{"title":"Effect of TiO2 Crystal Facet on Pd/Anatase Catalysts for Formaldehyde Oxidation","authors":"","doi":"10.1007/s11244-024-01943-7","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>Crystal facet engineering is an effective strategy for designing efficient catalysts to improve the ability to oxidize formaldehyde (HCHO). In this article, anatase TiO<sub>2</sub> samples with different main exposed crystal facets ((001), (010) and (101)) were prepared and utilized as supports to load Pd, leading to the synthesis of Pd/TiO<sub>2</sub> (001), Pd/TiO<sub>2</sub> (010) and Pd/TiO<sub>2</sub> (101) catalysts, respectively. For HCHO oxidation, Pd/TiO<sub>2</sub> (001) displayed the best activity, and could convert 100% HCHO at 35 °C. However, the removal rates for Pd/TiO<sub>2</sub> (010) and Pd/TiO<sub>2</sub> (101) catalysts were only 46% and 35% even at 55 °C. After carefully comparing the property differences of these three supports, it was found that more surface defects were formed on the (001) facet than on (010) and (101). With more surface defects of support, Pd/TiO<sub>2</sub> (001) catalyst possessed more oxygen vacancies, Pd metal sites and interface sites, which could effectively activate oxygen and water. This further improved the ability to oxidize HCHO. The findings from this study are anticipated to contribute valuable insights for the design of highly efficient supported noble metal catalysts.</p> <span> <h3>Graphical Abstract</h3> <p> <span> <span> <img alt=\"\" src=\"https://static-content.springer.com/image/MediaObjects/11244_2024_1943_Figa_HTML.png\"/> </span> </span></p> </span>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"36 1","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Topics in Catalysis","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1007/s11244-024-01943-7","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Crystal facet engineering is an effective strategy for designing efficient catalysts to improve the ability to oxidize formaldehyde (HCHO). In this article, anatase TiO2 samples with different main exposed crystal facets ((001), (010) and (101)) were prepared and utilized as supports to load Pd, leading to the synthesis of Pd/TiO2 (001), Pd/TiO2 (010) and Pd/TiO2 (101) catalysts, respectively. For HCHO oxidation, Pd/TiO2 (001) displayed the best activity, and could convert 100% HCHO at 35 °C. However, the removal rates for Pd/TiO2 (010) and Pd/TiO2 (101) catalysts were only 46% and 35% even at 55 °C. After carefully comparing the property differences of these three supports, it was found that more surface defects were formed on the (001) facet than on (010) and (101). With more surface defects of support, Pd/TiO2 (001) catalyst possessed more oxygen vacancies, Pd metal sites and interface sites, which could effectively activate oxygen and water. This further improved the ability to oxidize HCHO. The findings from this study are anticipated to contribute valuable insights for the design of highly efficient supported noble metal catalysts.
期刊介绍：
Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief.
The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
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