钴锰整体式催化剂的电沉积法制备及NO催化氧化性能  

Electrodeposition preparation and NO catalytic capacity of Co/Mnbased monolithic catalysts

作　　者：刘喆 王泽轩 肖蓓 蔡婷 袁静[2] 赵昆峰[2] 何丹农[1,2] LIU Zhe;WANG Zexuan;XIAO Bei;CAI Ting;YUAN Jing;ZHAO Kunfeng;HE Dannong(School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;National Engineering Research Center for Nanotechnology,Shanghai 200241,China)

机构地区：[1]上海交通大学材料科学与工程学院,上海200240 [2]纳米技术及应用国家工程研究中心,上海200241

出　　处：《化工进展》2019年第10期4588-4594,共7页Chemical Industry and Engineering Progress

基　　金：上海市青年启明星计划(16QB1402300);国家自然科学基金(21607098)

摘　　要：整体式催化剂性能高效、应用广泛,而制备方法是影响其性能的关键因素,因此探究简单高效的制备方法对整体式催化剂的工业应用至关重要。本研究以碳纤维布为载体,采用电沉积方法制备了一系列钴锰整体式催化剂,在固定床反应装置上考察了其催化氧化NO性能,并借助拉曼光谱仪、X射线衍射仪和扫描电镜等分析技术对催化剂进行表征。结果表明,采用电沉积法制备的钴锰二元催化剂比相同方法制备的氧化钴或氧化锰一元催化剂的粒径小,且钴锰比例对催化剂粒径影响很大,最小粒径为3~4nm。不同摩尔比例的钴锰二元催化剂焙烧之后物相差别较大,Mn/Co较高的催化剂的主要组成为Mn3O4,Mn/Co较低则趋向Co3O4,其中Mn/Co=2时,催化剂为(CoMn)(CoMn)2O4。电沉积法制备的钴锰整体式催化剂催化氧化NO的性能要远优于相同方法制备的氧化锰催化剂,在50℃下转化率均接近100%。Monolithic catalysts are widely applied in various fields,and exploration on preparation methods for monolithic catalysts is critical for industrial applications.A series of Mn-Co monolithic catalysts of Mn/Co with different molar ratios immobilized on carbon fiber cloth substrate were prepared by electrodeposition method,and their NO oxidation activities were evaluated.Raman,XRD,SEM and other techniques were used to characterize the catalysts.The results showed that the Mn-Co binary catalyst prepared by electrodeposition method had a smaller particle size than cobalt oxide or manganese oxide unary catalyst by same method,and the minimum particle size was 3—4nm.Different Mn/Co molar ratios affected the catalyst particle size and phases a lot.The main substance after calcination of the catalyst with the highest manganese content was Mn3O4.With the cobalt content increasing,the main phase changed to Co3O4,but when Mn/Co=2,the phase of the catalyst was(CoMn)(CoMn)2O4.Co/Mnbased catalysts prepared by electrodeposition had much better NO catalytic activity than manganese oxide catalyst prepared by same method, its conversion was closed to 100% at 50℃.

关 键 词：催化剂 电化学 复合材料 整体器件 纳米材料 

分 类 号：X131.1[环境科学与工程—环境科学] O643.36[理学—物理化学]