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Short-route synthesis method of N-doped exfoliated graphite whit catalytic activity for the oxygen reduction reaction.

Published online by Cambridge University Press:  19 October 2020

Daniel Lardizábal-G. Open the ORCID record for Daniel Lardizábal-G. [Opens in a new window] ,
I.L. Alonso-Lemus ,
L. de la Torre Saenz ,
A. Aguilar-Elguezabal  and
Ysmael Verde-Gómez
Daniel Lardizábal-G.*
Affiliation:
Centro de Investigación en Materiales Avanzados (CIMAV S.C.), Av. Miguel de Cervantes 120. Complejo Industrial Chihuahua. Chihuahua, Chihuahua, México. C.P. 31109 Instituto Tecnológico de Cancún, Av. Kabah Km. 3, Cancún, Quintana Roo, MéxicoC.P. 75000, [email protected], +52 998 8807432 Ext. 1002
I.L. Alonso-Lemus
Affiliation:
CONACyT-Cinvestav. Centro de Investigación y Estudios Avanzados del IPN. Grupo de Sustentabilidad de los Recursos Naturales y Energía. Av. Industria Metalúrgica 1602. Parque Industrial Saltillo-Ramos Arizpe. Coahuila, México. C.P.25900.
L. de la Torre Saenz
Affiliation:
Centro de Investigación en Materiales Avanzados (CIMAV S.C.), Av. Miguel de Cervantes 120. Complejo Industrial Chihuahua. Chihuahua, Chihuahua, México. C.P. 31109
A. Aguilar-Elguezabal
Affiliation:
Centro de Investigación en Materiales Avanzados (CIMAV S.C.), Av. Miguel de Cervantes 120. Complejo Industrial Chihuahua. Chihuahua, Chihuahua, México. C.P. 31109
Ysmael Verde-Gómez
Affiliation:
Instituto Tecnológico de Cancún, Av. Kabah Km. 3, Cancún, Quintana Roo, MéxicoC.P. 75000, [email protected], +52 998 8807432 Ext. 1002
*
Email: [email protected]
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Abstract

We report the synthesis of metal-free nitrogen-doped electrocatalysts obtained from graphite and urea as carbon and nitrogen precursor, respectively. High-energy milling and thermal annealing were carried out to obtain low cost electrocatalysts. Additionally, this method has shorter synthesis times, is environmentally friendly and use high-availability raw materials. A short-route synthesis consisted in the partial exfoliation of graphite by mechanical milling with urea. Afterwards, nitrogen was integrated into the exfoliated graphite lattice by thermal annealing at 500°C. XPS analyses shows up to 1.7 at. % was incorporated to the graphitic lattice. Scanning Electron Microscopy, X-ray diffraction and Raman Spectroscopy were used to analyse the morphology and structural features. The catalytic activity for the oxygen reduction reaction in basic media was evaluated by the rotating disk electrode technique.

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Articles
Information
MRS Advances , Volume 5 , Issue 57-58: International Materials Research Congress XXIX , 2020 , pp. 2939 - 2946
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Copyright
Copyright © The Author(s), 2020, published on behalf of Materials Research Society by Cambridge University Press

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