Electrochemical characterization of Raney nickel electrodes prepared by atmospheric plasma spraying for alkaline water electrolysis
| Autor: | Jieun Kim, Chu Sik Park, Seong Uk Jeong, Kyoung Soo Kang, Jeong Won Kim, Young Ho Kim, Ki Bong Lee, Kyeong Ho Baik, Ki Kwang Bae |
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| Rok vydání: | 2019 |
| Předmět: |
Nial
Tafel equation Materials science Electrolysis of water General Chemical Engineering Alkaline water electrolysis 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Raney nickel 0104 chemical sciences chemistry.chemical_compound Chemical engineering chemistry Coating Electrode engineering 0210 nano-technology computer computer.programming_language |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 70:160-168 |
| ISSN: | 1226-086X |
| DOI: | 10.1016/j.jiec.2018.10.010 |
| Popis: | A Raney Ni electrode was prepared by the simple and economical atmospheric plasma spraying method. It showed excellent performance for hydrogen evolution reaction (HER), as indicated by a Tafel slope of 54 mV/dec and overvoltage of 108 mV at 300 mA/cm2. The Ni–Al alloy coating contained a NiAl phase, which has a very slow Al leaching rate in alkaline solution. H2 heat treatment of the electrode enhanced the uniformity of Al distribution in the coating and adhesion of the coating to the substrate. However, the HER performance did not improve and the electrode was rendered more structurally vulnerable to deactivation. |
| Databáze: | OpenAIRE |
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