| QIN Hai-sen,WANG Shu-liang,JING Yang-zhong,NING Yuan-cheng,LIU Li.Effects of Different Stirring Methods on Microstructure and Electro-catalytic Hydrogen Evolution Performance of Ni-Fe-Co Coatings[J],47(6):38-43 |
| Effects of Different Stirring Methods on Microstructure and Electro-catalytic Hydrogen Evolution Performance of Ni-Fe-Co Coatings |
| Received:December 12, 2017 Revised:June 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.06.006 |
| KeyWord:electrodeposition Ni-Fe-Co alloy stirring methods hydrogen evolution activity electrochemical test |
| Author | Institution |
| QIN Hai-sen |
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
| WANG Shu-liang |
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
| JING Yang-zhong |
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
| NING Yuan-cheng |
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
| LIU Li |
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu , China |
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| Abstract: |
| The work aims to obtain a Ni-Fe-Co electrode exhibiting higher electro-catalytic activity of hydrogen evolution. Based upon electro-deposition, Ni-Fe-Co coatings were prepared in different stirring methods. Microstructure, composition and phase of the coatings was investigated with scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffractometer (XRD), respectively. The effects of different stirring methods on electro-catalytic activity of hydrogen evolution were studied by adopting electrochemical test analysis technology. All the three kinds of coating electrodes were simple solid solution BCC structures. However, the coating electrode prepared under magnetic stirring condition had a more compact and uniform surface structure, and also larger real surface area, which was 6 times and 2 times as much as that of the electrodes prepared under no-stirring condition and ultrasonic stirring condition, respectively. At the potential of −1.6 V, current density of the coating electrode prepared under magnetic stirring condition was 173 mA/cm−2, which was significantly higher than that of the other two coating electrodes. In addition, its AC current density (45.9 μA/cm−2) was 2 times and 3 times as much as that of the coating electrodes prepared under the no-stirring condition and ultrasonic stirring condition, respectively. Magnetic stirring can effectively increase specific surface area of the coatings and further improve the coatings’ electro-catalytic activity of hydrogen evolution. |
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