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- W3096244763 abstract "One of the most important features of the three-way catalysts is their long-term stability. However, quite often, promising catalytic compositions with excellent activity become deactivated after a relatively short period of exploitation due to various reasons. Therefore, a study on the onboard regeneration of the deactivated three-way catalysts remains its actuality. The present work is mainly focused on the self-regeneration effect of the rhodium-containing component. Aging of the catalysts in the standard and model engine braking regimes revealed the difference in the catalytic performance. Deactivated rhodium species turned to the active state as a result of rapid cooling in air flow from 1200 to 600 °C. The regenerated catalyst shows improved activity towards NOx reduction and, therefore, widened operation window, which indicates higher accessibility of the rhodium species. X-ray diffraction analysis of the aged catalysts does not reveal any noticeable phase changes. Contrary, significant changes in the Rh oxidation state were registered by X-ray photoelectron spectroscopy. The observed effect opens new horizons for the development of the onboard purification systems with prolonged exploitation lifetime." @default.
- W3096244763 created "2020-11-09" @default.
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- W3096244763 date "2020-10-30" @default.
- W3096244763 modified "2023-10-18" @default.
- W3096244763 title "Self-Regeneration Effect of Three-Way Catalysts during Thermal Aging Procedure" @default.
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- W3096244763 doi "https://doi.org/10.3390/catal10111257" @default.
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