TY - JOUR
T1 - Surface-enriched Pd/C electrocatalysts with a low load of Pt prepared by surface redox reactions for the oxygen reduction reaction
AU - Tello-Casas, F. F.
AU - Cervantes-Aspeitia, E. Y.
AU - Hernández-Pichardo, M. L.
AU - Tufiño Velázquez, M.
AU - Borja Urby, R.
AU - del Angel, P.
AU - González-Huerta, R. de G.
N1 - Publisher Copyright:
© 2021 Hydrogen Energy Publications LLC
PY - 2021/7/26
Y1 - 2021/7/26
N2 - Pt–Pd/C bimetallic catalysts with low platinum contents were synthesized by surface redox reactions. In this method, hydrogen preadsorbed on the palladium surface of the parent catalyst (Pd/C) acts as a reducer of the PtCl6− species, allowing a selective deposition and closer interaction between both metals (Pt–Pd). The physicochemical study was carried out by XRD, HAADF-STEM, HRTEM, EDS, and electronic interaction between Pt–Pd was characterized by XPS. The electrochemical characterizations by CV, CO stripping, and steady-state LSV toward ORR using RDE indicate that 1%Pt–Pd/C sample exhibited the best results. The present work demonstrates that the selective incorporation of Pt in low quantities on the Pd surface increases the interaction between both metals, producing electronic interactions, synergetic effects, and an enhanced electrocatalytic activity toward the ORR.
AB - Pt–Pd/C bimetallic catalysts with low platinum contents were synthesized by surface redox reactions. In this method, hydrogen preadsorbed on the palladium surface of the parent catalyst (Pd/C) acts as a reducer of the PtCl6− species, allowing a selective deposition and closer interaction between both metals (Pt–Pd). The physicochemical study was carried out by XRD, HAADF-STEM, HRTEM, EDS, and electronic interaction between Pt–Pd was characterized by XPS. The electrochemical characterizations by CV, CO stripping, and steady-state LSV toward ORR using RDE indicate that 1%Pt–Pd/C sample exhibited the best results. The present work demonstrates that the selective incorporation of Pt in low quantities on the Pd surface increases the interaction between both metals, producing electronic interactions, synergetic effects, and an enhanced electrocatalytic activity toward the ORR.
KW - HAADF-STEM
KW - Low Pt load
KW - Oxygen reduction reaction
KW - Pt-Pd/C catalysts
KW - Surface oxide-reduction synthesis
UR - http://www.scopus.com/inward/record.url?scp=85106366971&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2021.03.217
DO - 10.1016/j.ijhydene.2021.03.217
M3 - Artículo
AN - SCOPUS:85106366971
SN - 0360-3199
VL - 46
SP - 26005
EP - 26018
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 51
ER -
