Facile synthesis of Pt-Pd alloy nanocages and Pt nanorings by templating with Pd nanoplates

Wang, Xue; Luo, Ming; Huang, Hongwen; Chi, Miaofang; Howe, Jane; Xie, Zhaoxiong; Xia, Younan

doi:10.1002/cnma.201600238

Title: Facile synthesis of Pt-Pd alloy nanocages and Pt nanorings by templating with Pd nanoplates

Journal Article · Tue Sep 06 00:00:00 EDT 2016 · ChemNanoMat

DOI:https://doi.org/10.1002/cnma.201600238· OSTI ID:1326548

Wang, Xue ^[1]; Luo, Ming ^[2]; Huang, Hongwen ^[2]; Chi, Miaofang ^[3]; Howe, Jane ^[4]; Xie, Zhaoxiong ^[5]; Xia, Younan ^[2]

Georgia Inst. of Technology, Atlanta, GA (United States); Emory Univ., Atlanta, GA (United States); Xiamen Univ., Xiamen (People's Republic of China)
Georgia Inst. of Technology, Atlanta, GA (United States); Emory Univ., Atlanta, GA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Hitachi High-Tech. Canada, Toronto, ON (Canada)
Xiamen Univ., Xiamen (People's Republic of China)

We report a facile method for the synthesis of Pt-Pd nanocages and Pt nanorings by conformally coating Pd nanoplates with Pt-based shells using polyol- and water-based protocols, respectively, followed by selective removal of the Pd cores. For the polyol-based system, Pd nanoplates were conformally coated with Pt-Pd alloy shells due to the use of a high reaction temperature of 200 °C and a slow injection rate for the Pt precursor. In comparison, Pt shells were formed on Pd nanoplates (with a larger thickness on the side face than on the top/bottom face) in the water-based system due to the use of a low reaction temperature of 80 °C and the presence of twin boundaries on the side face. As such, the Pd@Pt nanoplates prepared using the polyol- and water-based protocols evolved into Pt-Pd nanocages and Pt nanorings, respectively, when the Pd templates in the cores were selectively removed by wet etching. As a result, the wall thickness of the nanocages and the ridge thickness of the nanorings could be reduced down to 1.1 nm and 1.8 nm, respectively, without breaking the hollow structures.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1326548

Journal Information:: ChemNanoMat, Journal Name: ChemNanoMat; ISSN 2199-692X

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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