Multiple choice

Which of the following is a double working electrode ?

  1. A reference electrode

  2. A reversible hydrogen electrode

  3. A rotating disk electrode

  4. A rotating ring-disk electrode

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A rotating ring-disk electrode (RRDE) is double working electrode used in hydrodynamic voltammetry, very similar to a rotating disk electrode (RDE). The electrode actually rotates during experiments inducing a flux of analyte to the electrode.