Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions
Bifunctional electrocatalysts to enable efficient oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential for fabricating high performance metal–air batteries and fuel cells. Here, a defect rich nitrogen and sulfur co-doped graphene/iron carbide (NS-GR/Fe3C) nanocomposite a...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier Ltd
2020
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| Online Access: | http://umpir.ump.edu.my/id/eprint/28379/ http://umpir.ump.edu.my/id/eprint/28379/1/Direct%20pyrolysis%20and%20ultrasound%20assisted%20preparation.pdf |
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| author | Rani, Karuppasamy Kohila Karuppiah, Chelladurai Wang, Sea-Fue Alaswad, Saleh O. Sireesha, Pedaballi Devasenathipathy, Rajkumar Rajan, Jose Yang, Chun-Chen |
| author_facet | Rani, Karuppasamy Kohila Karuppiah, Chelladurai Wang, Sea-Fue Alaswad, Saleh O. Sireesha, Pedaballi Devasenathipathy, Rajkumar Rajan, Jose Yang, Chun-Chen |
| author_sort | Rani, Karuppasamy Kohila |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | Bifunctional electrocatalysts to enable efficient oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential for fabricating high performance metal–air batteries and fuel cells. Here, a defect rich nitrogen and sulfur co-doped graphene/iron carbide (NS-GR/Fe3C) nanocomposite as an electrocatalyst for ORR and OER is demonstrated. An ink of NS-GR/Fe3C is developed by homogeneously dispersing the catalyst in a Nafion containing solvent mixture using an ultrasonication bath (Model-DC150H; power − 150 W; frequency − 40 kHz). The ultrasonically prepared ink is used for preparing the electrode for electrochemical studies. In the case of ORR, the positive half-wave potential displayed by NS-GR/Fe3C is 0.859 V (vs. RHE) and for the OER, onset potential is 1.489 V (vs. RHE) with enhanced current density. The optimized NS–GR/Fe3C electrode exhibited excellent ORR/OER bifunctional activities, high methanol tolerance and excellent long-term cycling stability in an alkaline medium. The observed onset potential for NS–GR/Fe3C electrocatalyst is comparable with the commercial noble metal catalyst, thereby revealing one of the best low-cost alternative air–cathode catalysts for the energy conversion and storage application. |
| first_indexed | 2025-11-15T02:50:46Z |
| format | Article |
| id | ump-28379 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T02:50:46Z |
| publishDate | 2020 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-283792021-01-22T07:44:22Z http://umpir.ump.edu.my/id/eprint/28379/ Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions Rani, Karuppasamy Kohila Karuppiah, Chelladurai Wang, Sea-Fue Alaswad, Saleh O. Sireesha, Pedaballi Devasenathipathy, Rajkumar Rajan, Jose Yang, Chun-Chen TP Chemical technology Bifunctional electrocatalysts to enable efficient oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential for fabricating high performance metal–air batteries and fuel cells. Here, a defect rich nitrogen and sulfur co-doped graphene/iron carbide (NS-GR/Fe3C) nanocomposite as an electrocatalyst for ORR and OER is demonstrated. An ink of NS-GR/Fe3C is developed by homogeneously dispersing the catalyst in a Nafion containing solvent mixture using an ultrasonication bath (Model-DC150H; power − 150 W; frequency − 40 kHz). The ultrasonically prepared ink is used for preparing the electrode for electrochemical studies. In the case of ORR, the positive half-wave potential displayed by NS-GR/Fe3C is 0.859 V (vs. RHE) and for the OER, onset potential is 1.489 V (vs. RHE) with enhanced current density. The optimized NS–GR/Fe3C electrode exhibited excellent ORR/OER bifunctional activities, high methanol tolerance and excellent long-term cycling stability in an alkaline medium. The observed onset potential for NS–GR/Fe3C electrocatalyst is comparable with the commercial noble metal catalyst, thereby revealing one of the best low-cost alternative air–cathode catalysts for the energy conversion and storage application. Elsevier Ltd 2020-03-28 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/28379/1/Direct%20pyrolysis%20and%20ultrasound%20assisted%20preparation.pdf Rani, Karuppasamy Kohila and Karuppiah, Chelladurai and Wang, Sea-Fue and Alaswad, Saleh O. and Sireesha, Pedaballi and Devasenathipathy, Rajkumar and Rajan, Jose and Yang, Chun-Chen (2020) Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions. Ultrasonics Sonochemistry, 66 (105111). pp. 1-9. ISSN 1350-4177. (Published) https://doi.org/10.1016/j.ultsonch.2020.105111 https://doi.org/10.1016/j.ultsonch.2020.105111 |
| spellingShingle | TP Chemical technology Rani, Karuppasamy Kohila Karuppiah, Chelladurai Wang, Sea-Fue Alaswad, Saleh O. Sireesha, Pedaballi Devasenathipathy, Rajkumar Rajan, Jose Yang, Chun-Chen Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions |
| title | Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions |
| title_full | Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions |
| title_fullStr | Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions |
| title_full_unstemmed | Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions |
| title_short | Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions |
| title_sort | direct pyrolysis and ultrasound assisted preparation of n, s co-doped graphene/fe3c nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions |
| topic | TP Chemical technology |
| url | http://umpir.ump.edu.my/id/eprint/28379/ http://umpir.ump.edu.my/id/eprint/28379/ http://umpir.ump.edu.my/id/eprint/28379/ http://umpir.ump.edu.my/id/eprint/28379/1/Direct%20pyrolysis%20and%20ultrasound%20assisted%20preparation.pdf |