Oxygen-consuming electrode and method for producing same
AssigneeCovestro Deutschland AG
InventorsAndreas Bulan, Jürgen Kintrup
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Abstract
The invention relates to an oxygen-consuming electrode, in particular for use in chloralkali electrolysis, comprising a novel catalyst coating based on carbon nanotubes and a silver-based cocatalyst, and to an electrolysis device. The invention further relates to a method for producing said oxygen-consuming electrode and to the use thereof in chloralkali electrolysis or fuel cell technology.
Claims18
A gas diffusion electrode for the reduction of oxygen, where the gas diffusion electrode has at least one sheet-like, electrically conductive support, and a gas diffusion layer and an electrocatalyst applied to the support,
- wherein the gas diffusion layer consists of at least a mixture of carbon nanotubes and a fluoropolymer,
- wherein the carbon nanotubes and the fluoropolymer are dry mixed together with a silver-containing cocatalyst in powder form and then applied to the support and compacted with an application of a pressing force on the support and,
- wherein the carbon nanotubes act as the electrocatalyst,
- wherein from 1 to 55% by weight of the silver-containing cocatalyst, based on the total content of the electrocatalyst, the silver-containing cocatalyst, and the fluoropolymer, is present as a further electrocatalyst.
Dependencies are inferred from the claim text.