Nazila Masoud, Tomas Partsch, Krijn P. de Jong, Petra E. de Jongh
{"title":"Thermal stability of oxide-supported gold nanoparticles","authors":"Nazila Masoud, Tomas Partsch, Krijn P. de Jong, Petra E. de Jongh","doi":"10.1007/s13404-019-00259-9","DOIUrl":null,"url":null,"abstract":"<p>In this study, we report on the influence of support and gas atmosphere on the thermal stability of Au nanoparticles on oxidic supports. All samples were prepared with a modified impregnation method and have initial Au particle sizes in the range of 3–4?nm. We observed that in air, Au nanoparticles on SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> are thermally much more stable than Au nanoparticles on TiO<sub>2</sub>. For instance, upon treatment up to 700?°C, on SiO<sub>2</sub>, Au particles grew from 4 to 6?nm while on TiO<sub>2</sub> from 3 to 13?nm. For Au nanoparticles on TiO<sub>2</sub>, growth is accelerated by oxidizing atmospheres and the presence of water and/or chloride. On non-reducible supports and in non-oxidizing atmosphere, the supported Au nanoparticles were remarkably stable. The insight into the growth of oxide-supported Au nanoparticles in reactive atmosphere offers an additional tool for a rational choice of a support for high-temperature gas-phase reactions involving gold nanocatalysts.</p>","PeriodicalId":581,"journal":{"name":"Gold Bulletin","volume":"52 2","pages":"105 - 114"},"PeriodicalIF":2.1000,"publicationDate":"2019-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s13404-019-00259-9","citationCount":"36","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Gold Bulletin","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s13404-019-00259-9","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 36
Abstract
In this study, we report on the influence of support and gas atmosphere on the thermal stability of Au nanoparticles on oxidic supports. All samples were prepared with a modified impregnation method and have initial Au particle sizes in the range of 3–4?nm. We observed that in air, Au nanoparticles on SiO2 and Al2O3 are thermally much more stable than Au nanoparticles on TiO2. For instance, upon treatment up to 700?°C, on SiO2, Au particles grew from 4 to 6?nm while on TiO2 from 3 to 13?nm. For Au nanoparticles on TiO2, growth is accelerated by oxidizing atmospheres and the presence of water and/or chloride. On non-reducible supports and in non-oxidizing atmosphere, the supported Au nanoparticles were remarkably stable. The insight into the growth of oxide-supported Au nanoparticles in reactive atmosphere offers an additional tool for a rational choice of a support for high-temperature gas-phase reactions involving gold nanocatalysts.
期刊介绍：
Gold Bulletin is the premier international peer reviewed journal on the latest science, technology and applications of gold. It includes papers on the latest research advances, state-of-the-art reviews, conference reports, book reviews and highlights of patents and scientific literature. Gold Bulletin does not publish manuscripts covering the snthesis of Gold nanoparticles in the presence of plant extracts or other nature-derived extracts. Gold Bulletin has been published over 40 years as a multidisciplinary journal read by chemists, physicists, engineers, metallurgists, materials scientists, biotechnologists, surface scientists, and nanotechnologists amongst others, both within industry and academia. Gold Bulletin is published in Association with the World Gold Council.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
