| SI Ying-ying,REN Ya-dong,ZHAO Yong-qiang,YAN Ye-xiang,XIE Guang-wen,WANG Gui-xue,LIU Xin.Electrodeposited Ni-Fe-P Amorphous Alloy as Cathode Material for Hydrogen Evolution and Its De-alloying Treatment[J],49(9):175-181 |
| Electrodeposited Ni-Fe-P Amorphous Alloy as Cathode Material for Hydrogen Evolution and Its De-alloying Treatment |
| Received:February 10, 2020 Revised:September 20, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.09.019 |
| KeyWord:electrodeposition low temperature de-alloying nickel-iron-phosphorus coating hydrogen evolution performance alkaline solution |
| Author | Institution |
| SI Ying-ying |
Qingdao University of Science and Technology, Qingdao , China |
| REN Ya-dong |
Qingdao University of Science and Technology, Qingdao , China |
| ZHAO Yong-qiang |
Qingdao University of Science and Technology, Qingdao , China |
| YAN Ye-xiang |
Qingdao University of Science and Technology, Qingdao , China |
| XIE Guang-wen |
Qingdao University of Science and Technology, Qingdao , China |
| WANG Gui-xue |
Qingdao University of Science and Technology, Qingdao , China |
| LIU Xin |
Qingdao University of Science and Technology, Qingdao , China |
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| Abstract: |
| The work aims to improve the catalytic hydrogen evolution of Fe electrode. The amorphous Ni-Fe-P coatings were electrodeposited on the surface of Fe substrate at a lower temperature. The effects of electrodeposition current density and de-alloying time on the Ni-Fe-P/Fe electrode in alkaline electrolyte were investigated. The morphology, element distribution and phase structure of the coatings were analyzed by scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. A series of performance tests were carried out on the electrode by electrochemical workstation in alkaline solution. The Ni-Fe-P amorphous alloy coating with dense and uniform element distribution was successfully prepared on the surface of Fe electrode at 10 ℃. The electrocatalytic performance of the obtained Ni-Fe-P/Fe electrodes was better than that of the Fe electrode. The overpotential of the Ni-Fe-P/Fe electrode prepared under the condition of J=30 mA/cm2 at a hydrogen evolution current density of 10 mA/cm2 was 174.2 mV, about 466.2 mV lower than that of the Fe electrode. For the Ni-Fe-P/Fe electrode prepared under the same conditions, after 240 s de-alloying treatment, the overpotential of the electrode was only 121.6 mV, about 518.8 mV lower than that of the Fe electrode. The electrodeposited Ni-Fe-P amorphous alloy coating can significantly improve the hydrogen evolution performance of the Fe electrode. With the increase of the deposition current density, the hydrogen evolution overpotential of the Ni-Fe-P/Fe electrode decreases, and the electric double layer capacitance and the electrochemical working surface area increase. After proper de-alloying of the electrode, the three-dimensional porous structure formed can reduce the charge transfer resistance of the electrode and the hydrogen evolution overpotential of the electrode. |
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