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Quadrafunctional electrocatalyst of nickel/nickel oxide embedded N-graphene for oxygen reduction, oxygen evolution, hydrogen evolution and hydrogen peroxide oxidation reactions

Abstract

A multifunctional nano-heterostructured electrocatalyst of transitional metal/metal oxide (nickel/nickel oxide) embedded on nitrogen-doped graphene is reported. The hybrid composite of N-doped graphene nanosheets with high atomic percentage of nitrogen (8.2 at%) and embedded with highly distributed nickel/nickel oxide nanoparticles inside the graphene layers is synthesized in one pot thermal annealing process. The resultant composite demonstrates excellent electrocatalytic activities utilizing the superior electrocatalytical properties of nickel/nickel oxide nanoparticles supported with nitrogen-doped graphene. The hybrid exhibits efficient oxygen reduction reaction (ORR) properties comparable with state of the art electrode Pt/C with four-electron transfer pathway and superior oxygen evolution reaction (OER) compare to the state of the art electrode for OER, Ru/C. Alternatively, this composite acts as an excellent electrode material for hydrogen evolution reaction (HER) both in the acidic and alkaline media. Nevertheless, this composite demonstrates hydrogen peroxide oxidation reaction (HPOR) in the presence of hydrogen peroxide, which is crucial for developing reversible fuel cell and fuel cell with liquid oxidant.

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Publication details

The article was received on 12 Feb 2018, accepted on 12 May 2018 and first published on 22 May 2018


Article type: Paper
DOI: 10.1039/C8SE00068A
Citation: Sustainable Energy Fuels, 2018, Accepted Manuscript
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    Quadrafunctional electrocatalyst of nickel/nickel oxide embedded N-graphene for oxygen reduction, oxygen evolution, hydrogen evolution and hydrogen peroxide oxidation reactions

    S. N. Faisal, E. Haque, N. Noorbehesht, H. Liu, M. Islam, L. Shabnam, A. K. Roy, E. S. Pourazadi, M. S. Islam, A. Harris and A. Minett, Sustainable Energy Fuels, 2018, Accepted Manuscript , DOI: 10.1039/C8SE00068A

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