文献类型：期刊文献

英文题名：Close-Contact Oxygen Vacancies Synthesized by FSP Promote the Supplement of Active Oxygen Species To Improve the Catalytic Combustion Performance of Toluene

作者：Jiang, Jiechao[1];Zhu, Zhengju[1];He, Ying[1];Sarkodie, Bismark[1];Wang, Wenyi[1];Jiang, Hao[1];Hu, Yanjie[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Environm Friendly Mat Tech Serv Platform, Key Lab Ultrafine Mat Minist Educ, Shanghai 200237, Peoples R China

年份：2023

卷号：39

期号：3

起止页码：1093

外文期刊名：LANGMUIR

收录：;EI(收录号：20230313405951);WOS:【SCI-EXPANDED(收录号:WOS:000918119200001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grants 21978088, 91534202, 51673063, and 22108079), Program of Shanghai Academic/Technology Research Leader (Grant 20XD1433600), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutes of High Learning and the Fundamental Research Funds for the Central Universities (Grant 222201718002), Shanghai Pujiang Program (Grant 21PJD018), and Shanghai "Science and Technology Innovation Action Plan" technical standard project (Grant 19DZ2205300). Additional support was provided by Feringa Nobel Prize Scientist Joint Research Center. This work is grateful to Shen Xinchun (HaiNing people's court) for her help in the production of pictures.

语种：英文

外文关键词：Activation energy - Catalysis - Catalysts - Catalytic oxidation - Combustion - Flame spraying - Spray pyrolysis - Toluene

摘要：Catalytic combustion is an important means to reduce toluene pollution, and improving the performance of catalytic combustion catalysts is of great significance for practical applications. The study of oxygen vacancies is one of the key steps to improve catalyst performance. Here, two different oxygen vacancy structures were well-defined and controllably synthesized by flame spray pyrolysis (FSP) to evaluate their effect on the catalytic combustion performance of toluene. The closely contacted oxygen vacancies (cVo) enhance the oxygen activation capacity of the catalyst, and the temperature of the first oxygen desorption peak and hydrogen reduction peak is 56 and 37 degrees C lower than the separated oxygen vacancy (s-Vo) sample, respectively. The oxygen activation energy barrier on the c-Vo is calculated to be negligible of only 0.04 eV. Both in situ DRIFT and DFT calculations indicate that the c-Vo structure accelerates the catalytic oxidation of p toluene molecules. Moreover, due to the unique characteristics of high-temperature synthesis and rapid quenching, FSP brings excellent water resistance and high-temperature stability to the catalyst. In conclusion, utilizing the FSP in situ reduction strategy can create more c-Vo to improve the catalytic combustion performance of toluene.