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Published in: Journal of Materials Science 40/2022

20-10-2022 | Energy materials

In-situ formation and integration of graphene into MoS2 interlayer spacing: expansion of interlayer spacing for superior hydrogen evolution reaction in acidic and alkaline electrolyte

Authors: Hoa Thi Bui, Do Chi Linh, Lam Duc Nguyen, HyungIl Chang, Supriya A. Patil, Nabeen K. Shrestha, Khuyen Xuan Bui, Tung Son Bui, Thi Ngoc Anh Nguyen, Nguyen Thanh Tung, Sung-Hwan Han, Pham Thy San

Published in: Journal of Materials Science | Issue 40/2022

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Abstract

For the commercial-scale of hydrogen production from water-splitting, developing earth-abundant and competitive price catalysts is highly demanding, but it is challenging to replace the noble metal-based state-of-the-art catalysts. Herein, we report MoS2@graphene (MoS2@Gr) heterostructures materials as a promising hydrogen evolution reaction (HER) electrocatalyst, which is synthesized via in-situ formation and integration of graphene into the interlayer spacing of MoS2, thereby exposing the HER active edge sites via widening of the interlayer spacing. Compared to the pristine MoS2, the MoS2@Gr exhibits a superior HER activity having an overpotential of 120 mV vs. RHE to drive the current density of 10 mA cm−2 with a small Tafel slope of 72 mV dec−1 in 0.5 M H2SO4 solution. In addition, the MoS2@Gr catalyst requires only an overpotential of 170 mV vs. RHE in 1 M KOH electrolyte to drive the HER current densities of 10 mA cm−2 with a smaller Tafel slope of 51 mV dec−1. Moreover, the MoS2@Gr catalyst presents long-term durability against HER in both acidic and alkaline electrolytes.

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Appendix
Available only for authorised users
Literature
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34.
44.
Metadata
Title
In-situ formation and integration of graphene into MoS2 interlayer spacing: expansion of interlayer spacing for superior hydrogen evolution reaction in acidic and alkaline electrolyte
Authors
Hoa Thi Bui
Do Chi Linh
Lam Duc Nguyen
HyungIl Chang
Supriya A. Patil
Nabeen K. Shrestha
Khuyen Xuan Bui
Tung Son Bui
Thi Ngoc Anh Nguyen
Nguyen Thanh Tung
Sung-Hwan Han
Pham Thy San
Publication date
20-10-2022
Publisher
Springer US
Published in
Journal of Materials Science / Issue 40/2022
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-022-07779-4

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