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• W2910366713 abstract "Ag, Pd, Au, Cu2O as cocatalysts were loaded on the layered H2SrTa2O7 (HST) for photocatalytic CO2 reduction with H2O. The characterization revealed that cocatalysts loaded on the surface of HST can effectively promote the separation of photogenerated electrons and holes due to the formation of Schottky barrier or p-n junction, thus enhancing photocatalytic activity. Of note, Ag, Pd, Au, Cu2O loading exhibited obviously different performance on promoting photocatalytic activity of HST toward CO evolution and H2 evolution because of the different overpotentials of CO evolution and H2 evolution on loaded photocatalysts. Cocatalysts with low overpotentials of CO or H2 evolution act as active sites for CO or H2 evolution, thus controlling the selectivity toward CO or H2. The Au/HST exhibited high activity for only H2 evolution (17.5 μmol g−1 h−1) due to relative low overpotential for H2 evolution (0.67 V) while the Cu2O/HST exhibited high activity only for CO evolution (0.23 μmol g−1 h−1) due to relative low overpotential for CO evolution (0.40 V). The Pd/HST sample exhibits high photocatalytic activity for both CO and H2 evolution rates due to the low overpotential for CO and H2 evolution, reaching 4.0 and 4.7 times of bare HST, respectively. This work here gives an in-depth understanding of the effect of cocatalysts on promoting photocatalytic activity and selectivity and can also give guidance to design photocatalysts with high activity and selectivity for photocatalytic CO2 reduction with H2O." @default.
• W2910366713 created "2019-01-25" @default.
• W2910366713 creator A5061403079 @default.
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• W2910366713 date "2019-02-01" @default.
• W2910366713 modified "2023-10-15" @default.
• W2910366713 title "Metal (oxide) modified (M= Pd, Ag, Au and Cu) H2SrTa2O7 for photocatalytic CO2 reduction with H2O: The effect of cocatalysts on promoting activity toward CO and H2 evolution" @default.
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• W2910366713 doi "https://doi.org/10.1016/j.ijhydene.2018.12.166" @default.
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