Mn-Polyacrylonitrile Nanofibers Decorated with Co-Metal—Organic Frameworks as Precursors of CoMnOx Catalysts for the Combustion of Toluene,ACS Applied Nano Materials

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Mn-Polyacrylonitrile Nanofibers Decorated with Co-Metal—Organic Frameworks as Precursors of CoMnOx Catalysts for the Combustion of Toluene
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-07-01 , DOI: 10.1021/acsanm.0c01308
Weigao Han _{1,

2} , Fang Dong ₁ , Weiliang Han ₁ , Zhicheng Tang ₁

Affiliation

Three 1D hollow tubelike catalysts with different morphologies were prepared via the technology of electron-spinning and pyrolysis of metal–organic frameworks (MOFs). Based on the different growth position of MOFs, three samples were named as In-PBA/PAN, Out-PBA/PAN, and Mixed-PBA/PAN. After a process of calcination, the well-dispersed In-CoMnO_x/MnO_y, the cube-stacked Out-CoMnO_x/MnO_y, and the particle-agglomerated Mixed-CoMnO_x/MnO_y catalysts were obtained, respectively. For the catalytic combustion of toluene, In-CoMnO_x/MnO_y catalyst showed the best catalytic performance (T₉₀ = 200 °C). It had no significant loss of performance within a 40 h thermal stability run. Simultaneously, it also had a relatively good cycling stability and moisture resistance. The catalytic combustion activity was analyzed through a series of characterizations. It was found that the 1D bead chainlike In-CoMnO_x/MnO_y catalyst could lead to a stronger bimetal synergy effect, more oxygen vacancies, and more weak acid sites compared with the other two samples.

中文翻译：

以金属-有机骨架为装饰材料的Mn-聚丙烯腈纳米纤维作为CoMnO _x催化燃烧甲苯的前体

通过电子自旋和金属有机骨架（MOFs）的热解技术制备了三种不同形态的一维中空管状催化剂。根据MOF的不同生长位置，将三个样品分别命名为In-PBA / PAN，Out-PBA / PAN和Mixed-PBA / PAN。经过煅烧过程，分别获得了分散良好的In-CoMnO _x / MnO _y，立方堆积的Out-CoMnO _x / MnO _y以及颗粒团聚的混合CoMnO _x / MnO _y催化剂。对于甲苯的催化燃烧，In-CoMnO _x / MnO _y催化剂表现出最佳的催化性能（T ₉₀= 200°C）。在40小时的热稳定性测试中，它没有明显的性能损失。同时，它还具有相对较好的循环稳定性和耐湿性。通过一系列表征分析了催化燃烧活性。发现与其他两个样品相比，一维珠状链状In-CoMnO _x / MnO _y催化剂可导致更强的双金属协同作用，更多的氧空位和更多的弱酸位。

更新日期：2020-08-28

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