Construction of Pd-M (M = Ni, Ag, Cu) alloy surfaces for catalytic applications

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	Construction of Pd-M (M = Ni, Ag, Cu) alloy surfaces for catalytic applications
	Li, X; Wang, XX; Liu, MC; Liu, HY; Chen, Q; Yin, YD; Jin, MS; Jin, MS (reprint author), Xi An Jiao Tong Univ, Sch Chem Engn & Technol, FIST, Xian 710049, Shaanxi, Peoples R China.; Jin, MS (reprint author), Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China.; Chen, Q (reprint author), Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China.
刊名	NANO RESEARCH
	2018-02-01
卷号	11 期号:2 页码:780-790
关键词	High-index Facets Oxygen Reduction Reaction Seed-mediated Synthesis Core-shell Nanocubes Bimetallic Nanocrystals Selective Hydrogenation Palladium Nanocrystals O-chloronitrobenzene Metal Nanocrystals Concave Nanocubes
ISSN号	1998-0124
英文摘要	The fabrication of ultrathin alloy shells as heterogeneous catalysts to increase the utilization efficiency and enhance the catalytic activity of metal atoms has been recognized as an effective method for the construction of efficient metal nanocatalysts, particularly noble-metal nanocatalysts. In this study, we demonstrate the successful formation of Pd-M (M = Ni, Ag, Cu) alloy shells with a tunable thickness on preformed nanoscale Pd seeds. The success of this synthesis mainly relies on the combination of the slow reduction of "M" ions and the subsequent diffusion of M ad-atoms into the surface lattice of Pd seeds. The composition of the Pd-M alloy shell is easily tuned by changing the type and amount of the added precursor, and the shell thickness is manipulated according to the reaction time. More significantly, the surface structure of these alloy shells is maintained after the reaction, implying that any desired surface structure of Pd-M alloy shells can be prepared by using the appropriate starting materials. Further catalytic evaluation of the hydrogenation of chloronitrobenzenes shows that these alloy surfaces exhibit significantly improved selectivity compared to the Pd seeds. The Pd-Ni alloy surfaces exhibit much better catalytic selectivity (as high as > 99%) than Pd catalysts.; The fabrication of ultrathin alloy shells as heterogeneous catalysts to increase the utilization efficiency and enhance the catalytic activity of metal atoms has been recognized as an effective method for the construction of efficient metal nanocatalysts, particularly noble-metal nanocatalysts. In this study, we demonstrate the successful formation of Pd-M (M = Ni, Ag, Cu) alloy shells with a tunable thickness on preformed nanoscale Pd seeds. The success of this synthesis mainly relies on the combination of the slow reduction of "M" ions and the subsequent diffusion of M ad-atoms into the surface lattice of Pd seeds. The composition of the Pd-M alloy shell is easily tuned by changing the type and amount of the added precursor, and the shell thickness is manipulated according to the reaction time. More significantly, the surface structure of these alloy shells is maintained after the reaction, implying that any desired surface structure of Pd-M alloy shells can be prepared by using the appropriate starting materials. Further catalytic evaluation of the hydrogenation of chloronitrobenzenes shows that these alloy surfaces exhibit significantly improved selectivity compared to the Pd seeds. The Pd-Ni alloy surfaces exhibit much better catalytic selectivity (as high as > 99%) than Pd catalysts.
学科主题	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
语种	英语
资助机构	National Natural Science Foundation of China [21471123, 21403160]; Xi'an Jiaotong University; China Postdoctoral Science Foundation [2015M582634]; Fundamental Research Funds for the Central Universities; State Key Laboratory of Chemical Resource Engineering; U. S. National Science Foundation [CHE-1308587]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79555]
专题	金属研究所_中国科学院金属研究所
通讯作者	Chen, Q; Jin, MS (reprint author), Xi An Jiao Tong Univ, Sch Chem Engn & Technol, FIST, Xian 710049, Shaanxi, Peoples R China.; Jin, MS (reprint author), Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi, Peoples R China.; Chen, Q (reprint author), Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China.
推荐引用方式 GB/T 7714	Li, X,Wang, XX,Liu, MC,et al. Construction of Pd-M (M = Ni, Ag, Cu) alloy surfaces for catalytic applications[J]. NANO RESEARCH,2018,11(2):780-790.
APA	Li, X.,Wang, XX.,Liu, MC.,Liu, HY.,Chen, Q.,...&Chen, Q .(2018).Construction of Pd-M (M = Ni, Ag, Cu) alloy surfaces for catalytic applications.NANO RESEARCH,11(2),780-790.
MLA	Li, X,et al."Construction of Pd-M (M = Ni, Ag, Cu) alloy surfaces for catalytic applications".NANO RESEARCH 11.2(2018):780-790.