The anodic polarization characteristics of nickel-metal oxide film electrodes in alkaline solution.

The Oxygen Evolution Reaction on Passive Oxide Covered Transition Metal Electrodes in Aqueous Alkaline Solution. Part 1-Nickel

Various aspects of the oxygen evolution reaction (OER) at passive oxide covered polycrystalline Ni electrodes in aqueous alkaline solution were investigated using electrochemical techniques. Steady state polarisation and electrochemical impedance spectroscopy (EIS) were used to measure kinetically significant parameters including the Tafel slope and the reaction order with respect to OH activit...

Determination of reaction resistances for metal-hydride electrodes during anodic polarization

Ž . The anodic polarization process in metal-hydride electrodes occurs via the following consecutive steps: i diffusion of absorbed Ž . hydrogen from the bulk to the surface of the electrode, ii hydrogen transfer from absorbed state to adsorbed state at the electrode Ž . surface, and iii electrochemical oxidation of the adsorbed hydrogen on the electrode surface. A theoretical treatment is pres...

The Oxygen Evolution Reaction on Passive Oxide Covered Transition Metal Electrodes in Alkaline Solution Part II - Cobalt

Details are outlined of an electrochemical investigation of the oxygen evolution reaction (OER) at passive oxide covered polycrystalline Co electrodes in aqueous alkaline solution. Kinetic studies on electrodes subjected to different pre-treatment routines, yielded different values of the Tafel slope and the reaction order with respect to OH activity. Only one mechanistic pathway could account ...

The Oxygen Evolution Reaction on Passive Oxide Covered Transition Metal Electrodes in Alkaline Solution. Part III – Iron

The kinetics of the oxygen evolution reaction (OER) at passive oxide covered polycrystalline Fe electrodes in aqueous alkaline solution were examined using both dc steady state polarisation and ac impedance techniques. It proved difficult to obtain reproducible polarisation data for bright anodes, and so an electrochemical pre-treatment routine was devised. Upon ageing of a given electrode spec...

Evolution Reaction in Aqueous Alkaline Solution Hydrous Nickel Oxide: Redox Switching and the Oxygen