| 초록 |
In general, RuO2 and IrO2 are regarded as the most efficient OER electrocatalysts. These noble metal-based catalysts have obvious disadvantages for practical applications. To solve this issue, we used the ATO as high surface area support, which stabilizes the initial catalyst surface area, and hence the mass based activity of the catalysts. In additional, IrNiOx core-shell particles and nanostructured Ir nanodendrites were supported on ATO as efficient and stable water splitting catalysts. Furthermore, the electronic structure of ATO supported IrOx catalyst was also studied using XPS and XAS to propose the role of metal-oxide support. Ir/IrOx/ATO system exhibited evidence of metal/metal−oxide support interactions (MMOSI). Our findings raise the possibility that MMOSI effects in electrochemistry-largely neglected in the past-may be more important for a detailed understanding of the durability of oxide-supported nanoparticle OER catalysts than previously thought. |
