Preparation method of modified graphene supported precious metal oxide anode

A noble metal oxide and oxide technology, applied in the field of electrochemistry, can solve the problems such as the inability to give full play to the excellent characteristics of high surface area, restrict the anode performance, high temperature ablation and decomposition of graphene, etc., and achieve the improvement of anode performance and electrocatalytic activity. and the effect of improved stability and simple operation

Inactive Publication Date: 2017-10-20
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

[0004] Our previous Chinese patent application (Xin Yonglei, Liu Feng, Xu Likun, a preparation method of graphene-doped metal oxide anode, application number 201510205726.3) discloses a preparation method of graphene-doped metal oxide anode, by doping Adding an appropriate amount of graphene can improve the electrocatalytic activity and stability of the anode, but it is found that graphene has serious high-temperature ablation and decomposition problems during the preparation process, which leads to the inability to give full play to its excellent characteristics of high surface area, which restricts the performance of the anode. Substantial increase

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  • Preparation method of modified graphene supported precious metal oxide anode
  • Preparation method of modified graphene supported precious metal oxide anode
  • Preparation method of modified graphene supported precious metal oxide anode

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preparation example Construction

[0040] The preparation method of described novel anode is:

[0041] The solution containing the modified graphene-loaded noble metal oxide was transferred to the electrolytic cell, the titanium substrate after degreasing and oxalic acid etching was used as the cathode, and the platinum sheet was used as the anode. cm 2 ~15mA / cm 2 , the electrodeposition time is 10min to 60min, and finally a modified graphene-enhanced metal oxide anode is obtained on the surface of the titanium substrate, and the metal oxide loading reaches 10g / m 2 ~15g / m 2 .

Embodiment 1

[0043] Example 1 Modified graphene loaded noble metal oxide anode

[0044] The first step, substrate pretreatment: use a TA2 industrial pure titanium plate with a plate shape of 140mm×110mm×3mm as the electrode substrate, first use corundum with a particle size of 120μm to sandblast the titanium plate, and rinse with distilled water to remove residual sand and metal chips; Then put the titanium plate into acetone for degreasing, finally put the degreasing titanium plate into 10% (mass fraction) oxalic acid solution, keep it in boiling state for 2h, take it out and rinse it with deionized water. Dry the above-mentioned treated titanium plates and put them in absolute ethanol for later use.

[0045] The second step, graphene modification, adopts commercially available graphene as the raw material, the single-layer rate is 80%, and the thickness is 0.8nm; the plasma pretreatment method is adopted, and the plasma treatment time is 120s under nitrogen atmosphere, and the flow rate ...

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Abstract

The invention provides a high-performance metal oxide anode. The high-performance metal oxide anode comprises a conductive substrate and a modified graphene doped precious metal oxide coating deposited on the conductive substrate. Effective supporting of precious metal precursors on the surface of modified graphene is achieved through a hydrothermal chemical synthesis method, graphene truly exists in an anode coating, and electrocatalytic activity and stability of the anode are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, in particular to a method for preparing a modified graphene-loaded noble metal oxide. Background technique [0002] The anode used in the electrolysis industry requires good electrocatalytic activity in order to reduce the tank pressure of the electrolytic cell and improve the electrolysis efficiency; at the same time, it also needs to have high stability and long service life. Titanium-based metal oxide anode is made of titanium substrate coated with IrO 2 , RuO 2 、 Ta 2 o 5 , SnO 2 It is composed of noble metal oxide coatings, because of its good electrochemical activity, low consumption rate and long life, and light weight, easy to process into the desired shape, high cost performance and broad-spectrum adaptability, etc., in chlor-alkali It is widely used as an oxygen evolution or chlorine evolution electrode in the fields of industry, electroplating, sewage treatment, cathodic ...

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Application Information

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IPC IPC(8): C25B11/06C25D9/04
CPCC25D9/04C25B11/091
Inventor 辛永磊段体岗许立坤
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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