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

Dorothea Voß, Sebastian Ponce, Stefanie Wesinger, Bastian J.M. Etzold, Jakob Albert

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

10 Citas (Scopus)

Resumen

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.

Idioma originalInglés
Páginas (desde-hasta)29347-29356
Número de páginas10
PublicaciónRSC Advances
Volumen9
N.º50
DOI
EstadoPublicada - 2019
Publicado de forma externa

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