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A flexible high-performance oxygen evolution electrode with three-dimensional NiCo2O4 core-shell nanowires

2014; Elsevier BV; Volume: 11; Linguagem: Inglês

10.1016/j.nanoen.2014.11.021

2211-3282

Rong Chen, Hsin‐Yi Wang, Jianwei Miao, Hongbin Yang, Bin Liu,

Fuel Cells and Related Materials

Three-dimensional NiCo2O4 core-shell nanowires made up of NiCo2O4 nanowire core and NiCo2O4 nanoflake shell have been fabricated by a simple two-step wet chemical method on flexible conductive carbon cloth substrate for oxygen evolution reaction (OER). The combination of high surface area, enhanced mass and charge transport as well as three-dimensional conducting pathway enables superior oxygen evolution reaction. Notably, the NiCo2O4 core-shell nanowire electrode exhibits large anodic current and low onset overpotential for OER with an overpotential of~320 mV at a current density of 10 mA/cm2. Furthermore, the NiCo2O4 core-shell nanowire electrode possesses excellent electrocatalytic stability with long hour electrolysis showing no visible degradation, which is highly desirable for a promising OER electrocatalyst.