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Nanomaterials 2018, 8(8), 620; https://doi.org/10.3390/nano8080620

Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3

1
Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China
2
State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
*
Authors to whom correspondence should be addressed.
Received: 21 June 2018 / Revised: 9 August 2018 / Accepted: 10 August 2018 / Published: 15 August 2018
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Abstract

A two-dimensional MnAl-layered double oxide (LDO) was obtained by flash nanoprecipitation method (FNP) and used for the selective catalytic reduction of NOx with NH3. The MnAl-LDO (FNP) catalyst formed a particle size of 114.9 nm. Further characterization exhibited rich oxygen vacancies and strong redox property to promote the catalytic activity at low temperature. The MnAl-LDO (FNP) catalyst performed excellent NO conversion above 80% at the temperature range of 100–400 °C, and N2 selectivity above 90% below 200 °C, with a gas hourly space velocity (GHSV) of 60,000 h−1, and a NO concentration of 500 ppm. The maximum NO conversion is 100% at 200 °C; when the temperature in 150–250 °C, the NO conversion can also reach 95%. The remarkable low-temperature catalytic performance of the MnAl-LDO (FNP) catalyst presented potential applications for controlling NO emissions on the account of the presentation of oxygen vacancies. View Full-Text
Keywords: layered double oxide; oxygen vacancies; selective catalytic reduction; low-temperature denitration; flash nanoprecipitation layered double oxide; oxygen vacancies; selective catalytic reduction; low-temperature denitration; flash nanoprecipitation
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Zhao, D.; Wang, C.; Yu, F.; Shi, Y.; Cao, P.; Dan, J.; Chen, K.; Lv, Y.; Guo, X.; Dai, B. Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3. Nanomaterials 2018, 8, 620.

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