{"title":"调整用于催化燃烧甲苯的 CeO2 基催化剂的储氧能力和释氧特性","authors":"","doi":"10.1016/j.mcat.2024.114527","DOIUrl":null,"url":null,"abstract":"<div><p>CeO<sub>2</sub> with varied doping transition metal was investigated to understand the oxygen storage capacity and oxygen release property of CeO<sub>2</sub>-based catalysts for toluene combustion. The order of catalytic activity was as follows: CuCeO<em><sub>x</sub></em> ≈ CoCeO<em><sub>x</sub></em> > MnCeO<em><sub>x</sub></em> > FeCeO<em><sub>x</sub></em> > NiCeO<em><sub>x</sub></em> > ZrCeO<em><sub>x</sub></em> > CeO<sub>2</sub>. Kinetic studies showed that the reaction on CuCeO<em><sub>x</sub></em> proceed via an MvK mechanism and the oxygen of catalyst was crucial factor for the toluene combustion. H<sub>2</sub>-TPR and XPS showed the addition of transition metal to CeO<sub>2</sub> could modify the surface lattice oxygen. Moreover, the oxygen storage capacity and oxygen release properties showed the transition metal additive not only change the amount of oxygen, but also affect the oxygen mobility. A linear relationship was observed between the catalytic activity and oxygen storage capacity. Diffuse reflectance infrared fourier transform spectroscopy showed the toluene first adsorbed on the surface of catalyst, and then reacted with oxygen of catalyst to form benzyl, benzoate and benzyl carbonate species. All these results provided a new strategy to develop high performance catalyst.</p></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":null,"pages":null},"PeriodicalIF":3.9000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Tuning the oxygen storage capacity and oxygen release properties of CeO2-based catalysts for catalytic combustion of toluene\",\"authors\":\"\",\"doi\":\"10.1016/j.mcat.2024.114527\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>CeO<sub>2</sub> with varied doping transition metal was investigated to understand the oxygen storage capacity and oxygen release property of CeO<sub>2</sub>-based catalysts for toluene combustion. The order of catalytic activity was as follows: CuCeO<em><sub>x</sub></em> ≈ CoCeO<em><sub>x</sub></em> > MnCeO<em><sub>x</sub></em> > FeCeO<em><sub>x</sub></em> > NiCeO<em><sub>x</sub></em> > ZrCeO<em><sub>x</sub></em> > CeO<sub>2</sub>. Kinetic studies showed that the reaction on CuCeO<em><sub>x</sub></em> proceed via an MvK mechanism and the oxygen of catalyst was crucial factor for the toluene combustion. H<sub>2</sub>-TPR and XPS showed the addition of transition metal to CeO<sub>2</sub> could modify the surface lattice oxygen. Moreover, the oxygen storage capacity and oxygen release properties showed the transition metal additive not only change the amount of oxygen, but also affect the oxygen mobility. A linear relationship was observed between the catalytic activity and oxygen storage capacity. Diffuse reflectance infrared fourier transform spectroscopy showed the toluene first adsorbed on the surface of catalyst, and then reacted with oxygen of catalyst to form benzyl, benzoate and benzyl carbonate species. All these results provided a new strategy to develop high performance catalyst.</p></div>\",\"PeriodicalId\":393,\"journal\":{\"name\":\"Molecular Catalysis\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2024-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Molecular Catalysis\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2468823124007090\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecular Catalysis","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2468823124007090","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Tuning the oxygen storage capacity and oxygen release properties of CeO2-based catalysts for catalytic combustion of toluene
CeO2 with varied doping transition metal was investigated to understand the oxygen storage capacity and oxygen release property of CeO2-based catalysts for toluene combustion. The order of catalytic activity was as follows: CuCeOx ≈ CoCeOx > MnCeOx > FeCeOx > NiCeOx > ZrCeOx > CeO2. Kinetic studies showed that the reaction on CuCeOx proceed via an MvK mechanism and the oxygen of catalyst was crucial factor for the toluene combustion. H2-TPR and XPS showed the addition of transition metal to CeO2 could modify the surface lattice oxygen. Moreover, the oxygen storage capacity and oxygen release properties showed the transition metal additive not only change the amount of oxygen, but also affect the oxygen mobility. A linear relationship was observed between the catalytic activity and oxygen storage capacity. Diffuse reflectance infrared fourier transform spectroscopy showed the toluene first adsorbed on the surface of catalyst, and then reacted with oxygen of catalyst to form benzyl, benzoate and benzyl carbonate species. All these results provided a new strategy to develop high performance catalyst.
期刊介绍:
Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are:
Heterogeneous catalysis including immobilized molecular catalysts
Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis
Photo- and electrochemistry
Theoretical aspects of catalysis analyzed by computational methods