Fabrication of dispersive α-Co(OH)2 nanosheets on graphene nanoribbons for boosting their oxygen evolution performance

  • Jingyun Wang
  • Yipeng Bao
  • Cao Cui
  • Zhenyu Zhang
  • Shumin Li
  • Jiami Pan
  • Yingying Zhang
  • Gaomei Tu
  • Jin Wang
  • Zhengquan LiEmail author


Nanostructured α-Co(OH)2 materials are promising noble-metal-free electrocatalysts for oxygen evolution reaction (OER), but their performance is severally restrained by their poor conductivity. Combination of α-Co(OH)2 and carbon nanotubes (CNTs) can improve their conductivity, but it is difficult to build sufficient interface contact between them due to the mismatched hydrophobicity. Herein, we demonstrate a facile method to in situ grow α-Co(OH)2 nanosheets (NSs) on graphene nanoribbons (GNRs), an intriguing belt-like conductive material after oxidative unzipping of CNTs. Owing to the rich of functional groups, the GNRs can be utilized as substrate in solution to prepare dispersive α-Co(OH)2 nanosheets on their surface. The developed α-Co(OH)2 NSs are well contact with the conductive GNRs substrate and offer sufficient active surface area, showing obviously better OER performance than the α-Co(OH)2 and CNTs/Co(OH)2 prepared under the same condition. The composite electrocatalysts have been characterized by various apparatuses, and their OER activities are explored in detail.



The authors acknowledge financial support from Natural Science Foundation of Zhejiang Province (Nos LR15B010001 and LGG19B010002) and National Natural Science Foundation of China (No 21701143). Mr. Y. Bao also thanks for the financial support from Undergraduate Training Program for Innovation and Entrepreneurship of China (No 201810345015).

Supplementary material

10853_2019_3421_MOESM1_ESM.doc (3.7 mb)
Supplementary material 1 (DOC 3835 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhuaPeople’s Republic of China

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