FeCoS/N掺杂多孔碳的制备及其电催化析氢和析氧性能研究  

Preparation of FeCoS/N Doped Porous Carbon and Its Electrocatalytic Hydrogen and Oxygen Evolution Performance

作　　者：吕建国 马滢滢[1] 潘洋 苏丽雯 LV Jianguo;MA Yingying;PAN Yang;SU Liwen(School of Physics and Materials Engineering,Hefei Normal University,Hefei 230601,China;Joint Key Laboratory for Photoelectric Detection Science and Technology of Education Department of Anhui Province,Hefei Normal University,Hefei 230601,China)

机构地区：[1]合肥师范学院物理与材料工程学院,安徽合肥230601 [2]合肥师范学院光电探测高校联合重点实验室,安徽合肥230601

出　　处：《合肥师范学院学报》2024年第3期1-6,共6页Journal of Hefei Normal University

基　　金：安徽省高校自然科学研究重大项目“过渡金属掺杂MoS_(2)/RGO的构筑、界面调控及其性能优化”(2023AH040160)。

摘　　要：以水热法合成的FeCo-MOF为前驱体获得FeCo/NC,以硫脲为硫源对FeCo/NC进行硫化处理合成FeCoS/NC。XRD测试结果显示,随着硫脲添加量的增加,来自于FeS和Co_(9)S_(8)衍射峰的强度明显增强,对应于FeCo合金和Fe_(1-x)S的衍射峰逐渐消失,而来自石墨烯的衍射峰则未见明显变化。电化学性能测试结果显示,FeCoS/NC-0.7具有较为优异的HER和OER性能,析氢反应过程中,在电流密度为10 mA cm^(-2)处的过电位为200 mV,Tafel斜率为152.1 mV dec^(-1);析氧反应过程中,在电流密度为10 mA cm^(-2)处的过电位268 mV,Tafel斜率为55.8 mV dec^(-1)。FeCoS/NC-0.7的电荷转移电阻(R_(ct))和电化学活性表面积分别为12.6Ω和399.25 cm^(-2)。FeCo/NC was obtained using FeCo-MOF synthesized by hydrothermal method as a precursor.FeCoS/NC was synthesized by sulfurization treatment of FeCo/NC with thiourea as the sulfur source.The XRD results show that with the increasing amount of thiourea,the intensity of diffraction peaks from FeS and Co_(9)S_(8) significantly increases,while the diffraction peaks corresponding to FeCo alloy and Fe1-xS gradually disappear,and no significant change is observed in the diffraction peaks from graphene.Electrochemical performance tests reveal that FeCoS/NC-0.7 exhibits excellent HER and OER performance,with an overpotential of 200 mV at a current density of 10 mA cm^(-2) during the hydrogen evolution reaction,and a Tafel slope of 152.1 mV dec^(-1);during the oxygen evolution reaction,the overpotential is 268 mV at the same current density,with a Tafel slope of 55.8 mV dec^(-1).The charge transfer resistance(Rct)and electrochemical active surface area of FeCoS/NC-0.7 are 12.6Ωand 399.25cm^(-2) respectively.

关 键 词：FeCoS/NC 电催化 析氢反应 析氧反应 

分 类 号：TB333[一般工业技术—材料科学与工程]