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Title: Core–shell PdPb@Pd aerogels with multiply-twinned intermetallic nanostructures: facile synthesis with accelerated gelation kinetics and their enhanced electrocatalytic properties

Abstract

Delicately engineering the well-defined noble metal aerogels with favorable structural and compositional features is of vital importance for wide applications. Here, we reported one-pot and facile method for synthesizing core-shell PdPb@Pd hydrogels/aerogels with multiply-twinned grains and ordered intermetallic phase using sodium hypophosphite as a multifunctional reducing agent. Due to the accelerated gelation kinetics induced by increased reaction temperature and specific function of sodium hypophosphite, the formation of hydrogels can be completed within 4 hrs, far faster than the previous reports. Owe to their unique porous structure and favorable geometric and electronic effects, the optimized PdPb@Pd aerogels exhibit enhanced electrochemical performance towards ethylene glycol oxidation with a mass activity of 5.8 times higher than Pd black.Core–shell PdPb@Pd aerogels with multiply-twinned grains and an ordered intermetallic phase was synthesized, which exhibited good electrocatalytic activity towards ethanol oxidation.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [2];  [1]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [2]
  1. School of Mechanical and Materials Engineering; Washington State University; Pullman; USA; Key Laboratory of Pesticide and Chemical Biology
  2. School of Mechanical and Materials Engineering; Washington State University; Pullman; USA
  3. Center for Functional Nanomaterials; Brookhaven National Laboratory; USA
  4. Environmental Molecular Science Laboratory; Pacific Northwest National Laboratory; Richland; USA
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1439031
Report Number(s):
PNNL-SA-126185
Journal ID: ISSN 2050-7488; JMCAET; 48877; KP1704020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 6; Journal Issue: 17; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Zhu, Chengzhou, Shi, Qiurong, Fu, Shaofang, Song, Junhua, Du, Dan, Su, Dong, Engelhard, Mark H., and Lin, Yuehe. Core–shell PdPb@Pd aerogels with multiply-twinned intermetallic nanostructures: facile synthesis with accelerated gelation kinetics and their enhanced electrocatalytic properties. United States: N. p., 2018. Web. doi:10.1039/c7ta11233e.
Zhu, Chengzhou, Shi, Qiurong, Fu, Shaofang, Song, Junhua, Du, Dan, Su, Dong, Engelhard, Mark H., & Lin, Yuehe. Core–shell PdPb@Pd aerogels with multiply-twinned intermetallic nanostructures: facile synthesis with accelerated gelation kinetics and their enhanced electrocatalytic properties. United States. doi:10.1039/c7ta11233e.
Zhu, Chengzhou, Shi, Qiurong, Fu, Shaofang, Song, Junhua, Du, Dan, Su, Dong, Engelhard, Mark H., and Lin, Yuehe. Mon . "Core–shell PdPb@Pd aerogels with multiply-twinned intermetallic nanostructures: facile synthesis with accelerated gelation kinetics and their enhanced electrocatalytic properties". United States. doi:10.1039/c7ta11233e.
@article{osti_1439031,
title = {Core–shell PdPb@Pd aerogels with multiply-twinned intermetallic nanostructures: facile synthesis with accelerated gelation kinetics and their enhanced electrocatalytic properties},
author = {Zhu, Chengzhou and Shi, Qiurong and Fu, Shaofang and Song, Junhua and Du, Dan and Su, Dong and Engelhard, Mark H. and Lin, Yuehe},
abstractNote = {Delicately engineering the well-defined noble metal aerogels with favorable structural and compositional features is of vital importance for wide applications. Here, we reported one-pot and facile method for synthesizing core-shell PdPb@Pd hydrogels/aerogels with multiply-twinned grains and ordered intermetallic phase using sodium hypophosphite as a multifunctional reducing agent. Due to the accelerated gelation kinetics induced by increased reaction temperature and specific function of sodium hypophosphite, the formation of hydrogels can be completed within 4 hrs, far faster than the previous reports. Owe to their unique porous structure and favorable geometric and electronic effects, the optimized PdPb@Pd aerogels exhibit enhanced electrochemical performance towards ethylene glycol oxidation with a mass activity of 5.8 times higher than Pd black.Core–shell PdPb@Pd aerogels with multiply-twinned grains and an ordered intermetallic phase was synthesized, which exhibited good electrocatalytic activity towards ethanol oxidation.},
doi = {10.1039/c7ta11233e},
journal = {Journal of Materials Chemistry. A},
issn = {2050-7488},
number = 17,
volume = 6,
place = {United States},
year = {2018},
month = {1}
}

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