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Remarkably Improved Electrochemical Hydrogen Storage of Multi-walled Carbon Nanotubes Decorated with Nanoporous Bimetallic Fe-Ag/TiO2 Nanoparticles

Abstract

Nanoporous bimetallic Fe-Ag nanoparticles (NPs) were synthesized using a facile chemical reduction method and used to decorate the surface of multi-walled carbon nanotubes (MWCNTs) for hydrogen sorption and storage. The effect of TiO2 nanoparticles on the Fe-Ag/CNTs hydrogen storage properties were further studied in details. For this purpose, several nanocomposites of nanoporous bimetallic Fe-Ag/TiO2 nanoparticles with different amounts of bimetallic Fe-Ag NPs were prepared via hydrothermal method. The hydrogen storage capacity of the as-prepared nanocomposites were studied using electrochemical methods. The Fe-Ag/TiO2/CNT nanocomposite with the 0.04 M of bimetallic Fe-Ag NPs showed the highest capacity for hydrogen storage which was ~5X higher than the pristine MWCNTs. The maximum discharge capacity was 2931 mAh g-1 corresponding to 10.94 wt% hydrogen storage capacity. Furthermore, a 379% increase in discharge capacity was measured after 20 cycles. These results show that Fe-Ag/TiO2/CNT electrode displays superior cycle stability and high reversible capacity, which is attractive for battery applications.

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Publication details

The article was received on 27 Sep 2018, accepted on 03 Dec 2018 and first published on 04 Dec 2018


Article type: Paper
DOI: 10.1039/C8DT03897J
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Remarkably Improved Electrochemical Hydrogen Storage of Multi-walled Carbon Nanotubes Decorated with Nanoporous Bimetallic Fe-Ag/TiO2 Nanoparticles

    R. akbarzadeh, M. Ghaedi, S. Nasiri Kokhdan and D. Vashaee, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT03897J

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