Elena Y. Liberman, Elena I. Suvorova, Alexander Y. Vasil’kov, Anastasiia A. Voronova, Alexander. Y. Pereyaslavtsev, Tatiana V. Kon’kova
{"title":"一氧化碳氧化反应中使用各种 CeO2 前驱体制备的低银浓度 Ag/CeO2 催化剂","authors":"Elena Y. Liberman, Elena I. Suvorova, Alexander Y. Vasil’kov, Anastasiia A. Voronova, Alexander. Y. Pereyaslavtsev, Tatiana V. Kon’kova","doi":"10.1007/s10562-024-04774-z","DOIUrl":null,"url":null,"abstract":"<div><p>Ag/CeO<sub>2</sub> catalysts for the CO oxidation reaction were synthesized by the metal-vapor method. Highly dispersed cerium dioxide used as a carrier was obtained by precipitation of Ce<sup>+3</sup> ions with various (NH<sub>4</sub>OH, (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub> and H<sub>2</sub>C<sub>2</sub>O<sub>4</sub>) precipitators and subsequent calcination in an oxidizing atmosphere. CeO<sub>2</sub> particles were formed with different morphologies depending on the precipitator used. When using NH<sub>4</sub>OH, mainly spheroidal particles are formed, while the shape of platelets is typical for the use of H<sub>2</sub>C<sub>2</sub>O<sub>4</sub>. The samples were characterized by EDX, SEM, TEM, XPS, low-temperature nitrogen adsorption. Catalytic testing of the samples was carried out in an oxidation reaction using gas chromatography. It was found that the catalytic activity of the samples decreases in a series Ag/CeO<sub>2carb</sub> > Ag/CeO<sub>2oxal</sub> > Ag/CeO<sub>2hydr.</sub> Ag/CeO<sub>2oxal</sub> catalysts demonstrated relatively high activity and the most stable operation over 10 cycles.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 11","pages":"6144 - 6156"},"PeriodicalIF":2.3000,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Low Ag concentration Ag/CeO2 catalysts prepared with various CeO2 precursors in carbon monoxide oxidation reaction\",\"authors\":\"Elena Y. Liberman, Elena I. Suvorova, Alexander Y. Vasil’kov, Anastasiia A. Voronova, Alexander. Y. Pereyaslavtsev, Tatiana V. Kon’kova\",\"doi\":\"10.1007/s10562-024-04774-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Ag/CeO<sub>2</sub> catalysts for the CO oxidation reaction were synthesized by the metal-vapor method. Highly dispersed cerium dioxide used as a carrier was obtained by precipitation of Ce<sup>+3</sup> ions with various (NH<sub>4</sub>OH, (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub> and H<sub>2</sub>C<sub>2</sub>O<sub>4</sub>) precipitators and subsequent calcination in an oxidizing atmosphere. CeO<sub>2</sub> particles were formed with different morphologies depending on the precipitator used. When using NH<sub>4</sub>OH, mainly spheroidal particles are formed, while the shape of platelets is typical for the use of H<sub>2</sub>C<sub>2</sub>O<sub>4</sub>. The samples were characterized by EDX, SEM, TEM, XPS, low-temperature nitrogen adsorption. Catalytic testing of the samples was carried out in an oxidation reaction using gas chromatography. It was found that the catalytic activity of the samples decreases in a series Ag/CeO<sub>2carb</sub> > Ag/CeO<sub>2oxal</sub> > Ag/CeO<sub>2hydr.</sub> Ag/CeO<sub>2oxal</sub> catalysts demonstrated relatively high activity and the most stable operation over 10 cycles.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"154 11\",\"pages\":\"6144 - 6156\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-09-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-024-04774-z\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-024-04774-z","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Low Ag concentration Ag/CeO2 catalysts prepared with various CeO2 precursors in carbon monoxide oxidation reaction
Ag/CeO2 catalysts for the CO oxidation reaction were synthesized by the metal-vapor method. Highly dispersed cerium dioxide used as a carrier was obtained by precipitation of Ce+3 ions with various (NH4OH, (NH4)2CO3 and H2C2O4) precipitators and subsequent calcination in an oxidizing atmosphere. CeO2 particles were formed with different morphologies depending on the precipitator used. When using NH4OH, mainly spheroidal particles are formed, while the shape of platelets is typical for the use of H2C2O4. The samples were characterized by EDX, SEM, TEM, XPS, low-temperature nitrogen adsorption. Catalytic testing of the samples was carried out in an oxidation reaction using gas chromatography. It was found that the catalytic activity of the samples decreases in a series Ag/CeO2carb > Ag/CeO2oxal > Ag/CeO2hydr. Ag/CeO2oxal catalysts demonstrated relatively high activity and the most stable operation over 10 cycles.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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