| 초록 |
Ni(OH)2 nanoparticles are grafted to improve the OER (oxygen evolution reaction) performance of the MnO2@CP electrode in this work. The nanocomposites of MnO2 and Ni(OH)₂ combined using hydrothermal synthesis are directly grown onto the carbon paper (CP) electrode. The MnO2 and Ni(OH)2 single particles which grown onto the CPs form a uniform nanowire and nanosheet shapes, respectively, and the MnO2 nanowires are wrapped by Ni(OH)2 nanosheets in the MnO2-Ni(OH)2 composites. These bimetallic composite electrodes exhibit the better OER performances than those of nwMnO2@CP or nsNi(OH)2@CP electrodes. Here, we convince that oxygen vacancies or defects play a significant role in improving the intrinsic activities of catalysts towards the oxygen evolution reaction (OER) and the synergy between nwMnO2 and nsNi(OH)2 allows the adsorbates evolution and lattice-oxygen participated mechanisms simultaneously. |
