Promotion of low-temperature oxidation of CO over Pd supported on titania-coated ceria

被引：14
|
作者：
Satsuma, Atsushi [1 ,2 ]
Yanagihara, Masatoshi [1 ]
Osaki, Kaoru [1 ]
Saeki, Yurina [1 ]
Liu, Heng [1 ]
Yamamoto, Yuta [3 ]
Arai, Shigeo [3 ]
Ohyama, Junya [1 ,2 ]
机构：
[1] Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan
[2] Kyoto Univ, Unit Elements Strategy Initiat Catalysts & Batter, Kyoto 6158530, Japan
[3] Nagoya Univ, Ecotopia Sci Inst, Nagoya, Aichi 4648603, Japan
来源：
RSC ADVANCES | 2014年 / 4卷 / 97期
关键词：
CATALYTIC-ACTIVITY; PD/CEO2-TIO2; CATALYST; LATTICE OXYGEN; COMBUSTION; OXIDE; CEO2; REDUCTION; PALLADIUM; REDUCIBILITY; ACTIVATION;
D O I：
10.1039/c4ra10167g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The design of a metal oxide support for Pd was investigated to promote the oxidation of CO at lower temperatures. Through a screening study using pure metal oxides, Pd/CeO2 showed the highest activity above 100 degrees C, while homemade TiO2 was more effective below 100 degrees C as a support for Pd. Applying the advantages of CeO2 and TiO2, we proposed a TiO2-CeO2 support having a monolayer amount of surface TiO2 supported on CeO2. The Pd/TiO2-CeO2 catalyst showed higher activity than both Pd/TiO2 and Pd/CeO2, which was not achieved by using the CeO2-TiO2 mixed-oxide. The light-off temperature over Pd/TiO2-CeO2 was 100 degrees C lower than Pd/Al2O3. The effect of surface TiO2 was attributed to the promotion of the reduction-oxidation cycle of supported Pd.
引用
收藏
页码：54187 / 54193
页数：7
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