In situ XRD characterization of hydrogen desorption from electrochemically deposited Pd coating

Borgese, Laura; Zanola, Paolo; Bontempi, Elza; Rossi, Diego; Depero, Laura E.

doi:10.1007/s11998-010-9253-6

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…By controlling the potential or current density of an electrochemical cell, deposition occurs from an oxidized form in solution to a metallic state at the surface. The most straightforward is the synthesis of interstitial hydrides, such as palladium hydride by using various electrochemical baths …”

Section: Synthetic Routesmentioning

confidence: 99%

“…The most straightforward is the synthesis of interstitial hydrides, such as palladium hydride by using various electrochemical baths. 244 The synthesis of Mg NPs has also been reported through the electrochemical reduction of organomagnesium compounds. Haas and Gedanken proposed a sono-electrochemical synthetic approach to prepare 4 nm magnesium NPs deposited at the tip of a sonicating probe with ethyl-and butylmagnesium chloride as magnesium precursors.…”

Section: Thin Film Synthesesmentioning

confidence: 99%

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Nanostructured Metal Hydrides for Hydrogen Storage

et al. 2018

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Knowledge and foundational understanding of phenomena associated with the behavior of materials at the nanoscale is one of the key scientific challenges toward a sustainable energy future. Size reduction from bulk to the nanoscale leads to a variety of exciting and anomalous phenomena due to enhanced surface-to-volume ratio, reduced transport length, and tunable nanointerfaces. Nanostructured metal hydrides are an important class of materials with significant potential for energy storage applications. Hydrogen storage in nanoscale metal hydrides has been recognized as a potentially transformative technology, and the field is now growing steadily due to the ability to tune the material properties more independently and drastically compared to those of their bulk counterparts. The numerous advantages of nanostructured metal hydrides compared to bulk include improved reversibility, altered heats of hydrogen absorption/desorption, nanointerfacial reaction pathways with faster rates, and new surface states capable of activating chemical bonds. This review aims to summarize the progress to date in the area of nanostructured metal hydrides and intends to understand and explain the underpinnings of the innovative concepts and strategies developed over the past decade to tune the thermodynamics and kinetics of hydrogen storage reactions. These recent achievements have the potential to propel further the prospects of tuning the hydride properties at nanoscale, with several promising directions and strategies that could lead to the next generation of solid-state materials for hydrogen storage applications.

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Section: Synthetic Routesmentioning

confidence: 99%

Section: Thin Film Synthesesmentioning

confidence: 99%

Nanostructured Metal Hydrides for Hydrogen Storage

et al. 2018

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“…This mechanism is reversible, in the air is observed the hydrogen desorpion from palladium. The conductance of metallic palladium is higher than palladium hydride conductance and therefore creation of PdH x results in resistance increase [17][18][19][20].…”

Section: C-pd Films As Hydrogen Sensorsmentioning

confidence: 99%

Carbon-palladium films as gas sensors (hydrogen, ammonia, methane)

2014

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In this paper we present the results of the resistances changes of carbon-palladium films under the influences of gas like hydrogen, ammonia and methane. Our research has shown that carbon-palladium films (C-Pd films) according to the form and the structure in which they appear, they can respond to a variety of gases. The C-Pd film obtained by Physical Vapor Deposition (PVD) method is sensitive to hydrogen and do not respond to the ammonia. Thermal modification of the C-Pd film in Chemical Vapor Deposition (CVD) process affects the morphology of the film, increases its resistance and it causes that this film begins to react to the ammonia. This change causes that this film stops responding on hydrogen. Film sensitive to methane was obtained by changing the technology conditions of the PVD process. The reaction of C-Pd film on the hydrogen and the ammonia is increase resistance, while film sensitive to methane reacts by decrease of initial resistance value. In both cases, the changes are reversible after cleaning by air atmosphere. Different varieties of C-Pd films can be used to build selective sensors for hydrogen, ammonia and methane.

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“…Furthermore, recent research has demonstrated that in situ x-ray diffraction can be utilized to monitor hydrogen absorption and release in nano-sized Pd crystals. By observing dynamic phase transitions, researchers can gain valuable insights into the behavior of hydrogen in these materials, which is crucial for understanding their applications in various fields [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Hydride formation and dynamic phase changes during template-assisted Pd electrodeposition

Abbondanza,

Grespi,

Larsson

et al. 2023

Nanotechnology

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We investigated the structural evolution of electrochemically fabricated Pd nanowires in situ by means of grazing-incidence transmission small- and wide-angle x-ray scattering (GTSAXS and GTWAXS), x-ray fluorescence (XRF) and two-dimensional surface optical reflectance (2D-SOR). This shows how electrodeposition and the hydrogen evolution reaction (HER) compete and interact during Pd electrodepositon. During the bottom-up growth of the nanowires, we show that β-phase Pd hydride is formed. Suspending the electrodeposition then leads to a phase transition from β-phase Pd hydride to α-phase Pd. Additionally, we find that grain coalescence later hinders the incorporation of hydrogen in the Pd unit cell. GTSAXS and 2D-SOR provide complementary information on the volume fraction of the pores occupied by Pd, while XRF was used to monitor the amount of Pd electrodeposited.

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In situ XRD characterization of hydrogen desorption from electrochemically deposited Pd coating

Cited by 8 publications

References 14 publications

Nanostructured Metal Hydrides for Hydrogen Storage

Nanostructured Metal Hydrides for Hydrogen Storage

Carbon-palladium films as gas sensors (hydrogen, ammonia, methane)

Hydride formation and dynamic phase changes during template-assisted Pd electrodeposition

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