Issue 11, 2022

Catalytic conversion of NO and CO into N2 and CO2 by rhodium–aluminum oxides in the gas phase

Abstract

The increasingly stringent emission regulations make it urgent to get a fundamental understanding on the catalytic behaviors of rhodium, the most efficient component in three-way catalysts (TWCs) to convert NOx into N2. Herein, the catalytic conversion of NO and CO into N2 and CO2 by gas-phase rhodium-aluminum oxide species (RhAlO0–3 and RhAl2O1–4) was identified by mass spectrometry and quantum chemical calculations. This finding represents a significant step in the field of gas-phase catalysis, given that only elementary reactions for this conversion are commonly observed because it is extremely challenging to rupture the strong N–O bond and couple the N–N bond as well as drive the resulting product to oxidize CO. It emphasized that a polarized Rh–Al bond in gas-phase species is indispensable and the RhAlO0,1 and RhAl2O1,2 species with direct Rh–Al bonding can be involved in catalytic NO reduction by CO.

Graphical abstract: Catalytic conversion of NO and CO into N2 and CO2 by rhodium–aluminum oxides in the gas phase

Supplementary files

Article information

Article type
Paper
Submitted
10 Jūn. 2021
Accepted
13 Sept. 2021
First published
14 Sept. 2021

J. Mater. Chem. A, 2022,10, 6031-6037

Catalytic conversion of NO and CO into N2 and CO2 by rhodium–aluminum oxides in the gas phase

J. Chen, X. Li, L. Mou, Q. Liu and S. He, J. Mater. Chem. A, 2022, 10, 6031 DOI: 10.1039/D1TA04911A

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