{"title":"硼修饰Ru催化剂的结构用于丙烷脱氢反应","authors":"","doi":"10.1016/j.fmre.2022.04.012","DOIUrl":null,"url":null,"abstract":"<div><div>Propane dehydrogenation (PDH) is an efficient technology for the direct production of propylene. Nevertheless, current PDH catalysts mainly rely on precious Pt or toxic Cr and especially undergo severe coke deposition. Herein, we report a Ru catalyst decorated by boron species (Ru-3B/Al<sub>2</sub>O<sub>3</sub>), which exhibits high catalytic performance for PDH. HAADF-STEM, EELS, and CO-FTIR characterization are used to identify the surface structure of the Ru active component, which shows that the high-energy unsaturated coordination sites, including corners, edges and step atoms for Ru-3B/Al<sub>2</sub>O<sub>3,</sub> are appropriately modified by BO<sub>x</sub> species. The encapsulation of high-energy active sites prone to C<img>C cracking and deep dehydrogenation leads to higher propylene selectivity (> 95%) and strong carbon resistance (<em>k<sub>d</sub></em> 0.0007 min) over Ru-3B/Al<sub>2</sub>O<sub>3</sub>. The XPS and H<sub>2</sub>-TPR results show that the migration of B species is driven by the reduction of B<sub>2</sub>O<sub>3</sub> to B<sub>2</sub>O<sub>2</sub> and that the coating degree of Ru particles is controlled by the chemical valance of Ru species.</div></div>","PeriodicalId":34602,"journal":{"name":"Fundamental Research","volume":null,"pages":null},"PeriodicalIF":6.2000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The structural decoration of Ru catalysts by boron for enhanced propane dehydrogenation\",\"authors\":\"\",\"doi\":\"10.1016/j.fmre.2022.04.012\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Propane dehydrogenation (PDH) is an efficient technology for the direct production of propylene. Nevertheless, current PDH catalysts mainly rely on precious Pt or toxic Cr and especially undergo severe coke deposition. Herein, we report a Ru catalyst decorated by boron species (Ru-3B/Al<sub>2</sub>O<sub>3</sub>), which exhibits high catalytic performance for PDH. HAADF-STEM, EELS, and CO-FTIR characterization are used to identify the surface structure of the Ru active component, which shows that the high-energy unsaturated coordination sites, including corners, edges and step atoms for Ru-3B/Al<sub>2</sub>O<sub>3,</sub> are appropriately modified by BO<sub>x</sub> species. The encapsulation of high-energy active sites prone to C<img>C cracking and deep dehydrogenation leads to higher propylene selectivity (> 95%) and strong carbon resistance (<em>k<sub>d</sub></em> 0.0007 min) over Ru-3B/Al<sub>2</sub>O<sub>3</sub>. The XPS and H<sub>2</sub>-TPR results show that the migration of B species is driven by the reduction of B<sub>2</sub>O<sub>3</sub> to B<sub>2</sub>O<sub>2</sub> and that the coating degree of Ru particles is controlled by the chemical valance of Ru species.</div></div>\",\"PeriodicalId\":34602,\"journal\":{\"name\":\"Fundamental Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.2000,\"publicationDate\":\"2024-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fundamental Research\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2667325822001935\",\"RegionNum\":3,\"RegionCategory\":\"综合性期刊\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Multidisciplinary\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fundamental Research","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2667325822001935","RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Multidisciplinary","Score":null,"Total":0}
The structural decoration of Ru catalysts by boron for enhanced propane dehydrogenation
Propane dehydrogenation (PDH) is an efficient technology for the direct production of propylene. Nevertheless, current PDH catalysts mainly rely on precious Pt or toxic Cr and especially undergo severe coke deposition. Herein, we report a Ru catalyst decorated by boron species (Ru-3B/Al2O3), which exhibits high catalytic performance for PDH. HAADF-STEM, EELS, and CO-FTIR characterization are used to identify the surface structure of the Ru active component, which shows that the high-energy unsaturated coordination sites, including corners, edges and step atoms for Ru-3B/Al2O3, are appropriately modified by BOx species. The encapsulation of high-energy active sites prone to CC cracking and deep dehydrogenation leads to higher propylene selectivity (> 95%) and strong carbon resistance (kd 0.0007 min) over Ru-3B/Al2O3. The XPS and H2-TPR results show that the migration of B species is driven by the reduction of B2O3 to B2O2 and that the coating degree of Ru particles is controlled by the chemical valance of Ru species.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
