Insight into the Metal-Support Interaction of Pt and β-MnO2 in CO Oxidation

被引:5
作者
Zhang, Tiantian [1 ]
Xu, Jiacheng [1 ,2 ]
Sun, Yan [1 ]
Fang, Shiyu [1 ]
Wu, Zuliang [1 ,3 ]
Gao, Erhao [1 ,3 ]
Zhu, Jiali [1 ,3 ]
Wang, Wei [1 ,3 ]
Yao, Shuiliang [1 ,2 ,3 ]
Li, Jing [1 ,3 ]
机构
[1] Changzhou Univ, Sch Environm Sci & Engn, Changzhou 213164, Peoples R China
[2] Changzhou Univ, Sch Mat Sci & Engn, Changzhou 213164, Peoples R China
[3] Key Lab Adv Plasma Catalysis Engn China Petrochem, Changzhou 213164, Peoples R China
来源
MOLECULES | 2023年 / 28卷 / 19期
基金
中国国家自然科学基金;
关键词
metal-support interaction; CO oxidation; terminal-type oxygen; bridge-type oxygen; Pt; MnO2; REACTION-MECHANISM; CATALYST; FORMALDEHYDE; COOXIDATION; DRIFTS;
D O I
10.3390/molecules28196879
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Pt-based catalysts exhibit unique catalytic properties in many chemical reactions. In particular, metal-support interactions (MSI) greatly improve catalytic activity. However, the current MSI mechanism between platinum (Pt) and the support is not clear enough. In this paper, the interaction of 1 wt% Pt nanoparticles (NPs) on beta-MnO2 in carbon monoxide (CO) oxidation was studied. The Pt on beta-MnO2 inhibited CO oxidation below 210 degrees C but promoted it above 210 degrees C. A Pt/beta-MnO2 catalyst contains more Pt4+ and less Pt2+. The results of operando DRIFTS-MS show that surface-terminal-type oxygen (M=O) plays an important role in CO oxidation. When the temperature was below 210 degrees C, Mn=O consumption on Pt/beta-MnO2 was less than beta-MnO2 due to Pt4+ inhibition on CO oxidation. When the temperature was above 210 degrees C, Pt4+ was reduced to Pt2+, and Mn=O consumption due to CO oxidation was greater than beta-MnO2. The interaction of Pt and beta-MnO2 is proposed.
引用
收藏
页数:15
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