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Issue 18, 2018
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Morphology controlled graphene–alloy nanoparticle hybrids with tunable carbon monoxide conversion to carbon dioxide

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Abstract

Selective oxidation of CO to CO2 using metallic or alloy nanoparticles as catalysts can solve two major problems of energy requirements and environmental pollution. Achieving 100% conversion efficiency at a lower temperature is a very important goal. This requires sustained efforts to design and develop novel supported catalysts containing alloy nanoparticles. In this regard, the decoration of nanoalloys with graphene, as a support for the catalyst, can provide a novel structure due to the synergic effect of the nanoalloys and graphene. Here, we demonstrate the effect of nano-PdPt (Palladium–Platinum) alloys having different morphologies on the catalytic efficiency for the selective oxidation of CO. Efforts were made to prepare different morphologies of PdPt alloy nanoparticles with the advantage of tuning the capping agent (PVP – polyvinyl pyrollidone) and decorating them on graphene sheets via the wet-chemical route. The catalytic activity of the G-PdPt hybrids with an urchin-like morphology has been found to be superior (higher % conversion at 135 °C lower) to that with a nanoflower morphology. The above experimental observations are further supported by molecular dynamics (MD) simulations.

Graphical abstract: Morphology controlled graphene–alloy nanoparticle hybrids with tunable carbon monoxide conversion to carbon dioxide

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Publication details

The article was received on 28 Dec 2017, accepted on 07 Apr 2018 and first published on 09 Apr 2018


Article type: Paper
DOI: 10.1039/C7NR09688G
Citation: Nanoscale, 2018,10, 8840-8850
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    Morphology controlled graphene–alloy nanoparticle hybrids with tunable carbon monoxide conversion to carbon dioxide

    M. M. Devi, N. Dolai, S. Sreehala, Y. M. Jaques, R. S. K. Mishra, D. S. Galvao, C. S. Tiwary, S. Sharma and K. Biswas, Nanoscale, 2018, 10, 8840
    DOI: 10.1039/C7NR09688G

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