Exfoliated colloidal MoS2 nanosheet with predominantly 1T phase for electrocatalytic hydrogen production

Arka Saha; Anirban Paul; Divesh N. Srivastava; Asit B. Panda

doi:10.1016/j.ijhydene.2019.07.099

Exfoliated colloidal MoS₂ nanosheet with predominantly 1T phase for electrocatalytic hydrogen production

Arka Saha, Anirban Paul, Divesh N. Srivastava, Asit B. Panda

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Exfoliated colloidal MoS₂ nano sheets with a size alternating from 5 to 10 nm have been successfully synthesized. The synthesis is accomplished through the formation of MoS₂/TiO₂ heterostructure containing single or weakly bounded 2–3 layer MoS₂ sheets coated on 10–15 nm TiO₂ nanoparticles, followed by selective removal of TiO₂ from the MoS₂/TiO₂ heterostructure. The synthesized sheets contain predominantly 1T phase (80%) with 2H phase. The electrochemical assessment demonstrates that colloidal MoS₂ nano sheets exhibits outstanding performance in electrocatalytic hydrogen evolution reaction (HER) with a very low Tafel slope of 56 mV/dec, low onset overpotential, and excellent cycling stability in acidic media. This process also offers a one-pot method for the large scale production of 1T-MoS₂ in its nano dimension.

Original language	English
Pages (from-to)	18645-18656
Number of pages	12
Journal	International Journal of Hydrogen Energy
Volume	45
Issue number	37
DOIs	https://doi.org/10.1016/j.ijhydene.2019.07.099
State	Published - 24 Jul 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 Hydrogen Energy Publications LLC

Funding

This work was supported by Science and Engineering Research Board , Department of Science and Technology , Government of India [grant numbers EMR/2014/001219 ]. CSIR-CSMCRI Communication No. – 086/2019. Authors like to acknowledge Science and Engineering Research Board (SERB), Department of Science and Technology (DST), India ( EMR/2014/001219 ) for financial support. A. Saha, A. Paul acknowledges UGC and CSIR India, for fellowship. The authors acknowledge the “AESDCIF” of CSMCRI for providing instrumentation facilities. Author also acknowledges MNIT Jaipur for XPS analysis.

Funders	Funder number
Department of Science and Technology, Ministry of Science and Technology, India	EMR/2014/001219
Council of Scientific and Industrial Research, India
University Grants Committee
Science and Engineering Research Board
Department of Science and Technology, Government of Kerala

Keywords

Colloidal MoS sheets
Electrocatalyst
Hydrogen production
Metallic 1T phase
Tafel plot

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2019.07.099

Cite this

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abstract = "Exfoliated colloidal MoS2 nano sheets with a size alternating from 5 to 10 nm have been successfully synthesized. The synthesis is accomplished through the formation of MoS2/TiO2 heterostructure containing single or weakly bounded 2–3 layer MoS2 sheets coated on 10–15 nm TiO2 nanoparticles, followed by selective removal of TiO2 from the MoS2/TiO2 heterostructure. The synthesized sheets contain predominantly 1T phase (80%) with 2H phase. The electrochemical assessment demonstrates that colloidal MoS2 nano sheets exhibits outstanding performance in electrocatalytic hydrogen evolution reaction (HER) with a very low Tafel slope of 56 mV/dec, low onset overpotential, and excellent cycling stability in acidic media. This process also offers a one-pot method for the large scale production of 1T-MoS2 in its nano dimension.",

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AU - Paul, Anirban

AU - Srivastava, Divesh N.

AU - Panda, Asit B.

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AB - Exfoliated colloidal MoS2 nano sheets with a size alternating from 5 to 10 nm have been successfully synthesized. The synthesis is accomplished through the formation of MoS2/TiO2 heterostructure containing single or weakly bounded 2–3 layer MoS2 sheets coated on 10–15 nm TiO2 nanoparticles, followed by selective removal of TiO2 from the MoS2/TiO2 heterostructure. The synthesized sheets contain predominantly 1T phase (80%) with 2H phase. The electrochemical assessment demonstrates that colloidal MoS2 nano sheets exhibits outstanding performance in electrocatalytic hydrogen evolution reaction (HER) with a very low Tafel slope of 56 mV/dec, low onset overpotential, and excellent cycling stability in acidic media. This process also offers a one-pot method for the large scale production of 1T-MoS2 in its nano dimension.

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