The Effect of Platinum Nanoparticle Distribution on Oxygen Electroreduction Activity and Selectivity

ChemCatChem ◽  
2014 ◽  
pp. n/a-n/a ◽  
Author(s):  
Emiliana Fabbri ◽  
Susan Taylor ◽  
Annett Rabis ◽  
Pieter Levecque ◽  
Olaf Conrad ◽  
...  
Keyword(s):  
Oxygen Electroreduction ◽  
Platinum Nanoparticle ◽  
Nanoparticle Distribution

scholarly journals Inside Cover: The Effect of Platinum Nanoparticle Distribution on Oxygen Electroreduction Activity and Selectivity (ChemCatChem 5/2014)

ChemCatChem ◽  
2014 ◽  
Vol 6 (5) ◽  
pp. 1122-1122 ◽  
Author(s):  
Emiliana Fabbri ◽  
Susan Taylor ◽  
Annett Rabis ◽  
Pieter Levecque ◽  
Olaf Conrad ◽  
...  
Keyword(s):  
Oxygen Electroreduction ◽  
Platinum Nanoparticle ◽  
Nanoparticle Distribution

scholarly journals Fast identification of optimal pure platinum nanoparticle shapes and sizes for efficient oxygen electroreduction

2019 ◽  
Vol 1 (8) ◽  
pp. 2901-2909 ◽  
Author(s):  
Marlon Rück ◽  
Aliaksandr Bandarenka ◽  
Federico Calle-Vallejo ◽  
Alessio Gagliardi
Keyword(s):  
Size Effects ◽  
Oxygen Electroreduction ◽  
Platinum Nanoparticle ◽  
Pure Platinum ◽  
Fast Identification ◽  
Mass Activity ◽  
Nanoparticle Shapes

Unraveling size effects on the mass activity guides chemical routes for synthesis of optimized pure platinum electrocatalysts.

scholarly journals Transmission Electron Microscopy Study on Platinum Nanoparticle Distribution in PEMFC Catalyst Layers under Different Ionomer/Carbon Ratios Fabricated by Direct Dry Deposition

2013 ◽  
Vol 19 (S2) ◽  
pp. 1614-1615
Author(s):  
H. Yu ◽  
J. Roller ◽  
R. Jain ◽  
B. Carter ◽  
R. Maric
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Dry Deposition ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Transmission Electron Microscopy Study ◽  
Platinum Nanoparticle ◽  
Nanoparticle Distribution ◽  
Catalyst Layers ◽  
Transmission Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

Monocytes as Carriers of Magnetic Nanoparticles for Tracking Inflammation in the Epileptic Rat Brain

2019 ◽  
Vol 16 (7) ◽  
pp. 637-644 ◽  
Author(s):  
Hadas Han ◽  
Sara Eyal ◽  
Emma Portnoy ◽  
Aniv Mann ◽  
Miriam Shmuel ◽  
...  
Keyword(s):  
Brain Tissue ◽  
Ex Vivo ◽  
In Vivo Studies ◽  
Nanoparticle Distribution ◽  
Spontaneous Seizures ◽  
Systemic Distribution ◽  
Hippocampal Ca1 ◽  
Pilocarpine Model

Background: Inflammation is a hallmark of epileptogenic brain tissue. Previously, we have shown that inflammation in epilepsy can be delineated using systemically-injected fluorescent and magnetite- laden nanoparticles. Suggested mechanisms included distribution of free nanoparticles across a compromised blood-brain barrier or their transfer by monocytes that infiltrate the epileptic brain. Objective: In the current study, we evaluated monocytes as vehicles that deliver nanoparticles into the epileptic brain. We also assessed the effect of epilepsy on the systemic distribution of nanoparticleloaded monocytes. Methods: The in vitro uptake of 300-nm nanoparticles labeled with magnetite and BODIPY (for optical imaging) was evaluated using rat monocytes and fluorescence detection. For in vivo studies we used the rat lithium-pilocarpine model of temporal lobe epilepsy. In vivo nanoparticle distribution was evaluated using immunohistochemistry. Results: 89% of nanoparticle loading into rat monocytes was accomplished within 8 hours, enabling overnight nanoparticle loading ex vivo. The dose-normalized distribution of nanoparticle-loaded monocytes into the hippocampal CA1 and dentate gyrus of rats with spontaneous seizures was 176-fold and 380-fold higher compared to the free nanoparticles (p<0.05). Seizures were associated with greater nanoparticle accumulation within the liver and the spleen (p<0.05). Conclusion: Nanoparticle-loaded monocytes are attracted to epileptogenic brain tissue and may be used for labeling or targeting it, while significantly reducing the systemic dose of potentially toxic compounds. The effect of seizures on monocyte biodistribution should be further explored to better understand the systemic effects of epilepsy.

High-resolution scanning transmission soft X-ray microscopy for rapid probing of nanoparticle distribution and sufferance features in exposed cells

2015 ◽  
Vol 44 (3) ◽  
pp. 163-168 ◽  
Author(s):  
G. Kourousias ◽  
L. Pascolo ◽  
P. Marmorato ◽  
J. Ponti ◽  
G. Ceccone ◽  
...  
Keyword(s):  
High Resolution ◽  
X Ray ◽  
Nanoparticle Distribution ◽  
Scanning Transmission

scholarly journals Mechanistic Study on Facet-Dependent Deposition of Metal Nanoparticles on Decahedral-Shaped Anatase Titania Photocatalyst Particles

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 542 ◽  
Author(s):  
Kenta Kobayashi ◽  
Mai Takashima ◽  
Mai Takase ◽  
Bunsho Ohtani
Keyword(s):  
Mechanistic Study ◽  
Phase Reaction ◽  
Surface Charges ◽  
Platinum Nanoparticle ◽  
Nanoparticle Deposition ◽  
Selective Reaction ◽  
Anatase Titania ◽  
Deposition Density ◽  
Titania Photocatalyst ◽  
Source Materials

Facet-selective gold or platinum-nanoparticle deposition on decahedral-shaped anatase titania particles (DAPs) exposing {001} and {101} facets via photodeposition (PD) from metal-complex sources was reexamined using DAPs prepared with gas-phase reaction of titanium (IV) chloride and oxygen by quantitatively evaluating the area deposition density on {001} and {101} and comparing with the results of deposition from colloidal metal particles in the dark (CDD) or under photoirradiation (CDL). The observed facet selectivity, more or less {101} preferable, depended mainly on pH of the reaction suspensions and was almost non-selective at low pH regardless of the deposition method, PD or CDL, and the metal-source materials. Based on the results, the present authors propose that facet selectivity is attributable to surface charges (zeta potential) depending on the kind of facets, {001} and {101}, and pH of the reaction mixture and that this concept can explain the observed facet selectivity and possibly the reported facet selectivity without taking into account facet-selective reaction of photoexcited electrons and positive holes on {101} and {001} facets, respectively.

scholarly journals 3D Microprinting of Iron Platinum Nanoparticle‐Based Magnetic Mobile Microrobots

2021 ◽  
Vol 3 (1) ◽  
pp. 2170012
Author(s):  
Joshua Giltinan ◽  
Varun Sridhar ◽  
Ugur Bozuyuk ◽  
Devin Sheehan ◽  
Metin Sitti
Keyword(s):  
Platinum Nanoparticle ◽  
Iron Platinum

Fe–N–C catalysts for oxygen electroreduction under external magnetic fields: Reduction of magnetic O2 to nonmagnetic H2O

2021 ◽  
Author(s):  
Wojciech Kiciński ◽  
Jakub P. Sęk ◽  
Agata Kowalczyk ◽  
Sylwia Turczyniak Surdacka ◽  
Anna M. Nowicka ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Oxygen Electroreduction

scholarly journals Surface Texturing of Polyethylene Terephthalate Induced by Excimer Laser in Silver Nanoparticle Colloids

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3263
Author(s):  
Jakub Siegel ◽  
Tatiana Savenkova ◽  
Jana Pryjmaková ◽  
Petr Slepička ◽  
Miroslav Šlouf ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Polyethylene Terephthalate ◽  
Excimer Laser ◽  
Silver Nanoparticle ◽  
Polymer Surface ◽  
Surface Texturing ◽  
Nanoparticle Distribution ◽  
Pulse Excimer Laser ◽  
Variable Surface ◽  
Variable Morphology

We report on a novel technique of surface texturing of polyethylene terephthalate (PET) foil in the presence of silver nanoparticles (AgNPs). This approach provides a variable surface morphology of PET evenly decorated with AgNPs. Surface texturing occurred in silver nanoparticle colloids of different concentrations under the action of pulse excimer laser. Surface morphology of PET immobilized with AgNPs was observed by AFM and FEGSEM. Atomic concentration of silver was determined by XPS. A presented concentration-controlled procedure of surface texturing of PET in the presence of silver colloids leads to a highly nanoparticle-enriched polymer surface with a variable morphology and uniform nanoparticle distribution.

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