Citation: WEI Min, CHENG Li-jun, YUAN Shan-liang, BO Qi-fei, ZHANG Biao, JIANG Yi. Effect of pH value on the structure and properties of iron-molybdenum catalysts during preparation[J]. Journal of Fuel Chemistry and Technology, ;2019, 47(2): 209-214. shu

Effect of pH value on the structure and properties of iron-molybdenum catalysts during preparation

WEI Min ^1,2 ,
CHENG Li-jun ^1,2 ,
YUAN Shan-liang ¹ ,
BO Qi-fei ¹ ,
ZHANG Biao ^1,, ,
JIANG Yi ^1,,

1.
Chinese Academy of Sciences, Chengdu Institute of Organic Chemistry, Chengdu 610041, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: ZHANG Biao, yjiang@cioc.ac.cn JIANG Yi, zhangbiao07@139.com
Received Date: 29 November 2018
Revised Date: 29 December 2018

Fund Project: Sichuan Science and Technology Program 2018GZ0314The project was supported by Sichuan Science and Technology Program (2018GZ0314) and Project of CAS "Light of West China" program, 2014

Figures(5)

A series of iron-molybdenum catalysts were prepared by controlling the acidity of ammonium molybdate solution in coprecipitation. The structure of the catalysts was characterized by N₂ adsorption-desorption, Raman, XRD, SEM and H₂-TPR. The Fe-Mo catalysts prepared with different pH values were investigated for their performance in methanol oxidation to formaldehyde reaction. The results showed that the acidity of ammonium molybdate solution affects the particle size, morphology, distribution and enrichment of iron and molybdenum species on the surface of the catalyst. Appropriate acidity of ammonium molybdate solution can optimize the ratio of MoO₃ and Fe₂(MoO₄) species on the catalyst surface, and improves the catalytic oxidation performance, which is conducive to the improvement of yield and selectivity of formaldehyde.
- iron-molybdenum catalyst,
- methanol oxidation,
- formaldehyde,
- pH value
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