Organic Electrode Reactions - Fundamentals and Applications of Organic Electrochemistry - page 142

5.4.1 Electrodes Modified with
Adsorbants
When the electrode is immersed in a solution
containing redox compounds like flavins and
phenazines, and then pulled up from the
solution, an electrode modified with the redox
compounds is readily obtained. The
modification is not very strong, the durability of
the modified electrode is not great and the
modification density is low. On the other hand,
an electrode modified with strongly adhering
and homogeneous films with redox catalysts
using the Langmuir-Blodgett technique is
superior to an adsorbant-modified electrode
since both the modification density (density of
redox catalyst) and durability of the
Langmuir-Blodgett film modified electrode are
much higher. Based on hydrophilic/
hydrophobic control of the electrode surface
using Langmuir-Blodgett film containing
quaternary ammonium salt, product selectivity
control has been achieved [46].
Langmuir-Blodgett film-coated electrodes also
allow electrocatalytic reactions to be achieved
[47].
5.4.2 Foreign Metal Adatom Modified
Electrodes
Base electrodes can be modified by deposition
of foreign metal adatoms at potentials several
hundred millivolts positive to the reversible