Catalytic characteristics of NASICON-type phosphates with rare earth elements in ethanol conversion

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Solid State Sciences Pub Date : 2025-02-18 DOI:10.1016/j.solidstatesciences.2025.107865

Elena A. Asabina , Anna I. Zhukova , Vladislav A. Sedov , Vladimir I. Pet'kov , Diana A. Osaulenko , Ekaterina B. Markova , Diana G. Fukina , Vitalii A. Koshkin

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Abstract

The study is dedicated to the investigation of the catalytic properties of

M_{0.33}^{3 +}

Ti₂(PO₄)₃ (M − La, Sm, Dy) phosphates in ethanol conversion reactions. The powder samples of the NASICON-type phosphates were synthesized by the Pechini technique. Their phase purity and structure characterization were performed using XRD, IR spectroscopy, SEM, BET and BJH methods. Structural data indicated that the transition from La to Dy was accompanied by a decrease in M − O bond lengths, which is compensated by longer neighboring Ti–O bonds, ultimately leading to greater distortion of the surrounding octahedra. The catalytic activity of M_0.33Ti₂(PO₄)₃ (M − La, Sm, Dy) phosphates has been studied in ethanol reforming reactions in the temperature range of 240–400 °C. The regularities of changes in the catalytic properties in the La→Sm→Dy series have been traced. The selectivity of ethanol conversion was found to depend on the phosphate composition. The best alcohol conversion was achieved on Dy-phosphate at 400 °C with an ethylene selectivity of 66 %.

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.