Catalyst for electrochemical reduction of oxygen

Details Catalyst for electrochemical reduction of oxygen Catalyst for electrochemical reduction of oxygen

C - Chemistry, Metallurgy

25

B

C25B 11/04 (2006.01) B01J 27/045 (2006.01)

Patent

CA 2673754

The invention relates to a sulphide catalyst for electrochemical reduction of oxygen particularly stable in chemically aggressive environments such as chlorinated hydrochloric acid. The catalyst of the invention comprises a noble metal sulphide single crystalline phase supported on a conductive carbon essentially free of zerovalent metal and of metal oxide phases, obtainable by reduction of metal precursor salts and thio-precursors with a borohydride or other strong reducing agent.

L'invention concerne un catalyseur sulfure destiné à la réduction électrochimique de l'oxygène, qui est particulièrement stable dans des environnements chimiquement agressifs tels que l'acide hydrochlorique chloré. Le catalyseur de l'invention comprend une phase monocristalline de sulfure de métal noble portée par un carbone conducteur essentiellement dépourvu de phases de métaux à valence zéro et d'oxydes métalliques, que l'on obtient par réduction de sels précurseurs métalliques et de thio-précurseurs avec un borohydrure ou un autre agent réducteur fort.

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