A low-temperature electro-thermochemical water-splitting cycle for hydrogen production based on LiFeO2/Fe redox pair
| Autor: | Xianjun Liu, Shuzhi Liu, Zhihua Zhang, Sun Jing, Baochen Cui, Jianing Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment business.industry Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Redox Isothermal process 0104 chemical sciences Chemical energy Fuel Technology Chemical engineering Water splitting Thermochemical cycle 0210 nano-technology business Thermal energy Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 45:20800-20807 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.02.087 |
| Popis: | The thermochemical water-splitting cycles have been paid more attention in recent years because they directly convert thermal energy into stored chemical energy as H2. However, most thermochemical cycles require extremely high temperatures as well as a temperature switch between reduction and oxidation steps, which are the main obstacles for their development. Herein, we introduced an electrochemical reaction into the thermochemical cycle and established a novel two-step water-splitting cycle based on LiFeO2/Fe redox pair. The two-step water-splitting process involves a cyclic operation of electrochemical reduction and water-splitting steps. The feasibility of the water-splitting cycle for the hydrogen production was thermodynamically and experimentally investigated. A mechanism of hydrogen production based on LiFeO2/Fe redox pair was developed. Compared with the traditional high-temperature thermochemical cycles, the electrochemical reduction and water-splitting steps of the process can be isothermally operated in the same cell at a relatively low temperature of 500 °C. The main advantages of the cycle are not only easily available heat sources without involvement of the associated engineering and materials issues, but also without any temperature swings. This is a promising method to achieve water splitting for hydrogen production in the future. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect