Table 2.

Oxides species formed on Cu and Cu-based alloys after 2.3 eV HOMB irradiation at $T_{\mathrm{S}}=300\text{K}$.

	${\text{Cu}}_3\text{Pd}(111)$	${\text{Cu}}_3\text{Pt}(111)$	Cu(111)14, 15	${\text{Cu}}_3\text{Au}(111)$17–20
300 K	CuO	CuO	${\text{Cu}}_2$O	Only chemisorbed O
500 K	${\text{Cu}}_2$O	CuO	${\text{Cu}}_2$O	${\text{Cu}}_2$O