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Using Precise Gas Exposures to Resolve Surface Site Filling in Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS)

17 June 2025, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

In this communication we report how to assemble a DRIFTS system that can precisely control the pressure in the cell from < 10-6 Torr to atmospheric pressure using easily accessible components. As a proof-of-principle we adsorb and react CO over a Pd/Al2O3 catalyst where we can observe pressure, temperature, and reaction-dependent preferential binding to adsorption sites.

Keywords

DRIFTS
Heterogeneous Catalysis
Pd Catalysis

Supplementary materials

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Version History

Jun 17, 2025 Version 1

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The content is available under CC BY NC 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv-2025-7x1r6
D O I: 10.26434/chemrxiv-2025-7x1r6 [opens in a new tab]

Author’s competing interest statement

The author(s) have declared they have no conflict of interest with regard to this content

Ethics

The author(s) have declared ethics committee/IRB approval is not relevant to this content

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