Indexed by:
期刊论文
First Author:
Jin, Jianhui
Correspondence Author:
Liang, CH (reprint author), Dalian Univ Technol, Lab Adv Mat & Catalyt Engn, Dalian 116024, Peoples R China.
Co-author:
Li, Chuang,Tsang, Chi-Wing,Xu, Bin,Liang, Changhai
Date of Publication:
2016-03-02
Journal:
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Included Journals:
SCIE、EI
Document Type:
J
Volume:
55
Issue:
8
Page Number:
2293-2301
ISSN No.:
0888-5885
Abstract:
Nanocrystalline Pt-Ce oxides were prepared by citric acid method and impregnation method, and then mounted on cordierites to investigate the catalytic behavior for methane oxidation under scarce oxygen environment. XRD, H-2-TPR, TEM, and XPS were employed to investigate the relationship between physicochemical characteristics and catalytic performances. Pt-CeO2 showed good activity for oxygen conversion in fuel rich condition, especially during extinction step, with a huge hysteresis loop. By varying the oxygen concentration, Pt-CeO2 catalysts were poisoned by oxygen along ignition, and the competitive adsorption of oxygen and methane inhibits the activation of methane. Owing to the interaction between Pt and CeO2, and a more homogeneous dispersion of Pt in CeO2 compared with that of Pt/CeO2 prepared by impregnation, Pt-CeO2 catalysts maintained high activity during calcination and pretreatments.
Translation or Not:
no
