2H → 1T Phase Change in Direct Synthesis of WS2 Nanosheets via Solution-Based Electrochemical Exfoliation and Their Catalytic Properties

Shi Xuan Leong, Carmen C. Mayorga-Martinez, Xinyi Chia, Jan Luxa, Zdeněk Sofer, Martin Pumera

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Metallic 1T-WS2 has various interesting properties such as increased density of catalytically active sites on both the basal planes and edges as well as metallic conductivity which allows it to be used in applications such as biosensing and energy devices. Hence, it is highly beneficial to develop a simple, efficient, and low-cost synthesis method of 1T-WS2 nanosheets from commercially available bulk 2H-WS2. In this study, we reported WS2 nanosheets synthesized directly from bulk WS2 via solution-based electrochemical exfoliation with bipolar electrodes and investigated their electrocatalytic performances toward hydrogen evolution and oxygen reduction reactions. We successfully synthesized WS2 nanosheets of regular hexagonal symmetry with a 2H → 1T phase transition. This represents a novel method of producing 1T-WS2 nanosheets from bulk 2H-WS2 without compromising on its electrocatalytic properties.

Original languageEnglish
Pages (from-to)26350-26356
Number of pages7
JournalACS Applied Materials and Interfaces
Volume9
Issue number31
DOIs
Publication statusPublished - 2017 Aug 9

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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