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. 2021 Dec 22;12(1):602–610. doi: 10.1039/d1ra05804e

XPS results of Cu/TiO2, Re/TiO2 and Cu–Re(1 : 1)/TiO2 catalysts.

Catalyst Cu 2p3/2 (2p1/2) (BE/eV) Re 4f7/2 (4f5/2) (BE/eV)
Cu0 Re0 ReO2 ReO3 Re2O7
Cu/TiO2 931.7(951.6)
Cu–Re(1 : 1)/TiO2 932.0(951.9) 40.3(43.0) 42.0(44.2) 45.8(48.2)
Re/TiO2 42.2(44.6) 44.3(48.7) 46.2(48.4)