Qiu Fen, Shi Jinghui, Guo Manman, Chen Shuai, Xia Jianhui, Lu Zhang-Hui
Institute of Advanced Materials (IAM), College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, People's Republic of China.
Jiangxi Key Laboratory of Nanomaterials and Sensors, School of Physics, Communication and Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, People's Republic of China.
Inorg Chem. 2021 Jan 18;60(2):959-966. doi: 10.1021/acs.inorgchem.0c03073. Epub 2020 Dec 28.
A novel nonprecious FeO nanoparticle decorated NiO nanosheet (FeO NPs@NiO NSs) composite has been obtained by a rapid one-pot electrochemical exfoliation method and can be used as an efficient oxygen evolution reaction (OER) catalyst. In the nanocomposite, the FeO NPs are uniformly anchored on the ultrathin graphene-like NiO nanosheets. At the same time, we also studied the influence of the Fe/Ni molar ratio on the morphology and catalytic activity. The FeO NPs@NiO NSs nanocomposite possessed a high BET surface area (194.1 m g), which is very conducive to the charge/mass transfer of electrolyte ions and O. Owing to the unique two-dimensional (2D) heterostructures and rational Fe content, the as-prepared FeO NPs@NiO NSs show high catalytic performance, a low overpotential at 10 mA cm (221 mV), a small Tafel slope (53.4 mV dec), and 2000 cycle and 20 h long-term durability. The introduction of FeO NPs is beneficial to accelerating charge transport, increasing the electrochemically active surface area (ECSA), and thus improving the release of oxygen bubbles from the electrode surface.
通过快速一锅法电化学剥离法制备了一种新型非贵金属FeO纳米颗粒修饰的NiO纳米片（FeO NPs@NiO NSs）复合材料，该复合材料可作为高效析氧反应（OER）催化剂。在该纳米复合材料中，FeO纳米颗粒均匀地锚定在超薄的类石墨烯NiO纳米片上。同时，我们还研究了Fe/Ni摩尔比对其形貌和催化活性的影响。FeO NPs@NiO NSs纳米复合材料具有较高的BET比表面积（194.1 m²/g），这非常有利于电解质离子和O的电荷/质量传递。由于独特的二维（2D）异质结构和合理的Fe含量，所制备的FeO NPs@NiO NSs表现出高催化性能、在10 mA/cm²时的低过电位（221 mV）、小的塔菲尔斜率（53.4 mV/dec）以及2000次循环和20小时的长期耐久性。FeO纳米颗粒的引入有利于加速电荷传输、增加电化学活性表面积（ECSA），从而改善氧气泡从电极表面的释放。
