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Article Abstract
Simultaneous oxidation of soot and CH emitted from natural gas-diesel dual fuel engine is a new challenge. Herein, a robust catalyst of binary Ru-Pd components supported on three-dimensional ordered macro-mesoporous cerium-zirconium oxide (RuPd/3DOMM-CZO) is elaborately constructed. Ordered macro-mesopore structure in novel hierarchical porous cerium-zirconium oxide can respectively enhance mass transfer of soot and gaseous reactants, and binary Ru-Pd active components can improve activation for NO and CH. RuPd/3DOMM-CZO catalyst exhibits excellent catalytic performance and stability during simultaneous soot and CH oxidation. Based on the results of characterizations and theoretical calculations, Ru site in binary Ru-Pd components is responsible for catalyzing NO oxidation to NO, which is key step of NO-assisted soot oxidation mechanism, while Pd site can activate the C-H bond of CH for boosting oxidation to CO; the catalytic cooperation between Ru and Pd atoms can promote the rate-determining step to realize simultaneous oxidation of soot and CH.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12371115 | PMC |
| http://dx.doi.org/10.1038/s41467-025-63089-8 | DOI Listing |
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