Core–shell PdPb@Pd aerogels with multiply-twinned intermetallic nanostructures: facile synthesis with accelerated gelation kinetics and their enhanced electrocatalytic properties
Abstract
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.
- Authors:
-
[1];
[2];
[2];
[3];
[4];
[2]
- 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)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1433968
- Alternate Identifier(s):
- OSTI ID: 1434119
- Report Number(s):
- BNL-203501-2018-JAAM
Journal ID: ISSN 2050-7488; JMCAET; TRN: US1802396
- Grant/Contract Number:
- SC0012704; AC05-76RL01830.
- Resource Type:
- Accepted Manuscript
- 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:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Electrocatalysis; Aerogel; Nanostructure; PdPb@Pd
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. https://doi.org/10.1039/C7TA11233E
Zhu, Chengzhou, Shi, Qiurong, Fu, Shaofang, Song, Junhua, Du, Dan, Su, Dong, Engelhard, Mark H., and Lin, Yuehe. Wed .
"Core–shell PdPb@Pd aerogels with multiply-twinned intermetallic nanostructures: facile synthesis with accelerated gelation kinetics and their enhanced electrocatalytic properties". United States. https://doi.org/10.1039/C7TA11233E. https://www.osti.gov/servlets/purl/1433968.
@article{osti_1433968,
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 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.},
doi = {10.1039/C7TA11233E},
journal = {Journal of Materials Chemistry. A},
number = 17,
volume = 6,
place = {United States},
year = {Wed Apr 04 00:00:00 EDT 2018},
month = {Wed Apr 04 00:00:00 EDT 2018}
}
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Cited by: 49 works
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Figures / Tables:
Fig. 1: (a) Schematic illustration of the synthesis of multiply-twinned PdPb@Pd aerogels. Digital pictures of the multiply-twinned Pd3Pb1@Pd hydrogels (b) and the resultant aerogels (Inset in (c)). SEM (c) and TEM (d, e) images of multiply-twinned Pd3Pb1@Pd aerogels. Inset in (d) shows a SAED pattern.
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