TY - JOUR
T1 - Methanol electro-oxidation on carbon-supported Pt and Au@Pt nanoparticles with quasi-spherical and polyhedral forms in acid aqueous medium
AU - Roque-de-la-O, N.
AU - Vázquez-Huerta, G.
AU - Corona-Avendaño, S.
AU - Arce-Estrada, E. M.
AU - Refugio-García, M. E.
AU - Palomar-Pardavé, M.
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2023/11
Y1 - 2023/11
N2 - In this work, monometallic Pt and bimetallic Au@Pt (core-shell) nanoparticles with different shapes are synthesized by adding Ag+ as a shape-modifying agent, polyhedral forms are obtained: Pt0.02 (cubic form), bimetallic Au@Pt0.1 (angulated polyhedral form), and Au@Pt0.2 (polyhedral and cube forms). The nanoparticle’s shape depends on the amount of Ag+ used during synthesis (subindex indicates the Ag/Pt ratio in all cases). Without Ag+, quasi-spherical Pt and Au@Pt nanoparticles are obtained. The polyhedral and angulated shapes of Pt0.02/C and Au@Pt0.1/C are more active for methanol oxidation (0.5 M methanol + 0.5 M H2SO4), in comparison with the quasi-spherical Pt/C, Au@Pt/C and polyhedral/cubic Au@Pt0.2/C nanoparticles. From these results, it is found that the electrochemical response of the tested catalysts varies not only due to the nature of the electrocatalyst (Pt/C or Au@Pt/C) but on the nanoparticle’s shape which is also associated with the dominant crystal plane on their surfaces.
AB - In this work, monometallic Pt and bimetallic Au@Pt (core-shell) nanoparticles with different shapes are synthesized by adding Ag+ as a shape-modifying agent, polyhedral forms are obtained: Pt0.02 (cubic form), bimetallic Au@Pt0.1 (angulated polyhedral form), and Au@Pt0.2 (polyhedral and cube forms). The nanoparticle’s shape depends on the amount of Ag+ used during synthesis (subindex indicates the Ag/Pt ratio in all cases). Without Ag+, quasi-spherical Pt and Au@Pt nanoparticles are obtained. The polyhedral and angulated shapes of Pt0.02/C and Au@Pt0.1/C are more active for methanol oxidation (0.5 M methanol + 0.5 M H2SO4), in comparison with the quasi-spherical Pt/C, Au@Pt/C and polyhedral/cubic Au@Pt0.2/C nanoparticles. From these results, it is found that the electrochemical response of the tested catalysts varies not only due to the nature of the electrocatalyst (Pt/C or Au@Pt/C) but on the nanoparticle’s shape which is also associated with the dominant crystal plane on their surfaces.
KW - Au@Pt/C
KW - Methanol oxidation
KW - Pt/C
KW - Shaped nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85161071530&partnerID=8YFLogxK
U2 - 10.1007/s10008-023-05564-0
DO - 10.1007/s10008-023-05564-0
M3 - Artículo
AN - SCOPUS:85161071530
SN - 1432-8488
VL - 27
SP - 2927
EP - 2936
JO - Journal of Solid State Electrochemistry
JF - Journal of Solid State Electrochemistry
IS - 11
ER -