TY - JOUR
T1 - Electrochemical Nucleation and Growth of Pd-Co Alloy Nanoparticles from the Reline Deep Eutectic Solvent
AU - Landa-Castro, M.
AU - Romero-Romo, M.
AU - Arce-Estrada, E.
AU - Morales-Gil, P.
AU - de Oca-Yemha, M. G.Montes
AU - Palomar-Pardavé, M.
N1 - Publisher Copyright:
© 2022 The Electrochemical Society (“ECS”). Published on behalf of ECS by IOP Publishing Limited.
PY - 2022/9
Y1 - 2022/9
N2 - Electrochemical formation of Pd-Co alloy nanoparticles, PdCoNPs, onto a glassy carbon electrode, GCE, from their metallic precursors dissolved in the reline deep eutectic solvent, is reported for the first time. Potentiodynamic and potentiostatic studies indicated that PdCoNPs were electrodeposited by multiple nucleation of 3D bimetallic centers with mass transferred-controlled growth. Potentiostatic current density transients, j-t, were adequately fitted by a theoretical model that describes the kinetics of nucleation and diffusion-controlled growth of bimetallic phases and the number density of active sites for PdCoNPs nucleation, N 0, and their nucleation frequency, A, was determined as a function of the applied potential. SEM image recorded on the GCE electrodeposited with PdCoNPs showed that sizes and particle number density of these PdCoNPs depend on both the applied potential and the deposition time considered. At −0.42 V and 10 s the PdCoNPs had (30 ± 4) nm as average size and a particle number density of (4.23 ± 0.33) x1010 PdCoNPs cm-2. EDS, XRD and XPS observations indicated the presence of Pd and Co. forming a PdCo alloy as zero and bivalenced oxidation states. GCE/PdCoNPs depict higher mass activity towards FAOR than GCE/PdNPs and other modified electrodes reported in the literature where the electrocatalysts were synthesized by different means.
AB - Electrochemical formation of Pd-Co alloy nanoparticles, PdCoNPs, onto a glassy carbon electrode, GCE, from their metallic precursors dissolved in the reline deep eutectic solvent, is reported for the first time. Potentiodynamic and potentiostatic studies indicated that PdCoNPs were electrodeposited by multiple nucleation of 3D bimetallic centers with mass transferred-controlled growth. Potentiostatic current density transients, j-t, were adequately fitted by a theoretical model that describes the kinetics of nucleation and diffusion-controlled growth of bimetallic phases and the number density of active sites for PdCoNPs nucleation, N 0, and their nucleation frequency, A, was determined as a function of the applied potential. SEM image recorded on the GCE electrodeposited with PdCoNPs showed that sizes and particle number density of these PdCoNPs depend on both the applied potential and the deposition time considered. At −0.42 V and 10 s the PdCoNPs had (30 ± 4) nm as average size and a particle number density of (4.23 ± 0.33) x1010 PdCoNPs cm-2. EDS, XRD and XPS observations indicated the presence of Pd and Co. forming a PdCo alloy as zero and bivalenced oxidation states. GCE/PdCoNPs depict higher mass activity towards FAOR than GCE/PdNPs and other modified electrodes reported in the literature where the electrocatalysts were synthesized by different means.
UR - http://www.scopus.com/inward/record.url?scp=85139942272&partnerID=8YFLogxK
U2 - 10.1149/1945-7111/ac91fa
DO - 10.1149/1945-7111/ac91fa
M3 - Artículo
AN - SCOPUS:85139942272
SN - 0013-4651
VL - 169
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 9
M1 - 092521
ER -