Insight of Pt-support interaction in S-Pt/Ce0.7Zr0.3O2 by in situ Raman spectroscopy

被引：22

作者：

Wu, Quanwen ^{[1
]}

Ba, Jingwen ^{[1
]}

Yan, Xiayan ^{[1
]}

Bao, Jinchun ^{[1
]}

Huang, Zhiyong ^{[1
]}

Dou, Sanping ^{[1
]}

Dai, Danling ^{[1
]}

Tang, Tao ^{[1
]}

Luo, Wenhua ^{[1
]}

Meng, Daqiao ^{[1
]}

机构：

[1] China Acad Engn Phys, Mianyang 621900, Sichuan, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2017年 / 98卷

关键词：

Pt/CeO2; Pt/Ce0.7Zr0.3O2; Strong metal-support interaction; Single atom catalyst; Raman spectroscopy; OXIDATION-STATE; CATALYSTS; SURFACE; ENERGY; PD;

D O I：

10.1016/j.catcom.2017.04.045

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Strong Metal-Support Interactions (SMSI) are important in Pt supported catalysts for their catalytic performance. SMSI in Pt/CeO2, Pt/Ce0.7Zr0.3O2 and single atom S-Pt/Ce0.7Zr0.3O2 catalysts were studied by in situ Raman spectroscopy and H-2 Temperature-Programmed Reduction. Evidence of SMSI in Pt/CeO2 and Pt/Ce0.7Zr0.3O2 that improve the reduction properties of supports other than H-2 dissociation and spillover is obtained. It was also found that Pt-O and Pt-O-Ce bonding in the said catalysts play an important role in SMSI. The Pt bonding could be ascribed to Pt oxides species (Pt-1 (+) and Pt-2 +) with different Pt adsorption sites on CeO2 surface and which act as intermediates in reduction process. This gives a new insight into the SMSI and explains the observed Pt/CeO2 reduction characteristics.

引用

页码：34 / 37

页数：4