Performance of graphene oxide-supported Co3O4 with assisted urea as electrocatalysts for oxygen reduction reaction in PEMFCs
In this work, cobalt oxide (Co3O4) nanoparticles supported on a graphene oxide (GO) electrocatalyst were synthesized using a simple and low-cost hydrothermal route for oxygen reduction reaction (ORR) in fuel cells. The effects of varying the urea concentration on the physicochemical and electrochemi...
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Penerbit Universiti Kebangsaan Malaysia
2025
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| Online Access: | http://journalarticle.ukm.my/25076/1/SSB%2023.pdf http://journalarticle.ukm.my/25076/ https://www.ukm.my/jsm/english_journals/vol54num1_2025/contentsVol54num1_2025.html |
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| author | Nur Ubaidah Saidin, Nurul Noramelya Zulkefli, Nor Ezzati Amira Mustapa Padzir, Nurazila Mat Zali, Thye, Foo Choo Rozan Mohamad Yunus, Mohd Shahbudin Masdar, |
| author_facet | Nur Ubaidah Saidin, Nurul Noramelya Zulkefli, Nor Ezzati Amira Mustapa Padzir, Nurazila Mat Zali, Thye, Foo Choo Rozan Mohamad Yunus, Mohd Shahbudin Masdar, |
| author_sort | Nur Ubaidah Saidin, |
| building | Tun Sri Lanang Library |
| collection | Institutional Repository |
| content_provider | Universiti Kebangsaan Malaysia |
| content_source | UKM Journal Article Repository |
| continent | Asia |
| country | Malaysia |
| description | In this work, cobalt oxide (Co3O4) nanoparticles supported on a graphene oxide (GO) electrocatalyst were synthesized using a simple and low-cost hydrothermal route for oxygen reduction reaction (ORR) in fuel cells. The effects of varying the urea concentration on the physicochemical and electrochemical characteristics were investigated in alkaline media using field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), Raman spectroscopy, cyclic voltammetry (CV), linear sweep voltammetry (LSV), and chronoamperometry. The electrocatalyst prepared using cobalt acetate tetrahydrate and urea with a molar ratio of 1:1 exhibited the best ORR activity where the highest onset potential (Eonset) at 0.88 V through four-electron mechanism at 25 °C. The synthesized electrocatalyst also showed improved stability compared with Pt/C. Although CN1-1 exhibits a lower power density (37.9 mW cm⁻2) compared to Pt/C (173.6 mW cm⁻2), it is still expected to be suitable as an ORR electrocatalyst for proton exchange membrane fuel cells (PEMFCs). |
| format | Article |
| id | my-ukm.journal.25076 |
| institution | Universiti Kebangsaan Malaysia |
| language | en |
| publishDate | 2025 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| record_format | eprints |
| spelling | my-ukm.journal.250762025-04-14T07:01:31Z http://journalarticle.ukm.my/25076/ Performance of graphene oxide-supported Co3O4 with assisted urea as electrocatalysts for oxygen reduction reaction in PEMFCs Nur Ubaidah Saidin, Nurul Noramelya Zulkefli, Nor Ezzati Amira Mustapa Padzir, Nurazila Mat Zali, Thye, Foo Choo Rozan Mohamad Yunus, Mohd Shahbudin Masdar, In this work, cobalt oxide (Co3O4) nanoparticles supported on a graphene oxide (GO) electrocatalyst were synthesized using a simple and low-cost hydrothermal route for oxygen reduction reaction (ORR) in fuel cells. The effects of varying the urea concentration on the physicochemical and electrochemical characteristics were investigated in alkaline media using field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), Raman spectroscopy, cyclic voltammetry (CV), linear sweep voltammetry (LSV), and chronoamperometry. The electrocatalyst prepared using cobalt acetate tetrahydrate and urea with a molar ratio of 1:1 exhibited the best ORR activity where the highest onset potential (Eonset) at 0.88 V through four-electron mechanism at 25 °C. The synthesized electrocatalyst also showed improved stability compared with Pt/C. Although CN1-1 exhibits a lower power density (37.9 mW cm⁻2) compared to Pt/C (173.6 mW cm⁻2), it is still expected to be suitable as an ORR electrocatalyst for proton exchange membrane fuel cells (PEMFCs). Penerbit Universiti Kebangsaan Malaysia 2025 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/25076/1/SSB%2023.pdf Nur Ubaidah Saidin, and Nurul Noramelya Zulkefli, and Nor Ezzati Amira Mustapa Padzir, and Nurazila Mat Zali, and Thye, Foo Choo and Rozan Mohamad Yunus, and Mohd Shahbudin Masdar, (2025) Performance of graphene oxide-supported Co3O4 with assisted urea as electrocatalysts for oxygen reduction reaction in PEMFCs. Sains Malaysiana, 54 (1). pp. 291-302. ISSN 0126-6039 https://www.ukm.my/jsm/english_journals/vol54num1_2025/contentsVol54num1_2025.html |
| spellingShingle | Nur Ubaidah Saidin, Nurul Noramelya Zulkefli, Nor Ezzati Amira Mustapa Padzir, Nurazila Mat Zali, Thye, Foo Choo Rozan Mohamad Yunus, Mohd Shahbudin Masdar, Performance of graphene oxide-supported Co3O4 with assisted urea as electrocatalysts for oxygen reduction reaction in PEMFCs |
| title | Performance of graphene oxide-supported Co3O4 with assisted urea as electrocatalysts for oxygen reduction reaction in PEMFCs |
| title_full | Performance of graphene oxide-supported Co3O4 with assisted urea as electrocatalysts for oxygen reduction reaction in PEMFCs |
| title_fullStr | Performance of graphene oxide-supported Co3O4 with assisted urea as electrocatalysts for oxygen reduction reaction in PEMFCs |
| title_full_unstemmed | Performance of graphene oxide-supported Co3O4 with assisted urea as electrocatalysts for oxygen reduction reaction in PEMFCs |
| title_short | Performance of graphene oxide-supported Co3O4 with assisted urea as electrocatalysts for oxygen reduction reaction in PEMFCs |
| title_sort | performance of graphene oxide-supported co3o4 with assisted urea as electrocatalysts for oxygen reduction reaction in pemfcs |
| url | http://journalarticle.ukm.my/25076/1/SSB%2023.pdf http://journalarticle.ukm.my/25076/ https://www.ukm.my/jsm/english_journals/vol54num1_2025/contentsVol54num1_2025.html |
| url_provider | http://journalarticle.ukm.my/ |