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Reduced SrTiO3-Supported Pt-Cu Alloy Nanoparticles for Preferential Oxidation of CO in Excess Hydrogen

preprint
submitted on 01.05.2019 and posted on 02.05.2019 by Noopur Jain, ahin roy, Sreejith Nair

In this work, we employ Pt-Cu alloy nanoparticles supported on reduced-SrTiO3 (RSTO) to obtain a poisoning-resistant catalyst in the desired operative temperature range. The changing Cu concentration in the Pt-Cu bimetallic alloy elucidates the trend of changing efficiency, selectivity and stability of CO conversion over the bimetallic catalyst. Among the various compositions, we find that Pt40Cu60­ is the most effective catalyst to target CO oxidation by competing with the the undesirable H2 oxidation. Here, we report interesting results on the trade-off between the selectivity of CO conversion as well as the maximum CO conversion (%) over the catalyst. The difference in CO adsorption over monometallic Pt and bimetallic Pt-Cu catalysts is well-reflected by the controlled adsorption-desorption studies.

History

Email Address of Submitting Author

nj11189@gmail.com

Institution

Indian Institute of Science

Country

India

ORCID For Submitting Author

0000-0003-4934-9070

Declaration of Conflict of Interest

Authors declare no confict of interest

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