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Composite intermediate layer capable of prolonging service life of titanium-based lead dioxide anode and preparation and application thereof

A composite intermediate layer and lead dioxide technology, applied in chemical instruments and methods, electrodes, coatings, etc., can solve the problems of low energy consumption, high energy consumption, and poor durability, and achieve cost reduction, high electrocatalytic activity, and long service life long effect

Inactive Publication Date: 2019-11-15
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
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Problems solved by technology

[0003] In order to solve the problems of poor durability and high energy consumption in the preparation technology of titanium-based shape-stable anodes, the purpose of the present invention is to provide a simple preparation method for composite intermediate layers that can prolong the life of titanium-based lead dioxide anodes, based on composite electrodeposition A life-extending strategy for the preparation of a high-performance single interlayer, by adding a single-layer α-PbO by co-depositing nanoparticles of tungsten carbide (WC) particles with good conductivity and "platinum-like" properties 2 -(Nano WC) Composite middle layer, composite particle WC can refine grains and change α-PbO 2 Preferential orientation of grains, co-deposition can reduce α-PbO 2 Cell voltage during preparation, WC and α-PbO 2 Co-deposition improves α-PbO 2 Microhardness and corrosion resistance of coatings, improving titanium-based PbO 2 service durability of the coating electrode; the present invention is an effective method to controllably construct a titanium-based metal oxide electrode by using electrochemical co-electrodeposition to prepare a composite intermediate layer, which not only fully exerts the advantages of the composite multifunctional coating, but also can A solid coating electrode foundation is obtained through the preparation of a composite interlayer to achieve long-term and reliable use of titanium-based metal oxide electrodes

Method used

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  • Composite intermediate layer capable of prolonging service life of titanium-based lead dioxide anode and preparation and application thereof
  • Composite intermediate layer capable of prolonging service life of titanium-based lead dioxide anode and preparation and application thereof
  • Composite intermediate layer capable of prolonging service life of titanium-based lead dioxide anode and preparation and application thereof

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Embodiment 1

[0024] Firstly, a single layer of α-PbO was prepared in one step by using the polished, alkali-washed, and pickled titanium plate as the substrate. 2 -(Nano WC) composite interlayer, and then α-PbO 2 -(Nano WC) The electrode material is the anode, the stainless steel with the same area is the cathode, and the anode is electrooxidized to prepare β-PbO 2 active layer, thus obtaining Ti / α-PbO 2 -(Nano WC) / PbO 2 shape stable anode. α-PbO 2 -(Nano WC) composite intermediate layer preparation process parameters: deposition solution is PbO: 25g / L, NaOH: 150 / L, WC: 10g / L, the concentration of surfactant SBS is 30mg / L, the deposition thickness is controlled to 40μm, direct current Deposition anode current density: 1A / dm 2 , the time is 1h, the stirring rate is 800r / min, the electrodeposition temperature is 50°C, and the electrodeposition time is 1h. After the completion, take out the sample and rinse it with 20% nitric acid, and dry it to get α-PbO with a uniform surface. 2 -(Nan...

Embodiment 2

[0026] A single-layer α-PbO was prepared in one step using a polished, alkali-washed, and pickled titanium plate as a substrate by a composite electrodeposition technique. 2 -(Nano WC) composite interlayer, and then α-PbO 2 -(Nano WC) is the anode, the stainless steel of the same size is the cathode, and the anode electrooxidizes to prepare β-PbO 2 active layer, thus obtaining Ti / α-PbO 2 -(Nano WC) / PbO 2 shape stable anode. Carry out SEM, EDX characterization ( figure 1 , 2 ). Indicating that WC recombines into α-PbO 2 In the middle layer, it can be seen from the scanning electron microscope that after compounding into WC particles, the obtained α-PbO 2 -(Nano WC) Composite middle layer is denser.

[0027] In summary, the present invention discloses a single-layer corrosion-resistant and conductive α-PbO by one-step method of anode electrochemical co-deposition 2 A method for prolonging the life of a titanium-based lead dioxide anode with a composite interlayer. It i...

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Abstract

The invention relates to a composite intermediate layer capable of prolonging the service life of a titanium-based lead dioxide anode. The expression of the composite intermediate layer is alpha-PbO2-(Nano WC). According to a preparation method of the intermediate layer, the alpha-PbO2-(Nano WC) composite intermediate layer is prepared by adopting an anode composite electrodeposition approach in aPbO alkaline plating solution into which platinum-like nano WC particles with great electricity conduction performance are added. The composite intermediate layer can be used as a titanium-based leaddioxide anode intermediate layer. The alpha-PbO2-(Nano WC) composite intermediate layer is prepared on a titanium substrate which is pretreated by oil removal and acid etching, then subjected to flowing water washing and neutralization and put into a lead nitrate bath liquid, and a beta-PbO2 active layer is electrodeposited on the alpha-PbO2-(Nano WC) composite intermediate layer by the anode, sothat the coating anode of a Ti / alpha-PbO2-(Nano WC) / beta-PbO2 structure is finally obtained. The preparation method is an effective method for controllably constructing a titanium-based metal oxide electrode by utilizing electrochemical co-electrodeposition to prepare the composite intermediate layer, not only the advantages of a composite multifunctional coating be fully exerted, but also a firmcoating electrode base can be obtained through preparation of the composite intermediate layer, and correspondingly long-term reliable use of the titanium-based metal oxide electrode is achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of lead dioxide shape-stable anodes, in particular to a simple preparation method for a composite intermediate layer capable of prolonging the service life of titanium-based lead dioxide anodes. Background technique [0002] The insoluble anode used in the electrolysis industry should have at least three conditions: high electrical conductivity, good electrocatalytic activity and good corrosion resistance. Titanium-based lead dioxide anode is a new type of insoluble metal oxide anode material, which is widely used in metallurgy due to its high oxygen evolution potential, strong oxidation ability, good corrosion resistance, good conductivity, and high current capability. , environmental protection and the electrolytic preparation of various organic and inorganic substances are also widely used. Although PbO 2 Titanium electrodes have many advantages, but due to β-PbO 2 Has a large internal s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/16C25B11/10C25C7/02C02F1/461C25D15/00
CPCC02F1/46109C02F2001/46138C25C7/02C25D15/00C25B11/051C25B11/091
Inventor 唐长斌王飞牛浩黄平于丽花薛娟琴
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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