{"title":"Pt纳米颗粒的尺寸决定了蒸汽处理对其催化CO氧化性能的影响","authors":"Liyuan Chen, , , Yumeng Xu, , , Yong Zheng, , , Fei Huang*, , and , Ying Zheng, ","doi":"10.1021/acsanm.5c03400","DOIUrl":null,"url":null,"abstract":"<p >CO oxidation catalyzed by Pt group metal nanoparticle catalysts is an important reaction in many fields, such as the operation of fuel cells and automotive exhaust gas alleviation. However, improving resistance to poisoning by H<sub>2</sub>O or CO<sub>2</sub>, which are present in feed gas or exhaust gas, is still a great challenge for Pt catalysts. Herein, by employing hexaaluminate (BaFeAl<sub>11</sub>O<sub>19</sub>, denoted as H) as a support, a correlation between the size of Pt nanoparticles and the effect of steam treatment (7 vol % H<sub>2</sub>O, 500 °C 1 h) was found. The aged Pt nanoparticle catalysts with a size above 1.0 nm (1Pt/H-A) exhibited enhanced catalytic activity, cycling stability, and resistance to H<sub>2</sub>O and CO<sub>2</sub> poisoning in CO oxidation compared with the fresh counterpart (1Pt/H). By contrast, there was a negligible change in physicochemical properties and catalytic performance over Pt nanocluster catalysts (<1.0 nm) before and after the treatment (0.5Pt/H vs 0.5Pt/H-A). Such a promoting effect can be attributed to enhanced metal–support interaction after the steam treatment, which induced an electronic effect on Pt nanoparticles and improved oxygen reactivity for CO oxidation.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 40","pages":"19422–19432"},"PeriodicalIF":5.5000,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Size of Pt Nanoparticles Determines the Effect of Steam Treatment on Their Performance for Catalytic CO Oxidation\",\"authors\":\"Liyuan Chen, , , Yumeng Xu, , , Yong Zheng, , , Fei Huang*, , and , Ying Zheng, \",\"doi\":\"10.1021/acsanm.5c03400\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >CO oxidation catalyzed by Pt group metal nanoparticle catalysts is an important reaction in many fields, such as the operation of fuel cells and automotive exhaust gas alleviation. However, improving resistance to poisoning by H<sub>2</sub>O or CO<sub>2</sub>, which are present in feed gas or exhaust gas, is still a great challenge for Pt catalysts. Herein, by employing hexaaluminate (BaFeAl<sub>11</sub>O<sub>19</sub>, denoted as H) as a support, a correlation between the size of Pt nanoparticles and the effect of steam treatment (7 vol % H<sub>2</sub>O, 500 °C 1 h) was found. The aged Pt nanoparticle catalysts with a size above 1.0 nm (1Pt/H-A) exhibited enhanced catalytic activity, cycling stability, and resistance to H<sub>2</sub>O and CO<sub>2</sub> poisoning in CO oxidation compared with the fresh counterpart (1Pt/H). By contrast, there was a negligible change in physicochemical properties and catalytic performance over Pt nanocluster catalysts (<1.0 nm) before and after the treatment (0.5Pt/H vs 0.5Pt/H-A). Such a promoting effect can be attributed to enhanced metal–support interaction after the steam treatment, which induced an electronic effect on Pt nanoparticles and improved oxygen reactivity for CO oxidation.</p>\",\"PeriodicalId\":6,\"journal\":{\"name\":\"ACS Applied Nano Materials\",\"volume\":\"8 40\",\"pages\":\"19422–19432\"},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2025-09-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Applied Nano Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsanm.5c03400\",\"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.5c03400","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}
Size of Pt Nanoparticles Determines the Effect of Steam Treatment on Their Performance for Catalytic CO Oxidation
CO oxidation catalyzed by Pt group metal nanoparticle catalysts is an important reaction in many fields, such as the operation of fuel cells and automotive exhaust gas alleviation. However, improving resistance to poisoning by H2O or CO2, which are present in feed gas or exhaust gas, is still a great challenge for Pt catalysts. Herein, by employing hexaaluminate (BaFeAl11O19, denoted as H) as a support, a correlation between the size of Pt nanoparticles and the effect of steam treatment (7 vol % H2O, 500 °C 1 h) was found. The aged Pt nanoparticle catalysts with a size above 1.0 nm (1Pt/H-A) exhibited enhanced catalytic activity, cycling stability, and resistance to H2O and CO2 poisoning in CO oxidation compared with the fresh counterpart (1Pt/H). By contrast, there was a negligible change in physicochemical properties and catalytic performance over Pt nanocluster catalysts (<1.0 nm) before and after the treatment (0.5Pt/H vs 0.5Pt/H-A). Such a promoting effect can be attributed to enhanced metal–support interaction after the steam treatment, which induced an electronic effect on Pt nanoparticles and improved oxygen reactivity for CO oxidation.
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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