Method for electrochemically synthesizing alpha-PbO2 on rotating disk electrode

A technology of rotating disk electrode and disk electrode, which is applied in the fields of material preparation and electrochemistry to achieve the effect of high stability and good reproducibility

Active Publication Date: 2016-03-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Synthesis of α-form PbO on Rotating Disk Electrode 2 method has not yet been reported

Method used

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  • Method for electrochemically synthesizing alpha-PbO2 on rotating disk electrode
  • Method for electrochemically synthesizing alpha-PbO2 on rotating disk electrode
  • Method for electrochemically synthesizing alpha-PbO2 on rotating disk electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] like figure 1 As shown, the α-PbO was electrochemically synthesized on the rotating disk electrode 2 method, using a three-electrode system: the working electrode is a Pt disc electrode (the surface area of ​​the Pt disc is 0.196cm 2 , Pt disc rotation speed is 400rpm), the reference electrode is a saturated calomel electrode, and the auxiliary electrode is a surface area of ​​2cm 2 Platinum sheet placed in α-PbO 2 In the bath (α-PbO 2 The plating solution is added from PbO to NaOH solution, where NaOH and PbO are dissolved in HPbO - The molar ratio is 30:1, the concentration of NaOH solution is 3mol / L), the synthesis temperature is 40℃, and the polarization current is 15mA / cm 2 α-PbO can be deposited on the surface of the Pt disk under constant current polarization for 4h 2 , the α-PbO 2 Circular flaky α-PbO prepared by peeling off the surface of Pt disk and blowing dry 2 .

[0017] The circular flake-shaped α-PbO prepared in this example 2 It is black, with m...

Embodiment 2

[0019] like figure 1 As shown, the α-PbO was electrochemically synthesized on the rotating disk electrode 2 method, using a three-electrode system: the working electrode is a Pt disc electrode (the surface area of ​​the Pt disc is 0.196cm 2 , Pt disc rotation speed is 400rpm), the reference electrode is a saturated calomel electrode, and the auxiliary electrode is a surface area of ​​1cm 2 Platinum sheet placed in α-PbO 2 In the bath (α-PbO 2 The plating solution is added from PbO to NaOH solution, where NaOH and PbO are dissolved in HPbO - The molar ratio is 20:1, the concentration of NaOH solution is 3mol / L), the synthesis temperature is 30℃, and the polarization current is 10mA / cm 2 α-PbO can be deposited on the surface of the Pt disk under constant current polarization for 4h 2 , the α-PbO 2 Circular flaky α-PbO prepared by peeling off the surface of Pt disk and blowing dry 2 .

[0020] The circular flake-shaped α-PbO prepared in this example 2 It is black, with m...

Embodiment 3

[0022] like figure 1 As shown, the α-PbO was electrochemically synthesized on the rotating disk electrode 2 method, using a three-electrode system: the working electrode is a Pt disc electrode (the surface area of ​​the Pt disc is 0.196cm 2 , Pt disc rotation speed is 400rpm), the reference electrode is a saturated calomel electrode, and the auxiliary electrode is a surface area of ​​1cm 2 Platinum sheet placed in α-PbO 2 In the bath (α-PbO 2 The plating solution is added from PbO to NaOH solution, where NaOH and PbO are dissolved in HPbO - The molar ratio is 40:1, the concentration of NaOH solution is 4mol / L), the synthesis temperature is 40℃, and the polarization current is 15mA / cm 2 α-PbO can be deposited on the surface of Pt discs under constant current polarization for 8 hours 2 , the α-PbO 2 Circular flaky α-PbO prepared by peeling off the surface of Pt disk and blowing dry 2 .

[0023] The circular flake-shaped α-PbO prepared in this example 2 It is black, with...

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Abstract

The invention relates to a method for electrochemically synthesizing alpha-PbO2 on a rotating disk electrode and belongs to the technical field of electrochemistry and material preparation. Three electrode systems are adopted, specifically, the Pt disk electrode serves as a working electrode, a saturated calomel electrode serves as a reference electrode, and a platinum sheet with the surface area being 1-2 cm<2> serves as an auxiliary electrode. The electrodes are placed in an alpha-PbO2 plating solution, constant current polarization is carried out under the conditions that the synthesis temperature ranges from 30 DEG C to 40 DEG C and the polarization current ranges from 10 mA/cm<2> to 15 mA/cm<2>, alpha-PbO2 can be deposited on the surface of the Pt disk, and the alpha-PbO2 is stripped from the surface of the Pt disk and then blow-dried so as to obtain the disc-shaped alpha-PbO2. Through the method, the disc-shaped alpha-crystal-form PbO2 which is compact in structure, flat in surface and high in microhardness can be obtained.

Description

technical field [0001] The invention relates to an electrochemical synthesis of α-PbO on a rotating disk electrode 2 The method belongs to the technical fields of electrochemistry and material preparation. Background technique [0002] Lead dioxide (PbO 2 ) is one of the very few metal oxides with comparable conductivity to metals, and its resistivity is only 4×10 -5 ~5×10 -5 Ω cm, and also has the advantages of electrocatalytic activity, high oxygen evolution overpotential, good anti-oxidation and corrosion resistance, and low price. PbO 2 There are many preparation methods, which can be roughly divided into two types: chemical method and electrochemical method. The PbO prepared by electrochemical method is better than chemical method. 2 have higher electrochemical activity. Therefore, the current PbO 2 Anodes are mostly prepared by electrochemical methods. Among them, PbO 2 There are mainly two crystal forms of α and β. It is generally believed that the electrodep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/08
CPCC25D9/08
Inventor 徐瑞东何世伟王军丽韩莎王炯
Owner KUNMING UNIV OF SCI & TECH
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