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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
Source PublicationChemistry of Materials
ISSN0897-4756
Volume25Issue:7Pages:1040-1046
AbstractHow 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.
description.department[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
KeywordNi 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
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71256
Collection中国科学院金属研究所
Recommended Citation
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.
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