Operating an ozone-evolving PEM electrolyser in tap water: A case study of water and ion transport

Grimmig, Roman; Gillemot, Philipp; Stucki, Samuel; Günther, Klaus; Baltruschat, Helmut; Witzleben, Steffen

doi:10.1016/j.seppur.2022.121063

Cited by 4 publications

(1 citation statement)

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“…A structured membrane-electrode assembly (SMEA), consisting of a Nafion 117 membrane and seven pairs of PbO 2 -coated porous titanium anodes and porous titanium cathodes (all Innovatec Gerätetechnik GmbH, Rheinbach, Germany), was mounted within a PVC housing (as previously described in ref. [73]). The ozone-rich gas phase of the anodic half-cell was exhausted into a separate flask to prevent the introduction and subsequent measurement of other electrochemically formed oxygen species.…”

Section: Characterization Of Ozone Sensing Propertiesmentioning

confidence: 99%

Evaluating Platinum‐Based Ionic Polymer Metal Composites as Potentiometric Sensors for Dissolved Ozone in Ultrapure Water Systems

Grimmig

Gillemot

Lindner

et al. 2023

Adv Materials Technologies

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Monitoring the content of dissolved ozone in purified water is often mandatory to ensure the appropriate levels of disinfection and sanitization. However, quantification bears challenges as colorimetric assays require laborious off-line analysis, while commercially available instruments for electrochemical process analysis are expensive and often lack the possibility for miniaturization and discretionary installation. In this study, potentiometric ionic polymer metal composite (IPMC) sensors for the determination of dissolved ozone in ultrapure water (UPW) systems are presented. Commercially available polymer electrolyte membranes are treated via an impregnation-reduction method to obtain nanostructured platinum layers. By applying 25 different synthesis conditions, layer thicknesses of 2.2 to 12.6 μm are obtained. Supporting radiographic analyses indicate that the platinum concentration of the impregnation solution has the highest influence on the obtained metal loading. The sensor response behavior is explained by a Langmuir pseudo-isotherm model and allows the quantification of dissolved ozone to trace levels of less than 10 μg L −1 . Additional statistical evaluations show that the expected Pt loading and radiographic blackening levels can be predicted with high accuracy and significance (R 2 adj. > 0.90, p < 10 −10 ) solely from given synthesis conditions.

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Section: Characterization Of Ozone Sensing Propertiesmentioning

confidence: 99%