Pt nanoparticles over PEDOT/carbon composites prepared by supercritical carbon dioxide deposition

Bozkurt, Gamze; Memioğlu, Fulya; Bayrakçeken, Ayşe

doi:10.1016/j.apsusc.2014.04.052

Cited by 11 publications

(5 citation statements)

References 17 publications

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“…The multipoint BET surface area of the composite material was 77 m 2 /g. The plain carbon surface area (250 m 2 /g) decreased with the addition of PPy because of blockage of the pores of the carbon with PPy 19. Relat ve Pressure (P/P 0 ) Nitrogen adsorption/desorption isotherms for the composite.…”

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confidence: 99%

Durability of carbon/conducting polymer composite supported Pt catalysts prepared by supercritical carbon dioxide deposition

Bozkurt¹,

Memioğlu²,

Yurtcan³

2016

Turk J Chem

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Polypyrrole (PPy)/carbon (C) composites were synthesized by oxidative chemical polymerization and used as support material for Pt nanoparticles. PPy/C supported Pt nanoparticles were prepared by using a promising catalyst preparation method, supercritical carbon dioxide (scCO 2) deposition. The prepared materials were characterized by using BET, TGA, XRD, and TEM techniques. Cyclic voltammetry was used in order to determine the electrocatalytic activity of the prepared catalyst for hydrogen oxidation and oxygen reduction reactions that occur in proton exchange membrane fuel cells (PEMFCs). The Pt loading obtained over the composite material was around 10%. TEM results showed highly dispersed and small nanoparticles over the composite material by using scCO 2 deposition. Pt dissolution/agglomeration and carbon corrosion tests were applied to the composite supported Pt catalyst in order to determine its durability.

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confidence: 99%

Durability of carbon/conducting polymer composite supported Pt catalysts prepared by supercritical carbon dioxide deposition

Bozkurt¹,

Memioğlu²,

Yurtcan³

2016

Turk J Chem

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“…[147,152] Platinum NPs can be synthesized with relative ease and there are many reports of SFRD of Pt NPs. [67,74,75,113,114,132,[153][154][155][156][157] A summary of the scCO 2 -assisted synthesis of Pt-NPs and their potential use is summarized in Table S4 (Supporting Information). Electrocatalytic application of Pt NPs requires them to be supported on a conductive support such as graphene, CNT, and mesoporous carbon.…”

Section: Platinummentioning

confidence: 99%

Synthesis of Metal Nanostructures Using Supercritical Carbon Dioxide: A Green and Upscalable Process

Siril

Türk

2020

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Metallic nanostructures have numerous applications as industrial catalysts and sensing platforms. Supercritical carbon dioxide (scCO2) is a green medium for the scalable preparation of nanomaterials. Supercritical fluid reactive deposition (SFRD) and other allied techniques can be employed for the mass production of metal nanostructures for various applications. The present article reviews the recent reports on the scCO2‐assisted preparation of zero‐valent metal nanomaterials and their applications. A brief description of the science of pure supercritical fluids, especially CO2, and the basics of binary mixtures composed of scCO2 and a low volatile substance, e.g., an organometallic precursor are presented. The benefits of using scCO2 for preparing metal nanomaterials, especially as a green solvent, are also being highlighted. The experimental conditions that are useful for the tuning of particle properties are reviewed thoroughly. The range of modifications to the classical SFRD methods and the variety of metallic nanomaterials that can be synthesized are reviewed and presented. Finally, the broad ranges of applications that are reported for the metallic nanomaterials that are synthesized using scCO2 are reviewed. A brief summary along with perspectives about future research directions is also presented.

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“…We highlight the previous study by Montes et al, [ 25 ] where PLGA-PEDOT:PSS were investigated in terms of the effect of pressure, temperature and contact time on the porosity, mechanical properties and conductivity of the conjugated polymeric scaffolds. On the other hand, a very limited number of investigations with PEDOT polymer using scCO 2 have been reported in the literature, e.g., CoS/MXene/PEDOT [ 26 ] composites or for the addition of platinum nanoparticles to PEDOT/C matrix [ 27 ]. For instance, the incorporation of PEDOT into PLGA-based scaffolds could introduce electrical conductivity, making them suitable for tissue engineering applications that require electrical stimulation to enhance tissue growth and regeneration [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Supercritical Impregnation of Mangifera indica Leaves Extracts into Porous Conductive PLGA-PEDOT Scaffolds

Valor,

García-Casas,

Montes

et al. 2023

Polymers

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Plant leaves, such as those from Mangifera indica, represent a potential utilization of waste due to their richness in bioactive compounds. Supercritical CO2 allows these compounds to be incorporated into various matrices by impregnation. Combined with its ability to generate polymeric scaffolds, it represents an attractive strategy for the production of biomedical devices. For this purpose, conjugated polymeric scaffolds of biodegradable PLGA (poly(lactic-co-glycolic acid)) and PEDOT:PSS (poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)), generated in situ by foaming, were employed for the supercritical impregnation of ethanolic mango leaves extract (MLE) in tissue engineering as a potential application. The extraction of MLE was performed by Enhanced Solvent Extraction. The effects of pressure (120–300 bar), temperature (35–55 °C), and depressurization rate (1–50 bar/min) on the physical/conductive properties and the impregnation of MLE were studied. The scaffolds have been characterized by liquid displacement, scanning electron microscope, resistance to conductivity techniques, measurements of impregnated load, antioxidant capacity and antimicrobial activity. Porosity values ranging 9–46% and conductivity values between 10−4–10−5 S/cm were obtained. High pressures, low temperatures and rapid depressurization favored the impregnation of bioactive compounds. Scaffolds with remarkable antioxidant activity were obtained (75.2–87.3% oxidation inhibition), demonstrating the ability to inhibit S. aureus bacterial growth (60.1 to 71.4%).

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Pt nanoparticles over PEDOT/carbon composites prepared by supercritical carbon dioxide deposition

Cited by 11 publications

References 17 publications

Durability of carbon/conducting polymer composite supported Pt catalysts prepared by supercritical carbon dioxide deposition

Durability of carbon/conducting polymer composite supported Pt catalysts prepared by supercritical carbon dioxide deposition

Synthesis of Metal Nanostructures Using Supercritical Carbon Dioxide: A Green and Upscalable Process

Supercritical Impregnation of Mangifera indica Leaves Extracts into Porous Conductive PLGA-PEDOT Scaffolds

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