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636A Rotating Ring-Disk Electrode (RRDE)


A RRDE system uses two potentiostats or a bipotentiostat to separately polarize a Ring electrode and a Disk electrode.  These two electrodes are co-mounted on a specially designed electrode tip.  Fluid flow created by the rotation of this tip in electrolyte causes mass-transport of the products from electrochemical reaction at the inner disk electrode to be measured by outter ring electrode.  This study allows investigation of electrochemical reaction paths (mechanisms) common to fuel cell catalyst evaluations.

A RDE system uses a single potentiostat to polarize a Disk electrode.  Rotation of this disk electrode encourages mass-transport of ions in solution to the electrode surface.  This increased flux benefits physical electrochemistry applications, such electroplating and fundamental research.

A RCE system uses a larger area electrode that is a different form.  This is common configuration for studying velocity-sensitive electrochemical corrosion such as in an oil and gas pipeline.
The Princeton Applied Research model 636A Electrode Rotator supports all different rotating electrode experiments including Rotating Ring Disk Electrode (RRDE), Rotating Disk Electrode (RDE) and Rotating Cylinder Electrode (RCE).

  • RRDE, RDE or RCE Configuration
  • Rotational Speeds to 10,000 RPM
  • A variety of Disk and Ring-Disk Electrode selections: different electrode materials; Quick-Change versus Fixed configurations; PTFE versus PEEK shroud
  • Quick-Change and Fixed Electrode Design of RRDE, RDE electrodes
  • On/Off and Rotational Rate Control through DAC control of many potentiostats from Princeton Applied Research
  • Protective enclosure
  • Switching power supply that can be used in laboratories across the world.

    The model 636A is suitable for use in hydrodynamically modulated systems. Its solid state controlled servosystem allows the electrode speed to follow an input signal with minimum distortion. This excellent performance is due to the use of a high speed, low inertia, permanent magnet DC motor and a high voltage, bipolar power supply. The rotational speed is adjustable to within 1% of the input setting 50-10,000 RPM.

    We can supply a variety of electrode materials for the model 636A.  The most common are Platinum (Pt), Gold (Au), and glassy carbon (GC) for disk work; a combination of these for RRDE; and steel electrodes from RCE.  For custom electrode materials, please contact AMETEK Scientific Instruments for availability.
    • Documents +

    • Specifications +


      Specifications
      Power 115V AC or 230V AC, 50/60Hz, factory connected
      Weight Body with base: 23 lbs Control unit: 11.5lbs
      Operating Temperature 10°C to 40°C
      Control Unit Dimensions 11 3/8” W x 10 1/8” D x 5 ¾” H
      Base Dimensions 11” W x 15” D x 3/4” H
      Motor 1/50 HP permanent magnet DC
      Motor Power Supply +45V DC, -20V DC
      Speed Control Closed loop servo-system.  Temperature compensated tach generator mounted on motorshaft, providing rotational speed information
      Speed Range 50RPM to 10,000RPM
      Precision Better than ±1%
    • Options +


      Fixed-Disk Electrodes for RDE (616A/B and 636A with RDE0027 Compatible)
      RDE0027 Shaft for 636A (Disk Arbor). See section for compatibility.
      RDE0005 Fixed-Disk Electrode Au RDE Tip (PTFE)
      RDE0005PK Fixed-Disk Electrode Au RDE Tip (PEEK)
      RDE0008 Fixed-Disk Electrode GC RDE Tip (PTFE)
      RDE0008PK Fixed-Disk Electrode GC RDE Tip (PEEK)
      RDE0004 Fixed-Disk Electrode Pt RDE Tip (PTFE)
      RDE0004PK Fixed-Disk Electrode Pt RDE Tip (PEEK)
      Fixed-Disk Electrodes for RDE (636A, RDE0070 Compatible)
      RDE0070 Shaft for 636A (Ring-Disk Arbor). See section for compatibility.
      RDE0007 Fixed-Disk Electrode Au RDE Tip (PTFE)
      RDE0007PK Fixed-Disk Electrode Au RDE Tip (PEEK)
      RDE0009 Fixed-Disk Electrode GC RDE Tip (PTFE)
      RDE0009PK Fixed-Disk Electrode GC RDE Tip (PEEK)
      RDE0006 Fixed-Disk Electrode Pt RDE Tip (PTFE)
      RDE0006PK Fixed-Disk Electrode Pt RDE Tip (PEEK)


      Fixed Electrodes for RRDE (636A, RDE0070 Compatible)
      RDE0070 Shaft for 636A (Ring-Disk Arbor). See section for compatibility.
      RDE0071 Fixed Electrode Pt Disk - Pt Ring RRDE Tip (PTFE), 0.18-mm gap
      RDE0071PK Fixed Electrode Pt Disk - Pt Ring RRDE Tip (PEEK), 1-mm gap
      RDE0072 Fixed Electrode GC Disk - Au Ring RRDE Tip (PTFE), 0.32-mm gap
      RDE0072PK Fixed Electrode GC Disk - Au Ring RRDE Tip (PEEK), 1-mm gap
      RDE0073 Fixed Electrode GC Disk - Pt Ring RRDE Tip (PTFE), 0.32-mm gap
      RDE0073PK Fixed Electrode GC Disk - Pt Ring RRDE Tip (PEEK), 1-mm gap
      AFE7R9GCGC Fixed Electrode GC Disk - GC Ring RRDE Tip (PTFE), 0.32-mm gap
      RDEAFE6R2GCGC Fixed Electrode GC Disk - GC Ring RRDE Tip (PEEK), 1-mm gap
      RDEAFE6R2AUAU Fixed Electrode AU Disk - AU Ring RRDE Tip (PEEK), 1-mm gap


      ChangeDisk Tips for RDE. Requires Electrode Inserts and Tools (616A/B and 636A with RDE0027 Compatible)
       AFE4TQ050
       ChangeDisk RDE Tip (PTFE)
       RDEAFE4K050  ChangeDisk Toolkit (for AFE4TQ050)
         
      ChangeDisk Tips for RDE, RRDE. Requires Electrode Inserts and Tools (636A, RDE0070 Compatible)
      RDE0081 ChangeDisk RDE Tip (PTFE)
      RDE0081PK ChangeDisk RDE Tip (PEEK)
      RDE0082AU ChangeDisk RRDE Au Ring Tip (PTFE), 1.5-mm gap
      RDE0082AUPK ChangeDisk RRDE Au Ring Tip (PEEK), 1.5-mm gap
      RDE0082PT ChangeDisk RRDE Pt Ring Tip (PTFE), 1.5-mm gap
      RDEAFE6R1PTPK ChangeDisk RRDE Pt Ring Tip (PEEK), 1.5-mm gap
      ChangeDisk Disk Electrode Inserts and Tools (636A, RDE0070 Compatible)
      AFED050P040GC GC Disk Insert
      RDE0083PT PT Disk Insert
      RDEAFED050P040AU AU Disk Insert
      RDEAFED050P040T5 430 SS Disk Insert
      RDEAFE6K050 ChangeDisk Toolkit (for RDE0081, RDE0081PK)
      RDE0085 Replacement U-Cups (PTFE, pack of 3)


      616A & 636A Accessories
      RDE0011 Rotating Cylinder Electrode (RCE) Assembly with Tool and a 430 SS sample
      RDE0027 Shaft for 636A (Disk Arbor). See section for compatibility.
      RDE0070 Shaft for 636A (Ring-Disk Arbor). See section for compatibility.