We report defective Cu-rich CuFe2O4 nanofibers as an efficient catalyst for reducing nitrate,which achieves a NH3 yield of 9.21 mg h–1 mg–1cat. and Faradaic efficiency of 91.08% in 0.1 M...

Electrochemical synthesis of ammonia via nitrogen reduction reaction is a rational route to save energy and relieve pollution compared to the traditional Haber-Bosch process. In this report, ZrO 2 nanosphere derived from thermolysis of Zr-based biphenyl-4,4'-dicarboxylic acid MOFs (ZrO 2 /C) as a non-noble metal catalyst with large specific surface area and porous structure is proposed to fix nitrogen to ammonia at ambient conditions. Such catalyst achieves Faradaic efficiency of 11.86 % and a NH 3 yield rate of 10.72 μg h À 1 mg À 1 cat. at À 0.6 V vs. the reversible hydrogen electrode in 0.1 M Na 2 SO 4 . First-principles calculations confirm the alternating reaction at the catalyst surface.

High-performance earth-abundant electrocatalysts for oxygen evolution reaction (OER) are highly desirable. In this report, we successfully synthesized amorphous FeÀ P shell electrodeposited on Co(OH)F nanowire arrays supported on titanium mesh (FeÀ P@Co(OH)F/TM) as an efficient catalyst for OER. Such catalyst exhibits excellent OER activity with a low overpotential of 267 mV to reach the geometrical current density of 10 mA cm À 2 in 1.0 M KOH. In addition, it has good electrochemical durability to maintain its activity for at least 20 h.