Effect of Nitrogen-Functional Groups on the ORR Activity of Activated Carbon Fiber-Polypyrrole-Based Electrodes

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Title: Effect of Nitrogen-Functional Groups on the ORR Activity of Activated Carbon Fiber-Polypyrrole-Based Electrodes
Authors: Ramírez-Pérez, Ana Cristina | Quílez-Bermejo, Javier | Sieben, Juan Manuel | Morallon, Emilia | Cazorla-Amorós, Diego
Research Group/s: Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Activated carbon fiber | Polypyrrole | Thermal treatment | Oxygen reduction reaction | Electrocatalysts
Knowledge Area: Química Física | Química Inorgánica
Issue Date: Nov-2018
Publisher: Springer US
Citation: Electrocatalysis. 2018, 9(6): 697-705. doi:10.1007/s12678-018-0478-y
Abstract: Polypyrrole (PPy) coatings inside the microporosity of an activated carbon fiber (ACF) were synthesized by chemical polymerization obtaining ACF-PPy composites. N-doped ACFs were prepared by carbonization of the ACF-PPy composites at two temperatures (500 and 800 °C). All the samples were characterized using different techniques (XPS, SEM, elemental analysis, physical adsorption of N2, cyclic voltammetry, etc.). The electrochemical characterization in alkaline medium shows that the N-doped ACFs have a similar specific capacitance than the pristine ACF, in spite of the lower specific surface area. The materials were used as electrodes in the oxygen reduction reaction (ORR) in alkaline medium using the rotating ring-disk electrode (RRDE) and linear sweep voltammetry (LSV) tests. It was found that the N-doped ACF material carbonized at 800 °C has higher catalytic activity than the pristine ACF. The investigation also indicates that the ORR process on the N-doped ACF materials proceeds through an indirect two-electron pathway.
Sponsor: The authors thank MINECO, GV, and FEDER for financial support (projects MAT2016-76595-R, CTQ2015-66080-R (MINECO/FEDER)). ACRP thanks GV for a Santiago Grisolía fellowship (GRISOLIA/2012/009).
URI: http://hdl.handle.net/10045/82050
ISSN: 1868-2529 (Print) | 1868-5994 (Online)
DOI: 10.1007/s12678-018-0478-y
Language: eng
Type: info:eu-repo/semantics/article
Rights: © Springer Science+Business Media, LLC, part of Springer Nature 2018
Peer Review: si
Publisher version: https://doi.org/10.1007/s12678-018-0478-y
Appears in Collections:INV - GEPE - Artículos de Revistas
INV - MCMA - Artículos de Revistas

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