Electrochemical nucleation and growth of Pd/PdCo core–shell nanoparticles with enhanced activity and durability as fuel cell catalyst

Rezaei, Milad; Tabaian, Seyed Hadi; Haghshenas, Davoud Fatmehsari

doi:10.1039/c3ta15220k

Cited by 49 publications

(29 citation statements)

References 44 publications

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“…In the case of Cu and brass, two peaks appear in voltammograms which are associated to the Fe and Pd reduction [16]. The first peak in voltammograms is related to palladium diffusion-controlled region and next one to iron [33][34][35][36]. It is also found that for same overpotentials (Fig.…”

Section: Effect Of Substrate On Chemical Composition and Cathodic Curmentioning

confidence: 71%

Electrochemical Behavior of Nanostructured Fe-Pd Alloy During Electrodeposition on Different Substrates

Rezaei

Haghshenas

Ghorbani

et al. 2018

J. Electrochem. Sci. Technol

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In this work, Fe-Pd alloy films have been electrodeposited on different substrates using an electrolyte containing [Pd(NH 3) 4 ] 2 + (0.02 M) and [Fe-Citrate] 2 + (0.2 M). The influences of substrate and overpotential on chemical composition, nucleation and growth kinetics as well as the electrodeposited films morphology have been investigated using energy dispersive X-ray spectroscopy (EDS), current-time transients, scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray diffraction (XRD) patterns. In all substrates-brass, copper and sputtered fluorine doped tin oxide on glass (FTO/glass)-Fe content of the electrodeposited alloys increases by increasing the overpotential. Also the cathodic current efficiency is low due to high rate of H 2 co-reduction. Regarding the chronoamperometry current-time transients, it has been demonstrated that the nucleation mechanism is instantaneous with a typical three dimensional (3D) diffusion-controlled growth in the case of brass and copper substrates; while for FTO, the growth mode changes to 3D progressive. At a constant overpotential, the calculated number of active nucleation sites for metallic substrates is much higher than that of FTO/glass; however by increasing the overpotential, the number of active nucleation sites increases. The SEM micrographs as well as the XRD patterns reveal the formation of Fe-Pd alloy thin films with nanostructure arrangement and ultrafine grains.

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Section: Effect Of Substrate On Chemical Composition and Cathodic Curmentioning

confidence: 71%

Electrochemical Behavior of Nanostructured Fe-Pd Alloy During Electrodeposition on Different Substrates

Rezaei

Haghshenas

Ghorbani

et al. 2018

J. Electrochem. Sci. Technol

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“…This led to the contraction of the Pd lattice along with the modication of the Pd electronic structure. [48][49][50][51] H 2 -TPR proles of PdM@Hal are given in Fig. 4b.…”

Section: Resultsmentioning

confidence: 99%

Natural clay-supported palladium catalysts for methane oxidation reaction: effect of alloying

et al. 2019

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“…Pd-based catalysts are believed to be more suitable for FAO due to their lower adsorption of CO intermediates in catalyzing formic acid. [5][6][7] Nevertheless, the electrochemical activity and stability of Pd-based catalysts should be improved. Increasing the activity of Pd-based catalysts will lead to a low dosage of Pd in practical utilization.…”

Section: Introductionmentioning

confidence: 99%

Palladium–nickel catalysts based on ordered titanium dioxide nanorod arrays with high catalytic peformance for formic acid electro-oxidation

Jiang

Zhao

et al. 2017

RSC Adv.

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Electrochemical nucleation and growth of Pd/PdCo core–shell nanoparticles with enhanced activity and durability as fuel cell catalyst

Abstract: Cyclic voltammetry curves of Pd NPs and Pd/PdCo core–shell NPs in 0.5 M HCOOH + 0.5 M H2SO4.

Cited by 49 publications

References 44 publications

Electrochemical Behavior of Nanostructured Fe-Pd Alloy During Electrodeposition on Different Substrates

Electrochemical Behavior of Nanostructured Fe-Pd Alloy During Electrodeposition on Different Substrates

Natural clay-supported palladium catalysts for methane oxidation reaction: effect of alloying

Palladium–nickel catalysts based on ordered titanium dioxide nanorod arrays with high catalytic peformance for formic acid electro-oxidation

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