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- W4317821289 abstract "An ideal catalyst that can be used for the selective catalytic reduction (SCR) of NO at low temperature should have a high activity and ability to resist SO2. Herein, Ti-doped Fe2O3 (Ti-Fe2O3) nanoparticles that extraordinarily convert NO (T90, 200 °C) and highly resist SO2 meet this requirement. In the presence of 100 ppm SO2, the optimal Ti-Fe2O3 can convert 90% NO at 220 °C for 24 h. With the addition of Ti4+, the electrons around Fe3+ migrate toward Ti4+, strengthening the electron-deficient tendency of Fe3+. Therefore, electron-donating NH3 is preferentially adsorbed by Fe3+, endowing Ti-Fe2O3 with the ability to resist SO2 and exceptionally tolerate SO2 at low temperature. Besides, based on the strength of the embedded Ti4+, a large number of Brønsted acid sites are converted to Lewis acid sites to speed the reaction rate of SCR below 210 °C. High anti-SO2 capacity and adequate Lewis acid sites maximize the efficiency of Ti-Fe2O3 in reducing NO." @default.
- W4317821289 created "2023-01-24" @default.
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- W4317821289 date "2023-04-01" @default.
- W4317821289 modified "2023-10-12" @default.
- W4317821289 title "Enhancing SO2-shielding effect and Lewis acid sites for high efficiency in low-temperature SCR of NO with NH3: Reinforced electron-deficient extent of Fe3+ enabled by Ti4+ in Fe2O3" @default.
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- W4317821289 doi "https://doi.org/10.1016/j.seppur.2023.123272" @default.
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