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 CO2 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, Co3O4 coated on CNT, was reported as an electrocatalytic nitrogen reduction reaction catalyst to generate NH3. Applying CNT as an excellent substrate for growing Co3O4 could effectively improve the electronic conduction properties and boost N-2 adsorption. This catalyst attains a favorable NH3 yield as 27. 16 +/- 2.22 mu g h(-1) mg(cat.)(-1 )at -0.49 V vs. RHE in 0.1 M Na2SO4 solution under ambient conditions. It also shows strong electrochemical durability and excellent selectivity. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

The industrial synthesis of ammonia relies heavily on the Haber-Bosch process, which has significant energy consumption and CO2 emissions. Electrochemical nitrogen-to-ammonia conversion offers a promising alternative powered by renewable energy, but developing suitable catalysts remains a major challenge.