Nanocrystalline iridium series oxide coating electrode preparation method

A technology of oxide coating and nanocrystals, which is applied in the field of electrochemical applications, can solve the problems of high oxygen evolution potential and short life, and achieve the effects of simple preparation, long life and low cost

Inactive Publication Date: 2007-07-11
UNIV OF SCI & TECH BEIJING
View PDF5 Cites 36 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this electrode has the disadvantages of high oxygen evolution potential and short life in the oxygen evolution reaction and acidic environment.
For the iridium-based coated anode, it can meet various working environments, and the electrocatalysis is better than that of the ruthenium-based coated anode, but the stability needs to be further improved.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1. prepares IrO 2 -Ta 2 o 5 -SnO 2 Electrode: Cut the pure titanium plate without sandblasting and sandblasting into 20×25mm size, and then carry out alkali cleaning and pickling. Extract TaCl 5 -C 2 h 5 1.855ml of OH solution (Ta180g / L) and 3.48ml of chloroiridic acid (Ir119g / L) were placed in a weighing bottle and mixed evenly, then put in an oven and baked at 90°C for 10 hours until the mixture became a fine powder. Solvent was added to make the solution clear. Weigh tin protochloride (SnCl 2 2H 2 O), making SnO 2 The amount of substance accounted for by IrO 2 -Ta 2 o 5 -SnO 2 The amount of the total substance is 5-15%, and it is mixed with IrO 2 -Ta 2 o 5 solution mixed to prepare IrO 2 -Ta 2 o 5 -SnO 2 Coating solution. Use a soft plush pen to brush the coating solution on both sides of the titanium plate, dry it in an oven at 90°C for 5 minutes, then sinter it in a muffle furnace at 370°C for 5 minutes, take it out and air cool to r...

Embodiment 2

[0023] Embodiment 2. prepare IrO 2 -Ta 2 o 5 -SiO 2 Electrode: The pretreatment method of the titanium plate is the same as that of Example 1. Formulated IrO 2 -Ta 2 o 5 The solution was the same as in Example 1. Adding 0.227ml concentration is 25.5% acidic silica sol solution in it, makes SiO 2 7% by weight in it, made of IrO 2 -Ta 2 o 5 -SiO 2 Coating solution. Brush the coating solution on both sides of the titanium plate with a soft plush pen, dry it in an oven at 90°C for 5 minutes, then sinter it in a muffle furnace at 350°C for 5 minutes, take it out and air cool to room temperature, repeat the above steps until coating 3 floors. Then, it was still dried in an oven at 90°C for 5 minutes, but sintered in a muffle furnace at 350°C for 10 minutes, and so on until 10 layers were applied. Prepare the required nanocrystalline electrode, and use the Scherrer formula to calculate the IrO of the electrode coating through the X-ray diffraction analysis spectrum. 2 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a making method of nanocrystalline iridium-series oxide coating electrode in the electrochemical appliance technical domain, which comprises the following steps: predisposing base; proceeding mechanic disposal; deoiling through alkaline and acid; allocating the coating liquid; coating. The solution of IrO2-Ta2O5-MO2 coating is composed of 30-95% H2IrCl6 solution and TaCl5 solution with the molar rate of Ir and Ta at 7: 6 and 5-70% third element M chloride with Sn, Mn, Ti, Nb, Pb and Si, wherein the even size of IrO2 grain is 8-15nm, which stabilizes the electrode.

Description

technical field [0001] The invention belongs to the field of electrochemical application technology, and in particular relates to a method for preparing a nanocrystalline iridium oxide coating electrode, which improves the stability of the electrode by refining the crystal particle size of the coating to the nanometer level. Background technique [0002] Electrodes are central components in electrochemical applications. The development of electrode materials has generally gone through three stages: 1) Graphite electrode stage, brine electrolysis is the earliest aqueous solution electrolysis industry, mainly used natural carbon electrodes, natural graphite electrodes and platinum electrodes in the early days. This type of electrode is corrosion-resistant and cheap, and has been used for a long time, but there are problems of poor electrolysis efficiency and electrode instability during production; 2) In the electrode stage of platinum group metals and lead alloys, although th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/08
Inventor 孟惠民孙冬柏俞宏英樊自栓王旭东
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap