Pd-modified PEDOT layers obtained through electroless metal deposition—electrooxidation of glycerol

Abstract

Pd-poly(3,4-ethylenedioxythiophene) (PEDOT)-based electrocatalytic materials are obtained by coupling Pd ion reduction with oxidation of pre-reduced PEDOT coatings. Electroless metal deposition is carried out in single or triple electroless deposition steps resulting in Pd NPs with mean size ranging between 12 and 22 nm, respectively. The proposed method of dispersing the Pd catalytic phase provides the opportunity to obtain high electrocatalytic currents with Pd loadings as low as 10 μg cm −2 . The Pd-PEDOT catalyst obtained by triple-step metal deposition shows stable voltammetric behavior with respect to glycerol oxidation in alkaline solution. The established mass activity is between the highest values achieved at Pd-electrocatalysts without involving additional electrocatalytic materials or special supports.

Lignosulfonate-Assisted In Situ Deposition of Palladium Nanoparticles on Carbon Nanotubes for the Electrocatalytic Sensing of Hydrazine

“…Much better results are obtained by dispersing the nanoparticles in some type of matrix. Examples include graphene [38][39][40], metal oxides [41], carbon nanotubes [42][43][44][45], and polymers [46][47][48]. For instance, Promsuwan and colleagues developed an amperometric hydrazine sensor by modifying a glassy carbon electrode with palladium-poly (3,4-ethylene dioxythiophene) coated on carbon microspheres/graphene nanoplatelets (Pd-PEDOT@CM/GNP/GCE) [49].…”