探索 VTe2-VSe2 体系中 VwSeyTe2-y 混合晶体的结构和性质

IF 3.1 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Inorganics Pub Date : 2023-12-15 DOI:10.3390/inorganics11120481

Sophia Kurig, Fabian Ketter, Anne Frommelius, B. V. Hakala, J. van Leusen, Karen Friese, R. Dronskowski

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引用次数: 0

摘要

钒（IV）瑀材料在催化和能源转换相关应用中的应用越来越受到关注。由于 V-Se-Te 系统中尚未发现三元化合物，我们研究了在空间群 Pm1（编号 164）中结晶的三元 VwSeyTe2-y（w = 1.10，1.13；y = 0.42，0.72）相。利用陶瓷法获得了固溶体成分不同的两个单晶试样。所有产品都通过单晶或粉末 X 射线衍射进行了表征。与硒相比，碲阴离子的离子半径更大，因此晶格参数随着碲含量的增加而增加。能量色散 X 射线光谱法确认了化学成分。此外，磁性测量大多显示出反铁磁性。在氮气环境中同时进行的差示扫描量热法/热重分析表明，在形成 VN 的同时发生了内热分解。在氩气环境中观察到了 VSe 和 VTe 的分解。这项工作的结果可作为合成 V-Se-Te 和相关钒瑀体系新相的基础。

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Exploring the Structure and Properties of VwSeyTe2−y Mixed Crystals in the VTe2–VSe2 System

Vanadium (IV) chalcogenide materials are of increasing interest for use in catalysis and energy conversion-related applications. Since no ternary compounds are yet known in the V–Se–Te system, we studied ternary VwSeyTe2−y (w = 1.10, 1.13; y = 0.42, 0.72) phases crystallizing in space group Pm1 (no. 164). Two single-crystal specimens with differing compositions of a solid solution were obtained using the ceramic method. All products were characterized by either single-crystal or powder X-ray diffraction. The lattice parameters increase with rising tellurium content in accordance with the larger ionic radius of the tellurium anion compared to selenium. The chemical compositions were confirmed by energy-dispersive X-ray spectroscopy. Furthermore, magnetic measurements mostly revealed antiferromagnetic properties. Simultaneous differential scanning calorimetry/thermogravimetric analyses in a nitrogen atmosphere showed endothermic decomposition accompanied by the formation of VN. The decomposition of VSe and VTe was observed in an argon atmosphere. The results of this work can serve as a basis for the synthesis of new phases in the V–Se–Te and related vanadium chalcogenide systems.

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来源期刊

Inorganics Chemistry-Inorganic Chemistry

CiteScore

2.80

自引率

10.30%

发文量

193

审稿时长

6 weeks

期刊介绍： Inorganics is an open access journal that covers all aspects of inorganic chemistry research. Topics include but are not limited to: synthesis and characterization of inorganic compounds, complexes and materials structure and bonding in inorganic molecular and solid state compounds spectroscopic, magnetic, physical and chemical properties of inorganic compounds chemical reactivity, physical properties and applications of inorganic compounds and materials mechanisms of inorganic reactions organometallic compounds inorganic cluster chemistry heterogenous and homogeneous catalytic reactions promoted by inorganic compounds thermodynamics and kinetics of significant new and known inorganic compounds supramolecular systems and coordination polymers bio-inorganic chemistry and applications of inorganic compounds in biological systems and medicine environmental and sustainable energy applications of inorganic compounds and materials MD