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首页> 外文期刊>Nanomaterials >Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NO x with NH 3
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Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NO x with NH 3

机译：通过快速纳米沉淀制备的二维MnAl层状双氧化物中增强的氧空位提供了NH 3与NH 3的高选择性催化还原

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A two-dimensional MnAl-layered double oxide (LDO) was obtained by flash nanoprecipitation method (FNP) and used for the selective catalytic reduction of NO x with NH 3 . 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 N 2 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.
机译：通过快速纳米沉淀法（FNP）获得了二维的MnAl层状双氧化物（LDO），并用于NH 3选择性催化还原NO x。 MnAl-LDO（FNP）催化剂的粒径为114.9 nm。进一步的表征显示出丰富的氧空位和强的氧化还原性质，以促进低温下的催化活性。 MnAl-LDO（FNP）催化剂在100–400°C的温度范围内表现出卓越的NO转化率，高于80％，在200°C以下，N 2的选择性高于90％，气体时空速（GHSV）为60,000 h α1，且NO浓度为500ppm。在200°C下，最大NO转化率为100％;当温度在150–250°C时，NO转化率也可以达到95％。由于存在氧空位，MnAl-LDO（FNP）催化剂出色的低温催化性能为控制NO排放提供了潜在的应用。

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