Promoting Effects of Iron on CO Oxidation over Au/TiO2 Supported Au Nanoparticles

doi:10.1007/s40242-018-8141-y

高等学校化学研究 ›› 2018, Vol. 34 ›› Issue (6): 965-970.doi: 10.1007/s40242-018-8141-y

Promoting Effects of Iron on CO Oxidation over Au/TiO₂ Supported Au Nanoparticles

ZHONG Siyuan, HAN Qiuwan, ZHU Baolin, HUANG Weiping and ZHANG Shoumin

Key Laboratory of Advanced Energy Material Chemistry of Ministry of Education, Tianjin Key Lab of Metal and Molecule Based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China

收稿日期:2018-05-02 出版日期:2018-12-01 发布日期:2018-08-23
通讯作者: ZHANG Shoumin E-mail:zhangsm@nankai.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(Nos.21271110, 21373120, 21301098), the Applied Basic Research Programs of Science and Technology Commission Foundation of Tianjin, China(Nos.12JCYBJC13100, 13JCQNJC02000) and the Project of Innovation Team of the Ministry of Education of China(No.IRT13022).

Promoting Effects of Iron on CO Oxidation over Au/TiO₂ Supported Au Nanoparticles

ZHONG Siyuan, HAN Qiuwan, ZHU Baolin, HUANG Weiping and ZHANG Shoumin

Key Laboratory of Advanced Energy Material Chemistry of Ministry of Education, Tianjin Key Lab of Metal and Molecule Based Material Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China

Received:2018-05-02 Online:2018-12-01 Published:2018-08-23
Contact: ZHANG Shoumin E-mail:zhangsm@nankai.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.21271110, 21373120, 21301098), the Applied Basic Research Programs of Science and Technology Commission Foundation of Tianjin, China(Nos.12JCYBJC13100, 13JCQNJC02000) and the Project of Innovation Team of the Ministry of Education of China(No.IRT13022).

摘要/Abstract

摘要： Fe-doped TiO₂ supported gold nanoparticles as high-performance CO oxidation catalysts were prepared. XRD data revealed that TiO₂ support was in an anatase phase. After calcination at 300℃, the sample showed nanotube structure, and the size of gold nanoparticles was 3.1 nm. When calcined at 500℃, most nanotubes broke, and gold nanoparticles grew up to 5.9 nm. XPS spectrum indicated the presence of Fe in the +3 oxidation state. Au/Fe-TiO₂(Au:1.44%, Fe:1.35%) calcined at 300℃ possessed the best catalytic activity, and it could completely convert CO at 25℃. The temperature of 100% CO conversion(T_100%) of Fe-free catalyst was 40℃. After the catalysts were stored at room temperature for 7 d, T_100% of Au/Fe-TiO₂ increased from 25℃ to 30℃, while T_100% of Fe-free catalyst increased from 40℃ to 80℃. The catalytic activity and storage stability of Au/TiO₂ could be improved by Fe-doping. The increase of specific surface area, generation of oxygen vacancies and new adsorption sites, depression of the growth of gold nanoparticles, and strong metal-support interaction were responsible for the promoting effect of iron on the catalytic performance of Au/TiO₂ for CO oxidation.

关键词: Titanium dioxide, Nanotube, Gold, Iron, Carbon monoxide

Abstract: Fe-doped TiO₂ supported gold nanoparticles as high-performance CO oxidation catalysts were prepared. XRD data revealed that TiO₂ support was in an anatase phase. After calcination at 300℃, the sample showed nanotube structure, and the size of gold nanoparticles was 3.1 nm. When calcined at 500℃, most nanotubes broke, and gold nanoparticles grew up to 5.9 nm. XPS spectrum indicated the presence of Fe in the +3 oxidation state. Au/Fe-TiO₂(Au:1.44%, Fe:1.35%) calcined at 300℃ possessed the best catalytic activity, and it could completely convert CO at 25℃. The temperature of 100% CO conversion(T_100%) of Fe-free catalyst was 40℃. After the catalysts were stored at room temperature for 7 d, T_100% of Au/Fe-TiO₂ increased from 25℃ to 30℃, while T_100% of Fe-free catalyst increased from 40℃ to 80℃. The catalytic activity and storage stability of Au/TiO₂ could be improved by Fe-doping. The increase of specific surface area, generation of oxygen vacancies and new adsorption sites, depression of the growth of gold nanoparticles, and strong metal-support interaction were responsible for the promoting effect of iron on the catalytic performance of Au/TiO₂ for CO oxidation.

Key words: Titanium dioxide, Nanotube, Gold, Iron, Carbon monoxide

ZHONG Siyuan, HAN Qiuwan, ZHU Baolin, HUANG Weiping and ZHANG Shoumin. Promoting Effects of Iron on CO Oxidation over Au/TiO₂ Supported Au Nanoparticles[J]. 高等学校化学研究, 2018, 34(6): 965-970.

ZHONG Siyuan, HAN Qiuwan, ZHU Baolin, HUANG Weiping and ZHANG Shoumin. Promoting Effects of Iron on CO Oxidation over Au/TiO₂ Supported Au Nanoparticles[J]. Chemical Research in Chinese Universities, 2018, 34(6): 965-970.

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Promoting Effects of Iron on CO Oxidation over Au/TiO₂ Supported Au Nanoparticles

Promoting Effects of Iron on CO Oxidation over Au/TiO₂ Supported Au Nanoparticles

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