Polyacrylamide Microspheres-Derived Fe<sub>3</sub>C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction Reaction

High-performance non-precious metal catalysts exhibit high electrocatalytic activity for the oxygen-reduction reaction (ORR), which is indispensable for facilitating the development of multifarious renewable energy systems. In this work; N-doped carbon-encapsulated Fe<sub>3</sub>C nanosp...

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Main Authors:	Ming Chen, Yu Jiang, Ping Mei, Yan Zhang, Xianfeng Zheng, Wei Xiao, Qinliang You, Xuemin Yan, Haolin Tang
Format:	Article
Language:	English
Published:	MDPI AG 2019-05-01
Series:	Polymers
Subjects:	polyacrylamide microspheres N-doped carbon Fe<sub>3</sub>C core-shell structure oxygen reduction reaction
Online Access:	https://www.mdpi.com/2073-4360/11/5/767

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spelling	doaj-f4daad5071564b4c92bc87e5ff0c16df2020-11-25T01:13:40ZengMDPI AGPolymers2073-43602019-05-0111576710.3390/polym11050767polym11050767Polyacrylamide Microspheres-Derived Fe<sub>3</sub>C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction ReactionMing Chen0Yu Jiang1Ping Mei2Yan Zhang3Xianfeng Zheng4Wei Xiao5Qinliang You6Xuemin Yan7Haolin Tang8College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, ChinaCollege of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, ChinaCollege of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, ChinaCollege of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, ChinaCollege of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, ChinaCollege of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, ChinaKey Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, ChinaCollege of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, ChinaHigh-performance non-precious metal catalysts exhibit high electrocatalytic activity for the oxygen-reduction reaction (ORR), which is indispensable for facilitating the development of multifarious renewable energy systems. In this work; N-doped carbon-encapsulated Fe<sub>3</sub>C nanosphere ORR catalysts were prepared through simple carbonization of iron precursors loaded with polyacrylamide microspheres. The effect of iron precursors loading on the electrocatalytic activity for ORR was investigated in detail. The electrochemical measurements revealed that the N-doped carbon-encapsulated Fe<sub>3</sub>C nanospheres exhibited outstanding electrocatalytic activity for ORR in alkaline solutions. The optimized catalyst possessed more positive onset potential (0.94 V vs. reversible hydrogen electrode (RHE)), higher diffusion limiting current (5.78 mA cm<sup>−2</sup>), better selectivity (the transferred electron number <i>n</i> > 3.98 at 0.19 V vs. RHE) and higher durability towards ORR than a commercial Pt/C catalyst. The efficient electrocatalytic performance towards ORR can be attributed to the synergistic effect between N-doped carbon and Fe<sub>3</sub>C as catalytic active sites; and the excellent stability results from the core-shell structure of the catalysts.https://www.mdpi.com/2073-4360/11/5/767polyacrylamide microspheresN-doped carbonFe<sub>3</sub>Ccore-shell structureoxygen reduction reaction
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Ming Chen Yu Jiang Ping Mei Yan Zhang Xianfeng Zheng Wei Xiao Qinliang You Xuemin Yan Haolin Tang
spellingShingle	Ming Chen Yu Jiang Ping Mei Yan Zhang Xianfeng Zheng Wei Xiao Qinliang You Xuemin Yan Haolin Tang Polyacrylamide Microspheres-Derived Fe<sub>3</sub>C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction Reaction Polymers polyacrylamide microspheres N-doped carbon Fe<sub>3</sub>C core-shell structure oxygen reduction reaction
author_facet	Ming Chen Yu Jiang Ping Mei Yan Zhang Xianfeng Zheng Wei Xiao Qinliang You Xuemin Yan Haolin Tang
author_sort	Ming Chen
title	Polyacrylamide Microspheres-Derived Fe<sub>3</sub>C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction Reaction
title_short	Polyacrylamide Microspheres-Derived Fe<sub>3</sub>C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction Reaction
title_full	Polyacrylamide Microspheres-Derived Fe<sub>3</sub>C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction Reaction
title_fullStr	Polyacrylamide Microspheres-Derived Fe<sub>3</sub>C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction Reaction
title_full_unstemmed	Polyacrylamide Microspheres-Derived Fe<sub>3</sub>C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction Reaction
title_sort	polyacrylamide microspheres-derived fe<sub>3</sub>c@n-doped carbon nanospheres as efficient catalyst for oxygen reduction reaction
publisher	MDPI AG
series	Polymers
issn	2073-4360
publishDate	2019-05-01
description	High-performance non-precious metal catalysts exhibit high electrocatalytic activity for the oxygen-reduction reaction (ORR), which is indispensable for facilitating the development of multifarious renewable energy systems. In this work; N-doped carbon-encapsulated Fe<sub>3</sub>C nanosphere ORR catalysts were prepared through simple carbonization of iron precursors loaded with polyacrylamide microspheres. The effect of iron precursors loading on the electrocatalytic activity for ORR was investigated in detail. The electrochemical measurements revealed that the N-doped carbon-encapsulated Fe<sub>3</sub>C nanospheres exhibited outstanding electrocatalytic activity for ORR in alkaline solutions. The optimized catalyst possessed more positive onset potential (0.94 V vs. reversible hydrogen electrode (RHE)), higher diffusion limiting current (5.78 mA cm<sup>−2</sup>), better selectivity (the transferred electron number <i>n</i> > 3.98 at 0.19 V vs. RHE) and higher durability towards ORR than a commercial Pt/C catalyst. The efficient electrocatalytic performance towards ORR can be attributed to the synergistic effect between N-doped carbon and Fe<sub>3</sub>C as catalytic active sites; and the excellent stability results from the core-shell structure of the catalysts.
topic	polyacrylamide microspheres N-doped carbon Fe<sub>3</sub>C core-shell structure oxygen reduction reaction
url	https://www.mdpi.com/2073-4360/11/5/767
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Polyacrylamide Microspheres-Derived Fe<sub>3</sub>C@N-doped Carbon Nanospheres as Efficient Catalyst for Oxygen Reduction Reaction

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