Abstract
AbstractFilm electrodes prepared from oppositely charged silicate sub‐microparticles and gold nanoparticles were applied for electrocatalysis. Mesoporous silicate sub‐microparticles with sulfonate functionalities were prepared by the sol–gel method. They were immobilized on an indium tin oxide film surface together with imidazolium‐functionalized gold nanoparticles by the layer‐by‐layer method, that is, alternating immersion into their suspensions. As shown by scanning electron microscopy, the deposited silicate sub‐microparticles were covered by gold nanoparticles. The nanoparticulate film was found to be stable, and its electroactive surface was determined to be significantly larger than that of the electrode substrate. It exhibited some cation accumulation behavior. After activation, a gold–ceramic nanoparticulate electrode exhibited catalytic properties towards the reduction dioxygen and the oxidation of hydrazine, SO32−, and NO2−.
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