Comparative Study of Plasma Torch Characteristics Using Air and Carbon Dioxide

Vadikkeettil, Yugesh; Pasupathi, Amarnath; Yugeswaran, S.; Ananthapadmanabhan, P.V.

doi:10.1109/tps.2021.3129593

Cited by 10 publications

(3 citation statements)

References 31 publications

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“…A customized high enthalpy DC non-transferred arc thermal plasma torch was used for this purpose. The plasma torch’s electrode configuration and I-V characterization are described elsewhere . The plasma torch was installed on top of the stainless-steel reactor chamber, which was cooled by forced cooling water.…”

Section: Methodsmentioning

confidence: 99%

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Phase-Pure High-Entropy Spinel Oxide (Ni,Fe,Mn,Cu,Zn)₃O₄ via Thermal Plasma: A Promising Electrocatalyst for Oxygen Evolution Reaction

Pasupathi

Madhu

Praveen

et al. 2023

ACS Appl. Energy Mater.

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High-entropy oxide (HEO) has recently emerged as a potential candidate material for electrochemical water splitting, with excellent activity and catalytic stability, as an alternative to the state-of-the-art oxygen evolution reaction (OER) catalyst. The main characteristics of HEO are its unique structure and the ability to tune physical, chemical, and mechanical properties. On tuning these properties, it exhibits high thermal stability, electrical conductivity, and catalytic activity. In this work, by utilizing a carbonaceous thermal plasma with Ar and CO2 as the major plasma-forming gases, a single-phase (NiFeMnCuZn)3O4 high-entropy oxide material has been produced at a discharge power of 12 kW for the first time. The as-synthesized powder was annealed at various temperatures (300, 350, and 400 °C) and characterized using various microscopic and spectroscopic tools. The dynamic light scattering study showed that the as-synthesized powder had a single-phase spinel structure with an average particle size of ∼140 nm. The synthesized materials were subjected to electrocatalytic water oxidation reaction studies. The results show that HEO annealed at 350 °C has an excellent OER catalytic activity in 1 M KOH electrolyte, with an overpotential of 308 mV at a current density of 50 mA cm–2 and a Tafel slope of 54 mV dec–1. Further, Operando-EIS analysis at different potentials evidences that HEO annealed at 350 °C shows less resistance toward the charge-transfer kinetics at the interface. This work provides insight into the rapid synthesis of phase-pure HEO electrocatalysts with excellent performance in energy-related applications.

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Section: Methodsmentioning

confidence: 99%

“…The plasma torch's electrode configuration and I-V characterization are described elsewhere. 43 The plasma torch was installed on top of the stainlesssteel reactor chamber, which was cooled by forced cooling water. Throughout the process, the reactor temperature was maintained at 20 °C.…”

Section: Introductionmentioning

confidence: 99%

Phase-Pure High-Entropy Spinel Oxide (Ni,Fe,Mn,Cu,Zn)₃O₄ via Thermal Plasma: A Promising Electrocatalyst for Oxygen Evolution Reaction

Pasupathi

Madhu

Praveen

et al. 2023

ACS Appl. Energy Mater.

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“…The basic characterization of a plasma torch (I−V characterization and electro-thermal efficiency) and the plasma jet properties (plasma temperature, electron density) were described elsewhere. 34,40 Plasma processing parameters such as plasma power, gas composition and flow rate, precursor feed rate, feeder position, and atomizing pressure were optimized to achieve the optimal output yield with the least amount of discharge power consumed. The optimum plasma torch operating parameters are shown in designed liquid feeder was used to inject the atomized feedstock precursor solution into the plasma zone.…”

Section: Methodsmentioning

confidence: 99%

A Novel Strategy for Rapid Synthesis of Nanostructured High-Entropy Metal Oxides through Thermal Plasma for Supercapacitor Applications

Pasupathi,

Subramaniam

2024

Energy Fuels

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High-entropy oxides (HEOs) are an emerging candidate of materials that has sparked increased attention in the field of sustainable energy because of their unique structure, tailorable chemical composition, and tunable physical, chemical, and functional properties. In this work, phase-pure HEO (Mn, Fe, Co, Ni, Cu) 3 O 4 nanoparticles were synthesized using thermal plasma under optimum processing conditions at 11 kW input power with argon and carbon dioxide as the plasma-forming gases. Assynthesized powders were annealed at different temperatures (200 to 500 °C) and subjected to structural characterization. The electrochemical energy storage performance of HEO nanoparticles was investigated via a conventional three-electrode setup in 1 M KOH electrolyte solution. For 0.5 A g −1 current density, the HEO electrode displayed a specific capacitance of 431 F g −1 . Capacitance retention and Coulombic efficiency were found to be 79.5 and 91.8% after 10,000 cycles of 3 A g −1 current density, respectively. This study provides a novel insight on the rapid production of phase-pure HEO nanoparticles through thermal plasma, with a propitious production rate of around 1.5 g/min.

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Numerical Simulation Study on Plasma Rapid Heater of Methane

Wang,

Kong,

Chen

et al. 2023

Plasma Chem Plasma Process

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Comparative Study of Plasma Torch Characteristics Using Air and Carbon Dioxide

Cited by 10 publications

References 31 publications

Phase-Pure High-Entropy Spinel Oxide (Ni,Fe,Mn,Cu,Zn)₃O₄ via Thermal Plasma: A Promising Electrocatalyst for Oxygen Evolution Reaction

Phase-Pure High-Entropy Spinel Oxide (Ni,Fe,Mn,Cu,Zn)₃O₄ via Thermal Plasma: A Promising Electrocatalyst for Oxygen Evolution Reaction

A Novel Strategy for Rapid Synthesis of Nanostructured High-Entropy Metal Oxides through Thermal Plasma for Supercapacitor Applications

Numerical Simulation Study on Plasma Rapid Heater of Methane

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Comparative Study of Plasma Torch Characteristics Using Air and Carbon Dioxide

Cited by 10 publications

References 31 publications

Phase-Pure High-Entropy Spinel Oxide (Ni,Fe,Mn,Cu,Zn)3O4 via Thermal Plasma: A Promising Electrocatalyst for Oxygen Evolution Reaction

Phase-Pure High-Entropy Spinel Oxide (Ni,Fe,Mn,Cu,Zn)3O4 via Thermal Plasma: A Promising Electrocatalyst for Oxygen Evolution Reaction

A Novel Strategy for Rapid Synthesis of Nanostructured High-Entropy Metal Oxides through Thermal Plasma for Supercapacitor Applications

Numerical Simulation Study on Plasma Rapid Heater of Methane

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Product

Resources

About

Phase-Pure High-Entropy Spinel Oxide (Ni,Fe,Mn,Cu,Zn)₃O₄ via Thermal Plasma: A Promising Electrocatalyst for Oxygen Evolution Reaction

Phase-Pure High-Entropy Spinel Oxide (Ni,Fe,Mn,Cu,Zn)₃O₄ via Thermal Plasma: A Promising Electrocatalyst for Oxygen Evolution Reaction