Publication date: 15th December 2025
Electrochemical valorization of nitrogen oxides (NOx) provides a powerful framework for converting air and water pollutants into high-value chemicals, addressing environmental challenges while enabling sustainable pathways for industrial nitrogen management. In this talk, I present two independent research directions that explore complementary electroconversion mechanisms within this broader theme. The first study investigates the direct electrochemical reduction of nitrate (NO3-) to ammonia (NH3) using advanced single-atom catalysts, emphasizing how atomically dispersed active sites, and local coordination environments dictate selectivity and efficiency. Through theory-guided catalyst design, we uncover key intermediates, potential limiting steps, and scaling relationships that inform selective NH3 production. The second study examines NOx as a feedstock for electrochemical upgrading into nitric acid (HNO3) using oxygen-functionalized carbon catalysts. We reveal structure-function correlations that govern product distribution, quantify multi-electron oxidation pathways, and identify catalytic motifs that enable high Faradaic efficiency. While distinct in scope and mechanistic direction, one reductive, the other oxidative, these two studies together demonstrate a unified vision for NOx circularity, uncovering design principles and catalytic handles that accelerate the development of clean nitrogen processing and pollutant-to-product conversion technologies.
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