A 3D bi-functional porous N-doped carbon microtube sponge electrocatalyst for oxygen reduction and oxygen evolution reactions

A flexible, large-area three-dimensional porous N-doped carbon microtube (NCMT) sponge was prepared via a simple and low-cost process of pyrolyzing facial cotton. Due to its unique structure with a micron-scale hollow core and well-graphitized and interconnected porous walls, the NCMT sponge exhibit...

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Published inEnergy & environmental science Vol. 9; no. 1; pp. 379 - 384
Main Authors Li, Jin-Cheng, Hou, Peng-Xiang, Zhao, Shi-Yong, Liu, Chang, Tang, Dai-Ming, Cheng, Min, Zhang, Feng, Cheng, Hui-Ming
Format Journal Article
LanguageEnglish
Published 01.01.2016
Subjects
Carbon
Current density
Electrocatalysts
Evolution
Oxygen
Porous walls
Reduction
Sponges
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Summary:A flexible, large-area three-dimensional porous N-doped carbon microtube (NCMT) sponge was prepared via a simple and low-cost process of pyrolyzing facial cotton. Due to its unique structure with a micron-scale hollow core and well-graphitized and interconnected porous walls, the NCMT sponge exhibits incomparable electrocatalytic activity for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) with a small potential difference of 0.63 V between the OER current density at 10 mA cm −2 and the ORR current density at −3 mA cm −2 , which is the best to date. A flexible, dictyophora-like sponge of porous N-doped carbon microtubes demonstrates excellent electrocatalytic activities for both the oxygen reduction reaction and oxygen evolution reaction.
Bibliography:Electronic supplementary information (ESI) available. See DOI
10.1039/c6ee02169g
ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1754-5692
1754-5706
DOI:10.1039/c6ee02169g