石墨烯负载超薄二硫化钼杂化材料的电催化析氢性能
ElectrocatalyticHydrogen Evolution Performance of Ultra-Thin MoS2 Loaded Graphene Hybrids
作者单位E-mail
郭树旺 内蒙古科技大学材料与冶金学院, 分析测试中心, 包头 014010  
高占勇 内蒙古科技大学材料与冶金学院, 分析测试中心, 包头 014010  
宋金玲 内蒙古科技大学材料与冶金学院, 分析测试中心, 包头 014010  
布林朝克 内蒙古科技大学材料与冶金学院, 分析测试中心, 包头 014010  
张邦文 内蒙古科技大学材料与冶金学院, 分析测试中心, 包头 014010 bangwenz@126.com 
摘要: 以磷钼酸和L-半胱氨酸作为前驱体,还原氧化石墨烯作为载体,采用水热法一步合成了超薄二硫化钼/还原氧化石墨烯杂化材料(UT-MoS2/rGO)。作为电催化析氢(HER)非贵金属催化剂,对其结构特征和在0.5 mol·L-1 H2SO4溶液中氧化还原反应的催化性能进行表征。结果显示,得益于UT-MoS2暴露的丰富活性位点、导电rGO片的稳定支撑以及MoS2与rGO的良好结合,UT-MoS2/rGO显示了优异的电催化性能。其起始过电势为-66 mV;电流密度为-10 mA·cm-2时过电势为-145 mV,Tafel斜率为42.9 mV·dec-1;交流阻抗为0.76 Ω;在0.1~0.2 V范围内循环伏安测试1000次后,其催化活性仍能保持98%。
关键词: 水热合成  MoS2  石墨烯  电催化  析氢反应
基金项目: 国家自然科学基金(No.21407084)、内蒙古自治区科技创新引导基金重大项目(No.KCBJ2018032)和内蒙古科技大学创新基金(No.2018YQL01)资助
Abstract: An ultra-thin MoS2/reduced graphene oxide (UT-MoS2/rGO) catalyst was prepared by one-step hydrothermal method, in which H3PO4·12MoO3 and C3H7NO2S were used as precursors and rGO was used as the carbon source. The microstructure of the UT-MoS2/rGO catalyst and its catalytic performance for hydrogen evolution reaction (HER) were studied. The results showed that UT-MoS2/rGO hybrid exhibited excellent electrocatalytic properties due to rich active sites from UT-MoS2, robust support of electrically conducting rGO and good bonding between UT-MoS2 and rGO. The initial overpotential was -66 mV; the overpotential was -145 mV at a current density of -10 mA·cm-2 with the Tafel slope of 42.9 mV·dec-1; the AC impedance was 0.76 Ω; the catalytic activity maintained 98% after 1 000 cycles at 0.1 to 0.2 V.
Keywords: hydrothermal synthesis  MoS2  graphene  electrocatalysis  hydrogen evolution reaction
投稿时间:2019-01-27 修订日期:2019-04-18
摘要点击次数:  52
全文下载次数:  92
郭树旺,高占勇,宋金玲,布林朝克,张邦文.石墨烯负载超薄二硫化钼杂化材料的电催化析氢性能[J].无机化学学报,2019,35(7):1195-1202.
查看全文  查看/发表评论  下载PDF阅读器
Support information: