N-Doped few-layer graphene encapsulated Pt-based bimetallic nanoparticles <i>via</i> solution plasma as an efficient oxygen catalyst for the oxygen reduction reaction

Phan, Phu Quoc; Naraprawatphong, Rinyarat; Pornaroontham, Phuwadej; Park, Junmu; Chokradjaroen, Chayanaphat; Saito, Nagahiro

doi:10.1039/d0ma00718h

Cited by 23 publications

(34 citation statements)

References 70 publications

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“…They reported that, as with bulk graphite, the obtained graphene nanosheet had a layer distance of around 0.34 nm. The same results were also obtained when Phan et al performed experiments for the nitrogen-doped metal nanoparticle covered in a few graphene layers by using solution plasma with a 1.0 µs pulse width and a 30 kHz repetition frequency [114].…”

Section: 4 For Peersupporting

confidence: 70%

“…It seems that the carbon materials possessed the multi-walled carbon nanocapsule with walls consisting of several graphene layers ranging from two to six layers. The gaps between the atomic layers in these carbon products were around 0.34 nm, where the 0.34 nm distance can be associated with the lattice spacing of graphene layers [111][112][113][114]. This revealed that the carbon materials could be generated by applying the high-voltage discharge plasma on the glycine solution through deamination and decarboxylation reactions [40][41][42][43]98].…”

Section: 4 For Peermentioning

confidence: 99%

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Pulsed Discharge Plasma in High-Pressure Environment for Water Pollutant Degradation and Nanoparticle Synthesis

Diono

Machmudah

Kanda

et al. 2021

Plasma

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The application of high-voltage discharge plasma for water pollutant decomposition and the synthesis of nanoparticles under a high-pressure argon gas environment (~4 MPa) was demonstrated. The experiments were carried out in a batch-type system at room temperature with a pulsed DC power supply (15.4 to 18.6 kV) as a discharge plasma source. The results showed that the electrode materials, the pulsed repetition rates, the applied number of pulses, and the applied voltages had a significant effect on the degradation reactions of organic compounds. Furthermore, carbon solid materials from glycine decomposition were generated during the high-voltage discharge plasma treatment under high-pressure conditions, while Raman spectra and the HRTEM images indicated that titanium dioxide with a brookite structure and titanium carbide nanoparticles were also formed under these conditions. It was concluded that this process is applicable in practice and may lead to advanced organic compound decomposition and metal-based nanoparticle synthesis technologies.

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Section: 4 For Peersupporting

confidence: 70%

Section: 4 For Peermentioning

confidence: 99%

Pulsed Discharge Plasma in High-Pressure Environment for Water Pollutant Degradation and Nanoparticle Synthesis

Diono

Machmudah

Kanda

et al. 2021

Plasma

View full text Add to dashboard Cite

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“…Here, a brief explanation of the electrical discharge under an aqueous solution (e.g., electrical breakdown, formation of reactive species, and influencing factors) in the SPP is provided. [14,29,30], (b) [31,32], (c) [27,[33][34][35], (d) [36][37][38], (e) [15,22], and (f) [39][40][41][42]. [31,32], (c) [27,[33][34][35], (d) [36][37][38], (e) [15,22], and (f) [39][40][41][42].…”

Section: Solution Plasma Process (Spp): Chemistry and Influencing Parametersmentioning

confidence: 99%

“…The distance between the tips of electrodes in the HCl solution increased from 0.1 mm to 0.17 mm, while 0.12 mm and 0.15 mm were observed in the KCl and KOH solution, respectively. Accordingly, it suggested that acidity has a significant influence on the sputtering of metal electrodes in the SPP, which is considered as an advantage for the synthesis of metal-based nanoparticles without using precursors and reducing agents [ 32 , 38 , 57 ]. Furthermore, the investigation on the formation of • OH was also conducted via the time-resolved optical emission measurement at various time delays to the positive voltage pulse in the range of 0–38 μs.…”

Section: Solution Plasma Process (Spp): Chemistry and Influencing Parametersmentioning

confidence: 99%

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Insight on Solution Plasma in Aqueous Solution and Their Application in Modification of Chitin and Chitosan

Chokradjaroen

Niu

Panomsuwan

et al. 2021

IJMS

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Sustainability and environmental concerns have persuaded researchers to explore renewable materials, such as nature-derived polysaccharides, and add value by changing chemical structures with the aim to possess specific properties, like biological properties. Meanwhile, finding methods and strategies that can lower hazardous chemicals, simplify production steps, reduce time consumption, and acquire high-purified products is an important task that requires attention. To break through these issues, electrical discharging in aqueous solutions at atmospheric pressure and room temperature, referred to as the “solution plasma process”, has been introduced as a novel process for modification of nature-derived polysaccharides like chitin and chitosan. This review reveals insight into the electrical discharge in aqueous solutions and scientific progress on their application in a modification of chitin and chitosan, including degradation and deacetylation. The influencing parameters in the plasma process are intensively explained in order to provide a guideline for the modification of not only chitin and chitosan but also other nature-derived polysaccharides, aiming to address economic aspects and environmental concerns.

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Solution Plasma‐Assisted Multivariate Metal Nanoalloys Encapsulated with Carbon Dots for Efficient Oxygen Evolution Reaction

Yan

Ding

et al. 2023

ChemCatChem

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To accelerate the reaction kinetics of electrocatalytic oxygen evolution reaction (OER), a multicomponent CDs@(PdFeNiCo)Nbx nanohybrid comprising multiple metal nanoalloys and carbon quantum dots (CDs) was in situ generated by treating the mixture of Nb2C quantum dots (Nb2C QDs) and a variety of metal ions (M2+=Pd2+, Fe2+, Co2+, Ni2+) through the solution plasma (SP) modification technique. The CDs@(PdFeNiCo)Nbx catalyst was further explored as an electrocatalyst for OER in alkaline solution. Under nitrogen plasma irradiation with high input power (200 W), diverse bimetallic nanoalloy particles, including NbPd3, FeNb, NbNi3, and CoNbO4 nanoalloys, were generated, accompanied with the decomposition of Nb2C QDs into CDs. In view of the synergic effect between multivariate metal active sites and highly conjugated CD network, the developed CDs@(PdFeNiCo)Nbx electrocatalyst showed a small overpotential of 240 mV for achieving the current density of 10 mA cm−2, together with a very low Tafel slope of 62 mV dec−1, which substantially outperformed those of the state‐of‐the‐art metal electrocatalysts and was competitive with most metal oxides. The CDs@(PdFeNiCo)Nbx electrocatalyst also showed a negligible overpotential change during 30 h chronopotentiometry measurement. The present work can provide a feasible alternative strategy for the development of an excellent OER electrocatalyst using the SP modification method.

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N-Doped few-layer graphene encapsulated Pt-based bimetallic nanoparticles via solution plasma as an efficient oxygen catalyst for the oxygen reduction reaction

Abstract: A superior durability of N-doped few-layer graphene shell for Pt-based bimetallic core protection by solution plasma process.

Cited by 23 publications

References 70 publications

Pulsed Discharge Plasma in High-Pressure Environment for Water Pollutant Degradation and Nanoparticle Synthesis

Pulsed Discharge Plasma in High-Pressure Environment for Water Pollutant Degradation and Nanoparticle Synthesis

Insight on Solution Plasma in Aqueous Solution and Their Application in Modification of Chitin and Chitosan

Solution Plasma‐Assisted Multivariate Metal Nanoalloys Encapsulated with Carbon Dots for Efficient Oxygen Evolution Reaction

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