316L不锈钢表面Co_2O_4/MoS_2纳米复合涂层的组织和析氢性能
|
摘要
为获得廉价高效的电解水催化材料,通过水热法在316L不锈钢上制备Co_2O_4/MoS_2纳米复合材料,采用扫描电镜(SEM)、X射线衍射仪(XRD)及透射电镜(TEM)对制备的试样进行测试,并采用极化曲线对其析氢效果进行了电化学表征。结果表明:MoS_2纳米材料在不锈钢表面分布均匀,具有花瓣状堆叠结构; Co_2O_4纳米材料呈垂直制备形态,表现出明显取向性排列趋势; Co_2O_4/316L纳米材料的XRD谱中除存在不锈钢对应的3个特征衍射峰之外,还形成了Co_2O_4对应的衍射峰,MoS_2(002)晶面的特征峰表现为往低角度偏移的情况; Co_2O_4/MoS_2纳米材料具有优异的析氢性能,且随着过电位增大电流密度明显上升,析氢反应速度更快; Co_2O_4与MoS_2之间可通过协同作用提高析氢性能。
MoS_2 and Co_2O_4 nanomaterials were prepared on the 316 L stainless steel substrate by hydrothermal method. The prepared samples were tested by SEM,XRD and TEM,and electrochemical characterization of the hydrogen evolution effect was studied by polarization curves.Results showed that MoS_2 nanomaterials formed a uniform distribution on the surface of stainless steel and had petal-shaped stacking structure.Co_2O_4 nanomaterials showed vertically prepared state and had obvious orientation. XRD characterization of Co_2O_4/316 L nanomaterial showed that various diffraction peaks corresponding to Co_2O_4 were found,except for the three characteristic diffraction peaks corresponding to stainless steel. Besides,Co_2O_4/MoS_2 nano-materials showed excellent hydrogen evolution performance,and with the increase of the overpotential,the current density also increased obviously,so as to obtain a faster hydrogen evolution reaction speed. Hydrogen evolution performance could be improved by synergistic action between Co_2O_4 and MoS_2.
MoS_2 and Co_2O_4 nanomaterials were prepared on the 316 L stainless steel substrate by hydrothermal method. The prepared samples were tested by SEM,XRD and TEM,and electrochemical characterization of the hydrogen evolution effect was studied by polarization curves.Results showed that MoS_2 nanomaterials formed a uniform distribution on the surface of stainless steel and had petal-shaped stacking structure.Co_2O_4 nanomaterials showed vertically prepared state and had obvious orientation. XRD characterization of Co_2O_4/316 L nanomaterial showed that various diffraction peaks corresponding to Co_2O_4 were found,except for the three characteristic diffraction peaks corresponding to stainless steel. Besides,Co_2O_4/MoS_2 nano-materials showed excellent hydrogen evolution performance,and with the increase of the overpotential,the current density also increased obviously,so as to obtain a faster hydrogen evolution reaction speed. Hydrogen evolution performance could be improved by synergistic action between Co_2O_4 and MoS_2.
引文
[1]MA Q Y,HU C Y,LIU K L,et al.Identifying the electrocatalytic sites of nickel disulfide in alkaline hydrogen evolution reaction[J].Nano Energy,2017,126(41):148-153.
[2]YANG Y Q,ZHANG K,LIN H L,et al.MoS2-Ni3S2heteronanorods as efficient and stable bifunctional electrocatalysts for overall water splitting[J].ACS Catal,2017,65(7):2 357-2 362.
[3]刘苏,周海波,宋庆英.共沉淀条件对K/Co-MoS2催化剂性能的影响及表征研究[J].天然气化工(C1化学与化工),2018,43(5):25-29.
[4]赵晓宇,张广安,王立平,等.MoS2/Pb-Ti多层薄膜的结构和摩擦学性能[J].表面技术,2018,47(10):97-106.
[5]WEN S Y,LIU Y,ZHU F F,et al.Hierarchical MoS2nanowires/Co2O4nanosheets supported on Ni foam for highperformance asymmetric supercapacitors[J].Appl Surf Sci,2018,428(16):616-621
[6]王新鹏,易戈文,贾均红,等.Ni Al-Ti O2/Bi2O3纳米复合涂层制备及宽温域摩擦磨损性能[J].摩擦学学报,2018,38(5):570-576.
[7]丁佳,罗来涛.沉淀剂对尖晶石型Co(0.7)Ce(0.3)Co2O4催化剂甲烷催化燃烧性能的影响[J].稀土,2009,30(3):36-40.
[8]BOSE R,JIN Z Y,SHIN S,et al.Co-catalytic effects of Co S2on theactivity of the MoS2catalyst for electrochemical hydrogen evolution[J].Langmuir,2017,212(33):5 628-5 633.
[9]LV J L,MENG Y,LIANG T X,et al.The effect of reduced graphene oxide on MoS2for the hydrogen evolution reaction in acidic solution[J].Chem Phys Lett,2017,678(78):212-218.
[2]YANG Y Q,ZHANG K,LIN H L,et al.MoS2-Ni3S2heteronanorods as efficient and stable bifunctional electrocatalysts for overall water splitting[J].ACS Catal,2017,65(7):2 357-2 362.
[3]刘苏,周海波,宋庆英.共沉淀条件对K/Co-MoS2催化剂性能的影响及表征研究[J].天然气化工(C1化学与化工),2018,43(5):25-29.
[4]赵晓宇,张广安,王立平,等.MoS2/Pb-Ti多层薄膜的结构和摩擦学性能[J].表面技术,2018,47(10):97-106.
[5]WEN S Y,LIU Y,ZHU F F,et al.Hierarchical MoS2nanowires/Co2O4nanosheets supported on Ni foam for highperformance asymmetric supercapacitors[J].Appl Surf Sci,2018,428(16):616-621
[6]王新鹏,易戈文,贾均红,等.Ni Al-Ti O2/Bi2O3纳米复合涂层制备及宽温域摩擦磨损性能[J].摩擦学学报,2018,38(5):570-576.
[7]丁佳,罗来涛.沉淀剂对尖晶石型Co(0.7)Ce(0.3)Co2O4催化剂甲烷催化燃烧性能的影响[J].稀土,2009,30(3):36-40.
[8]BOSE R,JIN Z Y,SHIN S,et al.Co-catalytic effects of Co S2on theactivity of the MoS2catalyst for electrochemical hydrogen evolution[J].Langmuir,2017,212(33):5 628-5 633.
[9]LV J L,MENG Y,LIANG T X,et al.The effect of reduced graphene oxide on MoS2for the hydrogen evolution reaction in acidic solution[J].Chem Phys Lett,2017,678(78):212-218.