The active surface of the electrode is a silver disk set into the tip of the body. Silver is known as a catalyst with high selectivity toward carbon monoxide (CO) in the electrochemical reduction of carbon dioxide (CO₂RR), so it is used as a flat, well-defined silver surface in CO₂ reduction studies. In analytical electrochemistry it is also chosen for applications such as cyanide and sulfide determination.

This model has a standard straight PTFE body, with the silver disk at the tip, in line with the rod. Disk diameters: Ø2–6 mm. PTFE is inert to nearly all acids, bases and solvents, so it can also be used with organic-solvent-based electrolytes. It is soft, so avoid scratching or denting it. PEEK, L- and T-type versions are on separate pages.

Key Features

PTFE body: inert to nearly all acids, bases and solvents; as a soft material (Shore D ≈ 55) it needs care against scratches and dents
Standard straight body: the disk sits on the end face, in line with the rod; the electrode is dipped vertically into the cell
Silver disk: a catalyst surface with high CO selectivity in CO₂ reduction
Suitable for analytical applications such as cyanide and sulfide determination
Disk diameter options Ø2, 3, 4, 5 and 6 mm
Easy surface renewal with a 1–2 minute alumina polish
Body length 60 mm, total length ≈75 mm (manufacturer data); gold-plated contact pin at the tail

Technical Specifications

Electrode type	Silver disk working electrode
Electrode shape	Standard straight rod; disk on the end face, in line with the body axis
Body material	PTFE (polytetrafluoroethylene)
Disk material	Silver
Disk diameter	2, 3, 4, 5, 6 mm
Silver disk length	5–10 mm (manufacturer data)
Body / total length	60 mm / ≈75 mm (manufacturer data)
Connection	Gold-plated pin
Polishing	Alumina with pure water on microcloth for 1–2 minutes; rinse, and if needed ultrasonic cleaning for no more than 5 minutes
Body chemical resistance	Inert to nearly all chemicals and solvents; attacked only by very reactive substances such as elemental alkali metals, elemental fluorine and chlorine trifluoride
Operating temperature	Not specified for this product. One electrode maker recommends 10–25 °C for similar PTFE-body disk electrodes; a body expanding with heat can break the seal

Available Options

Diameter	Description
2 mm	Ø2 mm silver disk
3 mm	Ø3 mm silver disk
4 mm	Ø4 mm silver disk
5 mm	Ø5 mm silver disk
6 mm	Ø6 mm silver disk

For sizes and specifications not listed above, you can request a custom quotation through the Quote Form.

Applications

Electrochemical CO₂ reduction (CO₂RR) and CO selectivity studies
Non-aqueous electrolytes made with solvents reported to swell PEEK, such as dichloromethane, DMSO or THF
Routine voltammetry in standard three-electrode glass cells, with the electrode dipped vertically through the lid
Cyanide and sulfide determination
Comparing electrocatalyst surfaces against a flat silver reference surface