS ;  4-NITROPHENOL REDUCTION ;  GOLD NANOPARTICLES ;  EFFICIENT CATALYSTS ;  CONTROLLED POROSITY ;  SODIUM-BOROHYDRIDE ;  HIGH-PERFORMANCE ;  GREEN SYNTHESIS ;  LOW-TEMPERATURE ;  CO OXIDATION
语种: 英语
WOS记录号: WOS:000400584900065
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152018
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, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Chen, Huihui,Yang, Mei,Tao, Sha,et al. Oxygen vacancy enhanced catalytic activity of reduced Co3O4 towards p-nitrophenol reduction[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,209:648-656.
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