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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Main Authors:	Woon, Chee Wai, Islam, M. Amirul, Ethiraj, Baranitharan, Huei, Ruey Ong, Cheng, C. K., Chong, Kwok Feng, Hegde, Gurumurthy, Khan, Maksudur R.
Format:	Article
Language:	English
Published:	Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 2017
Subjects:	Q Science (General) TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/19920/ http://umpir.ump.edu.my/id/eprint/19920/ http://umpir.ump.edu.my/id/eprint/19920/ http://umpir.ump.edu.my/id/eprint/19920/1/fkksa-2017-amirul-Carbon%20Nanotube-Modified%20MnO21.pdf

id	ump-19920
recordtype	eprints
spelling	ump-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 http://dx.doi.org/10.1002/slct.201700741 DOI: 10.1002/slct.201700741
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	Q Science (General) TP Chemical technology
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
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
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
title	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_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_sort	carbon nanotube-modified mno2: an efficient electrocatalyst for oxygen reduction reaction
publisher	Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/19920/ http://umpir.ump.edu.my/id/eprint/19920/ http://umpir.ump.edu.my/id/eprint/19920/ http://umpir.ump.edu.my/id/eprint/19920/1/fkksa-2017-amirul-Carbon%20Nanotube-Modified%20MnO21.pdf
first_indexed	2023-09-18T22:28:33Z
last_indexed	2023-09-18T22:28:33Z
_version_	1777416130376237056

Carbon Nanotube-Modified MnO2: An Efficient Electrocatalyst for Oxygen Reduction Reaction

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