Graphene Materials from Coke-like Wastes as Proactive Support of Nickel–Iron Electro-Catalysts for Water Splitting
Graphene materials, used as electrocatalyst support in green hydrogen production, contribute to increasing the efficiency and robustness of various systems. However, the preparation of a hybrid catalyst containing graphene materials from industrial wastes is still a challenge due to the heterogeneit...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/29/6/1391 |
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| author | María González-Ingelmo Victoria G. Rocha Zoraida González Uriel Sierra Enrique Diaz Barriga Patricia Álvarez |
| author_facet | María González-Ingelmo Victoria G. Rocha Zoraida González Uriel Sierra Enrique Diaz Barriga Patricia Álvarez |
| author_sort | María González-Ingelmo |
| collection | DOAJ |
| description | Graphene materials, used as electrocatalyst support in green hydrogen production, contribute to increasing the efficiency and robustness of various systems. However, the preparation of a hybrid catalyst containing graphene materials from industrial wastes is still a challenge due to the heterogeneity of the waste. We report the synthesis of 3D electrodes using graphene oxides (GOs) from industrial waste (IW) prepared by immersion onto Toray carbon paper as a 3D support onto GO suspensions and electrodepositing NiFe layered double hydroxides (LDHs). Standard graphite was also used as the reference. The morphology of the two hybrid electrodes was determined by SEM, HRTEM, XPS. Although very similar in both, the sample containing graphene from IW (higher Csp<sup>3</sup> hybridization in the graphene layer) has a NiFe phase with less crystallinity and larger presence of Fe<sup>2+</sup> ions. These electrodes exhibited similar activity and stability as electrocatalysts of the oxygen evolution reaction (OER), demonstrating the proactive effect of the graphene into the 3D electrode even when this is prepared from heterogeneous industrial waste. Moreover, the defective graphenic structure of the waste GO enhances the reaction kinetics and improves the electron transfer rate, possibly due to the small differences in the electrodeposited NiFe LDH structure. |
| first_indexed | 2024-04-24T17:57:55Z |
| format | Article |
| id | doaj.art-122b393737d4448099c673d8e211a55c |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-04-24T17:57:55Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-122b393737d4448099c673d8e211a55c2024-03-27T13:57:15ZengMDPI AGMolecules1420-30492024-03-01296139110.3390/molecules29061391Graphene Materials from Coke-like Wastes as Proactive Support of Nickel–Iron Electro-Catalysts for Water SplittingMaría González-Ingelmo0Victoria G. Rocha1Zoraida González2Uriel Sierra3Enrique Diaz Barriga4Patricia Álvarez5Instituto de Ciencia y Tecnología del Carbono (INCAR), Consejo Superior de Investigaciones Científicas CSIC, Francisco Pintado, Fe 26, 33011 Oviedo, SpainInstituto de Ciencia y Tecnología del Carbono (INCAR), Consejo Superior de Investigaciones Científicas CSIC, Francisco Pintado, Fe 26, 33011 Oviedo, SpainInstituto de Ciencia y Tecnología del Carbono (INCAR), Consejo Superior de Investigaciones Científicas CSIC, Francisco Pintado, Fe 26, 33011 Oviedo, SpainLaboratorio Nacional de Materiales Grafénicos, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo, 140, Saltillo 25294, MexicoLaboratorio Nacional de Materiales Grafénicos, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo, 140, Saltillo 25294, MexicoInstituto de Ciencia y Tecnología del Carbono (INCAR), Consejo Superior de Investigaciones Científicas CSIC, Francisco Pintado, Fe 26, 33011 Oviedo, SpainGraphene materials, used as electrocatalyst support in green hydrogen production, contribute to increasing the efficiency and robustness of various systems. However, the preparation of a hybrid catalyst containing graphene materials from industrial wastes is still a challenge due to the heterogeneity of the waste. We report the synthesis of 3D electrodes using graphene oxides (GOs) from industrial waste (IW) prepared by immersion onto Toray carbon paper as a 3D support onto GO suspensions and electrodepositing NiFe layered double hydroxides (LDHs). Standard graphite was also used as the reference. The morphology of the two hybrid electrodes was determined by SEM, HRTEM, XPS. Although very similar in both, the sample containing graphene from IW (higher Csp<sup>3</sup> hybridization in the graphene layer) has a NiFe phase with less crystallinity and larger presence of Fe<sup>2+</sup> ions. These electrodes exhibited similar activity and stability as electrocatalysts of the oxygen evolution reaction (OER), demonstrating the proactive effect of the graphene into the 3D electrode even when this is prepared from heterogeneous industrial waste. Moreover, the defective graphenic structure of the waste GO enhances the reaction kinetics and improves the electron transfer rate, possibly due to the small differences in the electrodeposited NiFe LDH structure.https://www.mdpi.com/1420-3049/29/6/1391wastegraphene3D electrodeelectrocatalysisNiFewater splitting |
| spellingShingle | María González-Ingelmo Victoria G. Rocha Zoraida González Uriel Sierra Enrique Diaz Barriga Patricia Álvarez Graphene Materials from Coke-like Wastes as Proactive Support of Nickel–Iron Electro-Catalysts for Water Splitting Molecules waste graphene 3D electrode electrocatalysis NiFe water splitting |
| title | Graphene Materials from Coke-like Wastes as Proactive Support of Nickel–Iron Electro-Catalysts for Water Splitting |
| title_full | Graphene Materials from Coke-like Wastes as Proactive Support of Nickel–Iron Electro-Catalysts for Water Splitting |
| title_fullStr | Graphene Materials from Coke-like Wastes as Proactive Support of Nickel–Iron Electro-Catalysts for Water Splitting |
| title_full_unstemmed | Graphene Materials from Coke-like Wastes as Proactive Support of Nickel–Iron Electro-Catalysts for Water Splitting |
| title_short | Graphene Materials from Coke-like Wastes as Proactive Support of Nickel–Iron Electro-Catalysts for Water Splitting |
| title_sort | graphene materials from coke like wastes as proactive support of nickel iron electro catalysts for water splitting |
| topic | waste graphene 3D electrode electrocatalysis NiFe water splitting |
| url | https://www.mdpi.com/1420-3049/29/6/1391 |
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