Abstract: | Abstract Mixed-valent tetranuclear platinum complex, Pt4(NH3)8(C4H6NO)4] n+ (n = 4, 5, 6, 8; C4H6NO = deprotonated α-pyrrolidone), is used as a homogeneous hydrogen-producing catalyst in a photochemical model system containing EDTA as an electron donor, Ru(bpy)3 2+ as a sensitizer and methylviologen (MV2+) as an electron relay. |