Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction
In this work, manganese dioxide/carbon nanotube (MnO2/CNT) have been synthesized by sonochemical-coprecipitation method and demonstrated that it could be an effective electrocatalyst for oxygen reduction reaction (ORR). Moreover, the effect of CNT inclusion with MnO2 was also investigated for ORR. T...
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Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
2017
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| Online Access: | http://umpir.ump.edu.my/id/eprint/19920/1/fkksa-2017-amirul-Carbon%20Nanotube-Modified%20MnO21.pdf http://umpir.ump.edu.my/id/eprint/19920/ http://dx.doi.org/10.1002/slct.201700741 |
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| author | Woon, Chee Wai Islam, M. Amirul Ethiraj, Baranitharan Huei, Ruey Ong Cheng, C. K. Chong, Kwok Feng Hegde, Gurumurthy Khan, Maksudur R. |
| author_facet | Woon, Chee Wai Islam, M. Amirul Ethiraj, Baranitharan Huei, Ruey Ong Cheng, C. K. Chong, Kwok Feng Hegde, Gurumurthy Khan, Maksudur R. |
| author_sort | Woon, Chee Wai |
| building | UMPSA Library |
| collection | Institutional Repository |
| content_provider | Universiti Malaysia Pahang Al-Sultan Abdullah |
| content_source | UMPSA Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | In this work, manganese dioxide/carbon nanotube (MnO2/CNT) have been synthesized by sonochemical-coprecipitation method and demonstrated that it could be an effective electrocatalyst for oxygen reduction reaction (ORR). Moreover, the effect of CNT inclusion with MnO2 was also investigated for ORR. The physical and electrochemical properties of the MnO2/CNT were examined by powder X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR) spectroscopy, Brunauer-Emmett-Teller (BET), Transmission Electron Microscopy (TEM), Field Emission Scanning Electron Microscopy/Energy Dispersive X-ray (FESEM/EDX), Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS), Mott-Schottky and Rotating Disk Electrode (RDE) analysis. CV showed higher currents for the ORR in MnO2/CNT than CNT; however, ORR current dropped when the MnO2 loading was increased from 20–40 %. The EIS analysis showed that charge-transfer resistance for MnO2/CNT was significantly lower compared to the MnO2 indicating that MnO2 has good contact with CNT and the composite possess high electrical conductivity. Mott-Schottky results demonstrated that incorporation of CNT into MnO2 resulted in producing larger electron density in n-type MnO2/CNT compared to MnO2 which is liable for efficient electron donation from the Mn3+ to adsorbed oxygen in the rate determining step. RDE results showed that MnO2/CNT follows 4e− transfer pathway, indicating its ability to act as an effective ORR electrocatalyst. |
| format | Article |
| id | my.ump.umpir.19920 |
| institution | Universiti Malaysia Pahang |
| language | en |
| publishDate | 2017 |
| publisher | Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim |
| record_format | eprints |
| spelling | my.ump.umpir.199202018-01-26T01:33:48Z http://umpir.ump.edu.my/id/eprint/19920/ Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction Woon, Chee Wai Islam, M. Amirul Ethiraj, Baranitharan Huei, Ruey Ong Cheng, C. K. Chong, Kwok Feng Hegde, Gurumurthy Khan, Maksudur R. Q Science (General) TP Chemical technology In this work, manganese dioxide/carbon nanotube (MnO2/CNT) have been synthesized by sonochemical-coprecipitation method and demonstrated that it could be an effective electrocatalyst for oxygen reduction reaction (ORR). Moreover, the effect of CNT inclusion with MnO2 was also investigated for ORR. The physical and electrochemical properties of the MnO2/CNT were examined by powder X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR) spectroscopy, Brunauer-Emmett-Teller (BET), Transmission Electron Microscopy (TEM), Field Emission Scanning Electron Microscopy/Energy Dispersive X-ray (FESEM/EDX), Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS), Mott-Schottky and Rotating Disk Electrode (RDE) analysis. CV showed higher currents for the ORR in MnO2/CNT than CNT; however, ORR current dropped when the MnO2 loading was increased from 20–40 %. The EIS analysis showed that charge-transfer resistance for MnO2/CNT was significantly lower compared to the MnO2 indicating that MnO2 has good contact with CNT and the composite possess high electrical conductivity. Mott-Schottky results demonstrated that incorporation of CNT into MnO2 resulted in producing larger electron density in n-type MnO2/CNT compared to MnO2 which is liable for efficient electron donation from the Mn3+ to adsorbed oxygen in the rate determining step. RDE results showed that MnO2/CNT follows 4e− transfer pathway, indicating its ability to act as an effective ORR electrocatalyst. Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 2017-08-31 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/19920/1/fkksa-2017-amirul-Carbon%20Nanotube-Modified%20MnO21.pdf Woon, Chee Wai and Islam, M. Amirul and Ethiraj, Baranitharan and Huei, Ruey Ong and Cheng, C. K. and Chong, Kwok Feng and Hegde, Gurumurthy and Khan, Maksudur R. (2017) Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction. ChemistrySelect, 2 (25). pp. 7637-7644. ISSN 2365-6549. (Published) http://dx.doi.org/10.1002/slct.201700741 DOI: 10.1002/slct.201700741 |
| spellingShingle | Q Science (General) TP Chemical technology Woon, Chee Wai Islam, M. Amirul Ethiraj, Baranitharan Huei, Ruey Ong Cheng, C. K. Chong, Kwok Feng Hegde, Gurumurthy Khan, Maksudur R. Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction |
| title | Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction |
| title_full | Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction |
| title_fullStr | Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction |
| title_full_unstemmed | Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction |
| title_short | Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction |
| title_sort | carbon nanotube-modified mno2: an efficient electrocatalyst for oxygen reduction reaction |
| topic | Q Science (General) TP Chemical technology |
| url | http://umpir.ump.edu.my/id/eprint/19920/1/fkksa-2017-amirul-Carbon%20Nanotube-Modified%20MnO21.pdf http://umpir.ump.edu.my/id/eprint/19920/ http://dx.doi.org/10.1002/slct.201700741 |
| url_provider | http://umpir.ump.edu.my/ |