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 13 publications

(4 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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“…In the present study, we have attempted to fabricate NbC sheets through a bottom-up approach where carbon atoms occupy the interstitial sites in Nb atoms’ lattice . The commonly used synthesis methods to fabricate NbC include carburization of metal oxide nanoparticles, heat treatment of niobium citrate, and chemical vapor deposition. − , The conventional physicochemical methods are usually limited by their reaction conditions and thus can be replaced with greener methods of material production. There are few reports available for green methods, which were employed to synthesize TMCs such as NbC crystalline powder preparation at room temperature through mechanochemical processing .…”

Section: Introductionmentioning

confidence: 99%

Anaerobe Syntrophic Co-culture-Mediated Green Synthesis of Ultrathin Niobium Carbide (NbC) Sheets for Flexoelectricity Generation

Mahle

Mahapatra

Singh

et al. 2022

ACS Sustainable Chem. Eng.

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Niobium carbide (NbC x )-based materials have garnered significant attention in energy-and power-based applications. The physiochemistry-mediated preparation of two-dimensional (2D) NbC structures is often limited by extremely high-temperature and -pressure reaction conditions conjugated with toxic chemicals. In the present study, a unique biobased strategy, utilizing a solid−gas reaction, is developed, which involves the carburization of niobium salt (NbCl 5 )-based oxides using methane (CH 4 ) and other metabolic gases produced by methanogen syntrophic culture. Thermodynamic calculations were performed to comprehend the reaction conditions of the biosystem during NbC formation. The bioprepared NbC sheets were found to be ∼10 nm thin and were studied for their potential in energy harvesting applications. The strain-induced charge generation was evaluated by fabricating a flexoelectric energy harvester with NbC sheets as a flexoelectric material. The maximum power output was ∼2.64 mW/m 2 for 8.8 N applied force. We obtained clear evidence of flexoelectricity in NbC using Raman analysis. Finally, external pressure-, magnetic force-, and temperature-dependent responses were recorded to visualize the practical applications of NbC-based flexible flexoelectric nanogenerators in wearable electronics and sensing.

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

Cited by 13 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)

Anaerobe Syntrophic Co-culture-Mediated Green Synthesis of Ultrathin Niobium Carbide (NbC) Sheets for Flexoelectricity Generation

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