Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Inorganic Materials》 2018-06
Add to Favorite Get Latest Update

KOH Alkalized Fe_3N Nanoparticles on Electrocatalytic Hydrogen Evolution Reaction

WANG Hui;YU You-Xing;School of Material Science and Engineering, Beihang University;  
Surface modification of Fe_3N nanoparticles by KOH solution under electrification conditions was carried out, and effect of alkalization on the catalytic performance of Fe_3N nanoparticles was investigated. Morphology and composition of Fe_3N nanoparticles and alkalized Fe_3N nanoparticles were characterized by XRD, TEM, EDX, XPS, Raman spectra, and Fourier Transform Infrared spectroscopy. Electrocatalytic hydrogen evolution reaction(HER) performance of Fe_3N nanoparticles and alkalized Fe_3N nanoparticles was analyzed by time-current curve, linear sweep voltammetry, Tafel slope, AC impedance method, and CV curve. It was found that, for alkalized Fe_3N nanoparticles, their average grain sizes decreased from(80±10) nm to(70±10) nm. Their morphology changed from broken chain structure to elliptical structure, while their the phase changed partly from e-Fe_3N to α-Fe2 O3, which brought about more exposed electrocatalytic activity sites when compared with the Fe_3N before alkalization. Overpotential at 10 m A/cm2 the alkalized Fe_3N nanoparticles was reduced from 0.429 V to 0.204 V and Tafel slope was reduced from 103 m V/dec to 95 m V/dec. Low opening voltage, small Tafel slope, low over-potential, small AC impedance and larg chemically active surface area were achieved by the alkalized Fe_3N nanoparticles, demonstrating that alkalized Fe_3N is a promising excellent electrocatalyst for water splitting.
【Fund】: 国家自然科学基金(51201004)~~
【CateGory Index】: O643.36;TQ116.2
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved