1. Catalytic conversion of NO and CO into N2 and CO2 by rhodium–aluminum oxides in the gas phase
- Author
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Li-Hui Mou, Qing-Yu Liu, Xiao-Na Li, Jiao-Jiao Chen, and Sheng-Gui He
- Subjects
Materials science ,Renewable Energy, Sustainability and the Environment ,Component (thermodynamics) ,Oxide ,chemistry.chemical_element ,General Chemistry ,Photochemistry ,Mass spectrometry ,Rhodium ,Catalysis ,chemistry.chemical_compound ,chemistry ,Aluminium ,Elementary reaction ,General Materials Science ,NOx - 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.
- Published
- 2022