Combining autoclave and LCWM reactor studies to shed light on the kinetics of glucose oxidation catalyzed by doped molybdenum-based heteropoly acids

Voß D, Ponce S, Wesinger S, Etzold BJ, Albert J (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Book Volume: 9

Pages Range: 29347-29356

Journal Issue: 50

DOI: 10.1039/c9ra05544d

Abstract

In this work we combined kinetic studies for aqueous-phase glucose oxidation in a high-pressure autoclave setup with catalyst reoxidation studies in a liquid-core waveguide membrane reactor. Hereby, we investigated the influence of Nb- and Ta-doping on Mo-based Keggin-polyoxometalates for both reaction steps independently. Most importantly, we could demonstrate a significant increase of glucose oxidation kinetics by Ta- and especially Nb-doping by factors of 1.1 and 1.5 compared to the classical HPA-Mo. Moreover, activation energies for the substrate oxidation step could be significantly reduced from around 80 kJ mol^-1 for the classical HPA-Mo to 61 kJ mol^-1 for the Ta- and 55 kJ mol^-1 for the Nb-doped species, respectively. Regarding catalyst reoxidation kinetics, the doping did not show significant differences between the different catalysts.

Authors with CRIS profile

Involved external institutions

Technische Universität Darmstadt Germany (DE)

How to cite

APA:

Voß, D., Ponce, S., Wesinger, S., Etzold, B.J., & Albert, J. (2019). Combining autoclave and LCWM reactor studies to shed light on the kinetics of glucose oxidation catalyzed by doped molybdenum-based heteropoly acids. RSC Advances, 9(50), 29347-29356. https://doi.org/10.1039/c9ra05544d

MLA:

Voß, Dorothea, et al. "Combining autoclave and LCWM reactor studies to shed light on the kinetics of glucose oxidation catalyzed by doped molybdenum-based heteropoly acids." RSC Advances 9.50 (2019): 29347-29356.

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