Highly active electrocatalysis of hydrogen evolution reaction in alkaline medium by Ni-P alloy: A capacitance-activity relationship

• 来源期刊: 能源化学
• 年，卷（期）: 2017,（6）
• 页码范围: 1245-1251
• 页数: 7页
• 语种: 英文

摘要

Different weights of amorphous Ni-P alloy with same P contents were electrodeposited on nickel plate with same area used as cathode for hydrogen evolution reaction (HER).The amorphous Ni-P alloy coatings were characterized for their surface morphology and composition through Scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy (EDS) techniques,X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analysis.The electrocatalytic activity for HER in alkaline medium is determined by linear scan voltammetry (LSV) and a relationship between HER activity and capacitance is established.The capacitance varies with the loading of the Ni-P on Ni plate but the activity for HER is directly proportional to the capacitance in alkaline and vice versa.3#Ni-P/Ni containing 3.85 mg Ni-P alloy with highest capacitance performs the best catalytic activity.This work provides direct evidence to explore the capacitance influence on the electrocatalystic activity for the HER.