Method for electrochemically synthesizing beta-PbO2 on rotating disk electrode

A technology of rotating disk electrodes and disk electrodes, which is applied in the field of material preparation and electrochemistry, and achieves 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 β-form PbO on Rotating Disk Electrode 2 method has not yet been reported

Method used

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

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Embodiment 1

[0016] Such as figure 1 As shown, the β-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 , the rotation speed of the Pt disc is 200rpm), the reference electrode is a saturated calomel electrode, and the auxiliary electrode is a surface area of ​​2cm 2 Platinum sheet placed in β-PbO 2 In the bath (β-PbO 2 The plating solution is composed of Pb(NO 3 ) 2 Join HNO 3 solution, where Pb(NO 3 ) 2 Medium Pb 2+ with HNO 3 The molar ratio is 4:1, HNO 3 The concentration of the solution is 0.15mol / L), at a synthesis temperature of 40°C and a polarization current of 40mA / cm 2 β-PbO can be deposited on the surface of the Pt disk under constant current polarization for 2h 2 , the β-PbO 2 Circular flaky β-PbO was prepared by peeling off the surface of Pt disk and blowing dry 2 .

[0017] The circular flake-shaped β-PbO prepa...

Embodiment 2

[0019] Such as figure 1 As shown, the β-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 300rpm), the reference electrode is a saturated calomel electrode, and the auxiliary electrode is a surface area of ​​2cm 2 Platinum sheet placed in β-PbO 2 In the bath (β-PbO 2 The plating solution is composed of Pb(NO 3 ) 2 Join HNO 3 solution, where Pb(NO 3 ) 2 Medium Pb 2+ with HNO 3 The molar ratio is 7:1, HNO 3 The concentration of the solution is 0.1mol / L), at a synthesis temperature of 40°C and a polarization current of 40mA / cm 2 β-PbO can be deposited on the surface of the Pt disk under constant current polarization for 2h 2 , the β-PbO 2 Circular flaky β-PbO was prepared by peeling off the surface of Pt disk and blowing dry 2 .

[0020] The circular flake-shaped β-PbO prepared in this ...

Embodiment 3

[0022] Such as figure 1 As shown, the β-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 300rpm), the reference electrode is a saturated calomel electrode, and the auxiliary electrode is a surface area of ​​2cm 2 Platinum sheet placed in β-PbO 2 In the bath (β-PbO 2 The plating solution is composed of Pb(NO 3 ) 2 Join HNO 3 solution, where Pb(NO 3 ) 2 Medium Pb 2+ with HNO 3 The molar ratio is 5:1, HNO 3 The concentration of the solution is 0.12mol / L), at a synthesis temperature of 50°C and a polarization current of 50mA / cm 2 β-PbO can be deposited on the surface of Pt discs under constant current polarization for 4h 2 , the β-PbO 2 Circular flaky β-PbO was prepared by peeling off the surface of Pt disk and blowing dry 2 .

[0023] The circular flake-shaped β-PbO prepared in this em...

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Abstract

The invention relates to a method for electrochemically synthesizing beta-PbO2 on a rotating disk electrode and belongs to the technical field of electrochemistry and material preparation. A three-electrode system is adopted, specifically, a Pt disk electrode serves as the working electrode, a saturated calomel electrode serves as the reference electrode, and a platinum sheet with the surface area being 2 cm<2> serves as the auxiliary electrode. The electrodes are placed in a beta-PbO2 plating solution, constant current polarization is carried out under the conditions that the synthesis temperature ranges from 40 DEG C to 50 DEG C and the polarization current ranges from 40 mA/cm<2> to 50 mA/cm<2>, beta-PbO2 can be deposited on the surface of the Pt disk, and the beta-PbO2 is stripped from the surface of the Pt disk and then blow-dried so as to obtain the disc-shaped beta-PbO2. Through the method, the disc-shaped beta-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 β-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王炯韩莎
Owner KUNMING UNIV OF SCI & TECH
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