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This content will become publicly available on September 6, 2017

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

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.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [2]
  1. Georgia Inst. of Technology, Atlanta, GA (United States); Emory Univ., Atlanta, GA (United States); Xiamen Univ., Xiamen (People's Republic of China)
  2. Georgia Inst. of Technology, Atlanta, GA (United States); Emory Univ., Atlanta, GA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Hitachi High-Tech. Canada, Toronto, ON (Canada)
  5. Xiamen Univ., Xiamen (People's Republic of China)
Publication Date:
OSTI Identifier:
1326548
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
ChemNanoMat
Additional Journal Information:
Journal Name: ChemNanoMat; Journal ID: ISSN 2199-692X
Publisher:
Wiley
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE