Chemistry Reference
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Figure 3.6 Setup for constant potential
electrolysis
3.3 Direct Electrolysis and
Indirect Electrolysis
Electrolysis is classified as direct electrolysis or
indirect electrolysis. The former is based on
direct electron transfer between substrate
molecule and electrode, which is a simple and
common electrolytic method. The latter is
based on electron transfer using redox
mediators dissolved in an electrolytic solvent,
as shown in Figure 3.7 (indirect cathodic
reduction). (Note that indirect anodic oxidation
is covered in Chapter 2 , Figure 2.9 .) Indirect
electrolysis is also classified into in-cell, where
electrolysis is carried out in the presence of
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