@article{Song2023, 
author = {Jingjing Song and Shaomian Liu and Yongjun Ji and Wenqing Xu and Jian Yu and Bing Liu and Wenxing Chen and Jianling Zhang and Lihua Jia and Tingyu Zhu and Ziyi Zhong and Guangwen Xu and Fabing Su},
title = {Dual single-atom Ce-Ti/MnO2 catalyst enhances low-temperature NH3-SCR performance with high H2O and SO2 resistance},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {1},
pages = {299-308},
keywords = {dual single atom catalyst, Ce-Ti/MnO2, low-temperature performance, selective catalytic reduction of NOx with NH3 (NH3-SCR), H2O- and SO2-resistance},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4790-8},
doi = {10.1007/s12274-022-4790-8},
abstract = {Mn-based catalysts have exhibited promising performance in low-temperature selective catalytic reduction of NOx with NH3 (NH3-SCR). However, challenges such as H2O- or SO2-induced poisoning to these catalysts still remain. Herein, we report an efficient strategy to prepare the dual single-atom Ce-Ti/MnO2 catalyst via ball-milling and calcination processes to address these issues. Ce-Ti/MnO2 showed better catalytic performance with a higher NO conversion and enhanced H2O- and SO2-resistance at a low-temperature window (100−150 °C) than the MnO2, single-atom Ce/MnO2, and Ti/MnO2 catalysts. The in situ infrared Fourier transform spectroscopy analysis confirmed there is no competitive adsorption between NOx and H2O over the Ce-Ti/MnO2 catalyst. The calculation results showed that the synergistic interaction of the neighboring Ce-Ti dual atoms as sacrificial sites weakens the ability of the active Mn sites for binding SO2 and H2O but enhances their binding to NH3. The insight obtained in this work deepens the understanding of catalysis for NH3-SCR. The synthesis strategy developed in this work is easily scaled up to commercialization and applicable to preparing other MnO2-based single-atom catalysts.}
}