Publication

Recent developments in base metal - catalytic coated electrodes

Christos Comninellis
1988
Journal Articles

Abstract

Electrodes of the type base metal (Ti, Zr, and Ta)-catalytic coating (RuO2, IrO2, PtO2, TiO2, ZrO2, and Ta2O5) for O evolution in acidic solns. were prepd. and characterized. The electrodes were tested in 30% H2SO4 solns. at 80 Deg. The susceptibility to thermal oxidn. was in the order Nb > Ta > Zr > Ti and to anodic oxidn. was the order Nb > Zr > Ti > Ta. [on SciFinder (R)]

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Christos Comninellis
1988
Journal Articles

Abstract

Official source

Related concepts (32)

Metal

A metal (from Ancient Greek μέταλλον métallon 'mine, quarry, metal') is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets). These properties are the result of the metallic bond between the atoms or molecules of the metal. A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride.

Base metal

A base metal is a common and inexpensive metal, as opposed to a precious metal such as gold or silver. In numismatics, coins often derived their value from the precious metal content; however, base metals have also been used in coins in the past and today. In contrast to noble metals, base metals may be distinguished by oxidizing or corroding relatively easily and reacting variably with diluted hydrochloric acid (HCl) to form hydrogen. Examples include iron, nickel, lead and zinc.

Tantalum pentoxide

Tantalum pentoxide, also known as tantalum(V) oxide, is the inorganic compound with the formula Ta2O5. It is a white solid that is insoluble in all solvents but is attacked by strong bases and hydrofluoric acid. Ta2O5 is an inert material with a high refractive index and low absorption (i.e. colourless), which makes it useful for coatings. It is also extensively used in the production of capacitors, due to its high dielectric constant.

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Recent developments in base metal - catalytic coated electrodes

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