“…2e , the fitted XPS spectrum of Ce 3d, the two peaks at 897.3 and 915.63 eV corresponded to Ce IV 3d 5/2 and Ce IV 3d 3/2 , respectively, which were ascribed to CeO 2 . 41 Meanwhile, the other two peaks at 881.47 and 900 eV could be assigned Ce III 3d 5/2 and Ce III 3d 3/2 , respectively. The two peaks at 74.55 and 77.89 eV could be assigned to Pt 4f 7/2 and Pt 4f 5/2 , respectively ( Fig.…”