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説明:

Two dimensional (2D) crystals have attracted strong interest as a new class of proton conducting materials that can block atoms, molecules and ions while allowing proton transport through the atomically thin basal planes. Although 2D materials exhibit this perfect selectivity, the reported proton conductivities have been relatively low. Here we show that vacancy-rich titania monolayers are highly permeable to protons while remaining impermeable to helium with proton conductivity exceeding 100 S cm-2 at 200 oC and surpassing targets set by industry roadmaps. The fast and selective proton transport is attributed to an extremely high density of titanium-atom vacancies (one per square nm), which effectively turns titania monolayers into angstrom-scale sieves. Our findings highlight the potential of 2D oxides as membrane materials for hydrogen-based technologies.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Nanosheets, Proton transport, Ion conductivity

刊行年月日: 2024-12-04

出版者: Springer Nature

掲載誌:

• Nature Communications (ISSN: 20411723) vol. 15 p. 1-8 10546

研究助成金:

• Science and Technology Development Fund (FDCT), Macao SAR 0063/2023/RIA1
• Natural Science Foundation of China 52322319
• UM research grant SRG2022-00053- IAPME
• UM and UMDF research grant MYRG-GRG2023-00014-IAPMEUMDF
• European Research Council VANDER
• Lloyd’s Register Foundation Designer Nanomaterials
• Royal Society URF\R1\201515
• andDirected Research Projects Program of the Research and Innovation Center for Graphene and 2D Materials at Khalifa University RIC2D-D001

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s41467-024-54544-z

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更新時刻: 2024-12-06 17:17:41 +0900

MDRでの公開時刻: 2024-12-06 17:17:41 +0900