Jain, Noopur and Roy, Ahin (2020) Phase & morphology engineered surface reducibility of MnO2 nano-heterostructures: Implications on catalytic activity towards CO oxidation. In: MATERIALS RESEARCH BULLETIN, 121 .
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Abstract
An understanding of the surface reducibility of a catalytically active oxide support is a pre-requisite to understanding its catalytic behavior. In this work, we report that through a stringent control over the phase and morphology of catalytically active MnO2 supports, a control over the surface reducibility can be achieved. Through temperature-programmed reduction (TPR), we prove a higher availability of lattice oxygen for the alpha-MnO2 phase, compared to that of beta-MnO2. Furthermore, by modifying the synthesis method, we could engineer the morphology of the alpha-phase into nanoflowers which in turn leads to a higher surface area, further enhancing the activity. On the engineered support, decoration of Pt nanoparticles can lower the full conversion temperature for CO oxidation at a considerably low temperature.
Item Type: | Journal Article |
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Publication: | MATERIALS RESEARCH BULLETIN |
Publisher: | PERGAMON-ELSEVIER SCIENCE LTD |
Additional Information: | copy riht of this article belong to PERGAMON-ELSEVIER SCIENCE LTD |
Keywords: | Phase; Morphology; MnO2; CO oxidation; Surface reducibility |
Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
Date Deposited: | 10 Dec 2019 05:03 |
Last Modified: | 10 Dec 2019 05:03 |
URI: | http://eprints.iisc.ac.in/id/eprint/63914 |
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