Selective synthesis of pure cobalt disulfide on reduced graphene oxide sheets and its high electrocatalytic activity for hydrogen evolution reaction

Seongjoon Ahn; Jieun Yang; Hyunseob Lim; Hyeon Suk Shin

doi:10.1186/s40580-016-0066-x

Selective synthesis of pure cobalt disulfide on reduced graphene oxide sheets and its high electrocatalytic activity for hydrogen evolution reaction

Nano Converg. 2016;3(1):5. doi: 10.1186/s40580-016-0066-x. Epub 2016 Jan 27.

Authors

Seongjoon Ahn^#^{1

2}, Jieun Yang^#³, Hyunseob Lim^{4

2

5}, Hyeon Suk Shin^{4

1

2

5}

Affiliations

¹ Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798 Republic of Korea.
² Low Dimensional Carbon Materials, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798 Republic of Korea.
³ Department of Material Science and Engineering, Rutgers University, Piscataway, NJ 08854 USA.
⁴ Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798 Republic of Korea.
⁵ Center for Multidimensional Carbon Materials, Institute of Basic Science, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 689-798 Republic of Korea.

^# Contributed equally.

Abstract

We synthesized single-phase CoS₂ on a large scale by adding graphene oxide of sufficient quantity via the hydrothermal method using cobalt acetate and thioacetamide as precursors; this produced the hybrid of CoS₂ with reduced graphene oxide which exhibited high electrocatalytic activity in the hydrogen evolution reaction.

Keywords: Cobalt disulfide; Electrocatalyst; Hybrid; Hydrogen evolution reaction; Transition metal dichalcogenides.