Hydrogenation activity with

The activity of all catalysts were evaluated for the CO hydrogenation reaction. The histogram shown in Fig. 8 reveals that the bimetallic Co-Mo nitride system has appreciable hydrogenation activity with exception of samples 2 and 4. This apparent anomaly was probably due to the relatively high heat of adsorption for these two catalysts, which offered strong CO chemisorption but with imfavourable product release. 

As a final example of catalytic hydrogenation activity with polymer-stabilized colloids, the studies of Cohen et al. should be mentioned [53]. Palladium nanoclusters were synthesized within microphase-separated diblock copolymer films. The organometallic repeat-units contained in the polymer were reduced by exposing the films to hydrogen at 100 °C, leading to the formation of nearly monodisperse Pd nanoclusters that were active in the gas phase hydrogenation of butadiene. 

Figure 4 Correlation of relative hydrogenation activity with Pd-dispersion...

Use of the new proprietary support leads to a better toluene hydrogenation activity with a sulfided standard 3wt% CoO and 14wt% M0O3 catalytic phase. The TEM experiments would show that the use of the new proprietary support leads to an increase of the intrinsic activity of each site. 

O. 8 and 1.0) were prepared by Co-precipitation method. Characterisation was done by X-ray phase analysis and DRS studies and by measurements of surface area and electrical conductivity. The amount of metallic copper and monovalent copper were estimated by reversible adsorption of CO respectively. Hydrogenation of nitrobenzene to aniline was carried out at 250°C in a fixed bed flow type reactor. Comparison of hydrogenation activity with CO adsorption data show that monovalent copper is more active than metallic copper for the hydrogenation of nitrobenzene. 

Fig. 13. Correlation of CO hydrogenation activity with bulk Cu mole fraction, for perovskites and lanthana-supported catalysts (H2/CO = 2, P = 10.6 atm, T = 573K). With permission from Brown Bourzutschky et al.

Figure 16. The processes involved in hydrogen activation with immobilized hydrogenase.

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