From the chemical perspective, previous works described the in situ electrodeposition of these catalysts on glassy carbon electrodes using metallic salts as precursors.
The electrodeposition processes gave rise to different structures such as nanoparticles or films whose catalytic properties were affected by different parameters including the electrolytic medium, concentration of precursor,
organic additives, pH, or deposition time. In this work, all the applied inorganic catalysts were commercially available and
were readily incorporated in a conductive composite matrix that was used as the electrode material. This composite material could be easily developed onto a conductive substrate in order to prepare the sensor.