Enhancing Hydrogen Evolution Catalysis through Potential-Induced Structural Phase Transition in Transition-Metal Dichalcogenide Thin Sheets

I. Wen Peter Chen, Yi Lun Tseng, Jeremiah Hao Ran Huang, Kuan Lun Chen, Tsai Yun Liu, Jui Chin Lee

研究成果: Article同行評審

3 引文 斯高帕斯(Scopus)

摘要

Enhancing electrocatalytic performance relies on effective phase control, which influences key catalytic properties, such as chemical stability and electrical conductivity. Traditional methods for manipulating the phase of transition-metal dichalcogenides (TMDs), including high-temperature synthesis, Li intercalation, and doping, involve harsh conditions and energy-intensive processes. This study introduces an innovative approach to crafting heterophase structures (2H-1T-WS2) in TMDs, using WS2 as a model compound, encompassing both semiconducting (2H) and metallic (1T) types through a straightforward potential activation method. Insights from in situ electrochemical Raman spectroscopy, HR-TEM, and XPS measurements reveal distinctive partial phase-transition behavior. This behavior enables the partially exposed basal plane of 2H-1T-WS2 to demonstrate superior activity in the hydrogen evolution reaction (HER), attributed to enhanced electrical conductivity and the exposure of highly active sites. The potential-induced phase transition presents promising avenues for the development of catalysts with heterophase structures.

原文English
頁(從 - 到)2287-2292
頁數6
期刊Journal of Physical Chemistry Letters
15
DOIs
出版狀態Published - 2024

All Science Journal Classification (ASJC) codes

  • 一般材料科學
  • 物理與理論化學

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