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Issue 9, 2018
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Bifunctional CO oxidation over Mn-mullite anchored Pt sub-nanoclusters via atomic layer deposition

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Abstract

CO oxidation is a widely used model system for understanding fundamental aspects of heterogeneous catalysis. While platinum (Pt) continues to be a reference material for CO oxidation catalysis, poisoning of Pt catalysts presents a critical issue that blocks reaction sites and impedes subsequent reaction steps. Fabrication of CO poison-free Pt catalysts remains a great challenge due to its CO-philic nature. Herein, we report a Pt based catalyst to effectively tackle CO poisoning by tightly anchoring Pt sub-nanoclusters onto Mn-mullite oxide (SmMn2O5) via atomic layer deposition. Superior CO oxidation activity has been observed with a significantly lowered light-off temperature and apparent activation energy. In situ diffuse reflectance infrared Fourier transform spectroscopy analysis, oxygen isotope experiments and density functional theory calculations confirm that the low-temperature activity originates from active oxygen atom sources at the bifunctional interface structure.

Graphical abstract: Bifunctional CO oxidation over Mn-mullite anchored Pt sub-nanoclusters via atomic layer deposition

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Publication details

The article was received on 28 Dec 2017, accepted on 26 Jan 2018 and first published on 26 Jan 2018


Article type: Edge Article
DOI: 10.1039/C7SC05486F
Citation: Chem. Sci., 2018,9, 2469-2473
  • Open access: Creative Commons BY license
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    Bifunctional CO oxidation over Mn-mullite anchored Pt sub-nanoclusters via atomic layer deposition

    X. Liu, Y. Tang, M. Shen, W. Li, S. Chu, B. Shan and R. Chen, Chem. Sci., 2018, 9, 2469
    DOI: 10.1039/C7SC05486F

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