Diffraction line profiles of spherical hollow nanocrystals

Burresi, Emiliano; Tapfer, L.

doi:10.1177/1847980419832386

Cited by 7 publications

(6 citation statements)

References 26 publications

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“…The PdH x -β-shell thickening (possibly interpreted as a coherent hollow nanoparticle of decreasing inner void sizes) "seen" as a solid particle of constant diameter by the Rietveld analysis of the WAXS pattern is supported by Burresi et al's recent work. 31 A slight increase of the PdH x -β size and slight growth of the PdH x -α size are observed during the early stage of PdH x α → β transition. An excess of the PdH x -β size appears only during PdH x β → α transition.…”

Section: ■ Results and Discussionmentioning

confidence: 91%

Electrochemical Strain Dynamics in Noble Metal Nanocatalysts

et al. 2021

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The theoretical design of effective metal electrocatalysts for energy conversion and storage devices relies greatly on supposed unilateral effects of catalysts structure on electrocatalyzed reactions. Here, by using high-energy X-ray diffraction from the new Extremely Brilliant Source of the European Synchrotron Radiation Facility (ESRF-EBS) on device-relevant Pd and Pt nanocatalysts during cyclic voltammetry experiments in liquid electrolytes, we reveal the near ubiquitous feedback from various electrochemical processes on nanocatalyst strain. Beyond challenging and extending the current understanding of practical nanocatalysts behavior in electrochemical environment, the reported electrochemical strain provides experimental access to nanocatalysts absorption and adsorption trends (i.e., reactivity and stability descriptors) operando. The ease and power in monitoring such key catalyst properties at new and future beamlines is foreseen to provide a discovery platform toward the study of nanocatalysts encompassing a large variety of applications, from model environments to the device level.

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Section: ■ Results and Discussionmentioning

confidence: 91%

Electrochemical Strain Dynamics in Noble Metal Nanocatalysts

et al. 2021

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“…, where R (D = 2R) and t are the particle radius and shell thickness, respectively [44]. Using this formalism and considering R = 81 nm (from TEM analysis) the gold thickness was estimated in ~ 3 nm in good agreement with the Au nanoshell thickness from TEM measurements.…”

Section: Resultsmentioning

confidence: 54%

Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties

et al. 2021

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We describe a simple method for the preparation of gold-decorated silica (SiO2) nanoparticles (NPs) by the in situ precipitation method using simple BH4− ions reduction as a procedure, where BH4− ions are adsorbed onto PEI-functionalized SiO2 NPs for stabilizing and reducing gold ions onto PEI-SiO2 surface in water under ambient conditions. The result was 3-nm gold nanoshell NPs attached to SiO2 core (~ 75 nm) with a surface plasmon resonance (SPR) at ~ 680 nm. SPR band is associated with Au NP aggregates that arise from strong interparticle interaction. This is an alternative to the gold-seeding methods and the use of anionic gold species for the obtention of gold-decorated SiO2 NPs with an important red-shift in UV–Vis absorption and with potential applications in biosensors and photothermal therapy.

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“…This suggests that the core-shell evolution of the phase transitions observed in the gas phase for fine Pd nanoparticles (<10 nm) 18,21 is also valid in electrochemical environment. The PdHx--shell thickening (possibly interpreted as a coherent hollow nanoparticle of decreasing inner void sizes) 'seen' as a solid particle of constant diameter by the Rietveld analysis of the WAXS pattern is supported by Burresi et al recent work 41 . A slight increase of the PdHx-size and slight growth of the PdHx-size are observed during the early stage of PdHx →…”

Section: Textmentioning

confidence: 63%

Electrochemical feedback on strain dynamics in noble metal nanocatalysts

Chattot

Martens

Mirolo

et al. 2021

Preprint

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The theoretical design of effective metal electrocatalysts for energy conversion and storage devices relies on the structure sensitivity of electrochemical processes to their catalyst materials, assuming the structural integrity during operation. However, theoretical predictions do not necessarily match practical performance. Here, by using high-energy X-ray diffraction from the new Extremely Brilliant Source of the European Radiation Synchrotron Facility (ESRF-EBS) on device-relevant Pd and Pt nanocatalysts during cyclic voltammetry experiments in liquid electrolyte, we quantitatively reveal how different electrochemical processes permanently affect the bulk microstructure of nanocatalysts in a distinctive fashion. The reported structural insights provide experimental access to reactivity descriptors such as adsorption and absorption trends operando. The ease and power of such an experimental approach at new and future beamlines is foreseen to guide computational model description of practical nanomaterials in electrochemical environment while providing a discovery platform toward the study of nanocatalysts encompassing a large variety of applications.

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Diffraction line profiles of spherical hollow nanocrystals

Cited by 7 publications

References 26 publications

Electrochemical Strain Dynamics in Noble Metal Nanocatalysts

Electrochemical Strain Dynamics in Noble Metal Nanocatalysts

Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties

Electrochemical feedback on strain dynamics in noble metal nanocatalysts

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