posted on 2019-07-30, 19:40authored byMatheus
F. dos Santos, Vera Katic, Pãmyla L. dos Santos, Bruno M. Pires, André L.
B. Formiga, Juliano A. Bonacin
Raman
spectroelectrochemistry is a powerful technique for characterizing
structural changes of materials during electrochemical reactions and
investigating the mechanism of film deposition and adsorption processes
on the surfaces of electrodes. Moreover, in situ measurements enable
identification of catalytic sites and reaction intermediates, which
facilitates the comprehension of reaction mechanisms. The limitations
of this technique include the high-cost and the complexity of the
experimental arrangement required by commercial spectroelectrochemical
cells (SEC). Thus, 3D-printing technology emerges as an excellent
alternative for the production of SEC, with desirable shape, low-cost,
and robustness in a short period of time. In this work, an SEC and
a 3D-printed working electrode were fabricated from acrylonitrile–butadiene–styrene
(ABS) and conductive graphene polylactic acid (PLA) filaments, respectively.
The proposed SEC and the 3D-printed electrode were printed within
3.5 h with an estimated cost of materials of less than US $2. Then,
the 3D-printed SEC and the electrode were used in a study of structural
changes of Prussian blue according to different voltage bias.