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Coating composition of shape-stable electrode, shape-stable electrode, preparation method and application

A coating composition and electrode technology, which is applied in the field of electrochemical catalysis, can solve the problems of affecting the catalytic effect, current efficiency and electrode life, weakening the precipitation of clustered crystal grains, and uneven catalyst coating, so as to achieve easy scale-up preparation , the effect of inhibiting excessive growth and inhibiting crack growth

Active Publication Date: 2021-05-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such as: adding Sn element to modify Ti / IrO 2 -RuO 2 , change the distribution of cracks on the electrode surface, greatly improving the flatness of the electrode; weakening the precipitation of clustered grains, improving the resistance to Cl - However, there is still the problem of mixed metal salt shedding due to solvent volatilization in the electrocatalyst coating step, resulting in waste of precious metals and uneven catalyst coating, which seriously affects the catalytic effect, current efficiency and Electrode life

Method used

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  • Coating composition of shape-stable electrode, shape-stable electrode, preparation method and application
  • Coating composition of shape-stable electrode, shape-stable electrode, preparation method and application
  • Coating composition of shape-stable electrode, shape-stable electrode, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Polish the metal titanium sheet with 800-grit sandpaper, and then polish it with 2000-grit sandpaper; rinse it with ultra-pure water, soak it in acetone to degrease; rinse it with acetone for 2 to 3 times, and dry it; after that, put the metal titanium sheet Soak in 3% oxalic acid solution at 90°C for 2 hours, then rinse with water for later use. 20ml of Ti(O-t-C 3 h 7 ) 4 Dissolve it in 40mL of ethanol, and add concentrated hydrochloric acid dropwise to pH 4 under stirring; then add water dropwise until the mixed solution becomes a jelly-like gel. According to the molar ratio Ir / Ru / Ti=x / (3-x) / 7(x=0), the total concentration of the three elements (Ir+Ru+Ti) is 0.3mol / L and weigh TiO 2 Gel, RuCl 3 and H 2 IrCl 6 hydrochloric acid solution and add an appropriate amount of pure water to dissolve to obtain a mixed metal salt precursor solution (referred to as solution A1). Configure 0.05mol / L citric acid solution, according to the molar ratio of (Ir+Ru+Ti) and COOH 1...

Embodiment 2

[0055] Polish the metal titanium sheet with 800-grit sandpaper, and then polish it with 2000-grit sandpaper; rinse it with ultra-pure water, soak it in acetone to degrease; rinse it with acetone for 2 to 3 times, and dry it; after that, put the metal titanium sheet Soak in 3% oxalic acid solution at 90°C for 1 hour, then rinse with water for later use. 20ml of Ti(O-n-C 4 h 9 ) 4 Dissolve it in 40mL of ethanol, and add concentrated hydrochloric acid dropwise to pH 5 under stirring; then add water dropwise until the mixed solution becomes a jelly-like gel. According to the molar ratio Ir / Ru / Ti=x / (3-x) / 7(x=1.8), the total concentration of the three elements (Ir+Ru+Ti) is 0.5mol / L and weigh TiO 2 Gel, RuCl 3 and H 2 IrCl 6 hydrochloric acid solution and add an appropriate amount of pure water to dissolve to obtain a mixed metal salt precursor solution (referred to as solution A2). Configure a 0.1mol / L malonic acid solution, measure a sufficient amount of malonic acid soluti...

Embodiment 3

[0057] Polish the metal titanium sheet with 800-grit sandpaper, and then polish it with 2000-grit sandpaper; rinse it with ultra-pure water, soak it in acetone to degrease; rinse it with acetone for 2 to 3 times, and dry it; after that, put the metal titanium sheet Soak in 3% oxalic acid solution at 90°C for 2 hours, then rinse with water for later use. 20ml of Ti(O-n-C 4 h 9 ) 4 Dissolve it in 40mL of ethanol, and add concentrated hydrochloric acid dropwise to pH 4 under stirring; then add water dropwise until the mixed solution becomes a jelly-like gel. According to the molar ratio Ir / Ru / Ti=x / (3-x) / 7(x=1.5), the total concentration of the three elements (Ir+Ru+Ti) is 0.42mol / L, respectively weigh TiO 2 Gel, RuCl 3 and H 2 IrCl 6 hydrochloric acid solution and add an appropriate amount of pure water to dissolve to obtain a mixed metal salt precursor solution (referred to as solution A3). Configure 0.16mol / L citric acid solution, measure a sufficient amount of citric ac...

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Abstract

A coating composition for a shape-stable electrode, a shape-stable electrode, a preparation method, and applications, wherein the coating composition for a shape-stable electrode includes a precursor solution of a catalytically active component, and an additive; the catalytically active component The precursor solution is a solution containing one or more elements in Ti, Ru, Ir, and the additive is a mixed solution including polycarboxylic acid and polyhydric alcohol; the ratio of polycarboxylic acid and polyhydric alcohol in the additive is according to the carboxyl / hydroxyl molar ratio is 1: 1 ~ 3: 1; and the ratio of the total moles of Ru, Ir, Ti three metal elements in the precursor solution of the catalytic active component to the molar ratio of polycarboxylic acid is 1: 1 ~ 3: 1. Using the invention to increase the wettability and bonding force between the paint and the metal matrix can effectively regulate the active surface area of ​​the electrode, increase the uniform dispersion of the catalytic active components of the electrode, and improve the operation stability of the electrode.

Description

technical field [0001] The invention relates to the application field of electrochemical catalysis, in particular to a coating composition of a shape-stable electrode, a shape-stable electrode, a preparation method and an application. Background technique [0002] Hypochlorous acid or hypochlorite disinfectant is the most commonly used and most effective disinfectant in sewage treatment, food industry and environmental protection. Compared with chlorine disinfection methods such as solid chlorine-containing disinfectants (such as bleaching powder, bleaching powder essence, trichloroisocyanuric acid, etc.), chlorine dioxide disinfection powder, potassium monopersulfate disinfection powder, liquid chlorine, and chlorine dioxide, hypochlorite Acid or sodium hypochlorite disinfection technology is more broad-spectrum, safe, and efficient; and the raw material salt (NaCl) is easy to obtain, and it is convenient to purchase, transport, and store. The ion exchange membrane electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/052C25B11/063C25B11/097C25B1/26C25B1/14
CPCB01J21/063B01J23/462B01J23/468C25B1/265C25B11/051C25B11/057C25B11/093
Inventor 武晓峰陈运法
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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