Bohua Sun, Qianqian Li, Guijin Su, Maoyong Song, Chunyan Ma, Jiaxin Pang, Xu Zhao, Jing Meng, Bin Shi
{"title":"在具有可调缺陷的 Ru 负载刻面工程 {201}-TiO2 催化剂上可持续、高效地催化氧化氯化挥发性有机化合物","authors":"Bohua Sun, Qianqian Li, Guijin Su, Maoyong Song, Chunyan Ma, Jiaxin Pang, Xu Zhao, Jing Meng, Bin Shi","doi":"10.1016/j.apcatb.2024.124582","DOIUrl":null,"url":null,"abstract":"Sustainable and efficient catalytic oxidation of chlorinated volatile organic compounds (CVOCs) poses an enduring challenge. This bottleneck arises from the limited catalytic activity of redox reactions and chlorine desorption, causing catalyst deactivation and secondary pollution. Herein, our sound strategy involves Ru-loaded facet-engineered {201}-TiO with tuned defects, thereby boosting its reactivity. Comprehensive characterizations and DFT calculation manifested that Ru/{201}-TiO, with abundant oxygen vacancies, Ti defects, and robust metal-support interaction, enabled flexible electron transfer to activate O and the dissociation of HO, thus facilitating the continuous generation of reactive oxygen species (ROS), such as •O and hydroxyl species. These ROS effectively enhance chlorine desorption and chlorobenzene deep oxidation. Ru/{201}-TiO exhibited superior reactivity for chlorobenzene degradation, with an apparent activation energy (Ea) of 31.0 KJ/mol and 100 % chlorobenzene conversion in a 1000-min stability test, even with HO introduction. Ru/{201}-TiO produced 2.2–3.1 times fewer small-molecule chlorinated byproducts than Ru/{101}-TiO, with no polychlorinated benzenes detected.","PeriodicalId":516528,"journal":{"name":"Applied Catalysis B: Environment and Energy","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sustainable and efficient catalytic oxidation of chlorinated volatile organic compounds over Ru-loaded facet-engineered {201}-TiO2 catalyst with tuned defects\",\"authors\":\"Bohua Sun, Qianqian Li, Guijin Su, Maoyong Song, Chunyan Ma, Jiaxin Pang, Xu Zhao, Jing Meng, Bin Shi\",\"doi\":\"10.1016/j.apcatb.2024.124582\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Sustainable and efficient catalytic oxidation of chlorinated volatile organic compounds (CVOCs) poses an enduring challenge. This bottleneck arises from the limited catalytic activity of redox reactions and chlorine desorption, causing catalyst deactivation and secondary pollution. Herein, our sound strategy involves Ru-loaded facet-engineered {201}-TiO with tuned defects, thereby boosting its reactivity. Comprehensive characterizations and DFT calculation manifested that Ru/{201}-TiO, with abundant oxygen vacancies, Ti defects, and robust metal-support interaction, enabled flexible electron transfer to activate O and the dissociation of HO, thus facilitating the continuous generation of reactive oxygen species (ROS), such as •O and hydroxyl species. These ROS effectively enhance chlorine desorption and chlorobenzene deep oxidation. Ru/{201}-TiO exhibited superior reactivity for chlorobenzene degradation, with an apparent activation energy (Ea) of 31.0 KJ/mol and 100 % chlorobenzene conversion in a 1000-min stability test, even with HO introduction. Ru/{201}-TiO produced 2.2–3.1 times fewer small-molecule chlorinated byproducts than Ru/{101}-TiO, with no polychlorinated benzenes detected.\",\"PeriodicalId\":516528,\"journal\":{\"name\":\"Applied Catalysis B: Environment and Energy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Catalysis B: Environment and Energy\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1016/j.apcatb.2024.124582\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Catalysis B: Environment and Energy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.apcatb.2024.124582","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Sustainable and efficient catalytic oxidation of chlorinated volatile organic compounds over Ru-loaded facet-engineered {201}-TiO2 catalyst with tuned defects
Sustainable and efficient catalytic oxidation of chlorinated volatile organic compounds (CVOCs) poses an enduring challenge. This bottleneck arises from the limited catalytic activity of redox reactions and chlorine desorption, causing catalyst deactivation and secondary pollution. Herein, our sound strategy involves Ru-loaded facet-engineered {201}-TiO with tuned defects, thereby boosting its reactivity. Comprehensive characterizations and DFT calculation manifested that Ru/{201}-TiO, with abundant oxygen vacancies, Ti defects, and robust metal-support interaction, enabled flexible electron transfer to activate O and the dissociation of HO, thus facilitating the continuous generation of reactive oxygen species (ROS), such as •O and hydroxyl species. These ROS effectively enhance chlorine desorption and chlorobenzene deep oxidation. Ru/{201}-TiO exhibited superior reactivity for chlorobenzene degradation, with an apparent activation energy (Ea) of 31.0 KJ/mol and 100 % chlorobenzene conversion in a 1000-min stability test, even with HO introduction. Ru/{201}-TiO produced 2.2–3.1 times fewer small-molecule chlorinated byproducts than Ru/{101}-TiO, with no polychlorinated benzenes detected.
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