Influence of surface acidity and chemical valence on low temperature activity over Pt-HSiW/CeO_(2) for catalytic combustion of chlorobenzene  

作　　者：Zhongxian Song Zepeng Liu Xuejun Zhang Yanli Mao Wei Liu Chunxiang Gao Haiyang Li Xia Zhang Changrui Han Zhenzhen Huang 

机构地区：[1]Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology,Faculty of Environmental and Municipal Engineering,Henan University of Urban Construction,Pingdingshan,467036,China [2]College of Environmental and Safety Engineering,Shenyang University of Chemical Technology,Shenyang,110142,China

出　　处：《Journal of Rare Earths》2024年第9期1693-1703,I0002,共12页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (21872096);Key Research and Development Project of Henan Province (231111320400);Zhongyuan Yingcai Jihua (ZYYCYU202012183);Academic Leader of Henan Institute of Urban Construction (YCJXSJSDTR202204);College Students'Innovation and Entrepreneurship Training Program of Henan Province(202211765053);Doctoral Research Start-up Project of Henan University of Urban Construction (990/Q2017011)。

摘　　要：Pt-HSiW/CeO_(2) catalysts were prepared for chlorobenzene(CB) catalytic combustion by hydrothermal method at different calcination temperatures,and the effects of the surface acidity and chemical valence on the catalytic activity were investigated.The results show that the catalyst calcined at 450℃(Cat-B)exhibits the outstanding catalytic performance,and the Cat-B catalyst possesses 90% conversion of CB at148℃.The excellent catalytic activity of Cat-B is attributed to more Ce^(3+)/(Ce^(3+)+Ce^(4+)),Pt~0/(Pt^(0)+Pt^(2+)),O_(ads)/(O_(latt)+O_(ads)) and Lewis acid sites.The degradation mechanism is proposed based on the analysis of the intermediates with the following reaction pathway:chlorobenzene→phenates/benzoquinone→acetate→maleate→CO_(2)+H_(2)O.

关 键 词：Pt-HSiW/CeO_(2) Catalytic combustion CHLOROBENZENE Acid sites Rare earths 

分 类 号：O643.36[理学—物理化学] X701[理学—化学]