Measurements take place on a flat silver disk embedded in an insulating body. In CO₂ reduction (CO₂RR) research, silver stands out for producing carbon monoxide (CO) with high selectivity; a flat silver disk gives a well-defined surface for comparison with powder catalysts. On the analytical side, it is used for cyanide and sulfide determination.

In the L-shaped body the rod ends in a short perpendicular head; the silver disk is on its end face and faces sideways, 90° to the body. The disk can thus face, and sit close to, an optical window, a light source or the reference electrode. Disk diameters: Ø2–6 mm. The rigid PEEK body withstands mechanical stress. Straight, T-shaped and PTFE L-type versions are separate products.

Key Features

Silver disk: a catalyst surface with high CO selectivity in CO₂ reduction
L-shaped body: the disk is on the end face of a short perpendicular head; the surface faces sideways, 90° to the body axis
PEEK body: hard and rigid (Shore D ≈ 85) and resistant to creep under load; not for use with concentrated sulfuric or nitric acid
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	L-shaped; disk on the end face of a short perpendicular head (faces sideways, 90° to the body)
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

Cells with an optical window such as in-situ Raman cells: the disk faces the window and sits close to it
Photoelectrochemistry setups: the disk surface can be turned toward the light source
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