Co3O4nanoparticles embedded in porous carbon nanofibers enable efficient nitrate reduction to ammonia

Co 3 O 4 nanoparticle-decorated porous carbon nanofibers show a large NH 3 yield up to 23.4 mg h −1 mg −1 cat and a high FE of 92.7% at −0.7 V vs. reversible hydrogen electrode in 0.1 M NaOH with 0.1 M NO 3 − .