Methanatlon activity

All of the supported bimetallic catalysts studied show a sharp drop in methanatlon activity when the Ru/M ratio falls below four. 

Surface and bulk characterization were carried out using electron spectroscopy for chemical analysis (ESCA or XPS) and x-ray diffraction (XRB). The results will be discussed In relation to methanatlon activity. 

Binary Alloys. The reported methanatlon activity ( ) of the oxidized alloys, expressed as the amount of CO consumed/gs. Is plotted In Figure 3B as a function of their nickel content. The activity of... 

Comparison of the surface analysis and methanatlon activity of (Nl Th ) alloys (Figure 6) shows that there Is some Interdependence betweeK the surface concentration of Nl and activity high Nl surface concentration generally results In greater methanatlon activity. 

Methanatlon Studies. Because the most effective way to determine the existence of true bimetallic clusters having mixed metal surface sites Is to use a demanding catalytic reaction as a surface probe, the rate of the CO methanatlon reaction was studied over each series of supported bimetallic clusters. Turnover frequencies for methane formation are shown In Fig. 2. Pt, Ir and Rh are all poor CO methanatlon catalysts In comparison with Ru which Is, of course, an excellent methanatlon catalyst. Pt and Ir are completely inactive for methanatlon In the 493-498K temperature range, while Rh shows only moderate activity. 

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