Three-dimensionally interconnected titanium foam anode for an energy-efficient zero gap-type chlor-alkali electrolyzer
| Autor: | Chi-Yeong Ahn, Dong Woog Lee, Ji Hyun Lee, Yong-Hun Cho, Yung-Eun Sung, In Kee Park, Chang Hyun Lee |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Electrolysis
Materials science Hydrogen Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Porosimetry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences law.invention Anode Fuel Technology chemistry X-ray photoelectron spectroscopy Chemical engineering law Electrode 0210 nano-technology Titanium |
| Zdroj: | International Journal of Hydrogen Energy. 44:16079-16086 |
| ISSN: | 0360-3199 |
| Popis: | Chlor-alkali (CA) electrolysis is used to generate high-purity (>99.999%) chlorine and hydrogen gas, in addition to caustic soda (NaOH). Despite its usefulness, the electrochemical process consumes a large amount of electric energy. In this study, Ti foam was employed as the anode, and its morphological and electrochemical properties were compared with those of a dimensionally stable anode (DSA), which is commonly used in CA industries. The morphology and chemical composition of these anodes were examined with scanning electron microscopy (SEM). Porosity was determined by mercury porosimetry. Surface elemental characterization and crystallographic analysis of the electrodes were performed using X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), respectively. The electrochemical performances of the cells employing each electrode were evaluated in terms of chlorine and hydrogen production rate, energy consumption, and hydrogen current efficiency. Finally, chronopotentiometry was carried out to verify the potential of the Ti foam as an energy-efficient anode. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect