Insights into formation of Pt species in Pt/CeO2 catalysts: Effect of treatment conditions and metal-support interaction

被引：58
作者：
Bugrova, T. A. [1 ]
Kharlamova, T. S. [1 ]
Svetlichnyi, V. A. [1 ]
Savel'eva, A. S. [1 ]
Salaev, M. A. [1 ]
Mamontov, G. V. [1 ]
机构：
[1] Tomsk State Univ, 36 Lenin Ave, Tomsk 634050, Russia
来源：
CATALYSIS TODAY | 2021年 / 375卷
基金：
俄罗斯科学基金会;
关键词：
Pt/CeO2; Metal-support interaction; Treatment conditions; CO oxidation; Single atom catalyst; TEMPERATURE CO OXIDATION; WATER-GAS SHIFT; PLATINUM SINGLE ATOMS; IN-SITU RAMAN; X-RAY; DISPERSED PT/CEO2; ACTIVE-SITES; DOPED CEO2; NANOPARTICLES; CERIA;
D O I：
10.1016/j.cattod.2020.04.039
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The features of the formation of Pt species on the CeO2 surface from adsorbed [PtCl6-yOy] complexes in Pt/CeO2 catalysts depending on the Pt content (0.5, 1.0 and 2.0 wt.%) and treatment conditions (direct Pt precursor reduction, oxidative and reductive treatments) are studied by XRD, CO pulse chemisorption, H-2-TPR, UV-vis DRS, and Raman spectroscopy. The temperature of oxidative decomposition of the Pt precursor is shown to be the key factor that defines the state and size of the Pt species formed. High pretreatment temperature (500 degrees C) provides Pt incorporation into ceria lattice and yields smaller Pt particles after reduction providing strong Pt-CeO2 interaction, while the reduction of the samples dried at 120 degrees C results in the pronounced agglomeration of the formed Pt species to yield Pt particles weakly bonded with the ceria.
引用
收藏
页码：36 / 47
页数：12
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