Activated Porous Highly Enriched Platinum and Palladium Electrocatalysts from Dealloyed Noncrystalline Alloys for Enhanced Hydrogen Evolution

Sahu, Arti; Mondal, K.; Pala, Raj Ganesh S.

doi:10.1002/celc.202001230

Cited by 12 publications

(3 citation statements)

References 51 publications

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“…RHE at a scan rate of 5 mV s -1 . 87 According to Pourbaix diagrams, 88 the oxidation current between 0.2 V and 0.7 V refers to the dissolution of Zr from the PtZr 4 /PdZr 3 electrode to the electrolyte solution. For PtZr 4 (Fig.…”

Section: Hydrogen Sorption Of Pd-based Mgs Via Electrochemistrymentioning

confidence: 99%

Pd-based Metallic Glasses as Promising Materials for Hydrogen Energy Applications

Sarac

Eckert

2023

J. Electrochem. Soc.

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Hydrogen storage and production via electrochemistry using advanced amorphous metal catalysts with enhanced performance, cost, and durability may offer dynamic and intermittent power generation opportunities. As a new sub-class of materials, Pd-based metallic-glasses (MGs) have drawn intense attention because of their grain-free, randomly packed atomic structure with intrinsic chemical heterogeneity, bestowing unique physical, structural, and chemical properties for energy applications. Wee first give a general introduction to Pd and Pd-based MGs, including the fabrication techniques of MGs and their hydrogen applications. We then cover hydrogen sorption of Pd-based MGs examined under ribbons, nanowires/microrods, and thin-films subsections. Hydrogen evolution via Pd-based MGs is then analyzed under the bulk rod, ribbons, and thin-films subsections and hydrogenation kinetics and sensing, pseudocapacitance, and electron transfer kinetics subsections are discussed. Finally, a broad summary of Pd-based metallic glasses and future prospects. Altogether, this review provides a thorough and inspirational overview of hydrogen sorption and evolution of Pd-based MGs targeted for future large-scale hydrogen energy storage and production systems.

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Section: Hydrogen Sorption Of Pd-based Mgs Via Electrochemistrymentioning

confidence: 99%

Pd-based Metallic Glasses as Promising Materials for Hydrogen Energy Applications

Sarac

Eckert

2023

J. Electrochem. Soc.

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“…The synthesis of palladium electrocatalysts by means of selective dissolution used for anodic oxidation of hydrogen or organic compounds, as well as cathodic oxygen reduction, is of great interest when used for the design of fuel cells, hydrogen accumulators and electrochemical sensors [ 4 , 5 , 6 ]. A highly porous and stable electrocatalyst with relatively high specific activity of hydrogen evolution reaction was designed in [ 7 , 8 ] by means of selective electrochemical dissolution of Zr from quasi-crystalline PdZr 3 metallic glasses and nickel from Pd–Ni films. The dealuminified PdCuAl alloys and palladium deposited on the dealloyed Au 50 Ag 50 nanoporous structure proved to be very effective in catalysing oxygen reduction [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Phase Transformation during the Selective Dissolution of a Cu85Pd15 Alloy: Nucleation Kinetics and Contribution to Electrocatalytic Activity

2023

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This study determined the critical parameters for the morphological development of the electrode surface (the critical potential and the critical charge) during anodic selective dissolution of a Cu–Pd alloy with a volume concentration of 15 at.% palladium. When the critical values were exceeded, a phase transition occurred with the formation of palladium’s own phase. Chronoamperometry aided in the determination of the partial rates of copper ionization and phase transformation of palladium under overcritical selective dissolution conditions. The study determined that the formation of a new palladium phase is controlled by a surface diffusion of the ad-atom to the growing three-dimensional nucleus under instantaneous activation of the nucleation centres. We also identified the role of this process in the formation of the electrocatalytic activity of the anodically modified alloy during electro-oxidation of formic acid. This study demonstrated that HCOOH is only oxidated at a relatively high rate on the surface of the Cu85Pd15 alloy, which is subjected to selective dissolution under overcritical conditions. This can be explained by the fact that during selective dissolution of the alloy, a pure palladium phase is formed on its highly developed surface which has prominent catalytic activity towards the electro-oxidation of formic acid. The rate of electro-oxidation of HCOOH on the surface of the anodically modified alloy increased with the growth of the potential and the charge of selective dissolution, which can be used to obtain an electrode palladium electrocatalyst with a set level of electrocatalytic activity towards the anodic oxidation of formic acid.

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“…11,12 Hence, these materials have been suggested as green energy materials for hydrogen storage and production. 13–33…”

Section: Introductionmentioning

confidence: 99%

Synergistic enhancement of hydrogen interactions in palladium–silicon–gold metallic glass with multilayered graphene

Sarac¹,

Ivanov²,

Pütz³

et al. 2023

J. Mater. Chem. A

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Activated Porous Highly Enriched Platinum and Palladium Electrocatalysts from Dealloyed Noncrystalline Alloys for Enhanced Hydrogen Evolution

Cited by 12 publications

References 51 publications

Pd-based Metallic Glasses as Promising Materials for Hydrogen Energy Applications

Pd-based Metallic Glasses as Promising Materials for Hydrogen Energy Applications

Phase Transformation during the Selective Dissolution of a Cu85Pd15 Alloy: Nucleation Kinetics and Contribution to Electrocatalytic Activity

Synergistic enhancement of hydrogen interactions in palladium–silicon–gold metallic glass with multilayered graphene

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