Platinum supported on graphene - PTFE as catalysts for isotopic exchange in a detritiation plant

Vasut, Felicia; Oubraham, Anișoara; Soare, Amalia; Marinoiu, Adriana; Ion-Ebrașu, Daniela; Dragan, Mirela

doi:10.1016/j.fusengdes.2018.12.004

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…Table 1 presents specific surfaces of the prepared samples and the platinum concentrations obtained by atomic sorption. The specific surface areas are quite similar for all 3 samples and shows that including metal atoms through the graphene sheets partially maintains the layer-to-layer stacking of initial porous area of the precursor (GO), (Vasut et al, 2019). The platinum concentration is reduced by half in the case of sample 2, the use of NaBH 4 leading to a product with the similar specific surface area but with lower platinum content.…”

Section: Resultsmentioning

confidence: 82%

“…PLATINUM ON REDUCED GRAPHENE OXIDE NANOSHEETS OBTAINED UNDER MICROWAVE IRRADIATION, USING REDUCING AGENTS Specific surface of GO that was used for producing platinate samples was presented in an earlier paper (Vasut et al, 2019). Table 1 presents specific surfaces of the prepared samples and the platinum concentrations obtained by atomic sorption.…”

Section: Resultsmentioning

confidence: 99%

“…The thermogravimetric analysis (TGA) measurement of the samples was carried out using Netzsch STA 449 F Jupiter Simultaneous Thermal Analyzer. The thermal analysis was carried out in the temperature range of 25÷800°C at a heating rate of 10° C/min under nitrogen flow, (Vasut et al, 2019).…”

Section: Samples Preparation and Methods Of Analysismentioning

confidence: 99%

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Platinum on Reduced Graphene Oxide Nanosheets Obtained Under Microwave Irradiation, Using Reducing Agents

Vasut

Oubraham

Soare

et al. 2022

Smart Energ Sustain Env

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Hydrophobic catalysts used in catalytic detritiation process of heavy water consist of platinum impregnated on charcoal (commercial material) and PTFE. For this type of material, Pt is found as agglomerates leading to an increase of hydrophilicity in the final catalyst and also, to a low number of functional groups for isotopic exchange. Therefore, in order to avoid these drawbacks, another type of platinum-based material was considered, with a higher platinum dispersion which would lead to an increase number of functional groups for the isotopic exchange process. There are different methods to synthesize Pt on graphene composites, but using microwaves involves advantages like fewer stages and shorter time to produce. The obtaining method uses reduction of H2PtCl6 in the presence of ethylene glycol and other reducing agents (NaBH4 and KOH) and graphene oxide suspension. Samples were then microstructurally investigated using SEM, BET, X-ray diffraction, RAMAN and TGA.

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Platinum on Reduced Graphene Oxide Nanosheets Obtained Under Microwave Irradiation, Using Reducing Agents

Vasut

Oubraham

Soare

et al. 2022

Smart Energ Sustain Env

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“…This leads to higher LPCE performance when compared to the traditional Pt/AC catalyst [48]. Vasut et al (2019) also managed to reduce the particle size by using graphene oxide as the support material due to better dispersion of Pt on the support material [58]. By having smaller Pt particle size, the catalyst can increase the active surface area available for catalytic reactions, leading to enhanced reaction kinetics and higher efficiency in the LPCE process.…”

Section: Catalyst Supportmentioning

confidence: 99%

A Mini Review on Liquid Phase Catalytic Exchange for Hydrogen Isotope Separation: Current Status and Future Potential

Mhd Yusof,

Lock,

Abdul Talib

et al. 2024

Sustainability

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Liquid phase catalytic exchange (LPCE) appears a highly promising technology for separating hydrogen isotopes due to being less energy-intensive and having a high separation factor. This paper provides an overview of the current development of the hydrophobic catalysts used in the LPCE process, including the LPCE fundamentals, factors influencing its effectiveness, and proposals for future research areas. This paper specifically reviews the active metal catalysts, catalyst supports, operating temperatures, and molar feed ratio(gas-to-liquid,G/L). The addition of a second metal such as Ir, Fe, Ru, Ni, or Cr and modified catalyst supports showed enhancement of LPCE performance. Additionally, the validated optimized temperature of 60–80 °C and G/L of 1.5–2.5 provide an important basis for designing LPCE systems to improve separation efficiency. This paper concludes by highlighting potential research areas and challenges for future advancements in the sustainability of LPCE for hydrogen isotope separation, which include the optimization, scalability, techno-economic analysis, and life-cycle analysis of modified catalyst materials.

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“…In addition, graphene with a two-dimensional structure can be curled into fullerenes with a zero-dimensional structure or carbon nanotubes with a one-dimensional structure, or it can be stacked into graphite with a three-dimensional structure to form a complete carbon family (Figure 9) [84]. Due to its excellent properties, graphene and its ramifications, such as reduced graphene oxide (rGO), have been used for catalysts [85], sensing [86], supercapacitors [87], lithium batteries [88], and so on. Additionally, recently, rGO has been regarded as a promising material for modifying MOS to obtain improving gas sensing properties [89,90,91].…”

Section: Doping With Two-dimensional Nanomaterialsmentioning

confidence: 99%

Approaches to Enhancing Gas Sensing Properties: A Review

Yuan

Meng

et al. 2019

Sensors

114

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A gas nanosensor is an instrument that converts the information of an unknown gas (species, concentration, etc.) into other signals (for example, an electrical signal) according to certain principles, combining detection principles, material science, and processing technology. As an effective application for detecting a large number of dangerous gases, gas nanosensors have attracted extensive interest. However, their development and application are restricted because of issues such as a low response, poor selectivity, and high operation temperature, etc. To tackle these issues, various measures have been studied and will be introduced in this review, mainly including controlling the nanostructure, doping with 2D nanomaterials, decorating with noble metal nanoparticles, and forming the heterojunction. In every section, recent advances and typical research, as well mechanisms, will also be demonstrated.

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Platinum supported on graphene - PTFE as catalysts for isotopic exchange in a detritiation plant

Cited by 10 publications

References 11 publications

Platinum on Reduced Graphene Oxide Nanosheets Obtained Under Microwave Irradiation, Using Reducing Agents

Platinum on Reduced Graphene Oxide Nanosheets Obtained Under Microwave Irradiation, Using Reducing Agents

A Mini Review on Liquid Phase Catalytic Exchange for Hydrogen Isotope Separation: Current Status and Future Potential

Approaches to Enhancing Gas Sensing Properties: A Review

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