E. V. Matus, E. N. Kovalenko, A. V. Kapishnikov, A. A. Leonova, A. P. Nikitin, O. A. Stonkus, V. A. Ushakov, S. A. Yashnik, O. B. Sukhova, M. A. Kerzhentsev
{"title":"块状和氧化铝支撑 Ce1-xNixOy 氧化物结构特性的比较研究","authors":"E. V. Matus, E. N. Kovalenko, A. V. Kapishnikov, A. A. Leonova, A. P. Nikitin, O. A. Stonkus, V. A. Ushakov, S. A. Yashnik, O. B. Sukhova, M. A. Kerzhentsev","doi":"10.1134/S0022476624090026","DOIUrl":null,"url":null,"abstract":"<p>A comparative analysis of the properties of bulk and aluminum oxide supported Ce<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub>O<sub><i>y</i></sub> oxides (<i>x</i> = 0.2-0.8; <i>y</i> = 1.2-1.8) exhibiting catalytic activity in reforming reactions is performed using a complex of physical and chemical methods (thermal analysis, low-temperature nitrogen adsorption, powder XRD, Raman spectroscopy, electron microscopy, hydrogen temperature-programmed reduction). It is shown that the obtained samples are mesoporous materials with a specific surface area of 100±10 m<sup>2</sup>/g, containing substitutional solid solutions with fluorite cubic structure in their composition. In contrast to bulk Ce<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub>O<sub><i>y</i></sub> complex oxide samples, the Ce<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub>O<sub><i>y</i></sub>/Al<sub>2</sub>O<sub>3</sub> material exhibits resistance to sintering during high temperature treatments in the course of activation and the subsequent reaction. At the same time, the formation temperature of metal Ni particles increases (540 °C vs. 350 °C) and the dispersion of the Ni<sup>0</sup> phase after the reaction is preserved (6.5 nm vs. 50 nm). A relationship between characteristics of these materials and their functional properties is revealed.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"65 9","pages":"1692 - 1706"},"PeriodicalIF":1.2000,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Comparative Study of Structural Properties of Bulk and Aluminum Oxide Supported Ce1–xNixOy Oxides\",\"authors\":\"E. V. Matus, E. N. Kovalenko, A. V. Kapishnikov, A. A. Leonova, A. P. Nikitin, O. A. Stonkus, V. A. Ushakov, S. A. Yashnik, O. B. Sukhova, M. A. Kerzhentsev\",\"doi\":\"10.1134/S0022476624090026\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>A comparative analysis of the properties of bulk and aluminum oxide supported Ce<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub>O<sub><i>y</i></sub> oxides (<i>x</i> = 0.2-0.8; <i>y</i> = 1.2-1.8) exhibiting catalytic activity in reforming reactions is performed using a complex of physical and chemical methods (thermal analysis, low-temperature nitrogen adsorption, powder XRD, Raman spectroscopy, electron microscopy, hydrogen temperature-programmed reduction). It is shown that the obtained samples are mesoporous materials with a specific surface area of 100±10 m<sup>2</sup>/g, containing substitutional solid solutions with fluorite cubic structure in their composition. In contrast to bulk Ce<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub>O<sub><i>y</i></sub> complex oxide samples, the Ce<sub>1–<i>x</i></sub>Ni<sub><i>x</i></sub>O<sub><i>y</i></sub>/Al<sub>2</sub>O<sub>3</sub> material exhibits resistance to sintering during high temperature treatments in the course of activation and the subsequent reaction. At the same time, the formation temperature of metal Ni particles increases (540 °C vs. 350 °C) and the dispersion of the Ni<sup>0</sup> phase after the reaction is preserved (6.5 nm vs. 50 nm). A relationship between characteristics of these materials and their functional properties is revealed.</p>\",\"PeriodicalId\":668,\"journal\":{\"name\":\"Journal of Structural Chemistry\",\"volume\":\"65 9\",\"pages\":\"1692 - 1706\"},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2024-10-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Structural Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0022476624090026\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Structural Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0022476624090026","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Comparative Study of Structural Properties of Bulk and Aluminum Oxide Supported Ce1–xNixOy Oxides
A comparative analysis of the properties of bulk and aluminum oxide supported Ce1–xNixOy oxides (x = 0.2-0.8; y = 1.2-1.8) exhibiting catalytic activity in reforming reactions is performed using a complex of physical and chemical methods (thermal analysis, low-temperature nitrogen adsorption, powder XRD, Raman spectroscopy, electron microscopy, hydrogen temperature-programmed reduction). It is shown that the obtained samples are mesoporous materials with a specific surface area of 100±10 m2/g, containing substitutional solid solutions with fluorite cubic structure in their composition. In contrast to bulk Ce1–xNixOy complex oxide samples, the Ce1–xNixOy/Al2O3 material exhibits resistance to sintering during high temperature treatments in the course of activation and the subsequent reaction. At the same time, the formation temperature of metal Ni particles increases (540 °C vs. 350 °C) and the dispersion of the Ni0 phase after the reaction is preserved (6.5 nm vs. 50 nm). A relationship between characteristics of these materials and their functional properties is revealed.
期刊介绍：
Journal is an interdisciplinary publication covering all aspects of structural chemistry, including the theory of molecular structure and chemical bond; the use of physical methods to study the electronic and spatial structure of chemical species; structural features of liquids, solutions, surfaces, supramolecular systems, nano- and solid materials; and the crystal structure of solids.
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