Drehring-Scheibenelektrode

Model HP-1 Rotating Ring-disk Electrode-----serial products of polarographic analytical instruments Model HP-1 Rotating Ring-disk Electrode (RRDE) is an important tool for electrochemistry analysis. The difference between a rotating ring-disk electrode and a is the addition of a second in the form of a ring around the central disk of the first working electrode. The two electrodes are separated by a non-conductive barrier and connected to the potentiostat through different leads. The RRDE takes advantage of the form of the flow created during rotation. As the system is rotated the solution in contact with the electrode is driven to the side of the electrode the same as with a rotating disk electrode. As the solution flows to the side it crosses the ring electrode and back into the bulk of the solution. If the flow in the solution is laminar than the solution, it is brought in contact with the disk quickly followed by the ring in a very controlled manner. The resulting currents are dependent on the electrodes respective potentials, areas, and spacing as well as the rotation rate and given substrate. The RRDE setup is useful in studying multi-electrons processes, the kinetics of a slow electron transfer, adsorption/desorption steps, and . It also has extensive application in process research of metal corrosion, chemical power source and electrochemical organic synthesis etc. Specifications: ·Rotating speed: 500 to 8000 r/min ·Rotating stability: <2000 r/min, <30r/min ≥2000 r/min, <50 r/min ·Concentricity of ring and disk: ≤Φ0.03 mm ·Radial swing of electrode head: ≤0.05 mm (without axial swing) ·Insulation resistance between ring and disk electrodes: ≥10MΩ ·Display: 4-digit LED ·Dimension: 2100mm×240mm×320mm ·Power consumption: 120W Characteristics: ·High insulation property between electrodes ·Fine concentricity between ring and disk ·Wide rotational speed range ·Automatically display rotational speed ·Automatically set and control the purging or stirring time