Glassy Carbon - Electrochemical Properties

Electrochemical Properties

Glassy carbon electrode (GCE) in aqueous solutions is considered to be an inert electrode for hydronium ion reduction:

H3O+(aq) + e- H(aq) Eo = −2.10 V versus NHE at 25 °C

Comparable reaction on platinum:

H3O+(aq) + Pt(s) + e- Pt:H(s) Eo = 0.000 V versus NHE at 25 °C

The difference of 2.1 V is attributed to the properties of platinum which stabilizes a covalent Pt-H bond.

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