%0 Journal Article %T Preparation of Ni-P-CeO2 electrode and study on electrocatalytic properties for hydrogen evolution reaction %J Hydrogen, Fuel Cell & Energy Storage %I Iranian Research Organization for Science and Technology (IROST) %Z 2980-8537 %A Madram, Ali Reza %A Mohebbi, Mehdi %A Nasiri, Mohammad %A Sovizi, Mohammad Reza %D 2018 %\ 07/01/2018 %V 5 %N 1 %P 1-11 %! Preparation of Ni-P-CeO2 electrode and study on electrocatalytic properties for hydrogen evolution reaction %K Hydrogen evolution reaction (HER) %K Ni-P-CeO2 %K electrocatalytic activity %K Electrochemical Impedance Spectroscopy (EIS) %R 10.22104/ijhfc.2018.2758.1167 %X In this study ternary Ni-P-CeO2 catalysts were first synthesized by the Co-electrodeposition method on a copper substrate and then characterized by means of microstructural and electrochemical techniques toward a hydrogen evolution reaction (HER). Also, for comparison other catalysts such as Ni-CeO2, Ni-P, and Ni were prepared and characterized by the same methods. The microstructure of the investigated catalysts was characterized by scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectrometry (EDX) and X-ray diffraction (XRD) methods. The electrochemical efficiency of all investigated catalysts was studied based on electrochemical data obtained from electrochemical impedance spectroscopy (EIS) and steady-state polarization Tafel curves in 1 M NaOH solution. The results showed that microstructural properties play an essential role in the high electrocatalytic activity of Ni-P-CeO2. Furthermore, it was observed that the HER mechanism for all investigated systems was Volmer-Heyrovsky with a Volmer step as the rate determining step (RDS). The Ni-P-CeO2 catalyst, as the most active catalyst in this work, was characterized by an exchange current density of j0=168.0 µAcm-2, a Tafel slope of b=-162.0 mV.dec-1, and overpotential at j0=250 mAcm-2; η250=-143.0 mV.    %U https://hfe.irost.ir/article_663_02ea45f7bccfa3e22d9dfd08443f6109.pdf