NO adsorption during lean-rich cycles on Pt–Ba/γ-Al2O3 traps in a gas stream simulating the exhaust of gasoline engines

Morales-Pérez, Ariadna A.; Martínez-Hernández, Angel; Fuentes, Gustavo A.

doi:10.1007/s10450-015-9718-0

Cited by 3 publications

(2 citation statements)

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“…The release of pollutants from industries and other resources have increased the environmental problems. , The most noticeable contaminants are nitrogen oxides (NO, NO 2 , and N 2 O) which are mostly generated from combustion of fuel that contributes to the photochemical smog, acid rain formation, depletion of the ozone, and greenhouse effects. , Mostly, fuel combustion contains 95% NO and 5% NO 2 . NO is a hazardous gas which has an adverse effect on atmosphere, human respiratory system, and ecosystem. , Therefore, it is substantial to enterprise catalytic techniques to reduce or remove NO molecules from the atmosphere. − In recent years, it is proved computationally and experimentally that the single metal atoms effectively anchored and stabilized on a suitable metal oxide surface or another metal supports for catalysis.…”

Section: Introductionmentioning

confidence: 99%

“…The release of pollutants from industries and other resources have increased the environmental problems. 1,2 The most noticeable contaminants are nitrogen oxides (NO, NO 2 , and N 2 O) which are mostly generated from combustion of fuel that contributes to the photochemical smog, acid rain formation, depletion of the ozone, and greenhouse effects. 3,4 Mostly, fuel combustion contains 95% NO and 5% NO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Chromium Single-Atom Catalyst with Graphyne Support: A Theoretical Study of NO Oxidation and Reduction

et al. 2020

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Catalytic mechanisms and bonding analysis of NO oxidation and reduction on Cr single-atom catalysts (SAC) dispersed on the graphyne (GY) surface have been systematically investigated using the first-principles theoretical methods. GY is a decent support for isolated transition-metal (TM) atom catalysts because the most active sp-hybridized carbon atoms exist on the GY surface. All the single TM atoms are trapped into the void of the GY surface and existed in the isolated form. The molecular geometries and adsorbate binding energies of NO@TM–GY, ON@TM–GY, and O2@TM–GY configurations are determined. We find that the Cr–GY is the most promising SAC for NO oxidation and reduction compared with the other TM-SACs. Herein, we report an efficient NO oxidation and reduction catalyzed by Cr–GY at ambient temperature. We find that Cr–GY SAC is very reactive for NO oxidation and reduction at ambient temperatures with low activation barriers to the rate-determining steps for Eley–Rideal (0.87, 0.60, and 0.62 eV) and Langmuir–Hinshelwood (0.69, 0.62, and 0.84 eV) mechanisms. The Termolecular Eley–Rideal mechanism for the formation of the NO2 molecule is not thermodynamically favorable. Comparative analysis revealed that the NO reduction (0.62 eV) is more favorable than NO oxidation (0.84 eV). These findings provide valuable perceptions for design of highly efficient and selective heterogeneous SACs for NO oxidation and reduction with TMs.

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