Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
Environ Sci Pollut Res Int. 2019 Dec;26(35):35846-35859. doi: 10.1007/s11356-019-06455-6. Epub 2019 Nov 9.
A series of MnCoO flower-like hollow microspheres with various molecular proportions of reactant were prepared through simple solvothermal method for the ammonia selective catalytic reduction (SCR) at low temperatures. The as-prepared samples have been applied by various characterization techniques to explore the formation process of the morphology and physicochemical properties. The Mn(1)Co(1)O presented the optimal intrinsic catalytic performance (95% NO conversion at 75 °C), favorable thermal stability, and strong SO resistance. The excellent properties mainly related to its higher specific surface area and abundant active sites originated from hollow microsphere special structure consists of abundant nanosheets, robust redox properties beneficial for the strong interaction between the manganese and cobalt, larger number of acidic sites and stronger acid strength, etc., which collaboratively dominate its catalytic properties of NH-SCR at low temperatures.
通过简单的溶剂热法制备了一系列具有不同反应物分子比例的 MnCoO 花状空心微球，用于低温下的氨选择性催化还原（SCR）。通过各种表征技术对所制备的样品进行了应用，以探索其形态和物理化学性质的形成过程。所制备的 Mn(1)Co(1)O 表现出最佳的本征催化性能（在 75°C 时，NO 转化率达到 95%）、良好的热稳定性和较强的 SO2 抗性。优异的性能主要与其较高的比表面积和丰富的活性位有关，这些活性位源于空心微球的特殊结构，该结构由丰富的纳米片组成，具有较强的氧化还原性能，有利于锰和钴之间的强相互作用，具有较多的酸性位和较强的酸强度等，这些因素共同决定了其在低温下的 NH-SCR 催化性能。
