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

Journal Article · · ChemNanoMat

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. Here, 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. The strategy employed here should also enhance the performance of many other bimetallic nanomaterials composed of more cost‐effective metals too.

Research Organization:
Indiana Univ., Bloomington, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0010489; CHE-1048613; DMR-1126394
OSTI ID:
1482343
Alternate ID(s):
OSTI ID: 1377949
Journal Information:
ChemNanoMat, Vol. 3, Issue 11; ISSN 2199-692X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Screening of Catalysts for the Electrochemical Oxidation of Organic Fuels in A Multi-Anode Proton Exchange Membrane Cell journal January 2019

Figures / Tables (4)