Yttrium Oxide Supported La2O3 Nanomaterials for Catalytic Oxidative Cracking of n-Propane to Olefins

Al-Sultan, Fawaz S.; Basahel, Sulaiman N.; Narasimharao, Katabathini

doi:10.1007/s10562-019-02927-z

Cited by 16 publications

(4 citation statements)

References 40 publications

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“…Furthermore, the chemical composition of the synthesized nanoflakes was determined by X-ray photoelectron spectroscopy (XPS). As shown in Figure b, the La 3 d XPS patterns of LaOCl indicate the characteristic La 3+ binding energies between 828 and 858 eV: La 3+ 3 d 5/2 (834.1 eV), La 3+ 3 d 3/2 (850.8 eV), and two satellite peaks at 838.1 and 854.9 eV. − The two peaks located at 198.6 and 200.2 eV belong to Cl 2 p 3/2 and Cl 2 p 1/2 , respectively, while the peaks at 195.1 and 196.7 eV could be assigned to La 3+ 4 p Figure c displays the Raman mapping image of a LaOCl nanoflake at 332.2 cm –1 , indicating the uniform chemical distribution across the entire LaOCl flakes.…”

Section: Resultsmentioning

confidence: 95%

General Approach for Two-Dimensional Rare-Earth Oxyhalides with High Gate Dielectric Performance

et al. 2023

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Two-dimensional (2D) rare-earth oxyhalides (REOXs) with novel properties offer fascinating opportunities for fundamental research and applications. The preparation of 2D REOX nanoflakes and heterostructures is crucial for revealing their intrinsic properties and realizing high-performance devices. However, it is still a great challenge to fabricate 2D REOX using a general approach. Herein, we design a facile strategy to prepare 2D LnOCl (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy) nanoflakes using the molten salt method assisted by the substrate. A dual-driving mechanism was proposed in which the lateral growth could be guaranteed by the quasi-layered structure of LnOCl and the interaction between the nanoflakes and the substrate. Furthermore, this strategy has also been successfully applied for block-by-block epitaxial growth of diverse lateral heterostructures and superlattice. More significantly, the high performance of MoS2 field-effect transistors with LaOCl nanoflake as the gate dielectric was demonstrated, exhibiting competitive device characteristics of high on/off ratios up to 107 and low subthreshold swings down to 77.1 mV dec–1. This work offers a deep understanding of the growth of 2D REOX and heterostructures, shedding new light on the potential applications in future electronic devices.

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Section: Resultsmentioning

confidence: 95%

General Approach for Two-Dimensional Rare-Earth Oxyhalides with High Gate Dielectric Performance

et al. 2023

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“…The (Pr 1−x Yb x ) 2 Zr 2 O 7 -1400 catalysts exhibiting high activity and selectivity towards propane cracking possess active sites constructed of pairs of zirconium and lanthanoid cations bound to oxygen vacancies and lattice oxide anions. These sites are capable of efficient C-H bond activation, which is actually the rate-limiting step in light alkane dehydrogenation [25].…”

Section: Catalytic Propertiesmentioning

confidence: 99%

“…Nowadays, propane dehydrogenation is one of the main technologies for production of light olefins [23,24]. It has been shown that metal oxide-based materials can be used as promising catalysts for the conversion of propane to olefins [23][24][25]. More specifically, compounds with a common stoichiometry (Pr 1−x Yb x ) 2 Zr 2 O 7 , synthesized at 1000 • C, have been recently successfully tested for the catalytic cracking of propane [26].…”

Section: Introductionmentioning

confidence: 99%

Influence of Synthesis Conditions on the Crystal, Local Atomic, Electronic Structure, and Catalytic Properties of (Pr1−xYbx)2Zr2O7 (0 ≤ x ≤ 1) Powders

Popov,

Markova,

Zubavichus

et al. 2023

Crystals

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The influence of Yb3+ cations substitution for Pr3+ on the structure and catalytic activity of (Pr1−xYbx)2Zr2O7 powders synthesized via coprecipitation followed by calcination is studied using a combination of long- (s-XRD), medium- (Raman, FT-IR, and SEM-EDS) and short-range (XAFS) sensitive methods, as well as adsorption and catalytic techniques. It is established that chemical composition and calcination temperature are the two major factors that govern the phase composition, crystallographic, and local-structure parameters of these polycrystalline materials. The crystallographic and local-structure parameters of (Pr1−xYbx)2Zr2O7 samples prepared at 1400 °C/3 h demonstrate a tight correlation with their catalytic activity towards propane cracking. The progressive replacement of Pr3+ with Yb3+ cations gives rise to an increase in the catalytic activity. A mechanism of the catalytic cracking of propane is proposed, which considers the geometrical match between the metal–oxygen (Pr–O, Yb–O, and Zr–O) bond lengths within the active sites and the size of adsorbed propane molecule to be the decisive factor governing the reaction route.

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“…Recently, it has been found that Y 2 O 3 improved the catalytic performance of the Ni-based catalysts more significantly than CeO 2 , mainly due to its good dehydrogenation ability. Besides, the Y 2 O 3 support can effectively disperse the active metal nanoparticles, , and Lewis acidic Y 3+ tends to capture the Lewis basic molecules (e.g., NH 3 ), − which will promote the decomposition of NH 3 . Furthermore, doping catalysts with Y species can precisely enhance the basicity of catalysts, , and the increase of catalysts’ basicity will improve the catalytic performance of ammonia decomposition. , Consequently, Y 2 O 3 could be a prospective composition for Ni-based catalysts.…”

Section: Introductionmentioning

confidence: 99%

Multicomponent Ni–Y₂O₃–Al₂O₃ Nanospheres as Highly Efficient Catalysts for the Ammonia Decomposition Reaction

Xu,

Wang,

et al. 2023

ACS Appl. Nano Mater.

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Ammonia is a promising hydrogen storage medium, and the catalytic decomposition of ammonia offers a route to clean hydrogen generation. Constructing efficient multicomponent catalysts with an appropriate choice of components is a feasible strategy to enhance the catalytic performance in ammonia decomposition. In this work, a series of multicomponent Ni–Y2O3–Al2O3 catalysts with a unique internal hollow spherical structure were synthesized by a facile aerosol-assisted self-assembly approach. Compared with the Ni–Y2O3 and Ni–Al2O3 catalysts, the Ni–Y2O3–Al2O3 catalysts exhibited a significant advantage in the catalytic performance of ammonia decomposition, and their activity remained stable during tests up to 100 h under very harsh reaction conditions (550 °C and space velocity of 60,000 mL·gcat –1·h–1), outperforming almost all Ni-based catalysts reported so far. Systematic characterizations demonstrated that Y2O3 effectively dispersed Ni nanoparticles, alleviated the poisoning effect of H2 on the catalysts, and provided sufficient basic sites to improve the catalytic activity. In addition, the introduction of Al2O3 further inhibited the aggregation of Ni and Y2O3 nanoparticles and maintained their high dispersion in the reaction. This work elucidates the contribution of different compositions in multicomponent catalysts and provides a strategy for the construction of efficient Ni-based ammonia decomposition catalysts.

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Yttrium Oxide Supported La2O3 Nanomaterials for Catalytic Oxidative Cracking of n-Propane to Olefins

Cited by 16 publications

References 40 publications

General Approach for Two-Dimensional Rare-Earth Oxyhalides with High Gate Dielectric Performance

General Approach for Two-Dimensional Rare-Earth Oxyhalides with High Gate Dielectric Performance

Influence of Synthesis Conditions on the Crystal, Local Atomic, Electronic Structure, and Catalytic Properties of (Pr1−xYbx)2Zr2O7 (0 ≤ x ≤ 1) Powders

Multicomponent Ni–Y₂O₃–Al₂O₃ Nanospheres as Highly Efficient Catalysts for the Ammonia Decomposition Reaction

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Yttrium Oxide Supported La2O3 Nanomaterials for Catalytic Oxidative Cracking of n-Propane to Olefins

Cited by 16 publications

References 40 publications

General Approach for Two-Dimensional Rare-Earth Oxyhalides with High Gate Dielectric Performance

General Approach for Two-Dimensional Rare-Earth Oxyhalides with High Gate Dielectric Performance

Influence of Synthesis Conditions on the Crystal, Local Atomic, Electronic Structure, and Catalytic Properties of (Pr1−xYbx)2Zr2O7 (0 ≤ x ≤ 1) Powders

Multicomponent Ni–Y2O3–Al2O3 Nanospheres as Highly Efficient Catalysts for the Ammonia Decomposition Reaction

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Multicomponent Ni–Y₂O₃–Al₂O₃ Nanospheres as Highly Efficient Catalysts for the Ammonia Decomposition Reaction