Citation: Honggen Peng, Jiawei Ying, Jingyan Zhang, Xianhua Zhang, Cheng Peng, Cheng Rao, Wenming Liu, Ning Zhang, Xiang Wang. La-doped Pt/TiO₂ as an efficient catalyst for room temperature oxidation of low concentration HCHO[J]. Chinese Journal of Catalysis, ;2017, 38(1): 39-47. doi: 10.1016/S1872-2067(16)62532-9 shu

La-doped Pt/TiO₂ as an efficient catalyst for room temperature oxidation of low concentration HCHO

a Institute of Applied Chemistry, College of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China;
b School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received Date: 30 August 2016
Revised Date: 21 September 2016

Fund Project: This work was supported by the National Key Research and Development Program (2016YFC0205900), the National Natural Science Foundation of China (21503106, 21567016), the Education Department of Jiangxi Province (KJLD14005), and the Natural Science Foundation of Jiangxi Province (20142BAB213013 and 20151BBE50006).

Catalytic oxidation of formaldehyde (HCHO) is the most efficient way to purify indoor air of HCHO pollutant. This work investigated rare earth La-doped Pt/TiO₂ for low concentration HCHO oxida-tion at room temperature. La-doped Pt/TiO₂ had a dramatically promoted catalytic performance for HCHO oxidation. The reasons for the La promotion effect were investigated by N₂ adsorption, X-ray diffraction, CO chemisorption, X-ray photoelectron spectroscopy, transmission electron microscopy (TEM) and high-angle annular dark field scanning TEM. The Pt nanoparticle size was reduced to 1.7 nm from 2.2 nm after modification by La, which led to higher Pt dispersion, more exposed active sites and enhanced metal-support interaction. Thus a superior activity for indoor low concentration HCHO oxidation was obtained. Moreover, the La-doped TiO₂ can be wash-coated on a cordierite monolith so that very low amounts of Pt (0.01 wt%) can be used. The catalyst was evaluated in a simulated indoor HCHO elimination environment and displayed high purifying efficiency and stabil-ity. It can be potentially used as a commercial catalyst for indoor HCHO elimination.
- Low-concentration formaldehyde,
- Room-temperature oxidation,
- Rare earth,
- Lanthanum doping,
- Platinum,
- Titania,
- Monolithic catalyst
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La-doped Pt/TiO2 as an efficient catalyst for room temperature oxidation of low concentration HCHO

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通讯作者: 陈斌, bchen63@163.com

La-doped Pt/TiO₂ as an efficient catalyst for room temperature oxidation of low concentration HCHO