| 초록 |
We show that simply by corroding Ni foam in an aqueous solution under ambient conditions, it is possible to produce nanostructured surfaces that are highly active for hydrogen and oxygen evolution reactions in water splitting. When Ni foam was corroded in water or an aqueous solution containing NaCl, a dense array of Ni(OH)2 nanosheets was produced on the surface of the foam, and this catalytic for oxygen evolution reaction. When corroded in the presence of RuCl3, nanoparticles was cbtained, which was highly active for hydrogen evolution reaction. At an applied voltage of 1.7 V, the combination of these two nanostructured surfaces yielded a water-splitting current density more than three times that obtained on the commercial Pt wire electrodes. Oure results suggest that corrosion may be exploited as a useful method of producing functional surfaces for catalysis and other applications. |
