TY - JOUR
T1 - Formic acid oxidation on AuPd core-shell electrocatalysts
T2 - Effect of surface electronic structure
AU - Romero Hernández, A.
AU - Arce Estrada, E. M.
AU - Ezeta, A.
AU - Manríquez, M. E.
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/12/10
Y1 - 2019/12/10
N2 - AuPd core-shell electrocatalysts were synthesized with cubic, cuboctahedric and octahedral shapes to study the electronic effects of these nanostructures on the formic acid oxidation reaction, FAOR. The morphology and the surface electronic structure of the different AuPd core-shell were examined by high-resolution transmission electron microscopy, HRTEM, and X-ray photoelectron spectroscopy, XPS, respectively. The FAOR was analyzed by the binding energy of the d-band center of each core-shell nanostructure and its electrocatalytic behavior. The octahedron shape presents better affinity for the CO adsorption-desorption processes and higher overpotentials than the other electrocatalyst. Therefore, the FAOR indirect route is encouraged. Contrariwise, the cubic nanostructure favors the FAOR direct route due to its exchange current density of 1.741 mA cm−2 that suggest a fast kinetic associated with the lowest d-band binding energy among all the core-shell nanostructures.
AB - AuPd core-shell electrocatalysts were synthesized with cubic, cuboctahedric and octahedral shapes to study the electronic effects of these nanostructures on the formic acid oxidation reaction, FAOR. The morphology and the surface electronic structure of the different AuPd core-shell were examined by high-resolution transmission electron microscopy, HRTEM, and X-ray photoelectron spectroscopy, XPS, respectively. The FAOR was analyzed by the binding energy of the d-band center of each core-shell nanostructure and its electrocatalytic behavior. The octahedron shape presents better affinity for the CO adsorption-desorption processes and higher overpotentials than the other electrocatalyst. Therefore, the FAOR indirect route is encouraged. Contrariwise, the cubic nanostructure favors the FAOR direct route due to its exchange current density of 1.741 mA cm−2 that suggest a fast kinetic associated with the lowest d-band binding energy among all the core-shell nanostructures.
KW - Core-shell nanostructures
KW - D-band center
KW - Electrocatalysis
KW - FAOR
UR - http://www.scopus.com/inward/record.url?scp=85073366801&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2019.134977
DO - 10.1016/j.electacta.2019.134977
M3 - Artículo
AN - SCOPUS:85073366801
SN - 0013-4686
VL - 327
JO - Electrochimica Acta
JF - Electrochimica Acta
M1 - 134977
ER -