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In situ FTIR study of oxygen adsorption on nanostructured RuO2 thin-film electrode

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Abstract

In situ Fourier transform spectroscopy (FTIR) was used to study interactions of nanostructured ruthenium oxide (RuO2) thin-film sensing electrode with O2 at room temperature. RuO2 nanostructures were pretreated at 1,000 °C for 1 h in order to obtain good crystallinity of amorphous RuO2 nanoparticles. Morphology and properties of nanostructured RuO2 were characterized by X-ray diffraction, thermo-gravimetric/differential thermal analysis, scanning electron microscopy, and FTIR. It was shown that pretreated RuO2 is quite active for O2 −, O2 2−, and O2− adsorption with clear 722 cm−1 band for superoxide ions (O2 −) adsorption for the different oxygen concentrations. The results of in situ FTIR measurements revealed that the active sites for oxygen adsorption are not limited to the triple boundaries, but extended to surfaces of RuO2 electrodes. Fundamental vibration frequencies of ruthenium–oxygen bond at a temperature of 23 °C as well as region above fundamental frequencies for the nanostructured RuO2 were identified.

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Acknowledgments

This work was partially supported by Research and Development Program of CSIRO Materials Science and Engineering Division and CSIRO ICT Centre, Australia—project “Integrated Water Quality Monitoring Sensors”.

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  1. Materials Science and Engineering Division, Commonwealth Scientific Industrial Research Organisation (CSIRO), 37 Graham Road, Highett, VIC, 3190, Australia

    Serge Zhuiykov

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  1. Serge Zhuiykov
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Correspondence to Serge Zhuiykov.

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Zhuiykov, S. In situ FTIR study of oxygen adsorption on nanostructured RuO2 thin-film electrode. Ionics 15, 507–512 (2009). https://doi.org/10.1007/s11581-008-0294-0

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  • DOI: https://doi.org/10.1007/s11581-008-0294-0

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