| 초록 |
This study focuses on its electrochemical properties depending on the specific structure of Co-Mn bimetallic electrocatalyst and on the amount of active species. The catalysts of four types are prepared by following a solvothermal process and coated on a NiOOH/NF support electrode (NNF). Compared to the CoO and Mn2O3 single particle-assembled electrodes, the CoMn2O4/NNF electrode coated with the flower shaped CoMn2O4 bimetallic particle displays the higher stability in HER. The double-layer capacitance of the CoMn2O4/NNF electrode (25.6 mF cm-2) is approximately three or four times higher than those of the CoO/NNF and Mn2O3/NNF electrodes, meaning that the CoMn2O4/NNF electrode has a larger electrochemical active surface area. The CoMn2O4/NNF electrode additionally has a low overpotential (132 mV), It is demonstrated that the structural characteristic of CoMn2O4 contributes to the excellent stability in a long-term HER test. Thus, the experimental and theoretical findings in this study prove the excellent HER performance of CoMn2O4 particles. |
