울산대학교 | 미래혁신응집물질물리인재교육연구단

High-temperature-treated multiwall carbon nanotubes for hydrogen evolution reaction
작성자	김**	작성일	2019-07-29	조회수	59
Journal Article published Mar 2018 in International Journal of Hydrogen Energy volume 43 issue 13 on pages 6526 to 6531 Research funded by Priority Research Centers Program (2009-0093818) \| Basic Science Research Program (2017R1E1A1A01075350) \| Basic Research Lab Program (2014R1A4A1071686) Authors: Tri Khoa Nguyen, Alexander G. Bannov, Maxim V. Popov, Jong-Won Yun, Anh Duc Nguyen, Yong Soo Kim ttps://doi.org/10.1016/j.ijhydene.2018.02.081 Abstract We investigated the hydrogen evolution reaction (HER) properties of multi-wall carbon nanotubes (MWCNTs) treated at extremely high temperature (2600 °C). The heat treatment not only improves the crystallinity of the MWCNTs, but also reduces the carbon-oxygen (CO) bonding as it is replaced by the defect-carbon (sp³ and CH) bonding. These modifications in the heat treated MWCNT structure lead to the increase of electrochemical charge transfer. The heat treatment of MWCNTs in the composite with Pt (MWCNT-Pt composite) further facilitates electrocatalysis. The MWCNTs-Pt composite shows strong enhancement in the HER performance with an onset of overpotential of ?0.04 V vs reversible hydrogen electrode and a Tafel slope of 10.9 mV/decade. This performance is indeed better than that of Pt, which is the best working material for HER.

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