高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (11): 1999.doi: 10.7503/cjcu20170426

• 物理化学 • 上一篇    下一篇

NiFe2O4/NiO纳米复合材料的制备及电催化水氧化性能

冯晓磊, 曲宗凯, 陈俊, 王登登, 陈旭(), 杨文胜   

  1. 北京化工大学, 化工资源有效利用国家重点实验室, 北京 100029
  • 收稿日期:2017-07-04 出版日期:2017-11-10 发布日期:2017-10-30
  • 作者简介:联系人简介: 陈 旭, 女, 博士, 教授, 主要从事功能纳米材料的合成及电催化和电分析化学应用研究. E-mail: chenxu@mail.buct.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21521005, 21656001)资助

NiFe2O4/NiO Nanocomposites as Electrocatalysts for Oxygen Evolution Reaction

FENG Xiaolei, QU Zongkai, CHEN Jun, WANG Dengdeng, CHEN Xu*(), YANG Wensheng   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2017-07-04 Online:2017-11-10 Published:2017-10-30
  • Contact: CHEN Xu E-mail:chenxu@mail.buct.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21521005, 21656001)

摘要:

以镍铁水滑石为单一前驱体, 通过高温焙烧制备了NiFe2O4/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NiFe2O4、 NiO及其物理混合物NiFe2O4+NiO, NiFe2O4/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 mA/cm2时过电位仅为364 mV.

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

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 chemical coprecipitation method. A current density of 10 mA/cm2 was reached at an overpotential of 364 mV in alkaline 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.

Key words: Spinel-type metal oxide, Oxygen evolution reaction, Water splitting, Nanocomposites

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