The fundamental electrochemical properties of transition-metal dichalcogenides (TMDs) are discussed. Their inherent electrochemistry is particularly discussed, highlighting the often overlooked fact that such materials possess important and well-defined redox properties. We then move on to discuss the use of these TMDs as electrode-modifier materials for important electrochemical applications. These applications include the probe and detection of redox-active molecules in solution, electrocatalytic hydrogen generation, the oxygen reduction reaction, and the charge storage capabilities for the fabrication of supercapacitors.
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