Ultra-small-sized multi-element metal oxide nanofibers: an efficient electrocatalyst for hydrogen evolution

Liu, Peng; Sun, Chang C.; Liu, Guiju; Zhan, Jing; Zhao, Hongbin

doi:10.1039/d2na00100d

Cited by 7 publications

(2 citation statements)

References 52 publications

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“…In the region II (mid-temperature region), the conductivity differs exponentially with the temperature that is no longer linear wherein the change in slope (from positive to negative) may be attributed to the facts such as a mixed type of conduction inducted by thermally activated charge carriers and the oxygen vacancies in the nanoproduct [24][25][26][27]. The presence of oxygen vacancies and transfer of charge carriers concerning metal-insulator connects the sample probe into the analysis of critical temperature of hightemperature superconducting cuprates, usage as catalysts for hydrogen evolution reaction in support of green energy, as the secondary power supply in integrated circuits, and current overload protection devices [28][29][30].…”

Section: Ftir Analysis Of the Sample Ft-ir Analysis Was Carriedmentioning

confidence: 99%

Synthesis of a Novel Nanoparticle BaCoO_2.6 through Sol‐Gel Method and Elucidation of Its Structure and Electrical Properties

Rafiq

Govindsamy

Periyasamy

2022

Journal of Nanomaterials

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The physical properties of cobalt oxide with varied oxidation states, and coordination numbers, in the transition series, have numerous applications. The present study explores the physical properties of BaCoO2.6 nanoparticles synthesized through the sol-gel method. The X-ray diffraction figure exhibits a 25 nm crystallite size hexagonal phase. The observational data shows the reduction in the real part of impedance ( Z ’ ), dielectric constant ( ξ ’ ), dielectric loss ( ξ ” ), and a raise in ac conductivity of mixed type of conduction with an elevation in frequency analyzed through impedance spectroscopy. The conductivity due to grain and grain boundaries is shown foremost in the complex impedance analysis. The plot of ∆ V / ∆ T (Seebeck coefficient) in the low-temperature range indicates p-type behavior and the metal-insulator transition in the as-synthesized sample. The sample characteristics suggest applications in optical and switching devices. The Seebeck coefficient is the generation of potential difference when subjected to temperature difference. Thermoelectric materials are associated with the concept of high electrical conductivity like crystals and low thermal conductivity to that of glass. Nanothermoelectric materials can decrease further the thermal conductivity through phonon scattering. Electrical characterization suggests the presence of both NTCR and PTCR behavior in the sample, and hence, it explores the application in thermistor/resistance temperature detector’s (RTD) and low dielectric constant and loss to electro-optical and higher conversion efficiency to storage devices. Additionally, impedance spectroscopy helps in the study of electrochemical systems and solid-state devices wherein the transition of metal-insulator is an add-on to the research.

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Section: Ftir Analysis Of the Sample Ft-ir Analysis Was Carriedmentioning

confidence: 99%

Synthesis of a Novel Nanoparticle BaCoO_2.6 through Sol‐Gel Method and Elucidation of Its Structure and Electrical Properties

Rafiq

Govindsamy

Periyasamy

2022

Journal of Nanomaterials

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“…Recently, transition metal oxides (TMOs) have garnered ample attention as a proficient catalyst because of their high electrochemical activity and cost-effectiveness [24][25][26][27][28]. Among various TMOs, molybdenum trioxide (MoO 3 ) has emerged as an efficient electrocatalyst because of its double-layer planar structure, nontoxicity, high stability, and intrinsic characteristics [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Excellent Bifunctional Water Electrolysis Activities of α-MoO3/AC Nanocomposites

Sekar,

Yun,

Park

et al. 2024

International Journal of Energy Research

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Electrocatalytic water splitting is a cost-effective and environment-friendly technique for producing oxygen and hydrogen through the oxygen/hydrogen evolution reaction (OER/HER). Developing the highly active and stable electrocatalyst, particularly for bifunctional water electrolysis (i.e., both OER and HER), is still a formidable challenge. Herein, we demonstrated the enhanced bifunctional water splitting activities by utilizing the molybdenum trioxide-anchored activated carbon (MoO3/AC) nanocomposites. The MoO3/AC samples were fabricated by the ultrasonication method using sol-gel synthesized MoO3 and biomass-derived AC, and they displayed a nanostreusel-like morphology with spherical MoO3 nanoparticle-decorated AC nanosheets. For the water electrolysis test, the MoO3/AC nanocomposites exhibited the excellent bifunctional electrocatalytic OER and HER performances with low overpotential and small Tafel slope values. Through analyzing the material characteristics and the electrochemical properties of MoO3/AC, it was found that the superb bifunctional OER-HER activities were attributed to the synergistic effects from the hybridization of highly conductive AC and electrochemically active α-MoO3. The results pronounce that the MoO3/AC nanocomposites possess an aptitude as a superb bifunctional OER/HER electrocatalyst for high-performance water electrolysis.

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Metal Oxide-Based Electrocatalytic Materials

Jamadar,

Yadav

2024

Electrocatalytic Materials

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Ultra-small-sized multi-element metal oxide nanofibers: an efficient electrocatalyst for hydrogen evolution

Abstract: Compared to noble-metals, transition metal oxides (TMO) have positive development prospect in the field of electrocatalysis and the synergy between the elements in the multi-element TMO-based materials could improve catalytic...

Cited by 7 publications

References 52 publications

Synthesis of a Novel Nanoparticle BaCoO_2.6 through Sol‐Gel Method and Elucidation of Its Structure and Electrical Properties

Synthesis of a Novel Nanoparticle BaCoO_2.6 through Sol‐Gel Method and Elucidation of Its Structure and Electrical Properties

Excellent Bifunctional Water Electrolysis Activities of α-MoO3/AC Nanocomposites

Metal Oxide-Based Electrocatalytic Materials

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Ultra-small-sized multi-element metal oxide nanofibers: an efficient electrocatalyst for hydrogen evolution

Abstract: Compared to noble-metals, transition metal oxides (TMO) have positive development prospect in the field of electrocatalysis and the synergy between the elements in the multi-element TMO-based materials could improve catalytic...

Cited by 7 publications

References 52 publications

Synthesis of a Novel Nanoparticle BaCoO2.6 through Sol‐Gel Method and Elucidation of Its Structure and Electrical Properties

Synthesis of a Novel Nanoparticle BaCoO2.6 through Sol‐Gel Method and Elucidation of Its Structure and Electrical Properties

Excellent Bifunctional Water Electrolysis Activities of α-MoO3/AC Nanocomposites

Metal Oxide-Based Electrocatalytic Materials

Contact Info

Product

Resources

About

Synthesis of a Novel Nanoparticle BaCoO_2.6 through Sol‐Gel Method and Elucidation of Its Structure and Electrical Properties

Synthesis of a Novel Nanoparticle BaCoO_2.6 through Sol‐Gel Method and Elucidation of Its Structure and Electrical Properties