Imaging technique gives catalytic 2-D material engineering a better view

phys.org | 10/4/2019 | Staff
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The properties of 2-D transition metal dichalcogenides are attracting a great deal of interest, and one of the reasons is their catalytic activity. In particular, better catalysts are needed to exploit the potential of water electrolysis—splitting water into its component elements—to provide sustainable energy storage.

"MoS2 is one of the most promising precious rare metal-free catalysts for the hydrogen evolution reaction (HER)," point out Yasufumi Takahashi, Mingwei Chen, and Tomokazu Matsue and their colleagues at Kanazawa University and other collaborating institutions in Japan, the US and the UK in their recent Angewandte Chemie International Edition report. The work highlights the role of "scanning electrochemical cell microscopy" for engineering the catalytic properties of these 2-D materials.

Researchers - Microscopy - Investigations - Activity - MoS2

As the researchers point out, scanning electrochemical microscopy has already proved useful in investigations of the catalytic activity of MoS2 monolayers, which have focused on the effects of strain, as well as the metallic versus semiconducting properties of different microstructural phases of MoS2 on HER catalysis. These studies used a microscale electrode to probe the sample for electrochemical activity as a function of location with high spatial resolution, on account of the microscale dimensions of the electrode.

In their scanning electrochemical...
(Excerpt) Read more at: phys.org
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