Intermetallic compound PtMn -derived Pt−MnO supported on mesoporous CeO2: Highly efficient catalysts for the combustion of toluene
作者:Xiaohang Fu、Yuxi Liu、Jiguang Deng、Lin Jing、Xing Zhang、Kunfeng Zhang、Zhuo Han、Xiyun Jiang、Hongxing Dai
DOI:10.1016/j.apcata.2020.117509
日期:2020.4
possessed good thermal stability and water-resistant performance. Benzyl alcohol, benzoic acid, and maleic anhydride were proven to be the main intermediates of toluene combustion, hence, toluene combustion might take place through a sequence of toluene → benzyl alcohol and benzoic acid → maleic anhydride → carbon dioxide and water, which might obey the Eley―Rideal reaction mechanism. It is concluded
金属间化合物是非均相催化中的一种重要物质。在这项工作中,我们首先使用聚乙烯吡咯烷酮辅助的乙二醇还原法合成了PtMn y金属间纳米晶体,然后将其负载在源自KIT-6模板路线的介孔CeO 2(meso-CeO 2)的表面, 在空气中500°C煅烧后生成m Pt- n MnO x / meso-CeO 2(m = 0-0.39 wt%,n = 0-1.21 wt%)催化剂。发现所获得的催化剂表现出有序的介孔结构,表面积为95-108 m 2。/G。0.37Pt-0.16MnO x / meso-CeO 2样品表现出最佳的甲苯燃烧催化性能(在空速= 40,000 mL /(gh)时,T 50% = 162°C和T 90% = 171°C)。动力学分析表明,在性能最佳的0.37Pt-0.16MnO x / meso-CeO 2样品上获得的表观活化能(57 kJ / mol)低于在其他样品上获得的表观活化能(63-75