Structured hierarchical Mn–Co mixed oxides supported on silicalite-1 foam catalyst for catalytic combustion  

作　　者：Yanan Guan Hengyu Shen Xing Guo Boyang Mao Zhenyuan Yang Yangtao Zhou He Liang Xiaolei Fan Yilai Jiao jinsong Zhang 

机构地区：[1]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China [3]Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730010,China [4]Department of Engineering,University of Cambridge,JJ Thomson Avenue,Cambridge CB30FA,United Kingdom [5]Department of Eye and Vision Science,Institute of Life Course and Medical Sciences,University of Liverpool,6 WestDerby Street,Liverpool,L78TX,United Kingdom [6]Department of Chemical Engineering and Analytical Science,School of Engineering,The University of Manchester,Oxford Road,Manchester,M139PL,United Kingdom

出　　处：《Chinese Journal of Chemical Engineering》2020年第9期2319-2327,共9页中国化学工程学报（英文版）

基　　金：financial support from the Key Projects of Natural Science Foundation of Liaoning Province(2018010047-301);the Shenyang National Laboratory for Materials Science for his research(Y8L6641161);financial support from the National Key R&D Program of China(2016YFB0501303);funding from European Union's Horizon 2020 research and innovation programme under grant agreement No.872102。

摘　　要：Silicalite-1(S1)foam was functionalized by supporting manganese-cobalt(Mn-Co)mixed oxides to develop the structured hierarchical catalyst(Mn-Co@SlF)for catalytic combustion for the first time.The self-supporting S1 foam with hierarchical porosity was prepared via hydrothermal synthesis with polyurethane(PU)foam as the template.Subsequently,Mn-Co oxide nano sheets were uniformly grown on the surface of S1 foams under hydrothermal conditions to prepare the structured hierarchical catalyst with specific surface area of 354 m^2·g^-1,micropore volume of 0.141 cm^3·g^-1 and total pore volume of 0.217 cm3·g^-1,as well as a good capacity to adsorb toluene(1.7 mmol·g^-1 at p/p0=0.99).Comparative catalytic combustion of toluene of over developed structured catalyst Mn-Co@SlF was performed against the control catalysts of bulk Mn-Co@S1(i.e.,the crushed Mn-Co@SlF)and unsupported Mn-Co oxides(i.e.,Mn-Co).Mn-Co@SlF exhibited comparatively the best catalytic performance,that is,complete and stable toluene conversion at 2480 C over 65 h due to the synergy between Mn-Co oxides and S1 foam,which provided a large number of oxygen vacancies,high redox capacity.In addition,the hierarchical porous structure also improved the accessibility of active sites and facilitated the global mass transfer across the catalyst bed,being beneficial to the catalysis and catalyst longevity.

关 键 词：Structured catalyst SILICALITE-1 Mn-Co oxides Cellular foam Catalytic combustion 

分 类 号：O643.36[理学—物理化学]