Peng-hui LI , Hui-xiang WANG , Jun-fen LI , Bao-liang LÜ
{"title":"Ga在Ga- wox /SBA-15上促进顺式环烯环氧化的作用","authors":"Peng-hui LI , Hui-xiang WANG , Jun-fen LI , Bao-liang LÜ","doi":"10.1016/S1872-5813(23)60350-0","DOIUrl":null,"url":null,"abstract":"<div><p>This article investigates the promoting effect of gallium (Ga) on the activity of Ga-WO<sub><em>x</em></sub>/SBA-15 catalyst for cis-cyclooctene epoxidation with H<sub>2</sub>O<sub>2</sub>. The optimal catalyst of 0.3Ga-WO<sub><em>x</em></sub>/SBA-15 offered a turnover frequency (TOF) of 112 h<sup>–1</sup>, which was nearly two times than that of WO<sub><em>x</em></sub>/SBA-15 (57 h<sup>–1</sup>). The low apparent reaction activation energy for 0.3Ga-WO<sub><em>x</em></sub>/SBA-15 (49.6 kJ/mol vs 64.0 kJ/mol for WO<sub><em>x</em></sub>/SBA-15) was also in line with its superior performance. Kinetic analysis demonstrated stronger adsorption of H<sub>2</sub>O<sub>2</sub> on 0.3Ga-WO<sub><em>x</em></sub>/SBA-15 surface, facilitating the H<sub>2</sub>O<sub>2</sub> activation. Based on the characterizations and catalytic performance, the improvement of Ga was attributed to the increase of Lewis acid sites and the enhancement of electrophilicity. Furthermore, the metal hydrogen peroxide (M-OOH) was identified as the primary intermediate.</p></div>","PeriodicalId":15956,"journal":{"name":"燃料化学学报","volume":"51 10","pages":"Pages 1453-1461"},"PeriodicalIF":0.0000,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Role of Ga in promoting epoxidation of cis-cyclooctene over Ga-WOx/SBA-15\",\"authors\":\"Peng-hui LI , Hui-xiang WANG , Jun-fen LI , Bao-liang LÜ\",\"doi\":\"10.1016/S1872-5813(23)60350-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This article investigates the promoting effect of gallium (Ga) on the activity of Ga-WO<sub><em>x</em></sub>/SBA-15 catalyst for cis-cyclooctene epoxidation with H<sub>2</sub>O<sub>2</sub>. The optimal catalyst of 0.3Ga-WO<sub><em>x</em></sub>/SBA-15 offered a turnover frequency (TOF) of 112 h<sup>–1</sup>, which was nearly two times than that of WO<sub><em>x</em></sub>/SBA-15 (57 h<sup>–1</sup>). The low apparent reaction activation energy for 0.3Ga-WO<sub><em>x</em></sub>/SBA-15 (49.6 kJ/mol vs 64.0 kJ/mol for WO<sub><em>x</em></sub>/SBA-15) was also in line with its superior performance. Kinetic analysis demonstrated stronger adsorption of H<sub>2</sub>O<sub>2</sub> on 0.3Ga-WO<sub><em>x</em></sub>/SBA-15 surface, facilitating the H<sub>2</sub>O<sub>2</sub> activation. Based on the characterizations and catalytic performance, the improvement of Ga was attributed to the increase of Lewis acid sites and the enhancement of electrophilicity. Furthermore, the metal hydrogen peroxide (M-OOH) was identified as the primary intermediate.</p></div>\",\"PeriodicalId\":15956,\"journal\":{\"name\":\"燃料化学学报\",\"volume\":\"51 10\",\"pages\":\"Pages 1453-1461\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"燃料化学学报\",\"FirstCategoryId\":\"1087\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1872581323603500\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"Energy\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"燃料化学学报","FirstCategoryId":"1087","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1872581323603500","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Energy","Score":null,"Total":0}
Role of Ga in promoting epoxidation of cis-cyclooctene over Ga-WOx/SBA-15
This article investigates the promoting effect of gallium (Ga) on the activity of Ga-WOx/SBA-15 catalyst for cis-cyclooctene epoxidation with H2O2. The optimal catalyst of 0.3Ga-WOx/SBA-15 offered a turnover frequency (TOF) of 112 h–1, which was nearly two times than that of WOx/SBA-15 (57 h–1). The low apparent reaction activation energy for 0.3Ga-WOx/SBA-15 (49.6 kJ/mol vs 64.0 kJ/mol for WOx/SBA-15) was also in line with its superior performance. Kinetic analysis demonstrated stronger adsorption of H2O2 on 0.3Ga-WOx/SBA-15 surface, facilitating the H2O2 activation. Based on the characterizations and catalytic performance, the improvement of Ga was attributed to the increase of Lewis acid sites and the enhancement of electrophilicity. Furthermore, the metal hydrogen peroxide (M-OOH) was identified as the primary intermediate.
期刊介绍：
Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.
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