Electrode for electrolysis cell

一种电解槽、电极的技术，应用在电极领域，能够解决电极活性经济意义不理想等问题

Active Publication Date: 2011-10-05
IND DE NORA SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The activity of this electrode still does not make economic sense for large-scale industrial production in terms of cell voltage and thus energy loss

Method used

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  • Electrode for electrolysis cell

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The titanium mesh body with a size of 10 cm×10 cm was sandblasted with corundum, and the treated residue was cleaned by a compressed air jet. The pellets were then degreased using acetone in an ultrasonic bath for about 10 minutes. After the drying step, the flakes were heated at about 100°C in an atmosphere containing 250 g / l of NaOH and 50 g / l of KNO 3 Soak in aqueous solution for 1 hour. After the alkali treatment, the wafers were rinsed three times at 60° C. with deionized water, changing the liquid each time. A final rinse step was performed, adding a small amount of HCl (about 1 ml / l solution). to air dry, since the TiO x The formation of a brown tint was observed as the film grew.

[0022] 100 ml of a 1.3 M hydroalcoholic solution of a Ti-based precursor suitable for the deposition of a protective layer with a molar composition of 98% Ti, 1% Bi, 1% Nb was then prepared using the following components:

[0023] The 2M Ti hydroxyacetyl chloride complex solution...

Embodiment 2

[0041] The titanium mesh body with a size of 10 cm×10 cm was sandblasted with corundum, and the treated residue was cleaned by a compressed air jet. The pellets were then degreased using acetone in an ultrasonic bath for about 10 minutes. After the drying step, the flakes were heated at about 100°C in an atmosphere containing 250 g / l of NaOH and 50 g / l of KNO 3 Soak in aqueous solution for 1 hour. After the alkali treatment, the wafers were rinsed three times at 60° C. with deionized water, changing the liquid each time. A final rinse step was performed, adding a small amount of HCl (about 1 ml / l solution). to air dry, since the TiO x The formation of a brown tint was observed as the film grew.

[0042] 100 ml of a 1.3 M hydroalcoholic solution of a Ti-based precursor suitable for the deposition of a protective layer with a molar composition of 98% Ti, 2% Ta was then prepared using the following components:

[0043] The 2M Ti hydroxyacetyl chloride complex solution of 65m...

Embodiment 3

[0057] Starting from the above-mentioned pretreated titanium mesh sheets with dimensions of 10 cm x 10 cm, a series of samples labeled A02-A11 were prepared using the reagents and method as in Example 1, said sheets having a molar composition of 98% A protective layer of Ti, 1% Bi, 1% Nb, and a catalytic layer with the compositions reported in Table 1 and specific noble metal loadings.

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Abstract

The invention relates to an electrode formulation comprising a catalytic layer containing tin, ruthenium, iridium, palladium and niobium oxides applied to a titanium or other valve metal substrate. A protective layer based on titanium oxide modified with oxides of other elements such as tantalum, niobium or bismuth may be interposed between the substrate and the catalytic layer. The thus obtained electrode is suitable for use as anode in electrolysis cells for chlorine production.

Description

technical field [0001] The invention relates to an electrode suitable for use as an anode in an electrolytic cell, for example as an anode for chlorine evolution in a chlor-alkali electrolytic cell. Background technique [0002] The electrolysis of chlor-alkali brines, such as sodium chloride brines for chlorine and caustic soda production, often uses ruthenium dioxide (RuO 2 ) surface activated titanium or other valve metal (valve metal) based anodes, the ruthenium dioxide (RuO 2 ) has the performance of reducing the overvoltage of the anodic chlorine analysis reaction. A typical formulation of a catalyst for chlorine evolution consists of, for example, RuO 2 and TiO 2 The composition of the mixture has a sufficiently reduced anodic chlorine evolution overvoltage. In addition to the need to adopt very high ruthenium loadings to obtain a satisfactory lifetime under normal process conditions, these formulations also have the disadvantage of a similar reduced overvoltage o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B1/46C25B9/19
CPCC25B11/0426C25B1/46C25B11/0484C25B11/069C25B11/093C25B15/08
Inventor C·厄戈赫A·莫罗佐夫A·卡尔德拉拉D·F·迪弗兰克A·L·安托兹
Owner IND DE NORA SPA
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