A novel strategy for the preparation of metallic vanadium from V 2 CO solid solution as consumable anode is proposed by molten salt electrolysis. Controllable synthesis of V 2 CO solid solution was confirmed based on thermodynamic analysis and carbothermal reduction of V 2 O 3.The constant-current electrolysis process of V 2 CO was divided into …Web
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Production of vanadium metal from vanadium oxide by carbon reduction is achieved above 1700°C, where some stable vanadium carbide (VC or VC 2) can be produced. The stability of CO is higher than that of vanadium oxide, which is reduced in the following sequence during carbon thermal reduction: V 2 O 5, V 2 O 4, V 2 O 3, VO, …Web
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Furthermore, the volume fraction of vanadium carbide precipitates is less than niobium carbide precipitates due to the fact that the solubility of V is approximately an order of magnitude greater than that of Nb in the temperature of 760–840 °C. ... C. Lebeau, Production and control of HSLA steel castings. AFS Trans. 92, 645 (1984)Web
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Graphical Abstract. Electropolymerization: Vanadium carbide (VC) nanoparticles encased in nitrogen-doped carbon matrix on carbon cloth (VC@NC/CC) are prepared as a binder-free cathode for the …Web
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Developing highly active and stable cocatalysts at lower costs is greatly crucial for high-performance semiconductor-based photocatalytic H 2 evolution from water splitting. Herein, we report that noble-metal-free metallic vanadium carbide (VC) can function as a superior cocatalyst when integrated with CdS for efficient photocatalytic H 2 …Web
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In the present study, vanadium carbide is synthesized by the carbothermic reduction of a mechanically activated mixture of V2O5 and carbon black as reducing agents without any additives.Web
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Since vanadium carbide is chemically stable at room temperature and cannot be easily attacked even by strong acids, to remove the by-product (MgO), the as-milled powders were treated with 5% acetic acid solution. To complete phase formation, microwave heating was performed for 24 h milled samples.Web
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Vanadium carbide coating was obtained on the surface of AISI D2 steel by thermal reactive diffusion process using molten borax as based salt and vanadium pentoxide as vanadium donor. The process was performed at 900 °C, 940 °C, 980 °C and 1020 °C for 3 h, 4 h, 5 h and 6 h. ... and even directly makes the production and …Web
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Anhydrous borax powder (Na 2 B 4 O 7) as molten bath salt, vanadium oxide powder (V 2 O 5 ⩾99%) and chromium oxide powder (Cr 2 O 3 ⩾99%) as supplier of carbide forming elements in oxide baths, aluminum powder (Al⩾99%) as reducing agent and pure sodium fluoride powder (NaF) as fluidizing agent were used for different baths …Web
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Vanadium carbide (VC) is particularly important for industrial applications due to its excellent high temperature strength, ... and the production exhibits high specific surface area, well-defined chemical compositions, …Web
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Vanadium carbides have attracted much attention as highly active catalysts in both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), …Web
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Reducing the high hydrogen binding strength of vanadium carbide MXene with atomic Pt confinement for high activity toward HER. Author links open overlay panel Seungyoung Park a 1, Yea-Lee Lee b 1, Yeoheung Yoon a, ... enabling the mass production of hydrogen via a renewable energy route [1], [2]. Highly active …Web
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Cocatalyst loading is an efficient strategy to accelerate the hydrogen evolution reaction, which is the final crucial process to complete photocatalytic hydrogen production and realize solar-to-hydrogen conversion. Herein, we report that N-doped vanadium carbide (NVC) is combined with Pt to form a multifunctional cocatalyst capable of enhancing …Web
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Exploring efficient electrodes toward the hydrogen evolution reaction (HER) remains a great challenge for large-scale hydrogen production. Owing to its high earth abundance, low electrical resistivity, and small density, vanadium carbide (VC) is a promising HER electrode candidate but has been rarely explored.Web
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Vanadium carbide (VC) as excellent ceramic and functional material is usually prepared by carbothermal reduction of V 2 O 5 which must be extracted from a typical V slag by complex processes. Pollutants, such as ammonia-nitrogen wastewater, NH 3 and CO 2 are inevitably discharged. A novel and green method for VC preparation was …Web
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Vanadium carbide MXenes, specifically V 2 CT x, have shown promise for applications ranging from energy storage and sensing to electronics and optics.In the past decade, however, research involving V 2 CT x has been mostly limited to its multilayered form due to instability of delaminated V 2 CT x in its colloidal state. In this paper, we …Web
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To develop low-cost and high-performance non-precious metal-based oxygen reduction catalysts, we investigate the structure and catalytic performance of industrialized vanadium carbide (VC) and nitrogen doped vanadium carbide (V(C, N)). The structure of VC and V(C, N) were examined by XRD, SEM and XPS tests. Results …Web
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Vanadium carbide is a carbide of vanadium. It is a hard refractory ceramic material commercially used in tool bits cutting tools. Vanadium is a transition metal with the chemical symbol V and atomic number 23. The element usually combines with other elements such as oxygen, sodium, sulfur, or chloride, and occurs naturally in about 65 …Web
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Vanadium carbide powder ... Na 3 VO 4 can be used as a catalyst, paint drier, mordant, corrosion inhibitor, and in the production of other vanadium salts. 14.2.3.3. Preparation method. Na 3 VO 4 can be prepared by melting vanadium pentoxide with appropriate amounts of alkali metal carbonate or roasting with ferrovanadium powder …Web
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Vanadium carbide (V 8 C 7) nanopowders have been successfully synthesized by thermal processing the precursor of ammonium vanadate (NH 4 VO 3) and nanometer carbon black.The single phase V 8 C 7 powders can be prepared at ∼ 1100 °C for 1 h with the average crystallite size of 32.6 nm. The powders show good dispersion …Web
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Application of Vanadium Carbide VC 0.88 Vanadium carbide VC 0.88 is used in manufacturing of the protective coatings on steel products [21, 22]. It is also used as an inhibitor of growth grains of tungsten carbide in the production of carbide WC–Co. It is believed that vanadium carbide particles during sinter-ing interact with tungsten ...Web
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The synthesis of fine vanadium-carbide (VC0.88) powder is considered. To produce the vanadium carbide, vanadium(III) oxide is reduced by means of carbon nanofiber in an induction furnace with an argon atmosphere. The carbon nanofiber is produced by the catalytic decomposition of light hydrocarbons. The specific surface of …Web
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Probably, this is due to the method of production of vanadium carbide powders, especially nanocrystalline powders -plasmochemical synthesis [7], mechanosynthesis [8], temperature programmed ...Web
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The Asian nation far outpaces all other countries in terms of vanadium-mining output, and leads the world in vanadium consumption as well due to its high steel production. 2. Russia. Mine ...Web
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VC is an incredibly hard refractory ceramic with exceptional wear resistance, high modulus of elasticity (400 GPa), and good strength retention even at high temperatures [ 26 – 28 ]. VC coatings are used in corrosion prevention, cutting tool application, machining, drilling, and dyeing. Some industrial uses of VC are given in [ 27, 29 – 31 ].Web
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Vanadium carbide powders are a type of chemical compound that contain vanadium (V) and carbon ©. These powders are widely used in various industrial applications, including the production of…Web
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Introduction The transition metal carbides have very high melting points, hardness and high temperature strength. These materials also exhibit good electrical and …Web
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Developing highly active and stable cocatalysts at lower costs is greatly crucial for high-performance semiconductor-based photocatalytic H 2 evolution from water splitting. Herein, we report that noble-metal-free metallic vanadium carbide (VC) can function as a superior cocatalyst when integrated with CdS for efficient photocatalytic H 2 …Web
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To produce the vanadium carbide, vanadium(III) oxide is reduced by means of carbon nanofiber in an induction furnace with an argon atmosphere. The …Web
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A multilayered ternary carbide (MAX powder, here, M 3 AC 2) was mixed with an acidic solution of HF (for example, HCl-LiF) to produce multilayered M 3 C 2 T x MXenes.Web
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In fact with powder metallurgy production, vanadium carbides are usually smaller than the common chromium carbides or molybdenum/tungsten carbides since they are more stable and coarsen more slowly. Crucible Steel metallurgists took advantage of this fact with the development of CPM-10V which had high amounts of vanadium …Web
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Vanadium carbides have attracted much attention as highly active catalysts in both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), while a satisfactory understanding of the underlying mechanisms still remains a challenge. Herein we apply first-principles calculations to systematically anaWeb
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Vanadium carbide powders have diverse applications in various industries. In the metallurgical sector, they are widely used as an alloying element in the production of high-speed tools, wear ...Web
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