Mn3O4 nanoparticles@reduced graphene oxide composite: An efficient electrocatalyst for artificial N2 fixation to NH3 at ambient conditions
Mn3O4@rGO composite, electrocatalyst, NH3 synthesis, N2 reduction reaction, ambient conditions
Currently, industrial-scale NH3 production almost relies on energy-intensive Haber-Bosch process from atmospheric N2 with large amount of CO2 emission, while low-cost and high-efficient catalysts are demanded for the N2 reduction reaction (NRR). In this study, Mn3O4 nanoparticles@reduced graphene oxide (Mn3O4@rGO) composite is reported as an efficient NRR electrocatalyst with excellent selectivity for NH3 formation. In 0.1 M Na2SO4 solution, such catalyst obtains a NH3 yield of 17.4 µg·h−1·mg−1cat. and a Faradaic efficiency of 3.52% at −0.85 V vs. reversible hydrogen electrode. Notably, it also shows high electrochemical stability during electrolysis process. Density functional theory (DFT) calculations also demonstrate that the (112) planes of Mn3O4 possess superior NRR activity.
Tsinghua University Press
Hong Huang,Feng Gong,Yuan Wang,Huanbo Wang,Xiufeng Wu,Wenbo Lu,Runbo Zhao,Hongyu Chen,Xifeng Shi,Abdullah M. Asiri,Tingshuai Li,Qian Liu,Xuping Sun, Mn3O4 nanoparticles@reduced graphene oxide composite: An efficient electrocatalyst for artificial N2 fixation to NH3 at ambient conditions. NanoRes.2019, 12(5): 1093–1098