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Preparation method of Ti-based nano-CeO2/PbO2 modified electrode

A modified electrode and nanotechnology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of electrode deactivation, poor electrocatalytic performance, etc.

Inactive Publication Date: 2013-01-30
HUAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is further modified, the catalytic performance and electrochemical performance of the prepared electrode will be greatly improved, which can fundamentally solve the current Ti / PbO 2 Metal oxide electrodes have problems such as electrode deactivation and poor electrocatalytic performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. First, polish and polish the Ti substrate of 2cm×2cm×5mm with 250 mesh, 600 mesh and 1000 mesh sandpaper respectively to make it present a silvery white metallic luster. Then rinse it with distilled water, then with hydrofluoric acid, and then use acetone and absolute ethanol for 20 minutes of ultrasonic cleaning to remove the oil on the surface of the Ti substrate.

[0018] 2. Put the cleaned titanium sheet into the electrolytic cell as the anode, and the 4cm×4cm×5mm pure lead plate as the cathode, at 0.1mol L -1 PbO+2.5mol L -1 Alkaline electroplating solution of NaOH, voltage 1V, temperature 35°C, electroplating time 60min, the transition layer α-PbO is first electroplated on the surface of Ti metal 2 .

[0019] 3. The plated Ti / α-PbO 2 put in 0.2mol·L -1 HNO 3 +0.02mol·L -1 In the NaF+0.65mol / l lead nitrate acidic plating solution, a 4cm×4cm×5mm pure lead plate is used as the cathode, and the α-PbO 2 The surface is then coated with a layer of catalytically...

Embodiment 2

[0022] 1. First, polish and polish the Ti substrate of 2cm×2cm×5mm with 250 mesh, 600 mesh and 1000 mesh sandpaper respectively to make it present a silvery white metallic luster. Then rinse it with distilled water, then with hydrofluoric acid, and then use acetone and absolute ethanol for 20 minutes of ultrasonic cleaning to remove the oil on the surface of the Ti substrate.

[0023] 2. Put the cleaned titanium sheet into the electrolytic cell as the anode, and the 4cm×4cm×5mm pure lead plate as the cathode, at 0.2mol L -1 PbO+2.5mol L -1 Alkaline electroplating solution of NaOH, voltage 2V, temperature 35°C, electroplating time 90min, first electroplate transition layer α-PbO on the surface of Ti metal 2 .

[0024] 3. The plated Ti / α-PbO 2 put in 0.2mol·L -1 HNO 3 +0.03mol·L -1 In the NaF+0.65mol / l lead nitrate acidic plating solution, a 4cm×4cm×5mm pure lead plate is used as the cathode, and the plated α-PbO 2 The surface is then coated with a layer of catalytically ...

Embodiment 3

[0027] 1. First, polish and polish the 2cm×2cm×5mm Ti substrate with 250-mesh, 600-mesh and 1000-mesh sandpaper to make it appear silvery white metallic luster. Then rinse it with distilled water, then with hydrofluoric acid, and then use acetone and absolute ethanol for 20 minutes of ultrasonic cleaning to remove the oil on the surface of the Ti substrate.

[0028] 2. Put the cleaned titanium sheet into the electrolytic cell as the anode, and the 4cm×4cm×5mm pure lead plate as the cathode, at 0.3mol L -1 PbO+2.5mol L -1 NaOH alkaline electroplating solution, voltage 2V, temperature 35°C, electroplating time 120min, the transition layer α-PbO is first electroplated on the surface of Ti metal 2 .

[0029] 3. The plated Ti / α-PbO 2 put in 0.2mol·L -1 HNO 3 +0.04mol·L -1In the NaF+0.65mol / l acidic electroplating solution, a 4cm×4cm×5mm pure lead plate is used as the cathode, and the plated α-PbO 2 The surface is then coated with a layer of catalytically active β-PbO 2 . T...

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Abstract

The invention relates to a preparation method of a rare earth oxide cerium oxide (Ce2O3) modified high catalytic activity Ti-based nano-PbO2 modified electrode material. One of the key issues involved is preparation of a rare earth cerium oxide (Ce2O3) modified lead electrode material. The invention employs an electrodeposition process and selects a rare earth oxide cerium oxide to modify a Ti / PbO2 metal oxide electrode. The method provided in the invention comprises: first, during preparation of a titanium-based PbO2 electrode, in an alkaline electroplating solution, conducting electroplating firstly at a high current density and then at a small current density to get a transition layer, i.e. an alpha-PbO2 layer, next, in an acidic electroplating solution, electroplating beta 3-PbO2 having catalytic activity on the well electroplated alpha-PbO2 layer, and finally in a dilute nitric acid solution containing rare earth cerium nitrate, employing a cyclic voltammetric electroplating process to modify a Ti / PbO2 electrode, thus obtaining the cerium oxide (Ce2O3)-doped and modified high catalytic activity Ti / PbO2-Ce2O3 modified electrode material.

Description

technical field [0001] The invention belongs to the field of electrode material preparation, and relates to a method for preparing rare earth oxide-cerium oxide (CeO 2 ) modified Ti-based nano-PbO with high catalytic activity 2 Preparation method of modified electrode material. Background technique [0002] With the increasingly high requirements for green chemical synthesis technology, organic electrochemical synthesis technology has attracted the attention of various countries due to its high efficiency and low pollution. However, in order to achieve large-scale industrial production, the core is to have high-performance electrode materials. The quality of electrode materials not only directly affects the selectivity and reaction rate of the reaction, but also affects the energy consumption of the process, which determines the overall organic electrosynthesis process. technical and economical. [0003] At present, Pb oxide or Pb alloy oxide is mainly used as anode mater...

Claims

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Application Information

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IPC IPC(8): C25B11/04
Inventor 王凤武徐迈李书东方文彦
Owner HUAINAN NORMAL UNIV
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