Enhanced electrocatalytic activity of MoSx on TCNQ-treated electrode for hydrogen evolution reaction

Yunghuang Chang, Revannath D. Nikam, Chengte Lin, Jingkai Huang, Chien-Chih Tseng, Changlung Hsu, Chiachin Cheng, Chingyuan Su, Lain-Jong Li, Daniel Chua

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

Molybdenum sulfide has recently attracted much attention because of its low cost and excellent catalytical effects in the application of hydrogen evolution reaction (HER). To improve the HER efficiency, many researchers have extensively explored various avenues such as material modification, forming hybrid structures or modifying geometric morphology. In this work, we reported a significant enhancement in the electrocatalytic activity of the MoSx via growing on Tetracyanoquinodimethane (TCNQ) treated carbon cloth, where the MoSx was synthesized by thermolysis from the ammonium tetrathiomolybdate ((NH4)2MoS4) precursor at 170 °C. The pyridinic N- and graphitic N-like species on the surface of carbon cloth arising from the TCNQ treatment facilitate the formation of Mo5+ and S2 2- species in the MoSx, especially with S2 2- serving as an active site for HER. In addition, the smaller particle size of the MoSx grown on TCNQ-treated carbon cloth reveals a high ratio of edge sites relative to basal plane sites, indicating the richer effective reaction sites and superior electrocatalytic characteristics. Hence, we reported a high hydrogen evolution rate for MoSx on TCNQ-treated carbon cloth of 6408 mL g-1 cm-2 h-1 (286 mmol g-1 cm-2 h-1) at an overpotential of V = 0.2 V. This study provides the fundamental concepts useful in the design and preparation of transition metal dichalcogenide catalysts, beneficial in the development in clean energy.
Original languageEnglish (US)
Pages (from-to)17679-17685
Number of pages7
JournalACS Applied Materials & Interfaces
Volume6
Issue number20
DOIs
StatePublished - Oct 10 2014

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research was supported by National Research Foundation, Prime Minister's Office, Singapore, under its Competitive Research Programme (CRP Award No. NRF-CRP 10-2012-6), Academia Sinica (IAMS and Nano program), and National Science Council Taiwan (NSC-99-2112-M-001-021-MY3). J.L. thanks the support from AOARD-134137.

ASJC Scopus subject areas

  • General Materials Science

Fingerprint

Dive into the research topics of 'Enhanced electrocatalytic activity of MoSx on TCNQ-treated electrode for hydrogen evolution reaction'. Together they form a unique fingerprint.

Cite this