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Graphene composite metal oxide electrode and preparation method and application thereof

A graphene composite and composite electrode technology, which is applied to chemical instruments and methods, electrodes, electrode shapes/types, etc., can solve the problems affecting the electrolytic system, the coating is easy to fall off, and graphene drifts, etc., and the preparation process is simple and improved. Effect of binding force and carbon skeleton stabilization

Inactive Publication Date: 2017-05-10
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two disadvantages in the composite electrode prepared above: 1. The bonding force between graphene and the titanium substrate is poor, and the coating is easy to fall off; 2. The graphene layer on the titanium substrate is thick, and the excess graphene will float in the electrolyte. , affecting the electrolytic system

Method used

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  • Graphene composite metal oxide electrode and preparation method and application thereof
  • Graphene composite metal oxide electrode and preparation method and application thereof
  • Graphene composite metal oxide electrode and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The graphene composite Ru-Ir-Sn metal oxide electrode prepared in this embodiment comprises a titanium substrate and a composite coating positioned on the surface of the titanium substrate, and the composite coating is coated with a lower metal oxide layer, a graphite layer from bottom to top, and The ene-filled porous metal oxide layer and the upper metal oxide layer.

[0037] The specific preparation methods include:

[0038] (1) Select an industrial-grade titanium plate with a titanium alloy grade of TA2 and a thickness of 2mm, cut it into a rectangle of 80×20×2mm, perform sandblasting, etch and clean the surface with oxalic acid to remove the oxide layer on the surface;

[0039] (2) with RuCl 3 ·xH 2 O, H 2 IrCl 6 and SnCl 4 ·5H 2 The n-butanol mixed solution of O is the precursor, in which the molar ratio of Ru, Ir and Sn is 17:23:60, diluted with n-butanol so that the total concentration of metal ions is 0.6mol / L, and stirred evenly to obtain metal oxide pr...

Embodiment 2

[0051] The graphene composite metal oxide electrode network prepared in this embodiment comprises a titanium substrate and a composite coating positioned on the surface of the titanium substrate, and the composite coating is sequentially coated with a lower metal oxide layer and a graphene-filled porous metal from bottom to top. oxide layer and upper metal oxide layer. The specific preparation methods include:

[0052] (1) Select an industrial-grade titanium plate with a titanium alloy grade of TA2 and a thickness of 2mm, cut it into a rectangle of 80×20×2mm, perform sandblasting, etch and clean the surface with oxalic acid to remove the oxide layer on the surface;

[0053] (2) with RuCl 3 ·xH 2 O, H 2 IrCl 6 , SnCl 4 ·5H 2 The n-butanol mixed solution of O and tetrabutyl titanate is the precursor, in which the molar ratio of Ru, Ir, Sn and Ti is 36:4:20:40, diluted with dilute hydrochloric acid so that the total concentration of metal ions is 1.6 mol / L, stir evenly to ...

Embodiment 3

[0065] The graphene composite Ru-Ir-Sn metal oxide electrode prepared in this embodiment comprises a titanium substrate and a composite coating positioned on the surface of the titanium substrate, and the composite coating is coated with a lower metal oxide layer, a graphite layer from bottom to top, and The ene-filled porous metal oxide layer and the upper metal oxide layer. The specific preparation methods include:

[0066] (1) Select an industrial-grade titanium plate with a titanium alloy grade of TA2 and a thickness of 2mm, cut it into a rectangle of 80×20×2mm, perform sandblasting, etch and clean the surface with oxalic acid to remove the oxide layer on the surface;

[0067] (2) with RuCl 3 ·xH 2 O, H 2 IrCl 6 and SnCl 4 ·5H 2 The n-butanol mixed solution of O is the precursor, in which the molar ratio of Ru, Ir and Sn is 17:23:60, diluted with n-butanol so that the total concentration of metal ions is 0.6mol / L, and stirred evenly to obtain metal oxide precursor s...

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Abstract

The invention discloses a graphene composite metal oxide electrode and a preparation method and application thereof. The graphene composite metal oxide electrode comprises a titanium substrate and a composite coating positioned on the surface of the titanium substrate, wherein the composite coating is sequentially coated with a lower metal oxide layer, a graphene filled porous metal oxide layer and an upper metal oxide layer from bottom to top. The preparation method of the graphene composite metal oxide electrode is simple in process and easy to operate; the surface of the electrode is loose and porous after addition of graphene, so that the binding force between the coatings is improved; and the electrocatalytic activity is improved, and the chlorine evolution potential is lowered while the oxygen evolution potential is improved. The prepared graphene composite metal oxide electrode gives respective properties of titanium, graphene and the metal oxide layers into full play through the synergistic effect among titanium, graphene and the metal oxide layers, and is excellent in electrocatalytic activity, corrosion resistance and impact resistance, the current efficiency is improved and the service life is prolonged.

Description

technical field [0001] The invention belongs to the field of electrode materials, in particular to a graphene composite metal oxide electrode and its preparation method and application. Background technique [0002] Metal electrodes, dimensional stable anode (DSA), also known as shape-stable electrodes. Titanium is selected as the substrate and coated with noble metal oxides on the surface. The resulting titanium-based metal oxide electrode has good bending resistance, electrocatalytic activity and electrochemical stability, so it is used in many fields, such as electrowinning metallurgy, Electroplating, preparation of chlor-alkali, wastewater degradation, organic electrosynthesis, etc. Titanium-based metal oxide electrodes can be classified into Ru, Ir, Mn and Pb based electrodes according to the oxide composition. Nowadays, the manufacturing process of titanium-based metal oxide electrodes is becoming more and more mature, but it still cannot solve the shortcoming of the...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/03C25B1/34C02F1/461
CPCC02F1/46109C02F2001/46142C02F2001/46161C25B1/34C25B11/031C25B11/051C25B11/091
Inventor 保积庆包晓旸
Owner JIAXING UNIV
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