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Electrospun Bimetallic NiCr [email protected] Nanofibers as an Efficient Catalyst for Hydrogen Generation from Ammonia Borane

1
Department of Civil and Environmental Engineering, Temple University, 1947 N. 12th Street, Philadelphia, PA 19122, USA
2
Department of Chemical Engineering, Faculty of Engineering, Jazan University, Jazan 45142, Saudi Arabia
3
Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
4
Department of Engineering Mathematics and Physics, Faculty of Engineering, Mansoura University, El-Mansoura 35516, Egypt
5
Department of Mathematics and Physics Engineering, Faculty of Engineering at Mataria, Helwan University, Cairo 11718, Egypt
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(8), 1082; https://doi.org/10.3390/nano9081082
Received: 24 June 2019 / Revised: 20 July 2019 / Accepted: 23 July 2019 / Published: 28 July 2019
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Abstract

In this study, we report on the fabrication and utilization of NiCr alloy nanoparticles (NPs)-decorated carbon nanofibers (CNFs) as efficient and competent non-precious catalysts for the hydrolytic dehydrogenation of ammonia borane (AB) at 25 ± 2 °C. The introduced NFs have been fabricated in one step using a high-temperature thermal decomposition of the prepared electrospun nanofiber mats (nickel acetate tetrahydrate, chromium acetate dimer, and polyvinyl alcohol) in an inert atmosphere. The chemical composition of the NFs with different proportions of Ni1−xCrx (x = 0.0, 0.1, 0.15, 0.2, 0.25, 0.3) was established via standard characterization techniques. These techniques proved the formation of disorder Cr2Ni3 alloy and carbon for all the formulations. The as-synthesized composite NFs exhibited a higher catalytic performance for AB dehydrogenation than that of Cr-free Ni–CNFs. Among all the formulations, the sample composed of 15% Cr shows the best catalytic performance, as more H2 was released in less time. Furthermore, it shows good stability, as it is recyclable with little decline in the catalytic activity after six cycles. It also demonstrates the activation energy, entropy (ΔS), and enthalpy (ΔH) with 37.6 kJ/mole, 0.094 kJ/mole, and 35.03 kJ/mole, respectively. Accordingly, the introduced catalyst has a lower price with higher performance encouraging a practical sustainable H2 energy application from the chemical hydrogen storage materials. View Full-Text
Keywords: nanofibers; hydrogen production; energy application; electrospinning nanofibers; hydrogen production; energy application; electrospinning
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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M. Brooks, R.; Maafa, I.M.; M. Al-Enizi, A.; M. El-Halwany, M.; Ubaidullah, M.; Yousef, A. Electrospun Bimetallic NiCr [email protected] Nanofibers as an Efficient Catalyst for Hydrogen Generation from Ammonia Borane. Nanomaterials 2019, 9, 1082.

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