塔菲尔方程
过电位
非阻塞I/O
剥脱关节
析氧
化学
电催化剂
纳米片
化学工程
纳米复合材料
电化学
催化作用
纳米颗粒
电解质
无机化学
石墨烯
电极
物理化学
有机化学
工程类
作者
Fen Qiu,Jinghui Shi,Manman Guo,Shuai Chen,Jianhui Xia,Zhang‐Hui Lu
标识
DOI:10.1021/acs.inorgchem.0c03073
摘要
A novel nonprecious Fe2O3 nanoparticle decorated NiO nanosheet (Fe2O3 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 Fe2O3 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 Fe2O3 NPs@NiO NSs nanocomposite possessed a high BET surface area (194.1 m2 g–1), which is very conducive to the charge/mass transfer of electrolyte ions and O2. Owing to the unique two-dimensional (2D) heterostructures and rational Fe content, the as-prepared Fe2O3 NPs@NiO NSs show high catalytic performance, a low overpotential at 10 mA cm–2 (221 mV), a small Tafel slope (53.4 mV dec–1), and 2000 cycle and 20 h long-term durability. The introduction of Fe2O3 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.
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