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A Surface Defect-Promoted Ni Nanocatalyst with Simultaneously Enhanced Activity and Stability
He, S; Li, CM; Chen, H; Su, DS; Zhang, BS; Cao, XZ; Wang, BY; Wei, M; Evans, DG; Duan, X;曹兴忠; Wang BY(王宝义)
2013
发表期刊CHEMISTRY OF MATERIALS
卷号25期号:7页码:1040-1046
摘要How to achieve supported metal nanocatalysts with simultaneously enhanced activity and stability is of vital importance in heterogeneous catalysis and remains a challenging goal. In this work, a surface defect-promoted Ni nanocatalyst with a high dispersion and high particle density embedded on a hierarchical Al2O3 matrix was fabricated via a facile method involving an in situ reduction process, which exhibits excellent activity and stability simultaneously for the reaction of CO2 methanation. HRTEM, HAADF-STEM, EXAFS, and positron annihilation spectroscopy demonstrate the existence of abundant surface vacancy clusters that serve as active sites, accounting for the significantly enhanced low the temperature activity of the supported Ni nanoparticles. In addition, the anchoring effect from support gives rise to a high reaction stability, without sintering and/or aggregation of active species during long-term use.
关键词Ni nanocatalyst surface defect low-temperature activation CO2 methanation layered double hydroxides
学科领域Chemistry; Materials Science
DOI10.1021/cm303517z
收录类别SCI
WOS记录号WOS:000317438600004
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被引频次:81[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224100
专题多学科研究中心
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He, S,Li, CM,Chen, H,et al. A Surface Defect-Promoted Ni Nanocatalyst with Simultaneously Enhanced Activity and Stability[J]. CHEMISTRY OF MATERIALS,2013,25(7):1040-1046.
APA He, S.,Li, CM.,Chen, H.,Su, DS.,Zhang, BS.,...&王宝义.(2013).A Surface Defect-Promoted Ni Nanocatalyst with Simultaneously Enhanced Activity and Stability.CHEMISTRY OF MATERIALS,25(7),1040-1046.
MLA He, S,et al."A Surface Defect-Promoted Ni Nanocatalyst with Simultaneously Enhanced Activity and Stability".CHEMISTRY OF MATERIALS 25.7(2013):1040-1046.
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