Enhanced Oxygen Reduction Reaction In Air-Cathode Microbial Fuel Cells Using Flower-Like Co3O4 As An Efficient Cathode Catalyst

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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Main Authors: Kumar, Ravinder, Singh, Lakhveer, Zularisam, A. W.
Format: Article
Language:English
Published: Elsevier Ltd 2017
Subjects:
T Technology (General)
Online Access: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
id ump-18392
recordtype eprints
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 https://doi.org/10.1016/j.ijhydene.2017.06.065 DOI: 10.1016/j.ijhydene.2017.06.065
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic T Technology (General)
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
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.
format Article
author Kumar, Ravinder
Singh, Lakhveer
Zularisam, A. W.
author_facet Kumar, Ravinder
Singh, Lakhveer
Zularisam, A. W.
author_sort Kumar, Ravinder
title 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_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_sort enhanced oxygen reduction reaction in air-cathode microbial fuel cells using flower-like co3o4 as an efficient cathode catalyst
publisher Elsevier Ltd
publishDate 2017
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
first_indexed 2023-09-18T22:26:02Z
last_indexed 2023-09-18T22:26:02Z
_version_ 1777415972301307904

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