Infrared phonon modes and local structure of amorphous and crystalline LaLuO3 thin films

Wang, Yuyin; Qi, Zeming; Shao, Tao; Cheng, Xuerui; Zhang, Guobin; Li, Ting‐Ting; Li, Chengxiang; Pan, Guoqiang

doi:10.1016/j.jallcom.2013.03.240

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…0.8, compared with H 2 exposure temperature of room temperature. The peak intensities in the radial structure function are typically attenuated because of a reduced particle diameter (surface effect), , a smaller coordination number because of amorphization, , and disruptions of the thermal structure (Debye–Waller factors) . Thus, EXAFS fittings were carried out using an initial coordination number estimated from average particle size obtained by TEM observation.…”

Section: Resultsmentioning

confidence: 99%

Structure-Sensitivity Factors Based on Highly Active CO₂ Methanation Catalysts Prepared via the Polygonal Barrel-Sputtering Method

Inoue

Miyazaki

et al. 2020

J. Phys. Chem. C

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This study elucidates the factors reducing the CO 2 methanation reaction temperature of TiO 2 -supported Ru catalysts prepared via the polygonal barrel-sputtering method (Ru/TiO 2 (BS)) to investigate the structure-sensitivity mechanism. The smaller nanoparticles deposited in Ru/ TiO 2 (BS) (<4 nm) were amorphous RuO 2 because of air exposure after the preparation, and their surfaces were changed to island-shaped structures consisting of amorphous RuO 2 and amorphous Ru metal by H 2 exposure. In this case, dissociative hydrogen was also adsorbed in abundance on the amorphous Ru metals. Such hydrogen atoms were not observed in conventional Ru/TiO 2 catalysts. Under the supplied CO 2 + H 2 at a stoichiometric ratio of 1:4, these hydrogen atoms not only contributed to the generation of a unique CO intermediate (Ru−CO−Ru−H) from room temperature, but also reduced this CO adsorbate to methane even in low-temperature ranges (≤120 °C). These reaction steps were completely different from the reported mechanisms. Accordingly, the formation of amorphous Ru metals and the adsorption of hydrogen atoms on them are essential for reducing the CO 2 methanation temperature. These are key factors of structure-sensitivity, which would also be useful for improving activities of various catalysts.

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Section: Resultsmentioning

confidence: 99%

Structure-Sensitivity Factors Based on Highly Active CO₂ Methanation Catalysts Prepared via the Polygonal Barrel-Sputtering Method

Inoue

Miyazaki

et al. 2020

J. Phys. Chem. C

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Constructing interfacial path for enhancing mechanical and thermal performances of carbon fiber/cyanate ester resin composite

Zheng

Fei

et al. 2021

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Crystal chemistry, stability and properties of interlanthanide perovskites: A review

Artini¹

2017

Journal of the European Ceramic Society

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Infrared phonon modes and local structure of amorphous and crystalline LaLuO3 thin films

Cited by 4 publications

References 34 publications

Structure-Sensitivity Factors Based on Highly Active CO₂ Methanation Catalysts Prepared via the Polygonal Barrel-Sputtering Method

Structure-Sensitivity Factors Based on Highly Active CO₂ Methanation Catalysts Prepared via the Polygonal Barrel-Sputtering Method

Constructing interfacial path for enhancing mechanical and thermal performances of carbon fiber/cyanate ester resin composite

Crystal chemistry, stability and properties of interlanthanide perovskites: A review

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Infrared phonon modes and local structure of amorphous and crystalline LaLuO3 thin films

Cited by 4 publications

References 34 publications

Structure-Sensitivity Factors Based on Highly Active CO2 Methanation Catalysts Prepared via the Polygonal Barrel-Sputtering Method

Structure-Sensitivity Factors Based on Highly Active CO2 Methanation Catalysts Prepared via the Polygonal Barrel-Sputtering Method

Constructing interfacial path for enhancing mechanical and thermal performances of carbon fiber/cyanate ester resin composite

Crystal chemistry, stability and properties of interlanthanide perovskites: A review

Contact Info

Product

Resources

About

Structure-Sensitivity Factors Based on Highly Active CO₂ Methanation Catalysts Prepared via the Polygonal Barrel-Sputtering Method

Structure-Sensitivity Factors Based on Highly Active CO₂ Methanation Catalysts Prepared via the Polygonal Barrel-Sputtering Method