Chinese Journal of Catalysis ›› 2024, Vol. 62: 287-295.DOI: 10.1016/S1872-2067(24)60057-4
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Wancheng Zhaoa,1, Jiapeng Maa,1, Dong Tiana,*(), Baotao Kanga, Fangquan Xiaa, Jing Chenga, Yajun Wua, Mengyao Wanga, Gang Wub,*(
)
Received:
2024-04-15
Accepted:
2024-05-21
Online:
2024-07-18
Published:
2024-07-10
Contact:
E-mail: About author:
1 Contributed equally to this work.
Wancheng Zhao, Jiapeng Ma, Dong Tian, Baotao Kang, Fangquan Xia, Jing Cheng, Yajun Wu, Mengyao Wang, Gang Wu. Self-supported film catalyst integrated with multifunctional carbon nanotubes and Ni-Ni(OH)2 heterostructure for promoted hydrogen evolution[J]. Chinese Journal of Catalysis, 2024, 62: 287-295.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(24)60057-4
Fig. 1. Schematic representation of synthesis process of the designed 3D CNTs-Ni-Ni(OH)2 film as well as the corresponding characterizations of solution and films in each step. (a) Illustration of the synthesis process. (b) Image of the electrodeposition solution. (c) SEM images of prepared films corresponding to different stages.
Fig. 3. Performance comparison of the synthesized 3D CNTs-Ni-Ni(OH)2 catalyst with commercial Pt/C in 1.0 mol/L NaOH. (a) Linear sweep voltammograms. (b) Chronopotentiometric curves.
Fig. 4. Influence of CNTs on catalytic activity and morphology of synthesized CNTs-Ni. (a) Linear sweep voltammograms in 1.0 mol/L NaOH for CNTs-Ni films with different deposition time. (b?g) Influence of deposition time on morphology of 3D CNTs-Ni films. (b,c) 15 min; (d,e) 30 min; (f,g) 60 min. Scale bars in (b), (d) and (f), 1 μm. Scale bars in (c), (e) and (g), 200 nm.
Fig. 5. Linear sweep voltammograms (a) and ECSA-normalized linear sweep voltammograms (b) in 1.0 mol/L NaOH for CNTs-Ni films before and after oxidation treatment.
Fig. 6. Theoretical calculations. (a) Crystal structures of CNT-Ni and CNT-Ni(OH)2-Ni. (b) The calculated adsorption free energies of H on pure Ni, CNT-Ni, and CNT-Ni(OH)2-Ni. (c) Calculated d band center of Ni by the partial DOS of pure Ni, CNT-Ni and CNT-Ni(OH)2-Ni.
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