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Open AccessArticle

Effect of Mo Dispersion on the Catalytic Properties and Stability of Mo–Fe Catalysts for the Partial Oxidation of Methanol

Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
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Author to whom correspondence should be addressed.
Molecules 2020, 25(10), 2410; https://doi.org/10.3390/molecules25102410
Received: 13 February 2020 / Revised: 15 May 2020 / Accepted: 19 May 2020 / Published: 21 May 2020
(This article belongs to the Section Physical Chemistry)
Mo–Fe catalysts with different Mo dispersions were synthesized with fast (Cat-FS, 600 r·min−1) or slow stirring speed (Cat-SS, 30 r·min−1) by the coprecipitation method. Improving the stirring speed strengthened the mixing of the solution and increased the dispersion of particles in the catalyst, which exhibited favorable activity and selectivity. The byproduct (dimethyl ether (DME)) selectivity increased from 2.3% to 2.8% with Cat-SS, while it remained unchanged with Cat-FS in a stability test. The aggregation of particles and thin Mo-enriched surface layer decreased the catalyst surface area and slowed down the reoxidation of reduced active sites with Cat-SS, leaving more oxygen vacancies which promoted the formation of DME by the nonoxidative channel. View Full-Text
Keywords: Mo–Fe catalyst; Mo dispersion; stability; oxygen vacancies Mo–Fe catalyst; Mo dispersion; stability; oxygen vacancies
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MDPI and ACS Style

Zhang, S.; Han, M. Effect of Mo Dispersion on the Catalytic Properties and Stability of Mo–Fe Catalysts for the Partial Oxidation of Methanol. Molecules 2020, 25, 2410.

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