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Molecules 2016, 21(10), 1318; doi:10.3390/molecules21101318

Growing and Etching MoS2 on Carbon Nanotube Film for Enhanced Electrochemical Performance

National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230029, China
These authors contributed equally to this paper.
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Author to whom correspondence should be addressed.
Academic Editor: Saikat Talapatra
Received: 5 September 2016 / Revised: 25 September 2016 / Accepted: 28 September 2016 / Published: 30 September 2016
(This article belongs to the Special Issue Carbon Nanotubes: Advances and Applications)
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Abstract

In this work we directly synthesized molybdenum disulfide (MoS2) nanosheets on carbon nanotube film (MoS2@CNT) via a two-step chemical vapor deposition method (CVD). By etching the obtained MoS2@CNT into 10% wt HNO3, the morphology of MoS2 decorated on CNT bundles was modulated, resulting in more catalytic active MoS2 edges being exposed for significantly enhanced electrochemical performance. Our results revealed that an 8 h acid etching sample exhibited the best performance for the oxygen evolution reaction, i.e., the current density reached 10 mA/cm2 under 375 mV over-potential, and the tafel slope was as low as 94 mV/dec. The enhanced behavior was mainly originated from the more catalytic sites in MoS2 induced by the acid etching treatment and the higher conductivity from the supporting CNT films. Our study provides a new route to produce two-dimensional layers on CNT films with tunable morphology, and thus may open a window for exploring its promising applications in the fields of catalytic-, electronic-, and electrochemical-related fields. View Full-Text
Keywords: carbon nanotube; molybdenum disulfide; CVD; acid etching; electrochemical performance carbon nanotube; molybdenum disulfide; CVD; acid etching; electrochemical performance
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MDPI and ACS Style

Xu, W.; Fang, Q.; Liu, D.; Zhang, K.; Habib, M.; Wu, C.; Zheng, X.; Liu, H.; Chen, S.; Song, L. Growing and Etching MoS2 on Carbon Nanotube Film for Enhanced Electrochemical Performance. Molecules 2016, 21, 1318.

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