Electrochemically synthesized Molybdenum oxides for enhancement of atmospheric pressure non-thermal pulsating corona plasma induced degradation of an organic compound

Petrović, Milica; Rančev, Saša; Đorđević, Marija Prekajski; Najdanović, Slobodan; Velinov, Nena; Vučić, Miljana Radović; Bojić, Aleksandar

doi:10.1016/j.ces.2020.116209

Cited by 10 publications

(4 citation statements)

References 47 publications

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“…[ 23 ] Additionally, two characteristic peaks are observed at 800 and 511 cm −1 , ascribed to the stretching vibration of M─O (Ni/Fe─O) and O─M─O (M═Ni, Fe) bonds, respectively. [ 24 ] It is noteworthy that in MoO 3 /NiFe‐NF, a sharp peak is observed at 590 cm −1 , attributed to the bending vibration of Mo─O─Mo bonds in MoO 3 , confirming the successful introduction of MoO 3 [ 25 ] In MoO 3 /NiFe‐NF, the functional groups are similar to those in NiFe‐NF, and almost no shift is observed. These findings display the establishment of the characteristic NiFe‐LDH structure, and after electrodeposition, the structure of the composite material remains unchanged, preserving the original NiFe‐LDH structure.…”

Section: Resultsmentioning

confidence: 93%

Heterostructured MoO₃ Anchored Defect‐Rich NiFe‐LDH/NF as a Robust Self‐Supporting Electrocatalyst for Overall Water Splitting

Jiang,

Yu,

Duan

et al. 2023

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The rational design of inexpensive metal electrocatalysts with exciting catalytic activity for overall water splitting (OWS) remains a significant challenge. Heterostructures of NiFe layered double hydroxides (NiFe‐LDHs) with abundant oxygen defects and tunable electronic properties have garnered considerable attention. Here, a self‐supporting heterostructured catalyst (named MoO3/NiFe‐NF) is synthesized via a hydrothermal method to grow NiFe‐LDH with oxygen vacancies (OV) in situ on inexpensive nickel foam (NF). Subsequently, MoO3 is anchored and grown on the surface of NiFe‐LDH by electrodeposition. The obtained catalysts achieved outstanding oxygen/hydrogen evolution reaction (OER/HER, 212 mV/85 mV@10 mA cm−2) performance in 1 m KOH. Additionally, when MoO3/NiFe‐NF is utilized as the cathode and anode in OWS, a current density of 10 mA cm−2 can be obtained as an ultralow battery voltage of 1.43 V, a significantly lower value compared to the commercial electrolyzer incorporating Pt/C and IrO2 electrode materials. Finally, density functional theory (DFT) calculations and advanced spectroscopy technology are conducted to reveal the effects of heterojunctions and OV on the internal electronic structure of the electrical catalysts. Mainly, the present study provides a novel tactic for the rational design of remarkable, low‐cost NiFe‐LDH electrocatalysts with heterostructures for OWS.

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Section: Resultsmentioning

confidence: 93%

Heterostructured MoO₃ Anchored Defect‐Rich NiFe‐LDH/NF as a Robust Self‐Supporting Electrocatalyst for Overall Water Splitting

Jiang,

Yu,

Duan

et al. 2023

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“…This was confirmed by the high R 2 values, which only slightly decreased as C 0 increased (table 1). For comparison, the same kinetics model was obtained for DBD plasma decolorization of doxycycline hyclate using Bi 0.5 Fe 0.5 V O 4 /honeycomb ceramic plate catalyst [7] and DBD-NPT plasma decolorization of AO 7 using g-C 3 N 4 /TiO 2 catalyst [21]. The non-catalyzed decolorization of RB 19 by an atmospheric-pressure pulsating corona discharge also followed pseudo first-order kinetics [15], confirming that the decolorization mostly proceeded via the same agent, i.e.…”

Section: Decolorization Kineticsmentioning

confidence: 95%

“…While this phenomenon has been largely examined and used to develop a variety of catalysts for photodegradation processes [18,19], research into plasma-catalyzed organic degradation in water remains limited. The literature data report the use of BiPO 4 in decolorization of crystal violet [20], g-C 3 N 4 /TiO 2 catalysts for decolorization of Acid Orange 7 [21], Mn-doped cobalt oxyhydroxide catalyst in decolorization of caffeic acid [9] and Bi 0.5 Fe 0.5 VO 4 /honeycomb ceramic plate in decolorization of doxycycline hyclate [7] by DBD plasma, tin containing aluminophosphate molecular sieves in decolorization of Acid Green 25 [13], TiO 2 in decolorization of textile wastewaters [12] and laterite soil in decolorization of Orange G [11] by GAD plasma, and Cu-TiO 2 in decolorization of Reactive Red-198 by an atmospheric pressure Ar plasma jet [10]. However, there is limited documentation of the use of catalysts in corona plasma degradation.…”

Section: Introductionmentioning

confidence: 99%

Non-thermal atmospheric-pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi₂O₃ catalyst

PETROVIĆ,

RADIVOJEVIĆ,

RANČEV

et al. 2024

Plasma Sci. Technol.

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Monoclinic Bi2O3 was applied for the first time, to the best of our knowledge, as a catalyst in a process of the dye degradation by the non-thermal atmospheric pressure positive pulsating corona discharge. The research focused on the interaction of the plasma-generated species and the catalyst, as well as its role in the degradation process. Plasma decomposition of the anthraquinone reactive dye Reactive Blue 19 (RB 19) was performed by the self- made reactor system. Bi2O3 was prepared by electrodeposition followed by thermal treatment, and characterized by XRD, SEM and EDX techniques. It was observed that the catalyst promoted decomposition of plasma-generated H2O2 into •OH radicals, the principle dye-degrading reagent, which further attacked the dye molecules. The catalyst improved the decolorization rate by 2.5 times, the energy yield by 93.4%, and the total organic carbon TOC removal by 7.1%, respectively. The excitation of the catalyst mostly occurred through the strikes of plasma-generated reactive ion and radical species from the air, accelerated by the electric field, as well as by the fast electrons with the energy of up to 15 eV, generated by the streamers reaching the liquid surface. Those strikes transferred the energy to the catalyst and created the electrons and holes which further reacted with H2O2 and water, producing the •OH radicals. This was indentified as the primary role of the catalyst in this process. Decolorization reactions followed the pseudo first order kinetics. Production of H2O2 and dye degradation rate increased with the increase of input voltage. The optimal catalyst dose was 500 mg dm-3. Decolorization rate was little lower in the river water compared to the one in deionized water due to the side reactions of •OH radicals with the organic matter and inorganic ions dissolved in the river water.

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“…Patil et al 37 and Zhang et al 38 reported the electrodeposition of Mo oxide; however, the associated methods require a special substrate or a few additional steps prior to electrodeposition. Petrović et al 39 reported the electrodeposition of MoO 2 on a Ti sheet; however, the obtained MoO 2 had a foil-like structure with numerous cracks and demonstrated insufficient adhesion to the substrate.…”

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confidence: 99%

Electrodeposition of Amorphous Molybdenum Oxide on Iron-Group Element Based Plating and its Novel Application as a Corrosion Protective Coating

Park

Hagio

Nijpanich

et al. 2022

J. Electrochem. Soc.

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The corrosion resistance of materials composed of metal is an essential property for preventing material deterioration caused by corrosion. In this study, we demonstrate that corrosion resistance can be significantly improved through the electrodeposition of molybdenum oxide onto a metal plating containing iron-group elements. Mo oxide can be electrodeposited using a simple plating bath, low current density, and short deposition time, exhibiting a fascinating metallic gloss appearance. GI-XRD and XPS analyses revealed that amorphous Mo oxide adhered to the substrate by a seed layer partially reduced to metallic Mo by the iron-group element in the substrate, based on the principle of “induced co-deposition.” A Mo oxide coating with a thickness of approximately 100 nm decreases the corrosion current density of Ni-W plating by approximately 5 times and the passivation current density by approximately 10 times in a 3 mass% NaCl solution. Mo oxide coatings represent an attractive strategy for improving the corrosion resistance of various metal materials containing iron-group elements.

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Electrochemically synthesized Molybdenum oxides for enhancement of atmospheric pressure non-thermal pulsating corona plasma induced degradation of an organic compound

Cited by 10 publications

References 47 publications

Heterostructured MoO₃ Anchored Defect‐Rich NiFe‐LDH/NF as a Robust Self‐Supporting Electrocatalyst for Overall Water Splitting

Heterostructured MoO₃ Anchored Defect‐Rich NiFe‐LDH/NF as a Robust Self‐Supporting Electrocatalyst for Overall Water Splitting

Non-thermal atmospheric-pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi₂O₃ catalyst

Electrodeposition of Amorphous Molybdenum Oxide on Iron-Group Element Based Plating and its Novel Application as a Corrosion Protective Coating

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Electrochemically synthesized Molybdenum oxides for enhancement of atmospheric pressure non-thermal pulsating corona plasma induced degradation of an organic compound

Cited by 10 publications

References 47 publications

Heterostructured MoO3 Anchored Defect‐Rich NiFe‐LDH/NF as a Robust Self‐Supporting Electrocatalyst for Overall Water Splitting

Heterostructured MoO3 Anchored Defect‐Rich NiFe‐LDH/NF as a Robust Self‐Supporting Electrocatalyst for Overall Water Splitting

Non-thermal atmospheric-pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi2O3 catalyst

Electrodeposition of Amorphous Molybdenum Oxide on Iron-Group Element Based Plating and its Novel Application as a Corrosion Protective Coating

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Heterostructured MoO₃ Anchored Defect‐Rich NiFe‐LDH/NF as a Robust Self‐Supporting Electrocatalyst for Overall Water Splitting

Heterostructured MoO₃ Anchored Defect‐Rich NiFe‐LDH/NF as a Robust Self‐Supporting Electrocatalyst for Overall Water Splitting

Non-thermal atmospheric-pressure positive pulsating corona discharge in degradation of textile dye Reactive Blue 19 enhanced by Bi₂O₃ catalyst