Impedance Analysis of High-Entropy Alloy for Ammonia Synthesis
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Date
2025
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Abstract
Ammonia is gaining significant importance as a renewable energy carrier, driving global interest in sustainable production methods, such as electrochemical nitrogen or nitrate reduction. Due to the low yield in electrochemical ammonia synthesis, research on new catalyst materials, such as high-entropy alloys, has become increasingly significant, necessitating a deeper analysis of their catalytic behavior. In this context, electrochemical impedance spectroscopy is a valuable and versatile technique. This review presents a comprehensive impedance analysis of high-entropy alloys as catalysts for the electrochemical nitrogen reduction reaction and nitrogen oxoanions reduction reaction for ammonia generation at room temperature, highlighting the complexity of the system and the need for a multidisciplinary approach to understand the microstructural and electrochemical mechanisms.
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Keywords
High-entropy, Alloys, Electrochemical methods, Impedance