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

页码：54187 / 54193

页数：7

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