Sol-gel derived spinel MxCo3−xO4 (M=Ni, Cu; 0≤x≤1) films and oxygen evolution ☆
Sol-gel derived spinel MxCo3−xO4 (M=Ni, Cu; 0≤x≤1) films and oxygen evolution ☆
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DOI：
10.1016/s0013-4686(99)00413-2
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发表时间：
2000-02
影响因子：
6.6
通讯作者：
Ravindra Singh;J. Pandey;N. Singh;B. Lal;P. Chartier;J. Koenig
中科院分区：
文献类型：
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作者：
Ravindra Singh;J. Pandey;N. Singh;B. Lal;P. Chartier;J. Koenig
Spinel-type binary transition metal oxides of cobalt and nickel (or copper) with composition MxCo3−xO4(where M=Ni, Cu; 0≤x≤1) were synthesized in film forms by a sol-gel route and their physicochemical and electrocatalytic properties have been investigated using SEM, XRD, cyclic and stationary voltammetries. The roughness factors, RF, of electrodes made of these films were determined by AC-impedance and cyclic voltammetry (CV). The two procedures compared well, and enabled the discrimination between apparent and true (real) electroactivity towards the oxygen evolution reaction (OER). Intermediate compositions showed a higher activity despite a lower real surface area, and laboratory tests at 70°C in 30 wt% KOH good practical performances.
