Electroanalytical Performance of Nitrogen-Doped Graphene Films Processed in One Step by Pulsed Laser Deposition Directly Coupled with Thermal Annealing

Materials

Carole Farre¹  Ilhem Rassas¹  Carole Chaix¹  Gaëtan Raimondi¹  Maryam Shokouhi¹  Nicole Jaffrezic-Renault¹  Maria-Carmen Asensio²  Yannick Bleu³  Christophe Donnet³  Anne-Sophie Loir³  Florent Bourquard³  Florence Garrelie³  Vincent Barnier⁴  José Avila⁵  Borja Caja-Munoz⁵ 

[1] Institut des Sciences Analytiques, UMR 5280 CNRS, Université de Lyon, Université Claude Bernard Lyon 1, F-69100 Villeurbanne, France;Instituto de Ciencia de Materiales de Madrid, Sor Juana Inés de la Cruz, 328049 Madrid, Spain;Laboratoire Hubert Curien, UMR 5516 CNRS, Université de Lyon, Université Jean Monnet, F-42000 Saint-Étienne, France;Mines Saint-Etienne, Université de Lyon, UMR 5307 CNRS, Centre SMS, F-42023 Saint-Etienne, France;Synchrotron SOLEIL, Université Paris-Saclay, Saint Aubin, F-91192 Gif sur Yvette, France;

关键词: graphene;    nitrogen-doped graphene;    pulse laser deposition;    electrochemical analysis;    oxygen peroxide oxidation;   

DOI  :  10.3390/ma12040666

来源: DOAJ

【 摘 要 】

Graphene-based materials are widely studied to enable significant improvements in electroanalytical devices requiring new generations of robust, sensitive and low-cost electrodes. In this paper, we present a direct one-step route to synthetize a functional nitrogen-doped graphene film onto a Ni-covered silicon electrode substrate heated at high temperature, by pulsed laser deposition of carbon in the presence of a surrounding nitrogen atmosphere, with no post-deposition transfer of the film. With the ferrocene methanol system, the functionalized electrode exhibits excellent reversibility, close to the theoretical value of 59 mV, and very high sensitivity to hydrogen peroxide oxidation. Our electroanalytical results were correlated with the composition and nanoarchitecture of the N-doped graphene film containing 1.75 at % of nitrogen and identified as a few-layer defected and textured graphene film containing a balanced mixture of graphitic-N and pyrrolic-N chemical functions. The absence of nitrogen dopant in the graphene film considerably degraded some electroanalytical performances. Heat treatment extended beyond the high temperature graphene synthesis did not significantly improve any of the performances. This work contributes to a better understanding of the electrochemical mechanisms of doped graphene-based electrodes obtained by a direct and controlled synthesis process.

【 授权许可】

Unknown