Ultralow loading Ru/CeO2 with strong metal-support interaction for efficient catalytic wet air oxidation of m-cresol

被引：0
作者：
Luan, Tianyu [1 ]
Lu, Huaiqian [2 ,3 ]
Han, Lina [1 ]
Jia, Litao [2 ]
Xiao, Yong [2 ]
Li, Debao [2 ]
机构：
[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030001, Shanxi, Peoples R China
[2] Chinese Acad Sci, State Key Lab Coal Convers, Inst Coal Chem, Taiyuan 030001, Shanxi, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2025年 / 704卷
关键词：
Wet air oxidation; Ru; CeO2; Metal-support interaction; Morphology; Ru-O-Ce; AQUEOUS-SOLUTIONS; CO ADSORPTION; ACETIC-ACID; RUTHENIUM; PHENOL; CERIA; CEO2; RU; KINETICS; SURFACE;
D O I：
10.1016/j.apcata.2025.120367
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：
Modulating the metal-support interaction (MSI) is an efficient strategy to optimize the catalytic wet air oxidation (CWAO) performance. Herein, ultralow loading (0.3 wt%) Ru/CeO2 catalysts were synthesized based on the morphology-dependent effect of ceria supports (nanorods vs. nanocubes) and evaluated for m-cresol degradation. We found that the MSI does not only govern the chemical states of Ru species but also regulates the structure of the interfacial sites and the density of oxygen vacancies. Ru/CeO2-R, with stronger Ru-CeO2 interactions, possesses more Run+ species, well-defined Ru-O-Ce interfacial sites and oxygen vacancies, which enhance oxygen activation and carbon deposits elimination. Consequently, the Ru/CeO2-R catalyst exhibits higher catalytic activity (k = 0.41 min(-1)) and long-term stability for m-cresol degradation compared to Ru/CeO2-C. This work provides a rational design strategy for Ru-based CWAO catalysts by modulating MSI and interfacial site engineering for the degradation of recalcitrant pollutants.
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页数：8
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