ELECTRODE FOR GAS EVOLUTION IN ELECTROLYTIC PROCESSES

The present invention concerns an electrode for gas evolution in electrolytic processes and a method for the production of such an electrode, the electrode comprising a metal substrate and a coating formed on said substrate, wherein said coating comprises at least a highly porous catalytic outer lay...

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Bibliographische Detailangaben
Hauptverfasser:	MARINA, Riccardo, PINO, Francesco, MATIENZO, DJ Donn, INSTULI, Emanuele, DI BARI, Chiara
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention concerns an electrode for gas evolution in electrolytic processes and a method for the production of such an electrode, the electrode comprising a metal substrate and a coating formed on said substrate, wherein said coating comprises at least a highly porous catalytic outer layer containing nickel oxide and nickel hydroxide, said porous outer layer having a surface area of at least 40 m2/g (BET). The catalytic layer is prepared from a Ni oxide/V oxide initial coating with subsequent leaching of V. La présente invention concerne une électrode pour dégagement de gaz dans des procédés électrolytiques et un procédé de production d'une telle électrode, l'électrode comprenant un substrat métallique et un revêtement formé sur ledit substrat, ledit revêtement comprenant au moins une couche externe catalytique hautement poreuse contenant de l'oxyde de nickel et de l'hydroxyde de nickel, ladite couche externe poreuse possédant une surface d'au moins 40 m2/g (BET). La couche catalytique est préparée à partir d'un revêtement initial d'oxyde de Ni/oxyde de V avec lixiviation ultérieure du V.