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

Zhu, Chengzhou; Shi, Qiurong; Fu, Shaofang; Song, Junhua; Du, Dan; Su, Dong; Engelhard, Mark H.; Lin, Yuehe

doi:10.1039/C7TA11233E

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

Journal Article · 03 April 2018 · Journal of Materials Chemistry. A

DOI: https://doi.org/10.1039/C7TA11233E · OSTI ID:1433968

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^[2]; Song, Junhua ^[2]; Du, Dan ^[1];

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Washington State Univ., Pullman, WA (United States); Central China Normal Univ., Wuhan (People's Republic of China)
Washington State Univ., Pullman, WA (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Delicately engineering well-defined noble metal aerogels with favorable structural and compositional features is of vital importance for wide applications. Here, we reported a one-pot and facile method for synthesizing core–shell PdPb@Pd hydrogels/aerogels with multiply-twinned grains and an ordered intermetallic phase using sodium hypophosphite as a multifunctional reducing agent. Due to the accelerated gelation kinetics induced by increased reaction temperature and the specific function of sodium hypophosphite, the formation of hydrogels can be completed within 4 h. As a result, owing 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.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC05-76RL01830; SC0012704

OSTI ID:: 1433968

Report Number(s):: BNL--203501-2018-JAAM

Journal Information:: Journal of Materials Chemistry. A, Journal Name: Journal of Materials Chemistry. A Journal Issue: 17 Vol. 6; ISSN JMCAET; ISSN 2050-7488

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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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

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