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Highly active electrocatalyst cobalt-carbide nanoparticles synthesized by wet-chemistry method for hydrogen evolution reaction

Yi-Heng Lin

Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan

E-mail Address: x01n01n01n@gmail.com

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Po-Chia Huang

Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan

E-mail Address: ma01a206@stust.edu.tw

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Sheng-Chang Wang

Department of Mechanical Engineering, Southern Taiwan University of Science and Technology, Tainan 710, Taiwan

E-mail Address: scwang@stust.edu.tw

Corresponding author.

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Jow-Lay Huang

Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan

Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan

Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 701, Taiwan

E-mail Address: JLH888@mail.ncku.edu.tw

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https://doi.org/10.1142/S0217984920400229Cited by:0 (Source: Crossref)

This article is part of the issue:

SPECIAL ISSUE — International Conference on Nanomaterials and Advanced Composites (NAC2019)
Guest Editors: Yun Hae Kim, Chang-Mo Wu and Pankaj Koinkar

Abstract

Hydrogen is a promising alternative energy without greenhouse gas emissions. The transition metal carbides (TMCs) are considered a sustainable alternatives to noble metals in catalysis. Among the TMCs, Co $_{x}$ $_{x}$ C ( $x$ $x$ = 2, 3) nanoparticles (NPs) act as an excellent electrocatalyst for hydrogen evolution reaction (HER) by water splitting. In our report, Co $_{x}$ $_{x}$ C nanocomposites were synthesized by wet chemistry method using cobalt (II) acetate, sodium hydroxide as precursors and triethylene glycol as solvent. In addition, Co₂C NPs were synthesized by similar wet chemistry method using cobalt (II) acetate as precursors and triethylene glycol, oleylamine as solvent. The cobalt carbide NPs exhibited high electrocatalytic activity. Co $_{x}$ $_{x}$ C nanocomposites performed a −0.33 V onset potential and 91 mV/dec Tafel slope, while the Co₂C NPs exhibited a better performance of −0.27 V and 60 mV/dec, respectively.

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