In Situ/Operando Methods for Understanding Electrocatalytic Nitrate Reduction Reaction.

Area of Science:

• Environmental Chemistry
• Electrochemistry
• Materials Science

Background:

• Industrial and agricultural development generate significant nitrate pollution, disrupting ecosystems and public health.
• Electrochemical nitrate reduction (eNRR) is a promising, eco-friendly technology for nitrate remediation.
• Understanding the eNRR mechanism is vital for developing efficient electrocatalysts.

Purpose of the Study:

• To review the mechanism of electrochemical nitrate reduction (eNRR).
• To summarize and introduce in situ techniques applicable to eNRR studies.
• To discuss challenges and future directions in eNRR research.

Main Methods:

• Review of existing literature on eNRR mechanisms and characterization techniques.
• Detailed introduction of various in situ and operando techniques.
• Analysis of how these techniques aid in elucidating the reaction pathway.

Main Results:

• Traditional characterization methods are insufficient for deep mechanistic studies of eNRR.
• In situ and operando techniques provide time-resolved, atomic-level insights into the eNRR process.
• Various advanced techniques are presented with their specific contributions to understanding eNRR.

Conclusions:

• Developing and applying advanced in situ techniques are essential for mechanistic understanding of eNRR.
• Further research is needed to overcome current challenges and unlock the full potential of eNRR.
• This review provides a roadmap for future catalyst design and mechanistic investigations in eNRR.