Electron donation promotes the dual activation of lattice oxygen and molecular oxygen: The Pt-Pd/CeO2 catalyst efficiently catalyzes toluene

被引：11

作者：

Wang, Lei ^{[1
]}

Sun, Yonggang ^{[1
]}

Ma, Yulong ^{[1
]}

Xu, Min ^{[1
]}

Zhang, Juan ^{[1
]}

Zhu, Yingbo ^{[1
]}

Ding, Jie ^{[1
]}

Zhu, Li ^{[1
]}

Ma, Jing ^{[1
]}

Ji, Wenxin ^{[1
]}

Wang, Liqiong ^{[1
]}

Li, Yuanyuan ^{[1
]}

机构：

[1] Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High Efficiency Coal Utilizat & Gree, Yinchuan 750021, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2023年 / 428卷

基金：

中国国家自然科学基金;

关键词：

Pt-Pd/CeO2; Toluene oxidation; Electron transfer; In-situ DRIFTS; Quasi in-situ XPS; LOW-TEMPERATURE; OXIDATION; HYDROPHOBICITY; NANOPARTICLES; DESTRUCTION; OPERANDO; BENZENE;

D O I：

10.1016/j.jcat.2023.115133

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：

Dual activation of molecular and lattice oxygen is an important step in the catalytic oxidation of volatile organic compounds. Herein, CeO2 was derived from MOF as an electron donor support to develop a co-catalyst with Pt-Pd alloy nanoparticles (Pt-Pd/CeO2). The Prepared Pt-Pd/CeO2 exhibits excellent catalytic activity towards toluene oxidation, showing a turnover frequency (TOF 0.26 s-1) higher than those of Pt/CeO2 (0.05 s-1) and Pd/ CeO2 (0.02 s-1). Several in situ experimental techniques and density functional theory calculations have revealed that the introduction of Pd valence electrons can intensify the electronic metal-support interactions (EMSIs) effects of Pt-Pd/CeO2 catalysts, which can weaken the Ce-O bond, thereby promoting the production and circulation of lattice oxygen and oxygen vacancies, and modulating the d-band centre to enhance the adsorption and activation of reactants. This study presents a comprehensive investigation of toluene oxidation on alloy-supported catalysts, providing practical guidance for designing reliable catalysts suitable for industrial applications.

引用

页数：12

共 21 条

[21] The Absence of Oxygen in Sulfation Promotes the Performance of the Sulfated CeO2 Catalyst for Low-Temperature Selective Catalytic Reduction of NOx by NH3: Redox Property versus Acidity
Wu, Qin
Chen, Xiaoping
Mi, Jinxing
Cai, Sixiang
Ma, Lei
Zhao, Weitao
Chen, Jianjun
Li, Junhua
ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2021, 9 (02): : 967 - 979

← 1 2 3 →