Lactose, oxidation

J.-P., Kuusisto, J., Kustov, L.M., and Murzin, D. (2007) Application of in-situ catalyst potential measurements for estimation of reaction performance D-lactose oxidation over Au and Pd catalysts. Chem. Eng.J., 134, 153-161. 

Verhaar et al.18 described the HPLC analysis of reaction mixtures of lactose (oxidation and degradation). In this work, a refractive index (RI) detector coupled with a variable wavelength ultraviolet (UV) detector at 212 nm was used to monitor the... 

Incompatibilities poorly compatible with citric acid and saccharose solutions. Incompatible with ascorbic acid, gelatin, glucose, lactose, oxidizing agents, and saturated sodium bicarbonate solution. 

Different voltammograms were recorded at various concentrations of metal adatoms (lead, bismuth, and thallium) in the presence of 10 mM lactose in 0.1 M Na2C03-NaHC03- Their optimized concentrations gave evidences of the electrocatalytic effect by the ratio / t rvi//pt for the current densities, with and without adatoms, versus electrode potential (Figure 21.22). In fact, the presence of metal adatoms at the platinum surface induces a shift of the lactose oxidation peaks toward lower potential and an increase in the current densities. 

FIGURE 21.22 Electrocatalytic effect of metal adatoms on lactose oxidation in carbonate buffer during the... 

Lactose oxidation was also used as a test reaction for catalyst screening (Figure... 

Figure 9. Selectivity towards lactose oxidation products over Pd/HPS catalysts.

Fig. 7-30. Chlorine dose-residual curves for lactose oxidation.

Fig. 7.30 Lactose oxidation at various pH on Au (2 wt%)/Al20, m—0.05 g, 70°C, oxygen flow rate 2.5 mL/min. (A) Concentration profile of lactobionic acid concentration (B) potential versus lactobionic acid yield. (From D.Yu. Murzin, E.V. Murzina, A.V. Tokarev, J.-P. Mikkola, Russ. J. Electrochem. 45 (2009) 1091—1101. Copyright 2009 Springer).

It can be suggested that lactose oxidation takes place on edges and perimeter sites while oxygen reduction in alkahne media involves charge transfer on different sites, for example, on terraces. The following sequence of stages is suggested (active sites denoted as ) ... 

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