Dual electric fields coupled with hollow porous structures synergistically enable efficient electrocatalytic nitrate-to-ammonia conversion

Abstract

A new model A/R-TiO₂/CuO_x electrocatalyst for upcycling nitrate to ammonia is constructed by coupling dual electric fields and hollow porous structures, which can enhance the local concentrations of NO₃⁻ and intermediates, and can lower the energy barrier of *NO to *NOH. Therefore, high NH₃ yield (0.292 mmol h⁻¹ cm⁻²) and Faradaic efficiency (92.31%) at −1.4 V vs. SCE are achieved.