One-pot synthesis of mesoporous Al2O3 -supported Pt-Pd catalysts for toluene combustion
One-pot synthesis of mesoporous Al2O3 -supported Pt-Pd catalysts for toluene combustion
复制标题
一锅法合成介孔Al2O3负载Pt-Pd甲苯燃烧催化剂
DOI：
10.1016/j.catcom.2018.07.003
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发表时间：
2018-09-01
影响因子：
3.7
通讯作者：
Su, Weikang
中科院分区：
文献类型：
--
作者：
Liu, Xin;Zhang, Qiulin;Su, Weikang
介孔AL2O3支持的PT-PD催化剂是通过一步蒸发诱导的自组装（EISA）过程制备的，并用于甲苯燃烧。发现单锅准备的PT-PD-PD-AL2O3催化剂的T-90（160度C）和激活能（43 kJ/mol）低于常规AL2O3支持的PT-PD催化剂，该催化剂由湿浸入方法（250摄氏度，49.8 kJ/mol）制备。此外，一锅制备的PT-PD-AL2O3催化剂显示了中氧化通道中存在纳米PT-PD颗粒。在单盘EISA方法方面，BI金属PT-PD-AL2O3催化剂比单金属PT-AL2O3和PD-AL2O3催化剂显示出贵族金属平均粒径（6.1 nm）和十个降低的降低。证明目前的PT-PD-AL2O3催化系统表现出最低的T-90和T-90参数值，并且与在文献中报道的几种表现最佳的催化剂相比，在可比较的空间速度和甲苯饲料速度下的明显激活能。
Mesoporous Al2O3-supported Pt-Pd catalyst was prepared via a one-step evaporation-induced self-assembly (EISA) process and employed for toluene combustion. It was found that the T-90 (160 degrees C) and activation energy (43 kJ/mol) of the one-pot prepared Pt-Pd-Al2O3 catalyst are lower than the conventional Al2O3-supported Pt-Pd catalyst prepared by the wet impregnation method (250 degrees C, 49.8 kJ/mol). Moreover, the one-pot prepared Pt-Pd-Al2O3 catalyst shows the presence of nano Pt-Pd particles in the mesochannels. In terms of the one-pot EISA approach, the bi-metallic Pt-Pd-Al2O3 catalyst exhibits reduced noble-metal mean particle size (6.1 nm) and Ten than the mono-metallic Pt-Al2O3 and Pd-Al2O3 catalysts. It was demonstrated that the present Pt-Pd-Al2O3 catalytic system exhibits the lowest T-90 and T-90 parameter values and apparent activation energy at comparable space velocities and toluene feed composition compared to several best performed catalysts reported in the literature.