| NiFe_2O_4/NiO纳米复合材料的制备及电催化水氧化性能 |
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| 引用本文： | 冯晓磊,曲宗凯,陈俊,王登登,陈旭,杨文胜.NiFe_2O_4/NiO纳米复合材料的制备及电催化水氧化性能[J].高等学校化学学报,2017,38(11). |
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| 作者姓名： | 冯晓磊 曲宗凯 陈俊 王登登 陈旭 杨文胜 |
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| 作者单位： | 北京化工大学,化工资源有效利用国家重点实验室,北京100029 |
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| 基金项目： | 国家自然科学基金(批准号:21521005;21656001)资助.Supported by the National Natural Science Foundation of China |
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| 摘 要： | 以镍铁水滑石为单一前驱体,通过高温焙烧制备了NiFe_2O_4/NiO纳米复合材料,对该纳米复合材料在碱性介质中电催化水的氧化性能进行了研究.结果表明,相比于化学共沉淀法制备的单独NiFe_2O_4、NiO及其物理混合物NiFe_2O_4+NiO,NiFe_2O_4/NiO纳米复合材料具有更高的电催化水氧化活性和更好的循环稳定性.电流密度为10 m A/cm2时过电位仅为364 m V.
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| 关 键 词： | 尖晶石型金属氧化物 氧析出反应 分解水 纳米复合材料 |
NiFe2O4/NiO Nanocomposites as Electrocatalysts for Oxygen Evolution Reaction |
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| FENG Xiaolei,QU Zongkai,CHEN Jun,WANG Dengdeng,CHEN Xu,YANG Wensheng.NiFe2O4/NiO Nanocomposites as Electrocatalysts for Oxygen Evolution Reaction[J].Chemical Research In Chinese Universities,2017,38(11). |
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| Authors: | FENG Xiaolei QU Zongkai CHEN Jun WANG Dengdeng CHEN Xu YANG Wensheng |
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| Abstract: | NiFe2O4/NiO nanocomposites were prepared by the thermal treatment of a single-source NiFe-layered double hydroxide precursor and were used as electrocatalysts for electrooxidation of water( oxygen evolution reaction, OER). The NiFe2O4/NiO nanocomposites exhibited much higher water oxidation activity and better stability than pure NiFe2O4 , NiO and a physical mixture of NiFe2O4 and NiO synthesized by chemi-cal coprecipitation method. A current density of 10 mA/cm2 was reached at an overpotential of 364 mV in al-kaline media. The good electrocatalytic performance for OER could presumably be attributed to that the well-dispersed heterogeneous structure of the nanocomposites prevented the aggregation of NiFe2O4 and resulted in a higher surface area and a smaller charge transfer resistance compared with the control samples. |
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| Keywords: | Spinel-type metal oxide Oxygen evolution reaction Water splitting Nanocomposites |
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