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Titanium-based iridium oxide electrode and electrochemical preparation method and application thereof

A titanium-based iridium oxide and iridium oxide technology, applied in the field of materials, can solve the problems of hindering the contact and mass transfer between Ti and the electrolyte solution, hindering the exposure of active sites on the electrode surface, affecting the OER activity and stability of the electrode, etc. No strength, small thermal expansion coefficient, tight bonding effect

Active Publication Date: 2021-06-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the disadvantage is that it is often necessary to add a certain amount of surfactant or binder during the process of gel coating on the surface of the substrate, which will inevitably hinder the exposure of the active sites on the electrode surface to a certain extent, and hinder the contact between Ti and the electrolyte solution. and mass transfer, resulting in additional contact resistance, which affects the OER activity and stability of the electrode

Method used

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  • Titanium-based iridium oxide electrode and electrochemical preparation method and application thereof
  • Titanium-based iridium oxide electrode and electrochemical preparation method and application thereof
  • Titanium-based iridium oxide electrode and electrochemical preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] according to figure 1 The flow chart of the method shown proceeds to the preparation of titanium-based iridium oxide electrodes.

[0037] IrCl 3 Soluble in oxalic acid, IrCl 3 The molar ratio of iridium and hydrogen ions in oxalic acid is 1:10, and then the pH value is adjusted to 10.0 with potassium carbonate to obtain an electrolyte; after aging and hydrolysis of the obtained electrolyte for 10 hours, use Ti metal as the anode, and use cyclic voltammetry The titanium-based iridium oxide electrode was obtained after 1 hour of electrolytic deposition of the electrolyte solution. The counter electrode is a graphite electrode, and the reference electrode is a saturated calomel electrode. The voltage scanning range of cyclic voltammetry is -0.85-1.0V (relative to the saturated calomel electrode), the scanning rate is 50mV / s, and the number of scanning cycles is 50r.

Embodiment 2

[0051] according to figure 1 The flow chart of the method shown proceeds to the preparation of titanium-based iridium oxide electrodes.

[0052] will IrCl 3 Soluble in oxalic acid, IrCl 3 The molar ratio of the iridium in the oxalic acid to the hydrogen ion in the oxalic acid is 1:10, and then the pH value is adjusted to 10.0 with potassium carbonate to obtain an electrolyte; after aging and hydrolysis of the obtained electrolyte for 70 hours, use Ti metal as the anode, and use cyclic voltammetry The titanium-based iridium oxide electrode was obtained after 1 hour of electrolytic deposition of the electrolyte solution. The counter electrode is a graphite electrode, and the reference electrode is a saturated calomel electrode. The voltage scanning range of cyclic voltammetry is -0.85-1.0V (relative to the saturated calomel electrode), the scanning rate is 50mV / s, and the number of scanning cycles is 50r.

[0053] The titanium-based iridium oxide electrode that embodiment 2 ...

Embodiment 3

[0055] according to figure 1 The flow chart of the method shown proceeds to the preparation of titanium-based iridium oxide electrodes.

[0056] will IrCl 3 Soluble in oxalic acid, IrCl 3 The molar ratio of the iridium in the oxalic acid to the hydrogen ion in the oxalic acid is 1:10, and then the pH value is adjusted to 10.0 with potassium carbonate to obtain an electrolyte; after aging and hydrolysis of the obtained electrolyte for 140 hours, use Ti metal as the anode, and use cyclic voltammetry The titanium-based iridium oxide electrode was obtained after 1 hour of electrolytic deposition of the electrolyte solution. The counter electrode is a graphite electrode, and the reference electrode is a saturated calomel electrode. The voltage scanning range of cyclic voltammetry is -0.85-1.0V (relative to the saturated calomel electrode), the scanning rate is 50mV / s, and the number of scanning cycles is 50r.

[0057] The titanium-based iridium oxide electrode that embodiment 3...

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Abstract

The invention discloses a titanium-based iridium oxide electrode. A substrate of the titanium-based iridium oxide electrode is titanium metal, and a surface layer of the titanium-based iridium oxide electrode is an iridium oxide layer. The iridium oxide layer is formed by stacking micron sheets which are 0.5-1 micron in size and uniform in size, the specific surface area of the iridium oxide layer is 200-300 m<2> / g, and iridium oxide is in an amorphous state. The invention further discloses a preparation method and application of the titanium-based iridium oxide electrode.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a dimensionally stable titanium-based iridium oxide electrode, its electrochemical preparation method and application. Background technique [0002] Titanium metal is a commonly used catalyst support because of its good electrical conductivity and corrosion resistance. At present, a large number of studies have shown that titanium-based iridium oxide IrOx / Ti electrodes have good application potential in many electrochemical engineering fields, such as electrocatalytic oxidation, biomedical applications, hydrometallurgical metal recovery, electroosmotic dehydration, etc. . The titanium-based iridium oxide IrOx / Ti electrode has excellent activity and stability in catalyzing the oxygen evolution reaction (Oxygen Revolution, OER) in acidic electrolyzed water. Titanium-based metal oxide coated electrodes are also called Dimensionally Stable Anodes (DSA), and their trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/052C25B11/063C25B11/075C25D9/04C25B1/04
CPCC25D9/04C25B1/04Y02E60/36
Inventor 王庆法赵蓉张香文
Owner TIANJIN UNIV
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