Electrocatalytic reduction of dioxygen on PdCu for polymer electrolyte membrane fuel cells

Martínez-Casillas, D.C.; Vázquez-Huerta, Gerardo; Pérez-Robles, J.F.; Solorza‐Feria, O.

doi:10.1016/j.jpowsour.2011.01.050

Cited by 53 publications

(49 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A lower Tafel slope is desirable in order to get a high potential for a high operational current density. Values of the exchange current density in Table I are consistent with values reported for some nanometric PdCu catalyst synthesized by a different technique (10). …”

Section: Figure 2 Sem Micrograph Of Pdcu Catalyst Electrochemical Chsupporting

confidence: 85%

See 1 more Smart Citation

(Student Poster Award Winner) Sonochemical Preparation of PdCu as Oxygen Reduction NanoCatalyst for PEMFC

Martínez-Casillas

Solorza‐Feria

2011

ECS Trans.

View full text Add to dashboard Cite

The sonochemical synthesis of PdCu is presented. The electrocatalyst was characterized by X-ray diffraction (XRD) and scanning electronic microscopy (SEM). The XRD result shows evidence of alloy nanoparticles with 8 nm in average size. SEM image shows regular spherical agglomerates with 50 to 200 nm in size. Its catalytic activity for the oxygen reduction reaction (ORR) was evaluated by cyclic voltammetry (CV) and rotating-disk electrode (RDE) in a 0.5 M H 2 SO 4 at 25 °C. Then the PdCu was tested as cathode in a PEMFC. The electrochemical activity and its performance in the PEM fuel cell were compared with the behavior of palladium. The bimetallic nanocatalyst shows in both cases enhanced activity and performance for the ORR than the Pd alone.

show abstract

Section: Figure 2 Sem Micrograph Of Pdcu Catalyst Electrochemical Chsupporting

confidence: 85%

“…Some recent studies have reported that PdCu, synthesized by different techniques, presents catalytic activity for the ORR in acid media which proceeds through fourelectron pathway preferentially (6)(7)(8)(9)(10). In this work the synthesis of PdCu electrocatalyst by sonochemistry is presented.…”

Section: Introductionmentioning

confidence: 99%

(Student Poster Award Winner) Sonochemical Preparation of PdCu as Oxygen Reduction NanoCatalyst for PEMFC

Martínez-Casillas

Solorza‐Feria

2011

ECS Trans.

View full text Add to dashboard Cite

show abstract

“…A well-defined semicircle at higher frequencies was obtained at each catalyst. The semicircle is associated to a strong reduction reaction that involved a multielectron charge transfer process: the reduction of O 2 to form H 2 O [22]. It was obvious to see that the semicircle for Cu 36 Pt 64 catalyst is lower than other Cu-Pt alloys as well as the commercial Pt/C, revealing its lower charge transfer resistance and higher catalytic activity toward the ORR.…”

Section: Electrochemical Impedance Spectroscopy For Orr Over Cu-pt Almentioning

confidence: 99%

Impact of Cu-Pt nanotubes with a high degree of alloying on electro-catalytic activity toward oxygen reduction reaction

Liu

et al. 2015

Electrochimica Acta

View full text Add to dashboard Cite

“…PdCu bimetallic nanoalloys have been studied towards different catalytic reactions. [3][4][5][6]13,14 Mattei and coworkers 15 reported structural changes upon heating PdCu random nanoalloys embedded in silica, proving the formation of a Pdrich core surrounded by a CuO shell upon heating under an oxidizing atmosphere. They have also observed the Pd migration towards the NP surface upon heating under a reducing atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Charge transfer effects on the chemical reactivity of Pd_xCu_1−xnanoalloys

et al. 2016

View full text Add to dashboard Cite

aThis work reports on the synthesis and characterization of Pd x Cu 1−x (x = 0.7, 0.5 and 0.3) nanoalloys obtained via an eco-friendly chemical reduction method based on ascorbic acid and trisodium citrate.The average size of the quasi-spherical nanoparticles (NPs) obtained by this method was about 4 nm, as observed by TEM. The colloids containing different NPs were then supported on carbon in order to produce powder samples (Pd x Cu 1−x /C) whose electronic and structural properties were probed by different techniques. XRD analysis indicated the formation of crystalline PdCu alloys with a nanoscaled crystallite size. Core-level XPS results provided a fingerprint of a charge transfer process between Pd and Cu and its dependency on the nanoalloy composition. Additionally, it was verified that alloying was able to change the NP's reactivity towards oxidation and reduction. Indeed, the higher the amount of Pd in the nanoalloy, less oxidized are both the Pd and the Cu atoms in the as-prepared samples. Also, in situ XANES experiments during thermal treatment under a reducing atmosphere showed that the temperature required for a complete reduction of the nanoalloys depends on their composition. These results envisage the control at the atomic level of novel catalytic properties of such nanoalloys.

show abstract

Electrocatalytic reduction of dioxygen on PdCu for polymer electrolyte membrane fuel cells

Cited by 53 publications

References 28 publications

(Student Poster Award Winner) Sonochemical Preparation of PdCu as Oxygen Reduction NanoCatalyst for PEMFC

(Student Poster Award Winner) Sonochemical Preparation of PdCu as Oxygen Reduction NanoCatalyst for PEMFC

Impact of Cu-Pt nanotubes with a high degree of alloying on electro-catalytic activity toward oxygen reduction reaction

Charge transfer effects on the chemical reactivity of Pd_xCu_1−xnanoalloys

Contact Info

Product

Resources

About

Electrocatalytic reduction of dioxygen on PdCu for polymer electrolyte membrane fuel cells

Cited by 53 publications

References 28 publications

(Student Poster Award Winner) Sonochemical Preparation of PdCu as Oxygen Reduction NanoCatalyst for PEMFC

(Student Poster Award Winner) Sonochemical Preparation of PdCu as Oxygen Reduction NanoCatalyst for PEMFC

Impact of Cu-Pt nanotubes with a high degree of alloying on electro-catalytic activity toward oxygen reduction reaction

Charge transfer effects on the chemical reactivity of PdxCu1−xnanoalloys

Contact Info

Product

Resources

About

Charge transfer effects on the chemical reactivity of Pd_xCu_1−xnanoalloys