ATR/FTIR spectra of all systems yielded a complex picture – Figure 6. There are no significant differences among spectra of different composition samples for respective temperatures (we present only spectra for 16.4% Pt). Only changes in bands intensity form Pt species can be observed, but in general they are very similar for varying Pt content. Powders show broad bands between 500 and 772 cm−1 (Figure 6a,b), which are due to Sn–OH bond stretching. The peak in the region of 1350 cm−1 (h) is a complex band from the residual C-H groups and from hexachloroplatinic acid. The H–O–H in-plane deformation is observed at 1634 cm−1 (i). In the region of 1700 cm−1 (j), we observe a peak associated with the presence of acetic acid [16]. A broad band at 3400 cm−1 (k) is attributed to the O–H stretching vibrations from residual alcohol, water, and SnO–H bonds.