Issue 36, 2019

A 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 obtained 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 the (NO)2 dimer was the rate-determining step and was kinetically promoted by the isolated Pd.

Graphical abstract: A Cu–Pd single-atom alloy catalyst for highly efficient NO reduction

Supplementary files

Article information

Article type
Edge Article
Submitted
27 Jun 2019
Accepted
05 Aug 2019
First published
05 Aug 2019
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2019,10, 8292-8298

A 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, 10, 8292 DOI: 10.1039/C9SC03172C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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