Optimizing the Pt-FeOx Interaction over Atomic Pt/FeOx/CeO2 Catalysts for Improved CO Oxidation Activity

被引：1

作者：

Wang, Bao-Ju ^{[1
,2
]}

Luo, Yong ^{[1
,2
]}

Chu, Guang-Wen ^{[1
,2
]}

Zhao, Yufei ^{[3
]}

Duan, Xue ^{[3
]}

Chen, Jian-Feng ^{[1
,2
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

[2] Beijing Univ Chem Technol, Res Ctr, Minist Educ High Grav Engn & Technol, Beijing 100029, Peoples R China

[3] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

CHEMIE INGENIEUR TECHNIK | 2023年 / 95卷 / 1-2期

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

CO oxidation; Interfacial sites; Pt-FeOx interaction; Pt; FeOx; CeO2; catalyst; Pt-O-Ce interface; WATER-GAS SHIFT; PREFERENTIAL OXIDATION; OXYGEN VACANCIES; IN-SITU; CERIA; SURFACE; TEMPERATURE; STABILITY; HYDROXIDE; OXIDE;

D O I：

10.1002/cite.202200104

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The metal-supported CeO2 catalysts (such as Pt/CeO2) have been considered as the most promising exhaust-treatment catalyst to meet the future emission standard. However, the Pt-O-Ce interface on Pt/CeO2 system seems to over-stabilize the Pt sites to cause low activity for CO oxidation. In this work, by adding Fe oxides, the enhanced Pt-FeOx interaction was formed with the disappearance of the Pt-O-Ce interface, facilitating the electron transfer from the support to the atomically dispersed Pt on the Pt-FeOx interface for the dramatically CO (preferential) oxidation performance. The single-atom Pt/1.5FeO(x)/CeO2 performed the best catalytic activity with a reaction rate of 0.58 s(-1) at 144 degrees C (T-100). Such strategy in resorting the special metal-support interaction to tune the active sites can be extended to other metal-oxide systems for further optimized catalysis.

引用

页码：68 / 76

页数：9

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