期刊
CHEMSUSCHEM
卷 10, 期 1, 页码 112-118出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201601360
关键词
alkali earth metals; carbon dioxide fixation; electron donor; energy conversion; photocatalysis
资金
- ENEOS hydrogen foundation
- [24246131]
- Grants-in-Aid for Scientific Research [24107004] Funding Source: KAKEN
Doped NaTaO3 (NaTaO3 : A, where A= Mg, Ca, Sr, Ba, or La) has arisen as a highly active photocatalyst for CO2 reduction to simultaneously form CO, H-2, and O-2 using water as the electron donor when used with an Ag cocatalyst, under UV irradiation, and with 1 atm (0.1 MPa) of CO2. The ratio of the number of reacted electrons/holes was almost unity, indicating that water was consumed as the electron donor. A liquid-phase reduction method for loading of the Ag cocatalyst was superior to photodeposition and impregnation methods. The Ag cocatalystloaded NaTaO3: Ba was the most active photocatalyst in water with no required additives. The addition of bases, such as hydrogencarbonate, was effective to enhance the CO formation for Mg-, Ca-, Sr-, Ba-, and La-doped NaTaO3 photocatalysts with an Ag cocatalyst. Ca-and Sr-doped NaTaO3 photocatalysts showed especially high activity along with the Ba-doped photocatalyst in the aqueous NaHCO3 solution. The selectivity for the CO formation [CO/(CO+H-2)] on Ca-, Sr-, and Ba-doped NaTaO3 photocatalysts with Ag cocatalyst reached around 90%.
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