Catalytic oxidation of methanol on Mo/Al2O3 catalyst: An EPR and Raman/infrared operando spectroscopies study

Operando Raman study of propane oxidation over alumina-supported V–Mo–W–O catalysts

“…When reaction temperature increases, a broad Raman band becomes evident near 830 cm À1 . Similar spectra were obtained with Mo/Al 2 O 3 catalysts during methanol oxidation in absence of oxygen by Payen and co-workers [36]. They attributed the band near 830 cm À1 to reduced sites [36]; in accordance with other authors that associate Raman bands in the 800-950 cm À1 region with reduced molybdenum oxide species [17][18]37].…”

Graphene-supported platinum catalysts for fuel cells

“…Infrared absorption/ reflection spectroscopy (IRS) [100], surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) [101], electron plasmon resonance (EPR) [102], fast Fourier transform infrared spectroscopy (FTIRS) [103], attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIRS) [104] and Raman spectroscopy [105] are spectroscopic techniques used for in situ probing of electrochemical systems. FTIRS and Raman are combined with electrochemical methods to determine the selectivity of electrocatalysts.…”

Structure and reducibility of titania-supported monomeric and dimeric molybdenum oxide entities studied by DFT calculations

“…Using a combination of Operando Raman and EPR spectroscopy, Brandhorst et al [16] have shown that the reduction to Mo 5+ by methanol is possible at moderate temperature for alumina-supported molybdenum oxide and that the catalytic activity can be correlated with the formation of these paramagnetic centres. They concluded that at least two molybdenum centres are required to perform methanol oxidation (a two electrons oxidation) and confirmed that isolated species are inactive as they cannot be reduced to Mo 5+ .…”