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Pàgina inicial > Articles > Articles publicats > Facile preparation of glycine-based mesoporous graphitic carbons with embedded cobalt nanoparticles |
Data: | 2022 |
Resum: | A simple route has been developed for the preparation of mesoporous graphitic carbons with embedded cobalt nanoparticles just using glycine as a nitrogen source, cobalt nitrate and distilled water. After heating the mixture to 300 °C under magnetic stirring, a dry solid product was obtained, which was then carbonized at 900 ºC under argon atmosphere. Changing the glycine/Co molar ratio allowed controlling the size of the cobalt particles and their dispersion in the carbon matrix, the porosity of the carbon and its graphitic character. The carbon-metal composites obtained were tested as oxygen cathodes in Li-O batteries. Cells assembled exhibited a full discharge capacity up to 2. 19 mAh cm at a current of 0. 05 mA cm and over 39 cycles at a cutoff capacity of 0. 5 mAh cm. This work provides a green, feasible and simple way to prepare mesoporous graphitic carbons with embedded cobalt nanoparticles without involving templates. |
Ajuts: | Agencia Estatal de Investigación CEX2019-000917-S Agencia Estatal de Investigación RTI2018-096273-B-I00 Agencia Estatal de Investigación RTI2018-3097753-B-I00 Ministerio de Economía y Competitividad MAT2017-91404-EXP Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1687 |
Nota: | This research was supported by the Spanish Ministry of Science and Innovation, through the "Severo Ochoa" Programme for Centers of Excellence in R&D (CEX2019-000917-S), the projects MAT2017-91404-EXP, RTI2018-096273-B-I00, RTI2018-3097753-B-I00, with FEDER co-funding, the CSIC program for the Spanish Recovery, Transformation and Resilience Plan "Plataforma Temática Interdisciplinar Transición Energética Sostenible+ (PTI-TRANSENER +)" funded by the Recovery and Resilience Facility of the European Union, established by the Regulation (EU) 2020/2094. The authors also acknowledge the Generalitat de Catalunya (2017SGR1687). W.W. gratefully acknowledges the support from the China Scholarship Council (CSC No.:201808340076). This work has been performed within the framework of the doctoral program in materials science of UAB (W. W.). |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Cobalt nanoparticles ; Distilled water ; Dry solids ; Facile preparation ; Graphitic carbons ; Magnetic stirring ; Mesoporous ; Nitrogen sources ; Simple++ ; Solid products |
Publicat a: | Journal of Materials Science, Vol. 57, issue 28 (July 2022) , p. 13403-13413, ISSN 1573-4803 |
11 p, 1.6 MB |