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

WEI Min; CHENG Li-jun; YUAN Shan-liang; BO Qi-fei; ZHANG Biao; JIANG Yi

Volume 47 Issue 2

Feb. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(2): 209-214

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.

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.

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.

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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-liang¹,
BO Qi-fei¹,
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

Funds:

Sichuan Science and Technology Program 2018GZ0314

More Information

Corresponding author: ZHANG Biao, Tel: 028-85229457, 13980044963, E-mail: yjiang@cioc.ac.cn; JIANG Yi, E-mail: zhangbiao07@139.com
Received Date: 2018-11-29
Rev Recd Date: 2018-12-29

Available Online: 2021-01-23

Publish Date: 2019-02-10

Abstract

Abstract

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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References(16)

References

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