7.3.1 Operando spectroscopic study of the EtOH gas sensing mechanism of In2O3

S. Sänze & C. Hess
By using operando Raman spectroscopy, we studied the ethanol gas sensing mechanism of indium oxide. New Raman bands due to adsorbates at 937, 2868, 2939^cm-1 as well as changes of the Raman spectrum of the indium oxide sensor at 407, 3644 and 3658^cm-1 were detected. The adsorbates are identified as acetate and formate species and the changes of the indium oxide bands originate from reduced indium oxide. With FTIR gas-phase spectroscopy, the gas products of...