Measurements take place on a flat silver disk embedded in an insulating 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 is the standard straight type: the silver disk sits at the tip, in line with the PEEK rod, and the electrode is dipped vertically through the cell lid. Disk diameters: Ø2–6 mm. PEEK is hard and rigid and keeps its shape when the electrode is often refitted, but concentrated sulfuric and nitric acid damage it. L- and T-shaped types and a PTFE version are separate products.

Key Features

Standard straight body: the disk sits on the end face, in line with the rod; the electrode is dipped vertically into the cell
PEEK body: hard and rigid (Shore D ≈ 85) and resistant to creep under load; not for use with concentrated sulfuric or nitric acid
Silver disk: a catalyst surface with high CO selectivity in CO₂ reduction
Disk diameter options Ø2, 3, 4, 5 and 6 mm
Suitable for analytical applications such as cyanide and sulfide determination
Body length 60 mm, total length ≈75 mm (manufacturer data); gold-plated contact pin at the tail
Easy surface renewal with a 1–2 minute alumina polish

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	PEEK (polyether ether ketone)
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	Resistant to most aqueous and organic media; not compatible with concentrated sulfuric acid, concentrated nitric acid or halogen acids such as HF, HBr, HI
Operating temperature	Not specified for this product. One electrode maker recommends 10–80 °C for similar PEEK-body disk electrodes; extreme temperatures can damage the disk–body 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

Routine voltammetry in standard three-electrode glass cells, with the electrode dipped vertically through the lid
Electrochemical CO₂ reduction (CO₂RR) and CO selectivity studies
Cyanide and sulfide determination
Comparing electrocatalyst surfaces against a flat silver reference surface
Setups where the electrode is frequently removed and refitted and the body is under mechanical stress