Application Research of Rotating Disk Electrode (1)

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Application Research of Rotating Disk Electrode (1)

Classic application of PINE rotating disc electrode: Oxygen Reduction Reaction (ORR) is the preferred cathode reaction for all fuel cells and metal-air batteries, and is the main reaction in many metal corrosion processes.

  1. Why rotating disk electrodes can be applied to ORR
  2. The advantage of rotating the disk electrode is that there is a clear function between the thickness of the diffusion layer of the electrode solution interface and the electrode rotation speed. Therefore, the mass transfer of the reactants and products can be regulated by changing the rotation speed of the reaction. For the oxygen reduction reaction which is not reversible on the smooth electrode, the intrinsic kinetic parameters of the electrode pair reaction can be obtained by simple mathematical treatment to completely eliminate the influence of mass transfer.
  1. Pine Rotating Disc Electrode Oxygen Reduction Research Application Case
    1. Angew. Chem. Int. Ed, Sulfur and Nitrogen Dual-Doped Mesoporous Graphene Electrocatalyst for Oxygen Reduction with Synergistically Enhanced Performance;
    2. Angew. Chem. Int. Ed, Nitrogen-Doped Ordered Mesoporous Graphitic Arrays with High Electrocatalytic Activity for Oxygen Reduction;
    3. NATURE MATERIALS,Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reaction;
    4. ACS Applied Materials & Interfaces, NiCo2S4@graphene as a Bifunctional Electrocatalyst for Oxygen Reduction and Evolution Reactions;
    5. Angew. Chem. Int. Ed, Nitrogen-Doped Carbon Nanosheets with Size-Defined Mesopores as Highly Efficient Metal-Free Catalyst for the Oxygen Reduction;
    6. Elsevier, An Efficient Bi-functional Electrocatalyst Based on Strongly Coupled CoFe2O4/Carbon Nanotubes Hybrid for Oxygen Reduction and Oxygen Evolution;
    7. Pine rotating disk electrode for multi-copper oxidase catalytic oxygen reduction kinetics;
    8. Pine spin disk electrode for the preparation of metal doped polypyrrole carbide PPY-M and its electrocatalytic activity for oxygen reduction reaction;
    9. Pine rotating disk electrode for functional modification of graphene and its application in oxygen reduction electrocatalysis;
    10. Pine rotating disk electrode for carbon-based metal-free oxygen reduction electrocatalyst
  2. Pine rotating disk electrode experimental operation example
  3. Acid system
  4. Perchloric acid, 25 ° C, commercial Pt / C as a catalyst, 5 mg 20% ​​Pt / C (JM company) dissolved in 300 uL water, 700 uL isopropanol, 100 uL 5% Nafion ultrasound for one hour, drop 10uL on 5mm disk electrode CV50 circle under N2 (0-1.23 V VS.RHE), then LSV (1-0.2 V VS.RHE under saturated oxygen conditions) at 2500, 2025, 1600, 1225, 900, 625, 400 rpm .
  5. Alkaline system
  6. Potassium hydroxide, 25 ° C, commercial Pt / C as a catalyst, 5 mg 20% ​​Pt / C (JM company) dissolved in 300 uL water, 700 uL isopropanol, 100 uL 5% Nafion ultrasound for one hour, drop 10uL on 5mm disc electrode , CV50 circle under N2 (0.2-0.9 V VS.SCE), then LSV (0-0.9 V VS.SCE, under saturated oxygen conditions), respectively at 2500, 2025, 1600, 1225, 900, 625, 400 rpm .
  7. Precautions
    1. Electrode grinding is generally first polished with 5um polishing powder, and then polished with 0.5um and 0.05um polishing powder to smooth;
    2. Usually, 10 uL of the catalyst solution is dropped onto the surface of the electrode, and then covered with a watch glass or a petri dish or a beaker, and dried naturally. It is not recommended to dry the oven at a high temperature. The catalyst prepared in this way is easily cracked. If infrared heating is used, the power should be reduced as much as possible;
    3. When scanning LSV, it is recommended to pre-sweep from low speed to high speed, then from high speed to low speed;
    4. Before LSV scanning, first pass O2 into the electrolyte, and when scanning LSV, continue to pass O2 to the electrolyte liquid surface to ensure O2 saturation in the electrolyte;
    5. The sealing of the electrolytic cell ensures O2 saturation in the electrolyte during the experiment. If the seal is not good, it will cause O2 to escape, and the experimental data is not regular.
  8. Pine rotating disc electrode features
  9. The pine rotating disc electrode is represented by the physics and chemistry company. The physicochemical company has professional application engineers, sales engineers and commissioning engineers.
  10. The rotating disc electrode has a large electrode, the reaction is more complete, the data is more scientific, and it is more research-oriented;
  11. Rotating disc electrode rods are ultra-collimated, providing stable kinetic reaction conditions even for large electrodes;
  12. Rotating master electrodes is the first choice for electrochemical scientists worldwide, and has been used by more than 1,000 users in China.

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