RETRACTED ARTICLE: MOF-derived highly active Ni/Co/NC electrocatalyst and its application for hydrogen evolution reaction

This article was retracted on 18 June 2020

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The development of electrocatalysts with excellent activity for clean and sustainable H2 has been considered as an efficient way to store energy and meet the increasing energy and environmental demands. In this paper, we used zeolitic imidazolate frameworks-67 (ZIF-67) as precursors to synthesize the highly active N-doped graphene loaded with Ni and Co nanoparticles (Ni/Co/NC) for hydrogen evolution reaction (HER). The physical and electrochemical characterization of all synthesized samples were analyzed by X-ray diffraction, Raman spectra, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and HER. The results show that the organic ligands of ZIF-67 were successfully transformed into N-doped graphene after high temperature treatment. Ni element was well dispersed in the supporting graphene and can make the graphene keeping the dodecahedral morphology with hollow structure. Co nanoparticles were encapsulated by a layer of graphene. Electrochemical tests show that Ni/Co/NC800 exhibits excellent performance for hydrogen generation: the onset overpotential is only 125 mV, the Tafel slope is 57.6 mV/dec. The excellent performance of Ni/Co/NC800 makes its being a promising candidate for energy storage and conversion applications.

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Change history

  • 18 June 2020

    The Editor-in-Chief has retracted this article [1]. Concerns were raised with Figures 2b and 7a. Subsequent postpublication review concluded that the results of the article are unreliable. Additionally, Figure 7b was reproduced from [2] without permission. All authors agree with the retraction.


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The authors wish to acknowledge the financial supports from the Fujian Key Laboratory of Advanced Materials, Educational Research Projects for Young and Middle-aged Teachers in Fujian Province (Grant No. JT180549), Natural Science Foundation of Fujian Province (Grant No. 2019J01020797), The Project of Fujian Provincial Key Laboratory of Eco-Inductrial Green Technology (Grant No. WYKF2018-8), Program for Outstanding Young Scientific Research Talents in Fujian Province University (MinKeJiao, 2018, No 47).

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Yang, X., Lin, H., Hua, W. et al. RETRACTED ARTICLE: MOF-derived highly active Ni/Co/NC electrocatalyst and its application for hydrogen evolution reaction. J Porous Mater 26, 1713–1720 (2019).

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  • ZIF-67
  • Ni/Co/NC
  • Hollow structure
  • Hydrogen evolution reaction