Effect of support (Degussa P25 TiO2, anatase TiO2, γ-Al2O3, and AlOOH) of Pt-based catalysts on the formaldehyde oxidation at room temperature

被引：29
作者：
Chen, Fei [1 ]
Wang, Feng [1 ]
Li, Qing [1 ]
Cao, CaiYuan [1 ]
Zhang, Xiang [1 ]
Ma, Hua [1 ]
Guo, Yu [1 ]
机构：
[1] NanJing Tech Univ, State Key Lab Mat Oriented Chem Engn, Coll Chem Engn, 5 Xinmofan Rd, Nanjing 210009, Jiangsu, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2017年 / 99卷
基金：
中国国家自然科学基金;
关键词：
Catalyst support; Pt catalyst; Formaldehyde; Room temperature oxidation; Surface hydroxyl; AMBIENT-TEMPERATURE; PT/TIO2; CATALYST; COMBUSTION; REMOVAL;
D O I：
10.1016/j.catcom.2017.05.019
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：
Different catalyst supports, namely: commercial Degussa P25 TiO2, anatase TiO2 (CC), gamma-Al2O3, and lab synthesized AlOOH were used to prepare Pt-based catalysts for the room temperature formaldehyde oxidation. XRD, BET and XPS were conducted to characterize the bulk structure of support, the oxidation state of surface elements and the ratio of oxygen in hydroxyls to the total surface oxygen, as well as textural properties of catalysts. For the first time, a long-term activity test at 0% relative humidity was conducted to investigate relationships between the activity of the Pt-based catalysts with Pt dispersion and oxidation state and the relative abundance of surface OH groups. Pt/AlOOH showed the best activity, whereas Pt/P25 TiO2 gave the worst activity. We consider that both the surface hydroxyl groups and the Pt dispersion are indispensable, and both act synergistically. The specific surface area is not the decisive factor for the present reaction.
引用
收藏
页码：39 / 42
页数：4
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