Electrocatalytic reactions involving aqueous nitrate and nitrite

Area of Science:

• Green and Sustainable Chemistry
• Electrocatalysis
• Environmental Science

Background:

• Electrocatalytic upgrading of nitrate (NO3-) and nitrite (NO2-) offers a sustainable route to valuable nitrogenous chemicals from hazardous feedstocks.
• Existing research shows selective conversion to ammonia, hydroxylamine, hydrazine, and organonitrogen compounds, but lacks standardized protocols hindering reproducibility.
• This gap limits cross-laboratory comparisons and the acceleration of electrochemical NO3-/NO2- upgrading strategies.

Purpose of the Study:

• To present a comprehensive and standardized protocol for aqueous nitrate/nitrite electrocatalytic reactions.
• To establish reproducible workflows for researchers in green chemistry, electrocatalysis, nanotechnology, and environmental science.
• To accelerate the development and investigation of electrochemical NO3-/NO2- upgrading technologies.

Main Methods:

• Detailed protocol covers electrode preparation, electrolyzer assembly, electrolysis, product quantification, purification, and in situ characterization.
• Includes essential safety guidelines for handling toxic intermediates.
• Adaptable protocol suitable for various experimental capabilities, from small-scale (<30 ml) to liter-level systems, completing in approximately two weeks.

Main Results:

• A standardized, adaptable, and comprehensive protocol for electrocatalytic nitrate and nitrite upgrading is established.
• The protocol facilitates reproducible experimental setups and analyses.
• It enables technoeconomic analysis and mechanistic investigations across different scales.

Conclusions:

• The developed protocol addresses the need for standardization in electrocatalytic NO3-/NO2- upgrading, promoting reproducibility and comparability.
• This work aims to accelerate research and development in sustainable nitrogenous chemical production.
• The protocol may inspire broader applications in upgrading renewable chemical sources beyond nitrate and nitrite.