Nitrogen-doped reduced graphene oxide is successfully synthesized and functionalized with hydroxylated copper ions via one-pot microwave-assisted route. The presence of cationic Cu coordinated to the graphene layer is fully elucidated through a set of experimental characterizations and theoretical calculations. Thanks to the presence of these hydroxyl-coordinated Cu2+ active sites, the proposed material shows good electrocatalytic performance for the oxygen reduction reaction, as evidenced by an electron transfer number of almost 4 and by high onset and half-wave potentials of 0.91 V and 0.78 V vs. the reversible hydrogen electrode, respectively. In addition, the N-doped Cu-functionalized graphene displays a superior current retention with respect to a commercial Pt/C catalyst during the stability test, implying its potential implementation in high-performance fuel cells and metal-air batteries.
Facilely synthesized nitrogen-doped reduced graphene oxide functionalized with copper ions as electrocatalyst for oxygen reduction / Garino, Nadia; Zeng, Juqin; Castellino, Micaela; Sacco, Adriano; Risplendi, Francesca; Fiorentin, Michele Re; Bejtka, Katarzyna; Chiodoni, Angelica; Salomon, Damien; Segura-Ruiz, Jaime; Pirri, Candido F.; Cicero, Giancarlo. - In: NPJ 2D MATERIALS AND APPLICATIONS. - ISSN 2397-7132. - ELETTRONICO. - 5:2(2021). [10.1038/s41699-020-00185-x]
|Titolo:||Facilely synthesized nitrogen-doped reduced graphene oxide functionalized with copper ions as electrocatalyst for oxygen reduction|
|Data di pubblicazione:||2021|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1038/s41699-020-00185-x|
|Appare nelle tipologie:||1.1 Articolo in rivista|