A Surface Defect-Promoted Ni Nanocatalyst with Simultaneously Enhanced Activity and Stability

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	A Surface Defect-Promoted Ni Nanocatalyst with Simultaneously Enhanced Activity and Stability
	S. He; C. M. Li; H. Chen; D. S. Su; B. S. Zhang; X. Z. Cao; B. Y. Wang; M. Wei; D. G. Evans; X. Duan
	2013
发表期刊	Chemistry of Materials
ISSN	0897-4756
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.
部门归属	[he, shan ; li, changming ; chen, hao ; wei, min ; evans, david g. ; duan, xue] beijing univ chem technol, state key lab chem resource engn, beijing 100029, peoples r china. [su, dangsheng ; zhang, bingsen] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [cao, xingzhong ; wang, baoyi] chinese acad sci, inst high energy phys, beijing 100049, peoples r china. ; wei, m (reprint author), beijing univ chem technol, state key lab chem resource engn, beijing 100029, peoples r china. ; weimin@mail.buct.edu.cn
关键词	Ni Nanocatalyst Surface Defect Low-temperature Activation Co2 Methanation Layered Double Hydroxides Layered Double Hydroxides High-temperature Carbon-dioxide Supported Catalysts Gold Nanoparticles Vacancy Clusters Methanation Shell Hydrogenation Selectivity
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71256
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. He,C. M. Li,H. Chen,et al. A Surface Defect-Promoted Ni Nanocatalyst with Simultaneously Enhanced Activity and Stability[J]. Chemistry of Materials,2013,25(7):1040-1046.
APA	S. He.,C. M. Li.,H. Chen.,D. S. Su.,B. S. Zhang.,...&X. Duan.(2013).A Surface Defect-Promoted Ni Nanocatalyst with Simultaneously Enhanced Activity and Stability.Chemistry of Materials,25(7),1040-1046.
MLA	S. He,et al."A Surface Defect-Promoted Ni Nanocatalyst with Simultaneously Enhanced Activity and Stability".Chemistry of Materials 25.7(2013):1040-1046.