Highly sensitive coulometric titration of oxygen for the characterization of solid materials at elevated temperatures

Herms, Alexander; Yao, Jingying; Zosel, Jens; Vashook, Vladimir; Oelßner, Wolfram; Mertig, Michael

A new setup for characterization of solid material oxygen exchange and conductivity in a broad oxygen partial pressure range and at elevated temperatures is presented. The development target of this setup is directed towards the detection of ultra-low amounts of exchanged oxygen. For this, electrochemical cells made of yttria-stabilized zirconia (YSZ) were optimized and applied in a flow-through arrangement. The design and process measures enable a lower limit of detection below 100 pmol of exchanged oxygen. Furthermore, the system characteristics concerning oxygen dispersion, titration efficiency and electrode kinetics are described.

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Herms, Alexander / Yao, Jingying / Zosel, Jens / et al: Highly sensitive coulometric titration of oxygen for the characterization of solid materials at elevated temperatures. 2018. Copernicus Publications.

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Rechteinhaber: Alexander Herms et al.

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