skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Designing Efficient Catalysts through Bimetallic Architecture: Rh@Pt Nanocubes as a Case Study

Abstract

Bimetallic nanocatalysts often have increased activities and stabilities over their monometallic counterparts due to surface strain effects and electron transfer between the two metals. We demonstrate that the performance of a nanocatalyst can be precisely manipulated in shape-controlled nanocrystals through a bimetallic core@shell architecture. This ability is achieved in a model core@shell Rh@Pt nanocube system through control of shell thickness. The enhanced performance with thin-shelled nanocrystals is correlated with the weakening of surface–adsorbate interactions. In these thin-shelled Rh@Pt nanocubes, the maximum current density achieved during formic acid oxidation was over 2 times greater than that achieved with similarly sized Pt nanocubes, with a decreased CO poisoning ratio as well. Finally, the strategy employed here should also enhance the performance of many other bimetallic nanomaterials composed of more cost-effective metals too.

Authors:
 [1];  [1];  [2];  [1]; ORCiD logo [1]
  1. Indiana Univ., Bloomington, IN (United States). Dept. of Chemistry
  2. Rockhurst Univ., Kansas City, MO (United States). Dept. of Chemistry
Publication Date:
Research Org.:
Indiana Univ., Bloomington, IN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1482343
Alternate Identifier(s):
OSTI ID: 1377949
Grant/Contract Number:  
SC0010489; CHE-1048613; DMR-1126394
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ChemNanoMat
Additional Journal Information:
Journal Volume: 3; Journal Issue: 11; Journal ID: ISSN 2199-692X
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; bimetallic nanoparticles; formic acid oxidation; platinum; rhodium; Sabatier principle

Citation Formats

Harak, Ethan W., Koczkur, Kallum M., Harak, Dale W., Patton, Paul, and Skrabalak, Sara E. Designing Efficient Catalysts through Bimetallic Architecture: Rh@Pt Nanocubes as a Case Study. United States: N. p., 2017. Web. doi:10.1002/cnma.201700167.
Harak, Ethan W., Koczkur, Kallum M., Harak, Dale W., Patton, Paul, & Skrabalak, Sara E. Designing Efficient Catalysts through Bimetallic Architecture: Rh@Pt Nanocubes as a Case Study. United States. doi:10.1002/cnma.201700167.
Harak, Ethan W., Koczkur, Kallum M., Harak, Dale W., Patton, Paul, and Skrabalak, Sara E. Wed . "Designing Efficient Catalysts through Bimetallic Architecture: Rh@Pt Nanocubes as a Case Study". United States. doi:10.1002/cnma.201700167. https://www.osti.gov/servlets/purl/1482343.
@article{osti_1482343,
title = {Designing Efficient Catalysts through Bimetallic Architecture: Rh@Pt Nanocubes as a Case Study},
author = {Harak, Ethan W. and Koczkur, Kallum M. and Harak, Dale W. and Patton, Paul and Skrabalak, Sara E.},
abstractNote = {Bimetallic nanocatalysts often have increased activities and stabilities over their monometallic counterparts due to surface strain effects and electron transfer between the two metals. We demonstrate that the performance of a nanocatalyst can be precisely manipulated in shape-controlled nanocrystals through a bimetallic core@shell architecture. This ability is achieved in a model core@shell Rh@Pt nanocube system through control of shell thickness. The enhanced performance with thin-shelled nanocrystals is correlated with the weakening of surface–adsorbate interactions. In these thin-shelled Rh@Pt nanocubes, the maximum current density achieved during formic acid oxidation was over 2 times greater than that achieved with similarly sized Pt nanocubes, with a decreased CO poisoning ratio as well. Finally, the strategy employed here should also enhance the performance of many other bimetallic nanomaterials composed of more cost-effective metals too.},
doi = {10.1002/cnma.201700167},
journal = {ChemNanoMat},
issn = {2199-692X},
number = 11,
volume = 3,
place = {United States},
year = {2017},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Ru–Pt core–shell nanoparticles for preferential oxidation of carbon monoxide in hydrogen
journal, March 2008

  • Alayoglu, Selim; Nilekar, Anand U.; Mavrikakis, Manos
  • Nature Materials, Vol. 7, Issue 4, p. 333-338
  • DOI: 10.1038/nmat2156

Effect of Pd Nanoparticle Size on the Catalytic Hydrogenation of Allyl Alcohol
journal, April 2006

  • Wilson, Orla M.; Knecht, Marc R.; Garcia-Martinez, Joaquin C.
  • Journal of the American Chemical Society, Vol. 128, Issue 14, p. 4510-4511
  • DOI: 10.1021/ja058217m

Preferential CO Oxidation in Hydrogen: Reactivity of Core−Shell Nanoparticles
journal, June 2010

  • Nilekar, Anand Udaykumar; Alayoglu, Selim; Eichhorn, Bryan
  • Journal of the American Chemical Society, Vol. 132, Issue 21, p. 7418-7428
  • DOI: 10.1021/ja101108w

Nanocrystalline intermetallics on mesoporous carbon for direct formic acid fuel cell anodes
journal, February 2010

  • Ji, Xiulei; Lee, Kyu Tae; Holden, Reanne
  • Nature Chemistry, Vol. 2, Issue 4, p. 286-293
  • DOI: 10.1038/nchem.553

Towards the computational design of solid catalysts
journal, April 2009

  • Nørskov, J.; Bligaard, T.; Rossmeisl, J.
  • Nature Chemistry, Vol. 1, Issue 1, p. 37-46
  • DOI: 10.1038/nchem.121