TY - JOUR ID - 663 TI - Preparation of Ni-P-CeO2 electrode and study on electrocatalytic properties for hydrogen evolution reaction JO - Hydrogen, Fuel Cell & Energy Storage JA - HFE LA - en SN - 2980-8537 AU - Madram, Ali Reza AU - Mohebbi, Mehdi AU - Nasiri, Mohammad AU - Sovizi, Mohammad Reza AD - Faculty of Chemistry and Chemical Engineering, Malek-Ashtar University of Technology AD - Department of Applied Chemistry, Malek-Ashtar University of Technology, Isfahan 83145-115, IRAN AD - Faculty of Chemistry and Chemical Engineering, Malek-Ashtar University of Technology, Tehran, Iran Y1 - 2018 PY - 2018 VL - 5 IS - 1 SP - 1 EP - 11 KW - Hydrogen evolution reaction (HER) KW - Ni-P-CeO2 KW - electrocatalytic activity KW - Electrochemical Impedance Spectroscopy (EIS) DO - 10.22104/ijhfc.2018.2758.1167 N2 - 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.    UR - https://hfe.irost.ir/article_663.html L1 - https://hfe.irost.ir/article_663_02ea45f7bccfa3e22d9dfd08443f6109.pdf ER -