PdCu Alloy Catalyst for Inhibition‐free, Low‐temperature CO Oxidation

Song, Yuying; Svadlenak, Scott; Bathena, Tanmayi; Hazlett, Melanie J.; Epling, William S.; Goulas, Konstantinos A.; Grabow, Lars C.

doi:10.1002/cctc.202301024

Title: PdCu Alloy Catalyst for Inhibition‐free, Low‐temperature CO Oxidation

Journal Article · 12 November 2023 · ChemCatChem

DOI: https://doi.org/10.1002/cctc.202301024 · OSTI ID:2281266

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William A. Brookshire Department of Chemical and Biomolecular Engineering University of Houston Houston TX-77204-4004 USA
School of Chemical Biological and Environmental Engineering Oregon State University Corvallis OR-97331 USA
Department of Chemical and Materials Engineering Concordia University Montreal QC-H4B1R6 Canada
Department of Chemical Engineering University of Virginia Charlottesville VA-22904 USA
William A. Brookshire Department of Chemical and Biomolecular Engineering University of Houston Houston TX-77204-4004 USA, Texas Center for Superconductivity at the University of Houston (TcSUH) Houston TX-77204-4004 USA

Abstract Designing robust catalysts for low‐temperature oxidation is pertinent to the development of advanced combustion engines to meet increasingly stringent emissions limitations. Oxidation of CO, hydrocarbon, and NO pollutants over platinum‐group catalysts suffer from strong inhibition due to their competitive adsorption, while coinage metals are generally slow at activating O ₂ . Through computational screening, we discovered a PdCu alloy catalyst that completely oxidizes CO below 150 °C without inhibition by NO, propylene or water. This is attributed primarily to geometric effects and the presence of CO bound to Pd sites within the Cu‐rich surface of the PdCu alloy. We demonstrate that the novel PdCu catalyst can be used in tandem with a PtPd catalyst to achieve sequential, inhibition‐free, complete oxidation of CO in a two‐bed system, while also achieving 50 % NO conversion below 120 °C. Moreover, neither water nor propylene adversely affect the low temperature CO oxidation activity.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: EE0008233; AC02-06CH11357; AC02-05CH11231; AC02-76SF00515

OSTI ID:: 2281266

Journal Information:: ChemCatChem, Journal Name: ChemCatChem Journal Issue: 1 Vol. 16; ISSN 1867-3880

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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