上海大学学报(自然科学版) ›› 2021, Vol. 27 ›› Issue (4): 706-716.doi: 10.12066/j.issn.1007-2861.2154

• 研究论文 • 上一篇    下一篇

金属有机骨架衍生的 NiFe2O4/Co9S8复合催化剂的合成及其电催化析氧性能

王尚岱, 黄守双, 胡张军, 陈志文()   

  1. 上海大学 环境与化学工程学院, 上海 200444
  • 收稿日期:2019-04-01 出版日期:2021-08-20 发布日期:2021-07-22
  • 通讯作者: 陈志文 E-mail:zwchen@shu.edu.cn
  • 作者简介:陈志文(1962—), 男, 教授, 博士生导师, 研究方向为纳米材料的合成与性质等. E-mail: zwchen@shu.edu.cn
  • 基金资助:
    国家自然科学青年基金资助项目(21601120);上海市自然科学基金资助项目(17ZR1410500)

Controlled synthesis of NiFe2O4/Co9S8 nanocomposites derived from metal-organic frameworks as efficient electrocatalysts for oxygen evolution reaction

WANG Shangdai, HUANG Shoushuang, HU Zhangjun, CHEN Zhiwen()   

  1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2019-04-01 Online:2021-08-20 Published:2021-07-22
  • Contact: CHEN Zhiwen E-mail:zwchen@shu.edu.cn

摘要:

以金属有机骨架(metal-organic frameworks, MOFs)化合物为前驱体, 通过退火、硫化等后续处理方法成功制备了由 NiFe2O4 纳米棒与 Co9S8 空心球组装而成的杂化纳米结构. 该复合催化剂因具有较大的比表面积以及各组分间强力的协同作用, 在电催化析氧反应(oxygen evolution reaction, OER)中表现出了优异的催化活性. 在 1 mol/L KOH 电解质中, 当电流密度达到 10 mA/cm2 时, 仅需 290 mV 的过电位, 且 Tafel 斜率仅为 63.02 mV/dec. 此外, 1 000 次循环伏安(cyclic voltammetry, CV)测试后仍然具有良好的催化活性, 表明该复合催化剂具有优异的稳定性. 研究成果不仅为设计廉价、高效且稳定的析氧催化剂提供了设计思路, 也为其他新型纳米复合材料的合成和应用奠定了基础.

关键词: 金属有机骨架, 纳米复合催化剂, 电解水, 析氧反应

Abstract:

This paper reported the controlled synthesis of NiFe2O4/Co9S8 nanocomposites via annealing and sulfuration of metal-organic frameworks (MOFs). Due to the porous structure and the strong synergetic effects between the different composites, the as-prepared NiFe2O4/Co9S8 nanocomposite catalysts afforded an electrocatalytic oxygen evolution reaction (OER) with a current density of 10 mA/cm2 at a low overpotential of 290 mV and a small Tafel slope of approximately 63.02 mV/dec in 1 mol/L KOH. Moreover, the NiFe2O4/Co9S8 nanocomposite catalysts showed outstanding stability without obvious decline after 1 000 cycles of sequential cyclic voltammetry (CV) scanning. The findings not only provide a promising strategy for designing efficient and stable OER catalysts but also can be extended to synthesize other novel nanocomposite materials.

Key words: metal-organic frameworks (MOFs), nanocomposite catalysts, water splitting, oxygen evolution reaction (OER)

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