The active tip of the electrode is a flat disk made of 99.99% pure platinum. Platinum is a material used in surface electrochemistry: its distinct hydrogen adsorption wave makes it easy to follow the state of the surface by voltammetry. It serves as a comparison surface in electrocatalysis tests and is used to detect hydrogen peroxide and oxidants. Since hydrogen evolution starts at a low overpotential, the negative limit in aqueous media comes earlier than on carbon electrodes.

This version has a T-shaped PTFE body: the lower part is a wider cylinder, with the platinum disk on its end face. The T type is chosen to fit the body size required by specific cells or holders. Disk diameters: Ø0.5–6 mm. PTFE is inert to nearly all chemicals but soft. Straight, L-shaped and PEEK T-type versions are separate products.

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
99.99% pure platinum disk
T-shaped body: the lower section of the straight body is a wider cylinder; the disk sits on its end face
Distinct hydrogen adsorption wave: a reference surface for checking surface area and cleanliness
Polishing with 1 µm diamond and 0.05 µm alumina, or electrochemical cleaning by potential cycling
Disk diameter options Ø0.5, 1, 2, 3, 4, 5 and 6 mm
Body length 60 mm, total length ≈75 mm (manufacturer data); gold-plated contact pin at the tail

Technical Specifications

Electrode type	Platinum disk working electrode
Electrode shape	T-shaped; lower body section is a wider cylinder, disk on its end face
Body material	PTFE (polytetrafluoroethylene)
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	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
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

Hydrogen adsorption/desorption and platinum surface electrochemistry
Measurements in strongly acidic electrolytes that damage PEEK, such as concentrated sulfuric acid
Voltammetry and impedance measurements in cells and holders designed for the T-shaped body
Electrocatalysis tests using Pt as a reference surface for hydrogen evolution and oxygen reduction
Electrochemical detection of hydrogen peroxide (H₂O₂) and oxidants