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Issue 20, 2017
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Pt–CeO2 nanoporous spheres – an excellent catalyst for partial oxidation of methane: effect of the bimodal pore structure

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Abstract

Pt–CeO2 nanoporous spheres were prepared by a two-step synthesis procedure. First, CeO2 nanoporous spheres were prepared by a solvo-thermal method followed by Pt-loading by controlled deposition. The synthesized catalysts were characterized by BET-surface area, H2-chemisorption, XRD, H2-TPR, SEM, TEM, XPS, Raman analysis and EXAFS techniques. The prepared Pt–CeO2NP catalyst showed a bimodal pore structure, which highly influenced its catalytic activity. The catalyst activates methane at 350 °C and was found to be highly active and selective for synthesis gas production via partial oxidation of methane. Pt-nanoparticles of 1.27 nm on average supported on about 150 nm nanoporous spheres comprised of 5–15 nm CeO2 particles were stable for more than 60 h of time-on-stream (TOS) without any significant activity loss, producing synthesis gas with an H2/CO ratio ∼1.95. The high surface area and bimodal pore size distribution played the most important role for the catalyst's superior activity.

Graphical abstract: Pt–CeO2 nanoporous spheres – an excellent catalyst for partial oxidation of methane: effect of the bimodal pore structure

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Publication details

The article was received on 24 Jul 2017, accepted on 12 Sep 2017 and first published on 12 Sep 2017


Article type: Paper
DOI: 10.1039/C7CY01493G
Citation: Catal. Sci. Technol., 2017,7, 4720-4735
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    Pt–CeO2 nanoporous spheres – an excellent catalyst for partial oxidation of methane: effect of the bimodal pore structure

    R. K. Singha, A. Shukla, A. Yadav, T. Sasaki, A. Sandupatla, G. Deo and R. Bal, Catal. Sci. Technol., 2017, 7, 4720
    DOI: 10.1039/C7CY01493G

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