Optimized photoelectrochemical tandem cell for solar water splitting
Autor: | Carsten Spenke, Tânia Lopes, António Vilanova, Michael Wullenkord, Adélio Mendes |
---|---|
Přispěvatelé: | Faculdade de Engenharia |
Jazyk: | portugalština |
Rok vydání: | 2017 |
Předmět: |
Materials science
Hydrogen hydrogen production Continuous operation Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 7. Clean energy 01 natural sciences Corrosion Solar water phtoelctrochemistry General Materials Science Hydrogen production Tandem Renewable Energy Sustainability and the Environment business.industry Hematite 021001 nanoscience & nanotechnology solar 6. Clean water 0104 chemical sciences chemistry visual_art visual_art.visual_art_medium Optoelectronics water Splitting 0210 nano-technology business |
Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
Popis: | In the field of photoelectrochemical (PEC) hydrogen production most studies focus on developing efficient nanostructured materials and less attention is given to the optimization of PEC devices. However, the reactor design greatly influences the overall performance of these devices and it is a key element to turn PEC hydrogen generation competitive and marketable. In this work, a 50 cm2 tandem PEC-PV cell, named CoolPEC cell (compact, optimized, open light PEC cell), was designed and optimized for continuous operation comprising improved key features: i) an open path for the sunlight to reach a PV cell placed at the back of the PEC cell; ii) a photoelectrode that simultaneously is one of the windows of the cell; iii) an integrated manifold to feed the electrolyte. CFD simulations were performed to improve the reactor design assuring good heat dissipation and an efficient collection of evolved oxygen and hydrogen in separated compartments. The CoolPEC cell presented a stable performance over 42 days (1008 h) in a continuous operation mode. The 50 cm2 hematite photoelectrode produced ca. 0.45 mA cm−2 at a bias potential of 1.6 V provided by two silicon heterojunction (SHJ) solar cells, under 1000 W m−2 and with constant electrolyte feeding at 45 °C. SEM, EDS and ICP analyses confirmed that the hematite photoelectrode was resistant to the accelerated corrosion promoted by the operating conditions. |
Databáze: | OpenAIRE |
Externí odkaz: |