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CaO-Promoted Lattice Oxygen Activation and Antichlorine Poisoning over Mullite for Catalytic Chlorobenzene Combustion
ACS Catalysis ( IF 11.3 ) Pub Date : 2023-07-24 , DOI: 10.1021/acscatal.3c01871 Yi Liu 1 , Fanyu Wang 1 , Fei Xie 1 , Jiamin Zheng 1 , Jintong Lan 1 , Furong Guo 1 , Yifei Sun 2 , Lizhi Zhang 1, 3 , Xiao Liu 1
ACS Catalysis ( IF 11.3 ) Pub Date : 2023-07-24 , DOI: 10.1021/acscatal.3c01871 Yi Liu 1 , Fanyu Wang 1 , Fei Xie 1 , Jiamin Zheng 1 , Jintong Lan 1 , Furong Guo 1 , Yifei Sun 2 , Lizhi Zhang 1, 3 , Xiao Liu 1
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The degradation of chlorine-containing volatile organic compounds (Cl–VOCs) utilizing catalytic combustion technology is subject to the paradox of toxic byproduct formation and catalyst chlorine poisoning. Herein, a CaO-assisted strategy is proposed to resolve the awkward stuff for improving the catalytic combustion performance of chlorobenzene on SmMn2O5. The CaO-collaborated SmMn2O5 exhibits a significant decrease in T90 by 142 and 125 °C compared with unmodified and inert SiO2-composited SmMn2O5, respectively. The integrated characterization results confirm that CaO collaboration causes electron transfer from CaO to SmMn2O5, resulting in a reduction of the orbital overlap between Mn and O atoms to activate lattice oxygen (Olatt). The activated Olatt enables chlorobenzene to combust completely at a lower temperature of 275 °C at which toxic byproducts are not generated. Furthermore, the switching of the dechlorination site from SmMn2O5 to CaO avoids chlorine poisoning of active sites on SmMn2O5 and thus endows CaO-collaborated SmMn2O5 with prominent stability.
中文翻译：
CaO促进莫来石晶格氧活化和抗氯中毒催化氯苯燃烧
利用催化燃烧技术降解含氯挥发性有机化合物（Cl-VOC）会遇到有毒副产物形成和催化剂氯中毒的矛盾。在此，提出了CaO辅助策略来解决提高氯苯在SmMn 2 O 5上催化燃烧性能的难题。与未改性和惰性 SiO 2 复合的 SmMn 2 O 5 相比，CaO配合的SmMn 2 O 5的T 90显着降低142 和 125 °C， 分别。综合表征结果证实，CaO 协作导致电子从 CaO 转移到 SmMn 2 O 5，从而减少 Mn 和 O 原子之间的轨道重叠，从而激活晶格氧 (O latt )。活化的Olatt使氯苯能够在275°C的较低温度下完全燃烧，并且不会产生有毒副产物。此外，脱氯位点从SmMn 2 O 5转换为CaO避免了SmMn 2 O 5活性位点的氯中毒，从而赋予CaO协同SmMn 2 O 5显着的稳定性。
更新日期：2023-07-24
中文翻译：
CaO促进莫来石晶格氧活化和抗氯中毒催化氯苯燃烧
利用催化燃烧技术降解含氯挥发性有机化合物（Cl-VOC）会遇到有毒副产物形成和催化剂氯中毒的矛盾。在此，提出了CaO辅助策略来解决提高氯苯在SmMn 2 O 5上催化燃烧性能的难题。与未改性和惰性 SiO 2 复合的 SmMn 2 O 5 相比，CaO配合的SmMn 2 O 5的T 90显着降低142 和 125 °C， 分别。综合表征结果证实，CaO 协作导致电子从 CaO 转移到 SmMn 2 O 5，从而减少 Mn 和 O 原子之间的轨道重叠，从而激活晶格氧 (O latt )。活化的Olatt使氯苯能够在275°C的较低温度下完全燃烧，并且不会产生有毒副产物。此外，脱氯位点从SmMn 2 O 5转换为CaO避免了SmMn 2 O 5活性位点的氯中毒，从而赋予CaO协同SmMn 2 O 5显着的稳定性。
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