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Title: Rapid Synthesis of Rhodium-Palladium Alloy Nanocatalysts

Abstract

The chemistry of metastable RhPd alloys is not well understood, and well‐characterized nanoparticle (NP) examples remain rare. Well‐defined and near‐monodisperse RhPd NPs were prepared in a simple one‐pot approach by using microwave‐assisted or conventional heating in reaction times as short as 30 s. The catalytic hydrogenation activity of supported RhPd NP catalysts revealed that short synthesis times resulted in the most‐active and most‐stable hydrogenation catalysts, whereas longer synthesis times promoted partial Rh‐Pd core–shell segregation. Relative to Rh NPs, RhPd NPs resisted deactivation over longer reaction times. Density functional theory (DFT) was employed to estimate the binding energies of H and alkenes on (1 1 1) Rh, Pd, and Rh0.5Pd0.5 surfaces. The DFT results concurred with experiment and concluded that the alkene hydrogenation activity trend was of the order Pd

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. Department of Chemistry, The University of Texas at Austin, 2.204 Welch Hall 105 E. 24th St. Stop A5300 Austin TX 78712 USA
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE
OSTI Identifier:
1543478
Resource Type:
Accepted Manuscript
Journal Name:
ChemCatChem
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 1867-3880
Publisher:
ChemPubSoc Europe
Country of Publication:
United States
Language:
English
Subject:
Chemistry

Citation Formats

Piburn, Graham W., Li, Hao, Kunal, Pranaw, Henkelman, Graeme, and Humphrey, Simon M. Rapid Synthesis of Rhodium-Palladium Alloy Nanocatalysts. United States: N. p., 2017. Web. doi:10.1002/cctc.201701133.
Piburn, Graham W., Li, Hao, Kunal, Pranaw, Henkelman, Graeme, & Humphrey, Simon M. Rapid Synthesis of Rhodium-Palladium Alloy Nanocatalysts. United States. doi:10.1002/cctc.201701133.
Piburn, Graham W., Li, Hao, Kunal, Pranaw, Henkelman, Graeme, and Humphrey, Simon M. Thu . "Rapid Synthesis of Rhodium-Palladium Alloy Nanocatalysts". United States. doi:10.1002/cctc.201701133. https://www.osti.gov/servlets/purl/1543478.
@article{osti_1543478,
title = {Rapid Synthesis of Rhodium-Palladium Alloy Nanocatalysts},
author = {Piburn, Graham W. and Li, Hao and Kunal, Pranaw and Henkelman, Graeme and Humphrey, Simon M.},
abstractNote = {The chemistry of metastable RhPd alloys is not well understood, and well‐characterized nanoparticle (NP) examples remain rare. Well‐defined and near‐monodisperse RhPd NPs were prepared in a simple one‐pot approach by using microwave‐assisted or conventional heating in reaction times as short as 30 s. The catalytic hydrogenation activity of supported RhPd NP catalysts revealed that short synthesis times resulted in the most‐active and most‐stable hydrogenation catalysts, whereas longer synthesis times promoted partial Rh‐Pd core–shell segregation. Relative to Rh NPs, RhPd NPs resisted deactivation over longer reaction times. Density functional theory (DFT) was employed to estimate the binding energies of H and alkenes on (1 1 1) Rh, Pd, and Rh0.5Pd0.5 surfaces. The DFT results concurred with experiment and concluded that the alkene hydrogenation activity trend was of the order Pd},
doi = {10.1002/cctc.201701133},
journal = {ChemCatChem},
number = 1,
volume = 10,
place = {United States},
year = {2017},
month = {9}
}

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Works referenced in this record:

Shape-Controlled Synthesis of Gold and Silver Nanoparticles
journal, December 2002