Al3+-doping dependence on structural phase evolution in the LaCrO3 compound studied using atomistic simulation

Silva, R.S.; Otsuka, André M.; Ferreira, Nilson S.

doi:10.1016/j.jpcs.2020.109734

Cited by 2 publications

(1 citation statement)

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“…Mainly, these perovskite materials possess higher thermal resistance than other noble materials. They also possess many properties like electrical, magnetic, and optical properties and have different crystalline structures such as hexagonal, orthorhombic, and cubic. − Doping of several transition metals will lead to an increase in the band gap of the material, which certainly changes some of the physical properties of the material. − The general stoichiometry formula for the perovskite material is ABX 3 , where A and B represent the cationic counterparts and X represents the negatively polarized anionic sites. Cation B is surrounded by anion X in the crystalline structure.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of Ru NPs over 3D LaCrO₃ Nanostructures for High-Performance HER Catalysts in Acidic Media

et al. 2022

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Hydrogen is considered as one of the best alternatives to carbon-based fossil fuels as energy sources. Electrocatalytic water splitting is one of the finest and eco-friendly methods for the production of hydrogen as compared to all other methods such as stream reforming carbon, hydrolysis of metal hydrides, etc. However, the sluggish kinetics on both the half-cell reactions limits the large-scale production of hydrogen. Hence, to overcome such kind of kinetic issues, designing a catalyst with characteristics of low overpotential and high stability is a matter of prime importance for the research community. Perovskite oxides are one of the welldocumented materials for their excellent electrocatalytic water oxidation activity. But because of the lack of a proper proton adsorption site, these materials are unable to show proper hydrogen evolution reaction (HER) activity. Several strategies have been adopted for improving the HER activity of perovskite materials like cation doping, nanostructuring, etc. Here in this work, we prepared a shape-selective LaCrO 3 (LCO) material. To enhance the electrocatalytic activity, we decorated the LCO with Ru nanoparticles via a hydrothermal method with different concentrations of Ru (Ru@LaCrO 3 ), coined LCO n (n = 1−2.5). The assynthesized RLCO 2.5 showed the highest HER activity by demanding a low overpotential of 150 mV, whereas bare LCO demanded a higher overpotential of 364 mV to reach the benchmark current density of 10 mA/cm 2 . Also, RLCO 2.5 showed a very low R ct value of 15.8 Ω and followed the facile kinetics with a lower Tafel value of 101 mV/dec. It also showed excellent stability over 55 h at a current density of 10 mA/cm 2 in chronoamperometry studies. Acceleration degradation studies of RLCO 2.5 showed comparably good activity with a small hike in overpotential toward HER. Hence, RLCO-based materials are highly helpful to develop efficient electrocatalysts to produce hydrogen in a large scale.

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Section: Introductionmentioning

confidence: 99%

Stabilization of Ru NPs over 3D LaCrO₃ Nanostructures for High-Performance HER Catalysts in Acidic Media

et al. 2022

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Effects of Al3+ doping on the structure and electrical properties of La0.9Sr0.1CrO3 ceramics

Wang,

Sun,

Liu

et al. 2024

Journal of Solid State Chemistry

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Al3+-doping dependence on structural phase evolution in the LaCrO3 compound studied using atomistic simulation

Cited by 2 publications

References 30 publications

Stabilization of Ru NPs over 3D LaCrO₃ Nanostructures for High-Performance HER Catalysts in Acidic Media

Stabilization of Ru NPs over 3D LaCrO₃ Nanostructures for High-Performance HER Catalysts in Acidic Media

Effects of Al3+ doping on the structure and electrical properties of La0.9Sr0.1CrO3 ceramics

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Al3+-doping dependence on structural phase evolution in the LaCrO3 compound studied using atomistic simulation

Cited by 2 publications

References 30 publications

Stabilization of Ru NPs over 3D LaCrO3 Nanostructures for High-Performance HER Catalysts in Acidic Media

Stabilization of Ru NPs over 3D LaCrO3 Nanostructures for High-Performance HER Catalysts in Acidic Media

Effects of Al3+ doping on the structure and electrical properties of La0.9Sr0.1CrO3 ceramics

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Stabilization of Ru NPs over 3D LaCrO₃ Nanostructures for High-Performance HER Catalysts in Acidic Media

Stabilization of Ru NPs over 3D LaCrO₃ Nanostructures for High-Performance HER Catalysts in Acidic Media