电化学2017，Vol.23Issue(2)：159-169,11.DOI:10.13208/j.electrochem.161247
用于电化学水氧化的铁、镍、钴金属及其二元金属纳米颗粒比较研究
Comparative Studies of Fe, Ni, Co and Their Bimetallic Nanoparticles for Electrochemical Water Oxidation
摘要
Abstract
The design of efficient,durable,and earth-abundant electrocatalysts via environmentally compatible strategies for the oxygen evolution reaction (OER) is a vital for energy conversion processes.Herein we report a facile approach for the fabrication of low-cost and earth abundant metal catalysts,including iron (Fe),nickel (Ni),cobalt (Co),CoNi,and CoFe nanoparticles (NPs) on titaninm (Ti) substrates through a one-step electrochemical deposition.Field-emission scanning electron microscopy(FE-SEM),energy dispersive X-ray spectroscopy (EDX),X-ray diffraction (XRD) spectrocopy,X-ray photoelectron spectroscopy (XPS),and electrochemical techniques were employed to characterize these nanoparticles.Our electrochemical results revealed that among the five synthesized nanomaterials,the Ti/Co electrode exhibited the highest electrocatalytic activity toward OER in 0.1 mol· L-1 KOH with a current density of 10.0 mA· cm-2 at 0.70 V vs.Ag/AgC1.The optimized Ti/Co electrode exhibited a small overpotential (η) of 0.43 V at 10.0 mA· cm-2 and a high mass activity of 105.7 A· g-1 with a tumover frequency (TOF) value of 1.63 × 10-3 s-1,which are comparable to the values obtained with the state-of-the-art Pt/C and RuO2 electrocatalysts.In addition,the durability of the optimized Ti/Co electrode was tested using a chronopotentiometric technique,which revealed that the developed electrocatalyst possessed good stability for OER in an alkaline solution.The high catalytic activity,high stability,earth abundance,cost-effectiveness,and easy scale-up for mass production make the Co nanoparticles,which were electrochemically deposited on a Ti substrate,promising for industrial water splitting.关键词
钴纳米颗粒/电化学沉积/电催化剂/氧气析出反应/能量转换Key words
cobalt nanoparticle/electrochemical deposition/electrocatalyst/oxygen evolution reaction/energy conversion分类
化学化工引用本文复制引用
Maduraiveeran Govindhan,Brennan Mao,陈爱成..用于电化学水氧化的铁、镍、钴金属及其二元金属纳米颗粒比较研究[J].电化学,2017,23(2):159-169,11.基金项目
This research was supported by the Discovery Grant from the Natural Sciences and Engineering Research Council of Canada (NSERC RGPIN-2015-06248). （NSERC RGPIN-2015-06248）
