Analysis and Study on Polarization during Water Electrolysis Hydrogen Production
| Autor: | Lih-Wu Hourng, Wen-Nong Hsu, Ming-Yuan Lin, Te-Hui Tsai, Shin-Hua Huang |
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| Rok vydání: | 2016 |
| Předmět: |
Electrolysis
Electrolysis of water Chemistry 020209 energy General Chemical Engineering Analytical chemistry 02 engineering and technology General Chemistry Electrolyte 021001 nanoscience & nanotechnology law.invention Dielectric spectroscopy law Electrode 0202 electrical engineering electronic engineering information engineering 0210 nano-technology Polarization (electrochemistry) Polymer electrolyte membrane electrolysis Hydrogen production |
| Zdroj: | Chemical Engineering Communications. 204:168-175 |
| ISSN: | 1563-5201 0098-6445 |
| DOI: | 10.1080/00986445.2016.1250079 |
| Popis: | During a time of high energy consumption, water electrolysis is currently one of the alternative energy sources. At low voltages and low concentrations where activation and concentration polarizations are most dominant, the polarization effects are most significant and the electrolysis is most inefficient. Whereas at high voltages and high concentrations, the activation and concentration polarizations will quickly diminish, producing better electrolysis results. We can see from the empirical data that when the electrode distance is 2 mm and the electrolyte is 30 wt% KOH, a shorter electrode distance with an appropriate actual electrolysis voltage will produce lower polarization impedance values and hence the best efficiency in electrolysis. This study used electrochemical impedance spectroscopy (EIS) to detect relevant data on resistance. Applying it in the field of water electrolysis can provide another method to detect and clarify the phenomenon of polarization and impedance. |
| Databáze: | OpenAIRE |
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