Enhancement of electrochemical and catalytic properties of MoS2 through ball-milling

Adriano Ambrosi, Xinyi Chia, Zdeněk Sofer, Martin Pumera

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

MoS2 nanosheets of one to few layer thickness present novel electronic and enhanced catalytic properties with respect to the bulk material. Here we show that a simple and highly scalable ball-milling procedure can lead to significant improvements of the electrochemical and catalytic properties of the bulk natural MoS2. We characterized the material before and after the milling process by means of scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy in order to evaluate morphological and chemical features. We investigated the electrochemical properties by means of voltammetry techniques to monitor the electron transfer with [Fe(CN)6]4 -/3 - redox probe and the catalytic properties by monitoring the electrochemical hydrogen evolution reaction (HER). A significant overpotential lowering of about 210 mV is obtained for the HER by the ball-milled material when compared to bulk materials. This has a huge potential for the lowering of the energy consumption during hydrogen evolution. Ball-milling offers highly scalable dry method for large scale production of electrocatalyst with enhanced properties.

Original languageEnglish
Pages (from-to)36-40
Number of pages5
JournalElectrochemistry Communications
Volume54
DOIs
Publication statusPublished - 2015 Jan 1

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Ball milling
Hydrogen
Nanosheets
Electrocatalysts
Voltammetry
Electrochemical properties
Energy utilization
X ray photoelectron spectroscopy
Scanning electron microscopy
Electrons
Monitoring

All Science Journal Classification (ASJC) codes

  • Electrochemistry

Cite this

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abstract = "MoS2 nanosheets of one to few layer thickness present novel electronic and enhanced catalytic properties with respect to the bulk material. Here we show that a simple and highly scalable ball-milling procedure can lead to significant improvements of the electrochemical and catalytic properties of the bulk natural MoS2. We characterized the material before and after the milling process by means of scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy in order to evaluate morphological and chemical features. We investigated the electrochemical properties by means of voltammetry techniques to monitor the electron transfer with [Fe(CN)6]4 -/3 - redox probe and the catalytic properties by monitoring the electrochemical hydrogen evolution reaction (HER). A significant overpotential lowering of about 210 mV is obtained for the HER by the ball-milled material when compared to bulk materials. This has a huge potential for the lowering of the energy consumption during hydrogen evolution. Ball-milling offers highly scalable dry method for large scale production of electrocatalyst with enhanced properties.",
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Enhancement of electrochemical and catalytic properties of MoS2 through ball-milling. / Ambrosi, Adriano; Chia, Xinyi; Sofer, Zdeněk; Pumera, Martin.

In: Electrochemistry Communications, Vol. 54, 01.01.2015, p. 36-40.

Research output: Contribution to journalArticle

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AU - Ambrosi, Adriano

AU - Chia, Xinyi

AU - Sofer, Zdeněk

AU - Pumera, Martin

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AB - MoS2 nanosheets of one to few layer thickness present novel electronic and enhanced catalytic properties with respect to the bulk material. Here we show that a simple and highly scalable ball-milling procedure can lead to significant improvements of the electrochemical and catalytic properties of the bulk natural MoS2. We characterized the material before and after the milling process by means of scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy in order to evaluate morphological and chemical features. We investigated the electrochemical properties by means of voltammetry techniques to monitor the electron transfer with [Fe(CN)6]4 -/3 - redox probe and the catalytic properties by monitoring the electrochemical hydrogen evolution reaction (HER). A significant overpotential lowering of about 210 mV is obtained for the HER by the ball-milled material when compared to bulk materials. This has a huge potential for the lowering of the energy consumption during hydrogen evolution. Ball-milling offers highly scalable dry method for large scale production of electrocatalyst with enhanced properties.

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