Chemically exfoliated ReS2 nanosheets

Takeshi Fujita; Yoshikazu Ito; Yongwen Tan; Hisato Yamaguchi; Daisuke Hojo; Akihiko Hirata; Damien Voiry; Manish Chhowalla; Mingwei Chen

doi:10.1039/C4NR03740E

Chemically exfoliated ReS₂ nanosheets†

Takeshi Fujita,*^a Yoshikazu Ito,^a Yongwen Tan,^a Hisato Yamaguchi,^b Daisuke Hojo,^a Akihiko Hirata,^a Damien Voiry,^c Manish Chhowalla^c and Mingwei Chen*^ad

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* Corresponding authors

^a WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
E-mail: tfujita@wpi-aimr.tohoku.ac.jp, mwchen@wpi-aimr.tohoku.ac.jp

^b MPA11 Materials Synthesis and Integrated Devices (MSID), Materials Physics and Applications (MPA) Division, Mail Stop: K763, Los Alamos National Laboratory (LANL), P.O. Box 1663, Los Alamos, NM 87545, USA

^c Materials Science and Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, USA

^d State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, PR China

Abstract

The production of two-dimensional rhenium disulfide (ReS₂) nanosheets by exfoliation using lithium intercalation is demonstrated. The vibrational and photoluminescence properties of the exfoliated nanosheets are investigated, and the local atomic structure is studied by scanning and transmission electron microscopy. The catalytic activity of the nanosheets in a hydrogen evolution reaction (HER) is also investigated. The electrochemical properties of the exfoliated ReS₂ nanosheets include low overpotentials of ∼100 mV and low Tafel slopes of 75 mV dec⁻¹ for HER and are attributed to the atomic structure of the superlattice 1T′ phase. The presence of bandgap photoluminescence demonstrates that the nanosheets retain their semiconducting nature. ReS₂ nanosheets produced by this method provide unique photocatalytic properties that are superior to those of other two-dimensional systems.

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Article information

DOI: https://doi.org/10.1039/C4NR03740E
Article type: Communication
Submitted: 04 Jul 2014
Accepted: 28 Aug 2014
First published: 02 Sep 2014

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Nanoscale, 2014,6, 12458-12462

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Chemically exfoliated ReS₂ nanosheets

T. Fujita, Y. Ito, Y. Tan, H. Yamaguchi, D. Hojo, A. Hirata, D. Voiry, M. Chhowalla and M. Chen, Nanoscale, 2014, 6, 12458 DOI: 10.1039/C4NR03740E

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