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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

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Published on: September 20, 2012

Quantitative temperature mapping within an operating catalyst by spatially resolved 27Al NMR.

Anna A Lysova¹, Alexander V Kulikov, Valentin N Parmon

¹International Tomography Center SB RAS, 3A Institutskaya St., Novosibirsk 630090, Russia.

Chemical Communications (Cambridge, England)

|May 4, 2012

Summary

Spatially resolved Nuclear Magnetic Resonance (NMR) quantitatively maps solid catalyst temperatures during reactions. This non-invasive technique using the aluminum-27 (27Al) NMR signal is applicable to both liquid and gas phase heterogeneous catalysis.

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Area of Science:

Catalysis
Materials Science
Spectroscopy

Background:

Understanding catalyst temperature is crucial for optimizing heterogeneous catalytic processes.
Current methods for in situ temperature measurement can be invasive or limited in scope.

Purpose of the Study:

To develop and demonstrate a non-invasive technique for quantitatively mapping solid catalyst temperatures under operating conditions.
To assess the applicability of spatially resolved NMR for in situ temperature mapping in heterogeneous catalysis.

Main Methods:

Utilized spatially resolved Nuclear Magnetic Resonance (NMR) spectroscopy.
Employed the 27Al NMR signal from the solid catalyst phase (Pt/γ-Al2O3).
Performed quantitative temperature mapping during hydrogen oxidation with oxygen.

Main Results:

Successfully mapped the temperature distribution of the solid catalyst in situ.
Demonstrated the quantitative nature of the NMR-based temperature mapping.
Validated the technique for a relevant catalytic reaction (H2 oxidation over Pt/γ-Al2O3).

Conclusions:

Spatially resolved NMR provides a powerful non-invasive tool for in situ catalyst temperature mapping.
The technique is suitable for both liquid- and gas-phase heterogeneous catalytic reactions.
This method offers new possibilities for catalyst characterization and process optimization.