{"title":"The Effect of Platinum Single Atoms in Titania for Photocatalytic Applications","authors":"C. A. G. Bezerra, D. Mamedov, N. Alonso-Vante","doi":"10.1595/205651324x17042087562424","DOIUrl":null,"url":null,"abstract":"The photocatalytic effect of titania has long been studied with respect to water oxidation and hydrogen evolution. At present, the modification of this semiconducting material by platinum single atoms (Pt-SAs) represents an interesting approach that has been developed in the past decade and has given good results in the photocatalytic hydrogen evolution reaction (HER). Experimental studies have shown that the deposition of Pt-SAs on the titania surface, in aqueous systems, is a spontaneous process and can also be promoted by different reducing processes. Theoretical studies suggest that this deposition is a site-specific reaction, which occurs in oxygen vacancies on the titania surface. Under such conditions, the Pt-SAs are not in a metallic state, due to the interaction with neighbouring atoms of the substrate. This complex system can be probed using different advanced characterisation techniques, which provide a deeper understanding about the modified surface and how this modification improves the photocatalytic performance of titania.","PeriodicalId":14807,"journal":{"name":"Johnson Matthey Technology Review","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Johnson Matthey Technology Review","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1595/205651324x17042087562424","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The photocatalytic effect of titania has long been studied with respect to water oxidation and hydrogen evolution. At present, the modification of this semiconducting material by platinum single atoms (Pt-SAs) represents an interesting approach that has been developed in the past decade and has given good results in the photocatalytic hydrogen evolution reaction (HER). Experimental studies have shown that the deposition of Pt-SAs on the titania surface, in aqueous systems, is a spontaneous process and can also be promoted by different reducing processes. Theoretical studies suggest that this deposition is a site-specific reaction, which occurs in oxygen vacancies on the titania surface. Under such conditions, the Pt-SAs are not in a metallic state, due to the interaction with neighbouring atoms of the substrate. This complex system can be probed using different advanced characterisation techniques, which provide a deeper understanding about the modified surface and how this modification improves the photocatalytic performance of titania.
期刊介绍:
Johnson Matthey Technology Review publishes articles, reviews and short reports on science enabling cleaner air, good health and efficient use of natural resources. Areas of application and fundamental science will be considered in the fields of:Advanced materials[...]Catalysis[...][...]Characterisation[...]Electrochemistry[...]Emissions control[...]Fine and speciality chemicals[...]Historical[...]Industrial processes[...]Materials and metallurgy[...]Modelling[...]PGM and specialist metallurgy[...]Pharmaceutical and medical science[...]Surface chemistry and coatings[...]Sustainable technologies.