TPR AND FTIR STUDY OF NITRIDED MOLYBDENA-ALUMINA CATALYST

Nitrided 11.7% and 97.1% molybdena-alumina catalysts have been investi gated using temperature-programmed reaction with hydrogen (TPR) and di ffuse reflectance FTIR connected to a mass spectrometer with the aid o f XRD analysis. From the TPR and XRD analyses, gamma-Mo2N was formed o n the surface of the 11.7% and 97.1% Mo/Al2O3 nitrided at 700 degrees C. On the basis of the NH3-TPD and IR spectroscopies, much more Lewis acid sites than Bronsted acid sites are present on the surface of the nitrided molybdena-alumina.