This paper presents a review of the redox and electrocatalytic properties of transition metal oxide electrodes, paying particular attention to the oxygen evolution reaction. Metal oxide materials may be prepared using a variety of methods, resulting in a diverse range of redox and electrocatalytic properties. Here we describe the most common synthetic routes and the important factors relevant to their preparation. The redox and electrocatalytic properties of the resulting oxide layers are ascribed to the presence of extended networks of hydrated surface bound oxymetal complexes termed surfaquo groups. This interpretation presents a possible unifying concept in water oxidation catalysis – bridging the fields of heterogeneous electrocatalysis and homogeneous molecular catalysis.

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Redox and electrochemical water splitting catalytic properties of hydrated metal oxide modified electrodes

A comparative study of the oxygen evolution reaction on oxidised nickel, cobalt and iron electrodes in base

The kinetics and mechanism of the oxygen evolution reaction at a series of RuO2/IrO2 mixed oxides in aqueous acid and alkaline solution has been examined using a variety of electrochemical methods. Factors affecting the electrocatalytic activity have been elucidated and novel oxygen evolution mechanisms in terms of reactive oxyruthenium and oxyiridium surface groups are proposed.

Mechanism of oxygen reactions at porous oxide electrodes. Part 2—Oxygen evolution at RuO2, IrO2 and IrxRu1−xO2 electrodes in aqueous acid and alkaline solution

In situ studies of the oxidation of nickel electrodes in alkaline solution

pH dependence of OER activity of oxides: Current and future perspectives

Voltammetric behaviour of nickel in base with particular reference to thick oxide growth

Influence of ph on the redox behaviour of hydrous nickel oxide

Influence of the acid/base character of the surface on the electrocatalytic behaviour of both nickel and nickel oxide anodes, with particular reference to oxygen gas evolution

Evidence for the formation of a cationic surface layer on silver, copper and gold under potential cycling conditions: a possible interpretation of the electro-magnetic field effect involved in sers phenomena

T.A.M. Twomey

Papers

Voltammetric behaviour of nickel in base with particular reference to thick oxide growth

Influence of ph on the redox behaviour of hydrous nickel oxide

Influence of the acid/base character of the surface on the electrocatalytic behaviour of both nickel and nickel oxide anodes, with particular reference to oxygen gas evolution

Evidence for the formation of a cationic surface layer on silver, copper and gold under potential cycling conditions: a possible interpretation of the electro-magnetic field effect involved in sers phenomena