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Investigation of the NO removal by CO on CuO–CoOx binary metal oxides supported on Ce0.67Zr0.33O2

Paper ID Volume ID Publish Year Pages File Format Full-Text
47943 46486 2009 10 PDF Available
Title
Investigation of the NO removal by CO on CuO–CoOx binary metal oxides supported on Ce0.67Zr0.33O2
Abstract

Binary metal oxides CuO–CoOx supported on Ce0.67Zr0.33O2 (denoted as CZ, thereafter) catalysts had been characterized by XRD, LRS, UV-DRS, IR, TPR, in situ FT-IR and activity test for the removal of NO by CO. Results suggested that (1) both copper oxide and cobalt oxide (loadings ≤0.5 and 0.32 mmol/100 m2 CZ, respectively) were highly dispersed on CZ support; (2) the addition of cobalt species promoted the reduction of the dispersed copper oxide, and improved the activity of copper oxide supported on CZ due to the strong interaction between active copper oxide and cobalt oxide, which was dependent on the preparation procedure and the cobalt oxide content; (3) the reduction of NO by CO over these catalysts went through different mechanisms at low and high temperatures, which was related to the change of the active species during the reaction process; (4) the introduction of cobalt oxide altered the adsorption type of NO and CO on these catalysts, and oxidized the NO dimers into ionic NO3−1. A possible reaction mechanism was proposed to discuss the NO + CO reaction based on all these results.

Keywords
CuO–CoOx-CZ catalysts; In situ FT-IR; Interaction; Nitrates
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Investigation of the NO removal by CO on CuO–CoOx binary metal oxides supported on Ce0.67Zr0.33O2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 90, Issues 1–2, 25 July 2009, Pages 105–114
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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