A simple synthesis of Co3O4@CNT to boost electrochemical nitrogen fixation

The synthesis of ammonia in industrial-scale mainly depends on Haber-Bosch process, which entails huge energy consumption and massive CO 2 emission. Electrocatalytic nitrogen-to-ammonia is a promising alternative, which could be powered by renewable energy source. However, the development of proper catalysts with good yield, superior stability, and excellent selectivity is one of the most challenges for electrochemical reduction of nitrogen. Here, a cost-efficient electrocatalytic material, Co 3 O 4 coated on CNT, was reported as an electrocatalytic nitrogen reduction reaction catalyst to generate NH 3 . Applying CNT as an excellent substrate for growing Co 3 O 4 could effectively improve the electronic conduction properties and boost N 2 adsorption. This catalyst attains a favorable NH 3 yield as 27. 16  ± 2.22 µg h −1 mg cat. −1 at −0.49 V vs. RHE in 0.1 M Na 2 SO 4 solution under ambient conditions. It also shows strong electrochemical durability and excellent selectivity.