Synergistic effects of Zn and Pd species in TiO2 towards efficient photo-reduction of CO2 into CH4†
Yaan
Cao 
*a
*a
Abstract
A Zn and Pd co-modified TiO2 photocatalyst exhibits remarkably enhanced photocatalytic activity upon reduction of CO2 into CH4. Owing to the synergistic effect of unique O–Zn–Cl and O–Pd–O species, TiO2–PdX–ZnY presents enhanced visible absorption and efficient charge carrier separation. It can be deduced from theoretical calculations and experimental results that the energy levels of O–Zn–Cl and O–Pd–O satisfy the redox potential of CO2 reduction, improving the photocatalytic performance. These results suggest that introducing multi-surface species to produce synergetic effects is a feasible route for efficient photocatalysis.
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