Dendritic porous yolk@ordered mesoporous shell structured heterogeneous nanocatalysts with enhanced stability

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Dendritic porous yolk@ordered mesoporous shell structured heterogeneous nanocatalysts with enhanced stability
	Luan, Yi; Du, Xin; Zhao, Caixia; Zhang, Changbin; Jaroniec, Mietek; Huang, Hongwei; Zhang, Xueji; Qiao, Shi-Zhang
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2017-05-16
卷号	5 期号:40 页码:21560-21569
英文摘要	One of the major challenges in heterogeneous catalysis is how to suppress the aggregation of thermodynamically unstable noble metal nanoparticles (NPs) and simultaneously maintain their high accessibility. Here we report the fabrication of integrated functional nanostructures consisting of a dendritic porous silica yolk with many small noble metal NPs and a protective mesoporous silica shell (MSS) with perpendicularly aligned pore channels and tunable shell thickness by using a well-controlled interfacial engineering strategy. Three-dimensional (3D) dendrimer-like superstructures with many permeable center-radial large pore channels and a highly accessible internal surface area, named dendritic porous silica spheres (DPSSs), serve as unique yolks not only because of their capability to accommodate high density ultrafine Au or Pt NPs, but also their functionality to act as robust physical barriers to separate and confine the aforementioned loaded NPs, which result in slowing down their aggregation at high temperatures due to Ostwald ripening. These integrated hierarchical structures also ensure good stability under weak basic and acidic conditions. Due to their superior structural properties, the DPSSs@noble metal NPs@MSS yolk-shell structures exhibit excellent catalytic performance in p-nitrophenol reduction, epoxidationreaction and CO oxidation. The favorable stability and high catalytic performance of these yolk-shell structures make the developed design strategy very useful for the fabrication of novel highly active and stable catalysts.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39284]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Luan, Yi,Du, Xin,Zhao, Caixia,et al. Dendritic porous yolk@ordered mesoporous shell structured heterogeneous nanocatalysts with enhanced stability[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(40):21560-21569.
APA	Luan, Yi.,Du, Xin.,Zhao, Caixia.,Zhang, Changbin.,Jaroniec, Mietek.,...&Qiao, Shi-Zhang.(2017).Dendritic porous yolk@ordered mesoporous shell structured heterogeneous nanocatalysts with enhanced stability.JOURNAL OF MATERIALS CHEMISTRY A,5(40),21560-21569.
MLA	Luan, Yi,et al."Dendritic porous yolk@ordered mesoporous shell structured heterogeneous nanocatalysts with enhanced stability".JOURNAL OF MATERIALS CHEMISTRY A 5.40(2017):21560-21569.