Abstract: An electrode for electrolytic processes, in particular to an anode suitable for oxygen evolution having a valve metal substrate, a catalytic layer, a protection layer consisting of oxides of valve metals interposed between the substrate and the catalytic layer and an outer coating of oxides of valve metals. The electrode is particularly suitable for processes of cathodic electrodeposition of chromium from an aqueous solution containing Cr (III).

Abstract: A chlorination electrolyser having a housing provided with an inlet and an outlet suitable for the circulation of brine; at least one pair of bipolar electrodes facing each other and positioned within said housing. Each bipolar electrode of the at least one pair has a valve metal substrate; an active coating comprising at least one layer of a catalytic composition comprising ruthenium and titanium disposed over the substrate; a top coating having at least one layer composed of oxides of tantalum, niobium, tin, or combinations thereof disposed over the active coating. A self-cleaning electrochlorination system having the an electrolyser, a method for its production, its use in normal and low salinity pools for hypochlorite mediated water disinfection and a method for hypochlorite-mediated water disinfection.

Abstract: The present invention relates to an electrode for electrochlorination processes, optionally operable under polarity reversal conditions, comprising an active layer provided with a doped Ru—Ti catalytic composition.

Abstract: An electrode for electrolytic processes, in particular to an anode suitable for oxygen evolution having a valve metal substrate, a catalytic layer, a protection layer consisting of oxides of valve metals interposed between the substrate and the catalytic layer and an outer coating of oxides of valve metals. The electrode is particularly suitable for processes of cathodic electrodeposition of chromium from an aqueous solution containing Cr (III).

Abstract: The invention relates to an electrode for electrolytic processes, in particular to an anode suitable for oxygen evolution comprising a valve metal substrate, a catalytic layer, a protection layer consisting of oxides of valve metals interposed between the substrate and the catalytic layer and an outer coating of oxides of valve metals. The electrode of the invention is particularly suitable for processes of cathodic electrodeposition of chromium from an aqueous solution containing Cr (III).

Abstract: An electrode for electrochemical processes comprises a substrate of titanium or other valve metal, an intermediate protection layer based on valve metal oxides and a catalytic layer based on oxides of tin and of iridium doped with small amounts of oxides of elements selected between bismuth, antimony, tantalum and niobium. The electrode used in electrometallurgical processes, for example in the electrowinning of metals, as anode for anodic oxygen evolution presents a reduced overvoltage and a higher duration.

Abstract: The present invention relates to an electrode for electrochlorination processes, optionally operable under polarity reversal conditions, comprising an active layer provided with a doped Ru—Ti catalytic composition.

Abstract: The present invention relates to an electrode for electrochlorination processes, optionally operable under polarity reversal conditions, comprising an active layer provided with a doped Ru—Ti catalytic composition.

Abstract: An electrode on valve metal substrate suitable for the evolution of oxygen in electrolytic processes is provided with a coating having a catalytic layer containing platinum group metals and one or more protective layers based on tin oxide modified with a doping element selected from bismuth, antimony or tantalum and with a small amount of ruthenium. The electrode is useful in processes of non-ferrous metal electrowinning.

Abstract: An electrode on valve metal substrate suitable for the evolution of oxygen in electrolytic processes is provided with a coating having a catalytic layer containing platinum group metals and one or more protective layers based on tin oxide modified with a doping element selected from bismuth, antimony or tantalum and with a small amount of ruthenium. The electrode is useful in processes of non-ferrous metal electrowinning.

Abstract: The invention relates to an electrode for electrolytic processes, in particular to an anode suitable for oxygen evolution comprising a valve metal substrate, a catalytic layer, a protection layer consisting of oxides of valve metals interposed between the substrate and the catalytic layer and an outer coating of oxides of valve metals. The electrode of the invention is particularly suitable for processes of cathodic electrodeposition of chromium from an aqueous solution containing Cr (III).

Abstract: An electrode for electrochemical processes comprises a substrate of titanium or other valve metal, an intermediate protection layer based on valve metal oxides and a catalytic layer based on oxides of tin and of iridium doped with small amounts of oxides of elements selected between bismuth, antimony, tantalum and niobium. The electrode used in electrometallurgical processes, for example in the electrowinning of metals, as anode for anodic oxygen evolution presents a reduced overvoltage and a higher duration.

Abstract: The invention relates to a coating for anodes suitable for oxygen evolution in electrochemical processes, comprising one or more catalytic layers and an external layer. Such external layer having a composition based on tantalum oxides or tin oxides or zirconium oxides in an amount of 2 to 7 g/m2.