TY - JOUR

T1 - PEDOT-supported Pd nanocatalysts - oxidation of formic acid

AU - Nakova, A.

AU - Ilieva, M.

AU - Czibula, C.

AU - Teichert, C.

AU - Tsakova, V.

N1 - Publisher Copyright: © 2021

PY - 2021/4/1

Y1 - 2021/4/1

N2 - Palladium (Pd) nanocatalysts are obtained by electroless deposition of Pd on pre-reduced poly(3,4-ethylenedioxythiophene) (PEDOT) layers doped with either polystyrenesulfonate (PSS) or dodecylsulfate (SDS) ions. The PEDOT-supported Pd catalysts are investigated with respect to formic acid (FA) oxidation in slightly acidic solution under voltammetric and chronoamperometric conditions. Atomic force microscopy (AFM) and Scanning electron microscopy (SEM) studies are carried out before and after exposure to FA. It is established that the dopant used for the synthesis of PEDOT does affect not only the distribution of the Pd nanoparticles on the polymer surface but also the stability of the composites upon electrochemical treatment in the presence of FA. It is found that PEDOT-PSS undergoes structural rearrangement, and significant loss of the Pd catalyst is observed. In comparison, PEDOT-SDS is more resistant to FA exposure since aggregated Pd nanoparticles are providing additional stability of the polymer structure.

AB - Palladium (Pd) nanocatalysts are obtained by electroless deposition of Pd on pre-reduced poly(3,4-ethylenedioxythiophene) (PEDOT) layers doped with either polystyrenesulfonate (PSS) or dodecylsulfate (SDS) ions. The PEDOT-supported Pd catalysts are investigated with respect to formic acid (FA) oxidation in slightly acidic solution under voltammetric and chronoamperometric conditions. Atomic force microscopy (AFM) and Scanning electron microscopy (SEM) studies are carried out before and after exposure to FA. It is established that the dopant used for the synthesis of PEDOT does affect not only the distribution of the Pd nanoparticles on the polymer surface but also the stability of the composites upon electrochemical treatment in the presence of FA. It is found that PEDOT-PSS undergoes structural rearrangement, and significant loss of the Pd catalyst is observed. In comparison, PEDOT-SDS is more resistant to FA exposure since aggregated Pd nanoparticles are providing additional stability of the polymer structure.

KW - Electroless deposition

KW - Formate

KW - Pd catalyst

KW - PEDOT

KW - PEDOT-supported Pd nanocatalysts-

UR - http://www.scopus.com/inward/record.url?scp=85101040975&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2021.137931

DO - 10.1016/j.electacta.2021.137931

M3 - Article

AN - SCOPUS:85101040975

VL - 374.2021

JO - Electrochimica acta

JF - Electrochimica acta

SN - 0013-4686

IS - 1 April

M1 - 137931

ER -