{"title":"NOx和负载RuO2在RuO2/ CeO2-ZrO2上加速烟尘氧化中的作用","authors":"Hitoshi Kubo , Yusuke Ohshima , Shunsuke Kato , Noriyuki Saitoh , Noriko Yoshizawa , Osamu Nakagoe , Shuji Tanabe","doi":"10.1016/j.apcata.2025.120144","DOIUrl":null,"url":null,"abstract":"<div><div>RuO<sub>2</sub>/CeO<sub>2</sub>–ZrO<sub>2</sub> (Ru/CZ) shows high activity for soot oxidation in a NO<sub>2</sub>/O<sub>2</sub> flow. The soot oxidation occurred at the soot-Ru/CZ interface and at the soot surface. It was shown that RuO<sub>2</sub> increases the Ce<sup>3 +</sup>/Ce in CZ surface, and that dissociates the adsorbed O<sub>2</sub> and supplies O atoms to CZ support. Adsorbed-NO<sub>3</sub> (ad-NO<sub>3</sub>) contributed more than gaseous NO<sub>2</sub> to soot oxidation. The investigation of activation energy and outlet NO<sub>x</sub> gas suggested that ad-NO<sub>3</sub> ignited soot, and then CZ lattice oxygen and reactive oxygen species derived from CZ support mainly oxidized soot. Although the molar ratio of ad-NO<sub>3</sub>/soot was only 1 %, ad-NO<sub>3</sub> accelerated soot oxidation. This was implied to be because ad-NO<sub>3</sub> oxidizes soot through the redox cycle between ad-NO<sub>2</sub> and ad-NO<sub>3</sub> by CZ lattice oxygen. Soot oxidation over Ru/CZ is believed to be accelerated by the synergistic effect of the O<sub>2</sub> dissociation by RuO<sub>2</sub> and the ignition of soot by ad-NO<sub>3</sub>.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"693 ","pages":"Article 120144"},"PeriodicalIF":4.8000,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Roles of NOx and the supported RuO2 in accelerating soot oxidation over RuO2/CeO2–ZrO2\",\"authors\":\"Hitoshi Kubo , Yusuke Ohshima , Shunsuke Kato , Noriyuki Saitoh , Noriko Yoshizawa , Osamu Nakagoe , Shuji Tanabe\",\"doi\":\"10.1016/j.apcata.2025.120144\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>RuO<sub>2</sub>/CeO<sub>2</sub>–ZrO<sub>2</sub> (Ru/CZ) shows high activity for soot oxidation in a NO<sub>2</sub>/O<sub>2</sub> flow. The soot oxidation occurred at the soot-Ru/CZ interface and at the soot surface. It was shown that RuO<sub>2</sub> increases the Ce<sup>3 +</sup>/Ce in CZ surface, and that dissociates the adsorbed O<sub>2</sub> and supplies O atoms to CZ support. Adsorbed-NO<sub>3</sub> (ad-NO<sub>3</sub>) contributed more than gaseous NO<sub>2</sub> to soot oxidation. The investigation of activation energy and outlet NO<sub>x</sub> gas suggested that ad-NO<sub>3</sub> ignited soot, and then CZ lattice oxygen and reactive oxygen species derived from CZ support mainly oxidized soot. Although the molar ratio of ad-NO<sub>3</sub>/soot was only 1 %, ad-NO<sub>3</sub> accelerated soot oxidation. This was implied to be because ad-NO<sub>3</sub> oxidizes soot through the redox cycle between ad-NO<sub>2</sub> and ad-NO<sub>3</sub> by CZ lattice oxygen. Soot oxidation over Ru/CZ is believed to be accelerated by the synergistic effect of the O<sub>2</sub> dissociation by RuO<sub>2</sub> and the ignition of soot by ad-NO<sub>3</sub>.</div></div>\",\"PeriodicalId\":243,\"journal\":{\"name\":\"Applied Catalysis A: General\",\"volume\":\"693 \",\"pages\":\"Article 120144\"},\"PeriodicalIF\":4.8000,\"publicationDate\":\"2025-03-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Catalysis A: General\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0926860X25000456\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/1/28 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Catalysis A: General","FirstCategoryId":"1","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0926860X25000456","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/28 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Roles of NOx and the supported RuO2 in accelerating soot oxidation over RuO2/CeO2–ZrO2
RuO2/CeO2–ZrO2 (Ru/CZ) shows high activity for soot oxidation in a NO2/O2 flow. The soot oxidation occurred at the soot-Ru/CZ interface and at the soot surface. It was shown that RuO2 increases the Ce3 +/Ce in CZ surface, and that dissociates the adsorbed O2 and supplies O atoms to CZ support. Adsorbed-NO3 (ad-NO3) contributed more than gaseous NO2 to soot oxidation. The investigation of activation energy and outlet NOx gas suggested that ad-NO3 ignited soot, and then CZ lattice oxygen and reactive oxygen species derived from CZ support mainly oxidized soot. Although the molar ratio of ad-NO3/soot was only 1 %, ad-NO3 accelerated soot oxidation. This was implied to be because ad-NO3 oxidizes soot through the redox cycle between ad-NO2 and ad-NO3 by CZ lattice oxygen. Soot oxidation over Ru/CZ is believed to be accelerated by the synergistic effect of the O2 dissociation by RuO2 and the ignition of soot by ad-NO3.
期刊介绍：
Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications.
Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.
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
