{"title":"氧化铈纳米粒子作为氧载体在化学环化过程中的降解行为","authors":"Daiki Takahashi, Akira Yoko, Gimyeong Seong, Kazuyuki Iwase, Tadafumi Adschiri and Takaaki Tomai*, ","doi":"10.1021/acsanm.4c06966","DOIUrl":null,"url":null,"abstract":"<p >In this study, we investigated the degradation behavior of CeO<sub>2</sub>-based nanoparticles as oxygen carriers for the chemical looping process. In the investigation of the dependency of the reaction gases on the degradation in terms of changes in the CeO<sub>2</sub> crystallite, H<sub>2</sub>O and H<sub>2</sub> caused the most significant increase in the crystallite size (sintering) compared with other gases. It was found that Pt decoration, a well-known method for the enhancement of performance as an oxygen carrier, was effective in suppressing the sintering in various reaction gases. On the other hand, mixing with ZrO<sub>2</sub> nanoparticles that are not reactive as oxygen carriers also improves the durability of CeO<sub>2</sub>. The sintering-prevention effect of mixing ZrO<sub>2</sub> nanoparticles as nano-obstacles also contributes to exploiting the intrinsic catalytic activity of CeO<sub>2</sub> nanoparticles. Mixing with other nanomaterials would be a universal strategy for improving the durability and activity of thermodynamically unstable nanocatalysts.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 8","pages":"4040–4046 4040–4046"},"PeriodicalIF":5.8000,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsanm.4c06966","citationCount":"0","resultStr":"{\"title\":\"Degradation Behavior of CeO2-Based Nanoparticles as Oxygen Carriers for the Chemical Looping Process\",\"authors\":\"Daiki Takahashi, Akira Yoko, Gimyeong Seong, Kazuyuki Iwase, Tadafumi Adschiri and Takaaki Tomai*, \",\"doi\":\"10.1021/acsanm.4c06966\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >In this study, we investigated the degradation behavior of CeO<sub>2</sub>-based nanoparticles as oxygen carriers for the chemical looping process. In the investigation of the dependency of the reaction gases on the degradation in terms of changes in the CeO<sub>2</sub> crystallite, H<sub>2</sub>O and H<sub>2</sub> caused the most significant increase in the crystallite size (sintering) compared with other gases. It was found that Pt decoration, a well-known method for the enhancement of performance as an oxygen carrier, was effective in suppressing the sintering in various reaction gases. On the other hand, mixing with ZrO<sub>2</sub> nanoparticles that are not reactive as oxygen carriers also improves the durability of CeO<sub>2</sub>. The sintering-prevention effect of mixing ZrO<sub>2</sub> nanoparticles as nano-obstacles also contributes to exploiting the intrinsic catalytic activity of CeO<sub>2</sub> nanoparticles. Mixing with other nanomaterials would be a universal strategy for improving the durability and activity of thermodynamically unstable nanocatalysts.</p>\",\"PeriodicalId\":6,\"journal\":{\"name\":\"ACS Applied Nano Materials\",\"volume\":\"8 8\",\"pages\":\"4040–4046 4040–4046\"},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2025-02-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://pubs.acs.org/doi/epdf/10.1021/acsanm.4c06966\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Applied Nano Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsanm.4c06966\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Nano Materials","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsanm.4c06966","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Degradation Behavior of CeO2-Based Nanoparticles as Oxygen Carriers for the Chemical Looping Process
In this study, we investigated the degradation behavior of CeO2-based nanoparticles as oxygen carriers for the chemical looping process. In the investigation of the dependency of the reaction gases on the degradation in terms of changes in the CeO2 crystallite, H2O and H2 caused the most significant increase in the crystallite size (sintering) compared with other gases. It was found that Pt decoration, a well-known method for the enhancement of performance as an oxygen carrier, was effective in suppressing the sintering in various reaction gases. On the other hand, mixing with ZrO2 nanoparticles that are not reactive as oxygen carriers also improves the durability of CeO2. The sintering-prevention effect of mixing ZrO2 nanoparticles as nano-obstacles also contributes to exploiting the intrinsic catalytic activity of CeO2 nanoparticles. Mixing with other nanomaterials would be a universal strategy for improving the durability and activity of thermodynamically unstable nanocatalysts.
期刊介绍：
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.
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