Nitrate reduction to ammonium: from CuO defect engineering to waste NOx-to-NH3economic feasibility

Critical to the feasibility of electrochemical reduction of waste NO_x(NO_xRR), as a sustainable pathway and to close the NO_xcycle for the emerging NH₃economy, is the requirement of inexpensive, scalable and selective catalysts that can generate NH₄⁺with high yield, as indicated by our economic modelling.