A titanium-clad aluminum-based β-pbo 2 -Preparation method of graphene composite electrode

A graphene composite, titanium-clad aluminum technology, applied in the direction of electrodes, electrolytic components, electrolytic process, etc., to achieve the effect of improving corrosion resistance and electrocatalytic activity, improving mechanical strength, strong stability and electrical conductivity

Active Publication Date: 2021-03-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of lead dioxide electrodes in the prior art, the present invention provides a titanium-clad aluminum-based β-PbO 2 -The preparation method of graphene composite electrode, the present invention carries out covalent bond functionalization treatment to graphene, then prepares covalent bond functionalized nano-graphene / lead nitrate-sodium fluoride-nitric acid plating solution to pretreat cylindrical Titanium-clad aluminum is used as the anode and makes it rotate around its own axis, and the stainless steel ring is used as the cathode to electroplate graphene β-PbO under anodic polarization conditions. 2 Obtaining Cylindrical Titanium-clad Al-Based β-PbO 2 -Graphene composite electrode

Method used

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  • A titanium-clad aluminum-based β-pbo <sub>2</sub> -Preparation method of graphene composite electrode
  • A titanium-clad aluminum-based β-pbo <sub>2</sub> -Preparation method of graphene composite electrode
  • A titanium-clad aluminum-based β-pbo <sub>2</sub> -Preparation method of graphene composite electrode

Examples

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Effect test

Embodiment 1

[0032] Example 1: A titanium-clad aluminum-based β-PbO 2 -The preparation method of graphene composite electrode, concrete steps are as follows:

[0033] (1) Add graphene to H 2 SO 4 -HNO 3 -H 2 o 2 - In the mixed acid solution of high potassium sulfate, the temperature is 50 ° C under mechanical stirring for 60 minutes; then ultrasonic stripping is carried out for 120 minutes to obtain nano-graphene; wherein H 2 SO 4 -HNO 3 -H 2 o 2 - H in high potassium sulfate mixed acid solution 2 SO 4 At a concentration of 9 mol / L, HNO 3 Concentration is 3 mol / L, H 2 o 2 The mass fraction is 10%, the concentration of high potassium sulfate is 1mol / L; the thickness of graphene is 10~12nm, the conductivity is 850~950S / m, graphene and H 2 SO 4 -HNO 3 -H 2 o 2 -The solid-to-liquid ratio g:mL of high potassium sulfate mixed acid solution is 1:5;

[0034] (2) Clean the nano-graphene in step (1), then add it to sodium borohydride solution for reduction for 15 minutes to obtain...

Embodiment 2

[0040] Example 2: A titanium-clad aluminum-based β-PbO 2 -The preparation method of graphene composite electrode, concrete steps are as follows:

[0041] (1) Add graphene to H 2 SO 4 -HNO 3 -H 2 o 2 - In the mixed acid solution of high potassium sulfate, mechanical stirring was carried out at a temperature of 60°C for 80 minutes; then ultrasonic stripping was carried out for 60 minutes to obtain graphene nanometers; wherein H 2 SO 4 -HNO 3 -H 2 o 2 - H in high potassium sulfate mixed acid solution 2 SO 4 The concentration is 10mol / L, HNO 3 Concentration is 4mol / L, H 2 o 2 The concentration is 15%, the concentration of high potassium sulfate is 2mol / L; the thickness of graphene is 11~13nm, the conductivity is 950~1050 S / m, graphene and H 2 SO 4 -HNO 3 -H 2 o 2 -the solid-to-liquid ratio g:mL of high potassium sulfate mixed acid solution is 1:3;

[0042] (2) Clean the nano-graphene in step (1), then add it to sodium borohydride solution for reduction for 20 mi...

Embodiment 3

[0047] Example 3: A titanium-coated aluminum-based β-PbO 2 -The preparation method of graphene composite electrode, concrete steps are as follows:

[0048] (1) Add graphene to H 2 SO 4 -HNO 3 -H 2 o 2 - In the mixed acid solution of high potassium sulfate, the temperature is 80 ° C under mechanical stirring for 120 min; then ultrasonic stripping is carried out for 80 min to obtain nano-graphene; wherein H 2 SO 4 -HNO 3 -H 2 o 2 - H in high potassium sulfate mixed acid solution 2 SO 4 The concentration is 13mol / L, HNO 3 Concentration is 5 mol / L, H 2 o 2 The mass percentage is 30%, the concentration of high potassium sulfate is 3 mol / L; the thickness of graphene is 10~14 nm, the conductivity is 850~950 S / m, graphene and H 2 SO 4 -HNO 3 -H 2 o 2 -the solid-to-liquid ratio g:mL of high potassium sulfate mixed acid solution is 1:5;

[0049] (2) Clean the nano-graphene in step (1), then add it to sodium borohydride solution for reduction for 20 minutes to obtain r...

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Abstract

The invention discloses a preparation method of a titanium-coated aluminum-based beta-PbO2-graphene composite electrode and belongs to the technical field of composite electrodes. According to the preparation method, graphene is subjected to covalent bond functionalization treatment, and then a covalent bond functionalized nano-graphene / lead nitrate-sodium fluoride-nitric acid plating solution isprepared, a pretreated cylindrical titanium-coated aluminum serves as an anode and rotates around the axis of the pretreated cylindrical titanium-coated aluminum, a stainless steel ring serves as a cathode, and graphene beta-PbO2 is electroplated under the condition of anode polarization to obtain the cylindrical titanium-coated aluminum-based beta-PbO2-graphene composite electrode. A graphene beta-PbO2 electrode coating prepared according to the preparation method is dense in crystal, is in gray-black, has the thickness of 100-200 mum, and is high in electrocatalysis activity and corrosion resistance.

Description

technical field [0001] The invention relates to a titanium-coated aluminum-based β-PbO 2 -A preparation method for a graphene composite electrode, which belongs to the technical field of composite electrodes. Background technique [0002] In modern zinc smelting processes, key issues are energy consumption and the purity of the cathode product. Commonly used anode materials mainly include magnetic iron oxide, graphite, lead and lead-based alloys, lead dioxide, platinum and platinum group metal oxides, platinum plating, etc., but these materials have the following problems: difficult preparation, poor corrosion resistance, mechanical strength Low, low current efficiency, high energy consumption, expensive and other defects. [0003] Among them, the main problems of lead, lead-based alloys, and lead dioxide materials are poor corrosion resistance, low mechanical strength, and low current efficiency. These problems lead to the life of such materials. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/34C25D15/00C25D5/38C25D21/10C25D21/12C25C7/02
CPCC25C7/02C25D3/34C25D5/38C25D15/00C25D21/10C25D21/12
Inventor 陈阵吴丹余强朱薇郑涛桂来宋钰珠
Owner KUNMING UNIV OF SCI & TECH
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