Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst
In this study, the potential of mesoporous flower-like Co3O4 is investigated for the application of oxygen reduction reaction (ORR) in aqueous air-cathode microbial fuel cell (MFC). The flower-like Co3O4 was prepared by a hydrothermal route. The X-ray photoelectron spectroscopy results suggested tha...
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| Format: | Article |
| Language: | English |
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Elsevier Ltd
2017
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| Online Access: | http://umpir.ump.edu.my/id/eprint/18392/ http://umpir.ump.edu.my/id/eprint/18392/7/Enhanced%20Oxygen%20Reduction%20Reaction%20In%20Air-Cathode%20Microbial%20Fuel%20Cells%20Using%20Flower-Like%20Co3O4%20As%20An%20Efficient%20Cathode%20Catalyst.pdf |
| _version_ | 1848820660911996928 |
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| author | Kumar, Ravinder Singh, Lakhveer Zularisam, A. W. |
| author_facet | Kumar, Ravinder Singh, Lakhveer Zularisam, A. W. |
| author_sort | Kumar, Ravinder |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | In this study, the potential of mesoporous flower-like Co3O4 is investigated for the application of oxygen reduction reaction (ORR) in aqueous air-cathode microbial fuel cell (MFC). The flower-like Co3O4 was prepared by a hydrothermal route. The X-ray photoelectron spectroscopy results suggested that flower-like Co3O4 contained positively charged ions i.e., Co2+/Co3+ on its surface that probably acted as ORR active sites. The electrochemical tests demonstrated that flower-like Co3O4 enhanced the electrocatalytic activity of the cathode significantly as the onset potentials obtained in cyclic voltammetry and linear sweep voltammetry were more positive than the bare cathode. Besides, Tafel plots showed that Co3O4 increased the electron transfer kinetics and achieved an exchange current density of 2.46 A/m2, which was ∼30% higher than bare cathode. Subsequently, this improved ORR activity increased the power output in the MFC and a maximum power density of 248 mW/m2 was achieved, which was 6.3 times higher than the bare cathode. The higher ORR activity and improved electric output in the MFC could be attributed to the excellent electrocatalytic activity of Co2+/Co3+ and mesoporous nature of flower-like Co3O4 that exposed extra active sites for oxygen molecules on the cathode surface. |
| first_indexed | 2025-11-15T02:12:59Z |
| format | Article |
| id | ump-18392 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T02:12:59Z |
| publishDate | 2017 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-183922019-08-28T02:54:38Z http://umpir.ump.edu.my/id/eprint/18392/ Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst Kumar, Ravinder Singh, Lakhveer Zularisam, A. W. T Technology (General) In this study, the potential of mesoporous flower-like Co3O4 is investigated for the application of oxygen reduction reaction (ORR) in aqueous air-cathode microbial fuel cell (MFC). The flower-like Co3O4 was prepared by a hydrothermal route. The X-ray photoelectron spectroscopy results suggested that flower-like Co3O4 contained positively charged ions i.e., Co2+/Co3+ on its surface that probably acted as ORR active sites. The electrochemical tests demonstrated that flower-like Co3O4 enhanced the electrocatalytic activity of the cathode significantly as the onset potentials obtained in cyclic voltammetry and linear sweep voltammetry were more positive than the bare cathode. Besides, Tafel plots showed that Co3O4 increased the electron transfer kinetics and achieved an exchange current density of 2.46 A/m2, which was ∼30% higher than bare cathode. Subsequently, this improved ORR activity increased the power output in the MFC and a maximum power density of 248 mW/m2 was achieved, which was 6.3 times higher than the bare cathode. The higher ORR activity and improved electric output in the MFC could be attributed to the excellent electrocatalytic activity of Co2+/Co3+ and mesoporous nature of flower-like Co3O4 that exposed extra active sites for oxygen molecules on the cathode surface. Elsevier Ltd 2017 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/18392/7/Enhanced%20Oxygen%20Reduction%20Reaction%20In%20Air-Cathode%20Microbial%20Fuel%20Cells%20Using%20Flower-Like%20Co3O4%20As%20An%20Efficient%20Cathode%20Catalyst.pdf Kumar, Ravinder and Singh, Lakhveer and Zularisam, A. W. (2017) Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst. International Journal of Hydrogen Energy, 42 (30). pp. 19287-19295. ISSN 0360-3199. (Published) https://doi.org/10.1016/j.ijhydene.2017.06.065 DOI: 10.1016/j.ijhydene.2017.06.065 |
| spellingShingle | T Technology (General) Kumar, Ravinder Singh, Lakhveer Zularisam, A. W. Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst |
| title | Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst |
| title_full | Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst |
| title_fullStr | Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst |
| title_full_unstemmed | Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst |
| title_short | Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst |
| title_sort | enhanced oxygen reduction reaction in air-cathode microbial fuel cells using flower-like co3o4 as an efficient cathode catalyst |
| topic | T Technology (General) |
| url | http://umpir.ump.edu.my/id/eprint/18392/ http://umpir.ump.edu.my/id/eprint/18392/ http://umpir.ump.edu.my/id/eprint/18392/ http://umpir.ump.edu.my/id/eprint/18392/7/Enhanced%20Oxygen%20Reduction%20Reaction%20In%20Air-Cathode%20Microbial%20Fuel%20Cells%20Using%20Flower-Like%20Co3O4%20As%20An%20Efficient%20Cathode%20Catalyst.pdf |