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Ce-modified mesoporous γ-Al2O3 supported Pd-Pt nanoparticle catalysts and their structure-function relationship in complete benzene oxidation

修改 Ce 的 mesoporous -Al<sub>2</sub>O<sub>3</sub> 在完全的苯氧化支持了 Pd 磅 nanoparticle 催化剂和他们的结构功能关系

作     者:Chen, Zhu Li, Jing Yang, Peng Cheng, Zhen Li, Jingrong Zuo, Shufeng 

作者机构:Shaoxing Univ Zhejiang Key Lab Alternat Technol Fine Chem Proc Shaoxing 312000 Peoples R China Liaocheng Univ Coll Chem & Chem Engn Shandong Prov Key Lab Chem Energy Storage & Novel Liaocheng 252059 Peoples R China 

出 版 物:《CHEMICAL ENGINEERING JOURNAL》 (化学工程杂志)

年 卷 期:2019年第356卷

页      面:255-261页

核心收录:

学科分类:0830[工学-环境科学与工程(可授工学、理学、农学学位)] 0817[工学-化学工程与技术] 08[工学] 

基  金:Nature Science Foundation of China 

主  题:Pd-Pt nanocrystals Nano-effects Structure-function VOC Catalytic oxidation 

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.

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