Visualizing the substrate-dependent structural evolution of Na2WO4 via in-situ transmission electron microscopy

IF 13.2 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Today Pub Date : 2025-04-05 DOI:10.1016/j.nantod.2025.102751

Kunkun Wei , Yutao Ren , Yilin Zhao , Fangwei Liu , Xutao Chen , Yue Wang , Shihui Zou , Chengyuan Liu , Yang Pan , Jianguo Huang , Wentao Yuan , Zhongkang Han , Yong Wang , Jie Fan

{"title":"Visualizing the substrate-dependent structural evolution of Na2WO4 via in-situ transmission electron microscopy","authors":"Kunkun Wei , Yutao Ren , Yilin Zhao , Fangwei Liu , Xutao Chen , Yue Wang , Shihui Zou , Chengyuan Liu , Yang Pan , Jianguo Huang , Wentao Yuan , Zhongkang Han , Yong Wang , Jie Fan","doi":"10.1016/j.nantod.2025.102751","DOIUrl":null,"url":null,"abstract":"<div><div>Supported nanocatalysts often undergo sintering at elevated temperatures, whereas the dispersion of large particles into small particles is uncommon. Here, we discover that Na2WO4 evolves from large bulk particles to evenly distributed high-concentration nanoclusters on the ZrO2 surface but remains as large particles on the TiO2 surface at high temperatures. This substrate-dependent structural evolution is visualized by in-situ transmission electron microscopy and rationalized by the differing interactions between Na2WO4 and the substrates. The great potential of this substrate-dependent structural evolution in developing advanced Na2WO4 cluster catalysts is demonstrated using methyl chloride-to-vinyl chloride as a probe reaction. Benefiting from the presence of high-concentration Na2WO4 nanoclusters that effectively couple ·CH2Cl radicals, Na2WO4/ZrO2 exhibits a C2H3Cl selectivity of 31.9 % and a yield of 20.0 % at 700 °C, which is much higher than those of Na2WO4/TiO2.</div></div>","PeriodicalId":395,"journal":{"name":"Nano Today","volume":"63 ","pages":"Article 102751"},"PeriodicalIF":13.2000,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Today","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1748013225001239","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Supported nanocatalysts often undergo sintering at elevated temperatures, whereas the dispersion of large particles into small particles is uncommon. Here, we discover that Na₂WO₄ evolves from large bulk particles to evenly distributed high-concentration nanoclusters on the ZrO₂ surface but remains as large particles on the TiO₂ surface at high temperatures. This substrate-dependent structural evolution is visualized by in-situ transmission electron microscopy and rationalized by the differing interactions between Na₂WO₄ and the substrates. The great potential of this substrate-dependent structural evolution in developing advanced Na₂WO₄ cluster catalysts is demonstrated using methyl chloride-to-vinyl chloride as a probe reaction. Benefiting from the presence of high-concentration Na₂WO₄ nanoclusters that effectively couple ·CH₂Cl radicals, Na₂WO₄/ZrO₂ exhibits a C₂H₃Cl selectivity of 31.9 % and a yield of 20.0 % at 700 °C, which is much higher than those of Na₂WO₄/TiO₂.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Nano Today 工程技术-材料科学：综合

CiteScore

21.50

自引率

3.40%

发文量

305

审稿时长

40 days

期刊介绍： Nano Today is a journal dedicated to publishing influential and innovative work in the field of nanoscience and technology. It covers a wide range of subject areas including biomaterials, materials chemistry, materials science, chemistry, bioengineering, biochemistry, genetics and molecular biology, engineering, and nanotechnology. The journal considers articles that inform readers about the latest research, breakthroughs, and topical issues in these fields. It provides comprehensive coverage through a mixture of peer-reviewed articles, research news, and information on key developments. Nano Today is abstracted and indexed in Science Citation Index, Ei Compendex, Embase, Scopus, and INSPEC.