Measurements take place on a 99.99% pure platinum disk embedded in an insulating body. Showing a clear hydrogen adsorption wave in cyclic voltammetry, platinum is a convenient reference surface for checking surface cleanliness and active area. It is preferred for studying hydrogen evolution and oxygen reduction, and for detecting hydrogen peroxide. Its negative range is narrower than carbon's because hydrogen evolution starts early.

In the L-shaped body the rod ends in a short perpendicular head; the platinum 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: Ø0.5–6 mm. The rigid PEEK body withstands mechanical stress. Straight, T-shaped and PTFE L-type versions are separate products.

Key Features

99.99% pure platinum disk
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 Ø0.5, 1, 2, 3, 4, 5 and 6 mm
Distinct hydrogen adsorption wave: a reference surface for checking surface area and cleanliness
Body length 60 mm, total length ≈75 mm (manufacturer data); gold-plated contact pin at the tail
Polishing with 1 µm diamond and 0.05 µm alumina, or electrochemical cleaning by potential cycling

Technical Specifications

Electrode type	Platinum 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	Platinum, 99.99%
Disk diameter	0.5, 1, 2, 3, 4, 5, 6 mm
Body / total length	60 mm / ≈75 mm (manufacturer data)
Connection	Gold-plated pin
Potential window (aqueous)	Negative limit set by hydrogen evolution (low overpotential), positive limit by oxygen evolution; values depend on electrolyte and pH
Polishing	1 µm diamond slurry on a nylon pad, then alumina on microcloth (final step 0.05 µm); rinse with pure water
Electrochemical cleaning	As an alternative to polishing, by potential cycling in a suitable electrolyte
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
0.5 mm	Ø0.5 mm platinum disk
1 mm	Ø1 mm platinum disk
2 mm	Ø2 mm platinum disk
3 mm	Ø3 mm platinum disk
4 mm	Ø4 mm platinum disk
5 mm	Ø5 mm platinum disk
6 mm	Ø6 mm platinum 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
Hydrogen adsorption/desorption and platinum surface electrochemistry
Electrocatalysis tests using Pt as a reference surface for hydrogen evolution and oxygen reduction
Electrochemical detection of hydrogen peroxide (H₂O₂) and oxidants
Setups where the electrode is frequently removed and refitted and the body is under mechanical stress