Novel high stable electrocatalyst based on non-stoichiometric nanocrystalline niobium carbide toward effective hydrogen evolution

Chebanenko, Maria I.; Данилович, Д. П.; Lobinsky, A.A.; Попков, В.И.; Rempel, А. А.; Валеева, А. А.

doi:10.1016/j.ijhydene.2021.01.223

Cited by 14 publications

(5 citation statements)

References 40 publications

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“…SSR and SSM have been frequently used for the syntheses of refractory and superhard materials, including pnictides, chalcogenides, silicides, borides, and carbides . Carbides in which carbon atoms are dissolved in interstitial sites of early transition metals show properties suitable for industrial utilization in terms of hardness, melting point, conductivity, and chemical stability. , Niobium carbide (NbC) stands out owing to its capabilities as an electrocatalyst for fuelsa cathode of electrochemical water splitting − and the latent ability to reduce CO 2 . SSR of NbC has been performed using Nb 2 O 5 and carbon sources, such as C. , The reaction necessitates high temperatures and results in greenhouse gas emissions.…”

Section: Introductionmentioning

confidence: 99%

Solid-State Synthesis of Niobium Carbide Electrocatalyst in the Presence of Vanadium as Suppressor of Energy Input and Greenhouse Gas Emission

Saito,

Jinushi,

Soga

2024

ACS Omega

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Solid-state reaction (SSR) is a widely adopted method for functional inorganic material syntheses. Unlike intricate systems emerging from chemically unstable precursor usage, the SSR can proceed from stable precursor couples using simple apparatuses. However, this reaction is associated with high temperatures that overcome solid-state diffusion. Moreover, solidstate syntheses of technologically crucial carbides lead to greenhouse gas emissions. Therefore, exploring an extrinsic component to suppress these challenges is vital to confronting global energy and environmental issues. This study reports that the presence of an ordinary element, vanadium (V), changes the routes of the SSR of niobium carbide (NbC), producing NbC efficiently and cleanly. 1000 °C is far below the temperature required to obtain NbC from a precursor couple of Nb 2 O 5 and C, i.e., approximately 1500 °C is required. However, a carbon substitute, vanadium carbide, completely consumed Nb 2 O 5 before reaching 1000 °C and consummated NbC crystallization for 10 h. Furthermore, NbC crystallites were observed using X-ray diffraction from 770 °C, and their formation was primarily accompanied by VNbO 4 , rather than being routed through NbO 2 produced for the Nb 2 O 5 −C combination. The obtained NbC contained V as a dopant in the 15−50% range (NbC:V), and the relative abundance was correlated with the preparation temperature. Mass analyses revealed that the formation of NbC/V is barely associated with greenhouse gas emissions because of the sizable thermodynamic driving force for primarily forming vanadium oxide byproducts. Device performance using NbC/V was also assessed for a standard electrochemical hydrogen evolution reaction.

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Section: Introductionmentioning

confidence: 99%

Solid-State Synthesis of Niobium Carbide Electrocatalyst in the Presence of Vanadium as Suppressor of Energy Input and Greenhouse Gas Emission

Saito,

Jinushi,

Soga

2024

ACS Omega

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“…Given these environmental challenges, there is a pressing need to advocate for the development and adoption of renewable and environmentally sustainable energy sources as viable alternatives to fossil fuels. [1][2][3][4][5][6][7] In this context, hydrogen has emerged as a promising substitute for conventional energy sources due to its exceptional energy density and environmentally benign characteristics. Its ability to be stored in the form of liquid gas enhances its versatility for application across various elds, facilitating ease of transportation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structure and electrochemical performance of an ultra-high-entropy rare earth orthoferrite (UHE REO) for overall water splitting (OWS)

Manh Long,

Cam,

Seroglazova

et al. 2024

Sustainable Energy Fuels

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“…Various experimental techniques, such as photoelectron spectroscopy [15][16][17][18], mass spectroscopy [19][20][21][22], X-ray diffraction spectroscopy [17,23], and infrared absorption spectroscopy [24], have been employed to explore the physical and chemical properties of niobium carbides and their ions. Wang and co-workers investigated a series of mononiobium carbide clusters, NbC n − (n = 2-7), using anion photoelectron spectroscopy [16].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Structures, Stabilities, and Electronic and Magnetic Properties of Niobium Carbon Clusters Nb7Cn (n = 1–7)

Li,

Wang,

Zhang

et al. 2024

Molecules

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The geometrical structures, relative stabilities, and electronic and magnetic properties of niobium carbon clusters, Nb7Cn (n = 1–7), are investigated in this study. Density functional theory (DFT) calculations, coupled with the Saunders Kick global search, are conducted to explore the structural properties of Nb7Cn (n = 1–7). The results regarding the average binding energy, second-order difference energy, dissociation energy, HOMO-LUMO gap, and chemical hardness highlight the robust stability of Nb7C3. Analysis of the density of states suggests that the molecular orbitals of Nb7Cn primarily consist of orbitals from the transition metal Nb, with minimal involvement of C atoms. Spin density and natural population analysis reveal that the total magnetic moment of Nb7Cn predominantly resides on the Nb atoms. The contribution of Nb atoms to the total magnetic moment stems mainly from the 4d orbital, followed by the 5p, 5s, and 6s orbitals.

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Novel high stable electrocatalyst based on non-stoichiometric nanocrystalline niobium carbide toward effective hydrogen evolution

Cited by 14 publications

References 40 publications

Solid-State Synthesis of Niobium Carbide Electrocatalyst in the Presence of Vanadium as Suppressor of Energy Input and Greenhouse Gas Emission

Solid-State Synthesis of Niobium Carbide Electrocatalyst in the Presence of Vanadium as Suppressor of Energy Input and Greenhouse Gas Emission

Synthesis, structure and electrochemical performance of an ultra-high-entropy rare earth orthoferrite (UHE REO) for overall water splitting (OWS)

Investigation of Structures, Stabilities, and Electronic and Magnetic Properties of Niobium Carbon Clusters Nb7Cn (n = 1–7)

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