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AuthorBarakat, Nasser A. M.
AuthorEl-Deen, Ahmed G.
AuthorGhouri, Zafar Khan
AuthorSaeed, Al-Meer
Available date2018-04-09T05:31:46Z
Publication Date2018-02-28
Publication NameScientific Reportsen_US
Identifierhttp://dx.doi.org/10.1038/s41598-018-22114-1
CitationBarakat, Nasser A. M., et al. “Stable N-Doped & FeNi-Decorated Graphene Non-Precious Electrocatalyst for Oxygen Reduction Reaction in Acid Medium.” Scientific Reports, vol. 8, no. 1, 2018, doi:10.1038/s41598-018-22114-1.
ISSN2045-2322
IdentifierArticle number: 3757
URIhttp://hdl.handle.net/10576/6532
AbstractNiFe nanoparticles-decorated & N-doped graphene is introduced as an effective and stable nonprecious electrocatalyst for ORR in the acid medium. Compared to conventional Pt/C electrodes under the same conditions, the proposed nanocatalyst shows closer onset potential and current density. Typically, the observed onset potentials and current densities for the synthesized and Pt/C electrodes are 825 and 910 mV (vs. NHE) and −3.65 and −4.31 mA.cm−2 (at 5 mV.s−1), respectively. However, the most important advantage of the introduced metallic alloy-decorated graphene is its distinct stability in acid medium; the retention in the electrocatalytic performance after 1,000 successive cycles is approximately 98%. This finding is attributed to the high corrosion resistance of the NiFe alloy. The kinetic study indicates that the number of the transferred electrons is 3.46 and 3.89 for the introduced and Pt/C (20 wt%) electrodes, respectively which concludes a high activity for the proposed nanocomposite. The suggested decorated graphene can be synthesized using a multithermal method. Typically, nickel acetate, iron acetate, graphene oxide and urea are subjected to MW heating. Then, sintering with melamine in an Argon atmosphere at 750 °C is required to produce the final electrocatalyst. Overall, the introduced NiFe@ N-doped Gr nanocomposite shows remarkable electrochemical activity in the acid medium with long-term stability.
SponsorThis Publication was made possible by NPRP grant # [8-1344-1-246] from the Qatar National Research Fund (a member of Qatar Foundation). The findings achieved herein are solely the responsibility of authors
Languageen
PublisherNature Publishing Group
SubjectNiMn Naoparticles
SubjectEnergy science and technology
SubjectMaterials science
SubjectNanoscience and technology
SubjectPhysical sciences
TitleStable N-doped & FeNidecorated graphene non-precious electrocatalyst for Oxygen Reduction Reaction in Acid Medium
TypeArticle
Issue Number1
Volume Number8
dc.identifier.essn 2045-2322


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