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<p>Environmental Transmission Electron Microscopy gas holders are vital for studying catalyst nanostructures in reactive gases. Although there are existing methods to understand the behavior of catalysts during reaction, a “pressure gap” exists. Pressures of up to 4.5&#xa0;bar have been demonstrated, but many industrial catalysts operate at 10–100&#xa0;bar. This work introduces an ultra-high-pressure TEM gas holder designed to bridge this gap. Experiments demonstrate it can safely operate and achieve nanometer-scale resolution (~ 1.5&#xa0;nm) in an Environmental TEM at pressures up to 27.5&#xa0;bar. Practical resolution limitations are attributed to contamination and vibration rather than increased gas scatter.</p> Graphical abstract <p></p>

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Nanometer-scale resolution in an ultra-high pressure environmental TEM holder

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月18日

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  • George G. Hollyer,
  • Dmitri N. Zakharov,
  • Daan Hein Alsem,
  • Calvin Parkin,
  • Eric A. Stach

摘要

Environmental Transmission Electron Microscopy gas holders are vital for studying catalyst nanostructures in reactive gases. Although there are existing methods to understand the behavior of catalysts during reaction, a “pressure gap” exists. Pressures of up to 4.5 bar have been demonstrated, but many industrial catalysts operate at 10–100 bar. This work introduces an ultra-high-pressure TEM gas holder designed to bridge this gap. Experiments demonstrate it can safely operate and achieve nanometer-scale resolution (~ 1.5 nm) in an Environmental TEM at pressures up to 27.5 bar. Practical resolution limitations are attributed to contamination and vibration rather than increased gas scatter.

Graphical abstract