The synthesis of ZnO/SrTiO3 composite for high-efficiency photocatalytic hydrogen and electricity conversion
- Resource Type
- Authors
- Bao Dong; Jing Zhang; Yan Wu; Huaibing Song; Chunjie Yan
- Source
- International Journal of Hydrogen Energy. 43:12627-12636
- Subject
- Materials science
Hydrogen
Renewable Energy, Sustainability and the Environment
Open-circuit voltage
Energy Engineering and Power Technology
chemistry.chemical_element
02 engineering and technology
Electrolyte
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Fuel Technology
Chemical engineering
chemistry
Hydrogen fuel
Photocatalysis
Solid oxide fuel cell
0210 nano-technology
Semiconduction
Short circuit
- Language
- ISSN
- 0360-3199
Heterogeneous ZnO–SrTiO3 nanocomposites were synthesized via a facile hydrothermal method. The highest H2 production rate, 1317.44 μmol g−1 within 5 h under solar-light irradiation was achieved for the Zn/Sr ratio of 9:1 of the ZnO–SrTiO3. More interestingly though the ZnO–SrTiO3 is a semiconducting system, it could be used as an electrolyte in the low temperature solid oxide fuel cell without electronic conducting short circuiting problem. This device displayed an open circuit voltage of 1.14 V and reached the maximum power density of 564 mW cm−2 at 550 °C. These results are attributed to the enhanced separation of the charge-hole pairs by the heterogeneous structure of ZnO–SrTiO3 nanocomposites, which possess obvious both heterogeneously ionic and semiconduction. This new discovery indicates a good promising candidate for both solar and hydrogen energy conversions.