(1. 陕西理工大学 材料科学与工程学院，汉中 723000；
2. 陕西理工大学 矿渣综合利用环保技术国家地方联合工程实验室，汉中 723000)
摘 要: 通过简单一步水热法在泡沫镍表面原位生长多孔纳米片自组装成纳米花结构的FeS@Ni3S2/NF催化电极。借助 X 射线衍射仪(XRD)、X 射线光电子能谱(XPS)、透射电镜(TEM)等进行物相及结构表征，并测试催化电极在1 mol/L KOH 溶液中的电催化析氧(OER)性能。电化学测试结果表明：FeS@Ni3S2/NF-1.2电极在100 mA·cm-2电流密度下仅需278 mV的过电位，且具有较低的Tafel斜率(22.71 mV/dec)，与纯NF(493 mV，214.65 mV/dec)、纯Ni3S2(327 mV，91.87 mV/dec)以及IrO2/NF(385 mV，172.93 mV/dec)相比，其优势明显。证明具有独特多孔结构的FeS@Ni3S2/NF纳米片自组装成的纳米花可以作为一种贵金属基电催化剂的理想替代品。
关键字: Fe掺杂；自组装纳米花；电催化剂；析氧反应
（1. School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China;
2. National and Local Joint Engineering Laboratory for Environmental Protection Technology for Comprehensive Utilization of Slag, Shaanxi University of Technology, Hanzhong 723000, China）
Abstract:FeS@Ni3S2/NF nanoflower assembled by porous nanosheet was in-situ grown on the surface of nickel foam (NF) by a simple one-step hydrothermal method. The phase composition and microstructure of the samples were characterized by XRD, XPS and TEM. The electrocatalytic oxygen evolution (OER) performance of the samples was also measured in 1 mol/L KOH solution. The electrochemical test results show that FeS@Ni3S2/NF-1.2 electrode exhibits an overpotential of 278 mV at the current density of 100 mA/cm2 with lower Tafel slope (22.71 mV/dec). Moreover, the catalytic activity is superior than that of pure NF (493 mV, 214.65 mV/dec), Ni3S2 (327 mV, 91.87 mV/dec) and IrO2/NF (385 mV, 172.93 mV/dec). The results prove that FeS@Ni3S2/NF nanoflower assembled by nanosheet with special porous structure can be used as a potential candidator to replace the precious metals electrocatalyst.
Key words: Fe-doping; self-assembling nano-flowers; electrocatalyst; oxygen evolution reaction
