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Cu–Pd Single-Atom Alloy Catalyst for Highly Efficient NO reduction

Abstract

A series of Cu–Pd alloy nanoparticles supported on Al2O3 were prepared and tested as catalysts for deNOx reactions. XRD, HAADF-STEM, XAFS, and FT-IR analyses revealed that a single-atom alloy structure was formed when the Cu/Pd ratio was 5, where Pd atoms were well isolated by Cu atoms. Compared with Pd/Al2O3, Cu5Pd/Al2O3 exhibited outstanding catalytic activity and N2 selectivity in the reduction of NO by CO: for the first time, the complete conversion of NO to N2 was achieved even at 175°C, with long-term stability for at least 30 h. High catalytic performance was also attained in the presence of O2 and C3H6 (model exhaust gas), where a 90% decrease in Pd use was achieved with minimum evolution of N2O. Kinetic and DFT studies demonstrated that N–O bond breaking of (NO)2 dimer was the rate-determining step and was kinetically promoted by the isolated Pd.

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Publication details

The article was received on 27 Jun 2019, accepted on 05 Aug 2019 and first published on 05 Aug 2019


Article type: Edge Article
DOI: 10.1039/C9SC03172C
Chem. Sci., 2019, Accepted Manuscript
  • Open access: Creative Commons BY license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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    Cu–Pd Single-Atom Alloy Catalyst for Highly Efficient NO reduction

    F. Xing, J. Jeon, T. Toyao, K. Shimizu and S. Furukawa, Chem. Sci., 2019, Accepted Manuscript , DOI: 10.1039/C9SC03172C

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