Self-limiting synthesis of AuPd coreshell nanocrystals with a near surface alloy and monolayer Pd shell structure and their superior catalytic activity on the conversion of hexavalent chromium

doi:10.1016/j.apcatb.2019.04.071

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	Self-limiting synthesis of AuPd coreshell nanocrystals with a near surface alloy and monolayer Pd shell structure and their superior catalytic activity on the conversion of hexavalent chromium
	X.Li; C.Li; D.Xiang; C.Zhang; L.Xia; X.Liu; F.Zheng; X.Xie
	2019
发表期刊	Applied Catalysis B: Environmental
ISSN	09263373
卷号	253 页码:263-270
摘要	In eliminating environmental chromium pollution, hexavalent chromium (Cr(VI))reduction by HCOOH on Pd-based bimetallic/multimetallic nanocatalysts is attracting an increasing attention. However, it is still a challenge by precisely controlling the surface interface structure of the nanocrystals (NCs)to obtain highly efficient nanocatalysts on Cr(VI))conversion. Here, a simple and robust synthesis method for Au-Pd core-shell NCs with a special interface structure has been developed by a novel self-limiting strategy. This interesting structure has a near surface alloy (NSA)of AuPd layer on Au core with outer surface of monolayer (ML)of Pd shell (denoted as NSA/ML), which is achieved only by one-pot synthesis. The self-limiting strategy is developed based on the unique catalysis reduction reaction of Au core, with which the growth of Pd shell is internally regulated by the surface Au atoms until the AuPd NCs with NSA/ML structure i.e. Au@AuPd@PdML NCs are formed. Furthermore, the AuPd coreshell NCs with the shell from NSA to NSA/ML structure can be simply obtained by adjusting the added amount of Pd precursor. More importantly, the catalytic activities of AuPd NCs for the conversion of Cr(VI)to Cr(III)present a notable difference for the Pd in Au@AuPd and Au@AuPd@PdML structures, and the Au@AuPd@PdMLNCs exhibited the superior catalytic activity for the conversion of Cr(VI). The present study demonstrates the core@NSA@shellML is an efficient nanostructure to promote the catalytic performance of coreshell NCs for practical applications. 2019
关键词	Chromium compounds,Catalyst activity,Gold,Monolayers,Nanocatalysts,Nanocrystalline alloys,Nanocrystals,Palladium
DOI	10.1016/j.apcatb.2019.04.071
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收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/63244
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	X.Li,C.Li,D.Xiang,et al. Self-limiting synthesis of AuPd coreshell nanocrystals with a near surface alloy and monolayer Pd shell structure and their superior catalytic activity on the conversion of hexavalent chromium[J]. Applied Catalysis B: Environmental,2019,253:263-270.
APA	X.Li.,C.Li.,D.Xiang.,C.Zhang.,L.Xia.,...&X.Xie.(2019).Self-limiting synthesis of AuPd coreshell nanocrystals with a near surface alloy and monolayer Pd shell structure and their superior catalytic activity on the conversion of hexavalent chromium.Applied Catalysis B: Environmental,253,263-270.
MLA	X.Li,et al."Self-limiting synthesis of AuPd coreshell nanocrystals with a near surface alloy and monolayer Pd shell structure and their superior catalytic activity on the conversion of hexavalent chromium".Applied Catalysis B: Environmental 253(2019):263-270.

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