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Titanium-based oxide acid resistant anode and preparation method thereof

A titanium-based oxide and anode technology, which is applied in the field of electrochemical engineering, can solve the problems of reduced electrical conductivity, poor bonding between the titanium substrate and the surface active layer, and the peeling off of the surface active layer.

Inactive Publication Date: 2011-12-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this type of anode is that during the electrolysis process, the oxygen released from the anode will passivate the titanium, resulting in an increase in electrode resistance and electrode failure.
Reported Ti / MO 2 In research, mostly Ti / MnO 2 and Ti / PbO 2 Anode, but there are obvious problems, mainly: (1) The formation of titanium dioxide insulating layer on the surface of titanium substrate reduces the conductivity
(2) The bonding force between the titanium substrate and the surface active layer is poor, causing the surface active layer to fall off, especially in highly corrosive acidic solutions
However, it is still not suitable for electrolytic production with oxygen evolution and organic electrolysis.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] First, use No. 360, No. 600, and No. 1000 sandpaper to polish the titanium foil with a length of 70 mm, a width of 10 mm, and a thickness of 1 mm until there is no scratch on the surface, then ultrasonically clean it with acetone and absolute ethanol, and then wash it with distilled water and dry it. 3 Mixed solution (HF, HNO 3 、H 2 The volume ratio of O is 1:4:5) chemically polished, washed with distilled water, and dried with cold air for subsequent use;

[0030] In the plexiglass electrolytic cell device, the above-mentioned pretreated titanium foil is used as the anode, the platinum sheet is used as the cathode, and the distance between the two electrodes is 2 to 4 cm, and 80 mL of 1-butyl-3-methylimidazolium tetrafluoroborate solution is Electrolyte, control voltage 5V for anodic oxidation of titanium substrate, electrolysis time 1h, form TiO 2 nanotube. Ultrasonic cleaning with distilled water and air drying. The heat treatment was carried out in the studied a...

Embodiment approach 2

[0036] First, use No. 360, No. 600, and No. 1000 sandpaper to polish the titanium foil with a length of 70 mm, a width of 10 mm, and a thickness of 1 mm until there is no scratch on the surface, then ultrasonically clean it with acetone and absolute ethanol, and then wash it with distilled water and dry it. 3 Mixed solution (HF, HNO 3 、H 2 The volume ratio of O is 1:4:5) chemically polished, washed with distilled water, and dried with cold air for subsequent use;

[0037] In the plexiglass electrolytic cell device, the above-mentioned pretreated titanium foil is used as the anode, the platinum sheet is used as the cathode, the distance between the two electrodes is 2 to 4 cm, and 80 mL of 1-hexyl-3-methylimidazolium tetrafluoroborate solution is used as the electrolytic Liquid, control voltage 5V to carry out anodic oxidation of titanium substrate, electrolysis time 1h, form TiO 2 nanotube. Ultrasonic cleaning with distilled water and air drying. The heat treatment was car...

Embodiment approach 3

[0042] First, use No. 360, No. 600, and No. 1000 sandpaper to polish the titanium foil with a length of 70 mm, a width of 10 mm, and a thickness of 1 mm until there is no scratch on the surface, then ultrasonically clean it with acetone and absolute ethanol, and then wash it with distilled water and dry it. 3 Mixed solution (HF, HNO 3 、H 2 The volume ratio of O is 1:4:5) chemically polished, washed with distilled water, and dried with cold air for subsequent use;

[0043] Put the titanium matrix cathode and the graphite source into the vacuum chamber of the double-layer glow ionization metallization furnace, and the Ce or Y rare earth infiltrator and BCl 3 Place it on the surface of the cathode, and use a vacuum machine to evacuate to 5×10 -3 Pa, a mixture of argon and nitrogen (5:5) was introduced to make the partial pressure reach 50Pa, the bias voltage of the titanium substrate was controlled to 600V, the temperature of the titanium substrate was 820°C, and the source vol...

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Abstract

The invention provides a titanium-based oxide acid resistant anode and a preparation method thereof, and specifically to an electrode catalyst used in the process of electrolysis and a preparation method thereof, belonging to the technical field of electrochemical engineering. The invention is characterized in that: the titanium-based oxide acid resistant anode is especially applicable to electrolysis with oxygen evolution and organic electrolysis and has a long life in a sulfuric acid solution; the anode comprises an electrode matrix, an intermediate transition layer and an active coating; the preparation method for the anode comprises the steps of preparing Ti / Tio2NT by electrochemical anodization in ionic liquid and forming Ti / TiO2NT / C+N+B by co-cementation of B, C and N under the catalytic cementation of rare earth at first or preparing Ti / C+N+B through surface alloying of titanium matrix and forming Ti / C+N+B / TiO2NT through anodization heat treatment at first, applying the graphite fiber loaded intermediate transition layer of Sn, Sb, rare earth and like next, and preparing the PbO2 or MnO2 active coating at last. The titanium-based oxide acid resistant anode prepared through the preparation method provided in the invention has a service life more than 160 hours.

Description

technical field [0001] The invention discloses a titanium-based oxide acid-resistant anode and a preparation method thereof, belonging to the technical field of electrochemical engineering, and specifically relates to an electrode catalyst used in an electrolysis process and a preparation method thereof. Background technique [0002] Titanium-based oxide electrodes have the advantages of good electrocatalytic performance, corrosion resistance, long life, and low cost, and are widely used in acidic solutions. The main disadvantage of this type of anode is that during the electrolysis process, the oxygen released from the anode will passivate the titanium, which will lead to an increase in electrode resistance and electrode failure. Reported Ti / MO 2 In research, mostly Ti / MnO 2 and Ti / PbO 2 Anode, but there are obvious problems, mainly: (1) The formation of a titanium dioxide insulating layer on the surface of the titanium substrate reduces the conductivity. (2) The bindin...

Claims

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Application Information

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IPC IPC(8): C25B11/10C25D11/26C23C8/36
Inventor 梁镇海韩玲军马旭莉杨慧敏樊彩梅郝晓刚
Owner TAIYUAN UNIV OF TECH
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