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Volume 15
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Article

In Situ Ni-Doped Hierarchically Porous Carbon Nanofibers Derived from Polyacrylonitrile/Pitch for Hydrogen Storage at Ambient Temperature

by
Fuquan Song
1,2,*,
Lintao Huang
2,
Heying Ding
2,
Shiming Zhang
3 and
Jinbiao Yu
3
1
School of Petroleum and Natural Gas Engineering, Changzhou University, Changzhou 213164, China
2
School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan 316022, China
3
Exploration and Development Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257015, China
*
Author to whom correspondence should be addressed.
Sustainability 2023, 15(11), 8722; https://doi.org/10.3390/su15118722
Submission received: 24 April 2023 / Revised: 16 May 2023 / Accepted: 20 May 2023 / Published: 29 May 2023
(This article belongs to the Special Issue Advanced Energy Materials for Sustainability)
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Abstract

Porous carbon nanofibers doped with nickel (Ni) were successfully fabricated through electrospinning, carbonization, and CO2 activation techniques using polyacrylonitrile (PAN) and petroleum pitch as carbon sources and nickel acetate as the dopant. During the activation process, Ni was reduced and dispersed in situ on the carbon matrix. The effects of Ni doping content on the morphology and structure of the carbon nanofibers were systematically investigated using SEM, TEM, XPS, XRD, Raman, and BET analyses. The experimental results revealed that the prepared materials had a hierarchically porous structure and that Ni nanoparticles played multiple roles in the preparation process, including catalyzing pore expansion and catalytic graphitization. However, particle agglomeration and fiber fracture occurred when the Ni content was high. In the adsorption/desorption experiments, the sample with 10 wt% Ni doping exhibited the highest specific surface area and micropore volume of 750.7 m2/g and 0.258 cm3/g, respectively, and had the maximum hydrogen storage capacity of 1.39 wt% at 298 K and 10 MPa. The analyses suggested that the hydrogen adsorption mechanism contributed to enhanced H2 adsorption by the spillover effect in addition to physisorption.
Keywords: carbon nanofiber; petroleum pitch; electrospinning; hydrogen adsorption; spillover carbon nanofiber; petroleum pitch; electrospinning; hydrogen adsorption; spillover
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MDPI and ACS Style

Song, F.; Huang, L.; Ding, H.; Zhang, S.; Yu, J. In Situ Ni-Doped Hierarchically Porous Carbon Nanofibers Derived from Polyacrylonitrile/Pitch for Hydrogen Storage at Ambient Temperature. Sustainability 2023, 15, 8722. https://doi.org/10.3390/su15118722

AMA Style

Song F, Huang L, Ding H, Zhang S, Yu J. In Situ Ni-Doped Hierarchically Porous Carbon Nanofibers Derived from Polyacrylonitrile/Pitch for Hydrogen Storage at Ambient Temperature. Sustainability. 2023; 15(11):8722. https://doi.org/10.3390/su15118722

Chicago/Turabian Style

Song, Fuquan, Lintao Huang, Heying Ding, Shiming Zhang, and Jinbiao Yu. 2023. "In Situ Ni-Doped Hierarchically Porous Carbon Nanofibers Derived from Polyacrylonitrile/Pitch for Hydrogen Storage at Ambient Temperature" Sustainability 15, no. 11: 8722. https://doi.org/10.3390/su15118722

APA Style

Song, F., Huang, L., Ding, H., Zhang, S., & Yu, J. (2023). In Situ Ni-Doped Hierarchically Porous Carbon Nanofibers Derived from Polyacrylonitrile/Pitch for Hydrogen Storage at Ambient Temperature. Sustainability, 15(11), 8722. https://doi.org/10.3390/su15118722

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