CuxAgyInzZnkSm solid solutions customized with RuO2 or Rh1.32Cr0.66O3 co-catalyst display visible light-driven catalytic activity for CO2 reduction to CH3OH

CuxAgyInzZnkSm solid solutions, customized with RuO2 or Rh1.32Cr0.66O3 co-catalyst with a small energy band gap <2 eV were studied for photocatalytic CO2 reduction to CH3OH under visible light. Significantly, 118.5 mu mol g(-1) h(-1) CH3OH yield was obtained with RuO2/Cu0.30Ag0.07In0.34Zn1.31S2 under hydrogen effect.