Hydrogen-evolution electrode having high durability and stability
First Claim
1. A hydrogen-evolution electrode comprising an electrically conductive substrate having thereon a coating comprising a titanium component, a zirconium component and an oxide of at least one metal selected from the group consisting of nickel and cobalt, said titanium component and zirconium component being present in proportions of 0.1 to 3.5% in terms of atomic percentage of titanium and 0.1 to 3% in terms of atomic percentage of zirconium, respectively,said atomic percentage of titanium being defined by the formula:
- ##EQU4## wherein ATi represents the number of titanium atoms in the coating and AT represents the total number of atoms of titanium, zirconium and said at least one metal in the coating,said atomic percentage of zirconium being defined by the formula;
##EQU5## wherein AZr represents the number of zirconium atoms in the coating and AT is as defined above.
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Accused Products
Abstract
A highly durable, stable electrode having a coating comprised of an oxide of at least one metal selected from nickel and cobalt, which coating additionally contains titanium and zirconium components in proportions of 0.1. to 3.5% in terms of atomic percentage of titanium and 0.1 to 3% in terms of atomic percentage of zirconium, respectively. The electrode can advantageously be used in electrolyses in which hydrogen is evolved on the electrode, such as electrolyses of an alkali metal chloride and water. The electrode advantageously exhibits a low hydrogen overvoltage, enabling electrolysis to be performed stably for a prolonged period of time.
20 Citations
4 Claims
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1. A hydrogen-evolution electrode comprising an electrically conductive substrate having thereon a coating comprising a titanium component, a zirconium component and an oxide of at least one metal selected from the group consisting of nickel and cobalt, said titanium component and zirconium component being present in proportions of 0.1 to 3.5% in terms of atomic percentage of titanium and 0.1 to 3% in terms of atomic percentage of zirconium, respectively,
said atomic percentage of titanium being defined by the formula: - ##EQU4## wherein ATi represents the number of titanium atoms in the coating and AT represents the total number of atoms of titanium, zirconium and said at least one metal in the coating,
said atomic percentage of zirconium being defined by the formula;
##EQU5## wherein AZr represents the number of zirconium atoms in the coating and AT is as defined above. - View Dependent Claims (2, 3, 4)
- ##EQU4## wherein ATi represents the number of titanium atoms in the coating and AT represents the total number of atoms of titanium, zirconium and said at least one metal in the coating,
Specification