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A highly dispersed Pt/copper modified-MnO_(2)catalyst for the complete oxidation of volatile organic compounds:The effect of oxygen species on the catalytic mechanism

查看全文 作　　者：Xunxun [1]Li;Yaru [1]Wang;Dongyun [1]Chen;Najun [1]Li;Qingfeng [1]Xu;Hua [1]Li;Jinghui [1]He;Jianmei [1]Lu 高影响力作者 机构地区：[1]College of Chemistry,Chemical Engineering and Materials Science,Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou,Jiangsu,215123,China高影响力机构 出　　处：《Green Energy & Environment》索引2023年第8卷第2期,共10页高影响力期刊 基　　金：financial support provided by the National Key R&D Program of China(2020YFC1808401);National Natural Science Foundation of China(22078213,21938006,51973148,21776190);cuttingedge technology basic research project of Jiangsu(BK20202012);the project supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。 摘　　要：Manganese oxide(MnO_(2))exhibits excellent activity for volatile organic compound oxidation.However,it is currently unknown whether lattice oxygen or adsorbed oxygen is more conducive to the progress of the catalytic reaction.In this study,novel hollow highly dispersed Pt/Copper modified-MnO_(2)catalysts were fabricated.Cu^(2+)was stabilized into theδ-MnO_(2)cladding substituting original K+,which produced lattice defects and enhance the content of adsorbed oxygen.The 2.03 wt%Pt Cu_(0.050)-MnO_(2)catalyst exhibited the highest catalytic activity and excellent stability for toluene and benzene oxidation,with T_(100)=160℃under high space velocity(36,000 mL g^(-1)h^(-1)).The excellent performance of catalytic oxidation of VOCs is attributed to the abundant adsorbed oxygen content,excellent low-temperature reducibility and the synergistic catalytic effect between the Pt nanoparticles and Cu_(0.050)-MnO_(2).This study provides a comprehensive understanding of the Langmuir-Hinshelwood(L-H)mechanism occurring on the catalysts. 关 键 词：Oxygen species TOLUENE BENZENE d-MnO_(2) HOLLOW
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