文献类型：期刊文献

英文题名：Ce-modified mesoporous gamma-Al2O3 supported Pd-Pt nanoparticle catalysts and their structure-function relationship in complete benzene oxidation

作者：Chen, Zhu[1];Li, Jing[2];Yang, Peng[1];Cheng, Zhen[1];Li, Jingrong[1];Zuo, Shufeng[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Liaocheng Univ, Coll Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Peoples R China

年份：2019

卷号：356

起止页码：255

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000447004100027)、、WOS

基金：We gratefully acknowledge the support of the Nature Science Foundation of China (No. 21577094).

语种：英文

外文关键词：Pd-Pt nanocrystals; Nano-effects; Structure-function; VOC; Catalytic oxidation

外文摘要：In this investigation, a mesoporous gamma-Al2O3 with large surface area and good thermal stability was synthesized and employed as the support for preparing a series of Pd-Pt nanocrystalline catalysts by using a high-temperature solution-phase reduction method. The PdOx (x = 0, 1) and PtOx (x = 0, 2) nanoparticles were found to have a small diameter(about 2 nm) and were highly dispersed on the surface of the mesoporous gamma-Al2O3. The results show that catalysts with the appropriate ceria greatly improved the physical adsorption/chemisorption of benzene to Pd-Pt nanocrystals, which greatly enhanced the activity to achieve the complete oxidation of benzene. The high activity of the catalyst was mainly due to the nano-effects of Pd-Pt nanocrystals and the interactions among the active components. 0.2% Pd-Pt(1:1)/10% Ce/gamma-Al2O3 demonstrated the best activity for the complete oxidation of benzene at 200 degrees C. Furthermore, this catalyst maintained 95% benzene conversion for 1000 h at 190 degrees C and displayed good resistance to water and Cl-poisoning, which indicated that the Pd-Pt nanocrystalline catalysts have promise for adoption by the industry.