Transient Voltammetry

(Linear) scan, Sweep, Ramp of voltage

\(E(t) = E_0 \pm vt\)

Linear - Scan voltammetry

  • Plot of current vs time

Cyclic voltammetry

  • Cycles back to starting point
  • Reversal time
  • Reversal potential, switching potential
  • Plot of current vs potential

Contains info on:

  • Number if steps (peaks)
  • Character and reversibility (shape)
  • Kinetics and transport (shape, offset)
  • Charge (Integral of peaks)

Ultimate cyclic voltammetry

  • Repeats the cycling until pattern becomes the same

Reversible:

Kinetics is fast, diffusion is slow, transport is slow. Transport limited

Irreversible:

Kinetics limits, diffusion is fast

Quasi-reversible:

Both limits somewhat

Semiintegration

Semiintegration is skipped in this course.

Multiple electron transfers

\(Ni = Ni^{2+} + 2e^-\)

$ 2H_2O = O_2 + 4e^- + 4H^+$

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