It would be good to see the data (even as just an image). One think is to be careful of your data, metallic Pt is 71.1 eV, but that can shift upwards with particle size for example, but nowhere near 74.5 eV.
PtO is ~ 74 eV, Pt(OH)2 is ~72.5 eV and PtO2 ~ 75 eV.
What is the biding energy of yout Al2p peak? What are you calibrating the data against? Carbon may not be the best here, so the Al2p, Al2s or O1s may be better here. Also recall that Pt4f overlap with the Al2p peak, so you have to be certian in what you’re looking at too!
Note that if is been fired in an engine, its liekly to have some oxide present unless you expect a very reducing environment