Investigation of different catalytically active and passive materials for realising a hydrogen peroxide gas sensor

Abstract

In this work, different materials have been investigated for the realisation of a calorimetric sensor for the detection of hydrogen peroxide. Therefore, a test equipment for the realisation of different H2O2 concentrations as well as H2O concentrations at different temperatures has been built. As catalytically active materials copper, and diverse manganese oxides have been characterised. As passive materials nickel as well as PFA (Perfluoralkoxylalkan) have been applied for constructing a reference sensor. The materials with the best performance have been chosen for the realisation of an H2O2 sensor in a TO (transistor outline) housing. The sensor has been characterised towards the H2O2 sensitivity and the disturbing factors H2O concentration and temperature. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Strategies in developing thin-film sensors for monitoring aseptic food processes: Theoretical considerations and investigations of passivation materials

“…Fig. 3 shows exemplarily a sensor measurement plot of a calorimetric H 2 O 2 gas sensor at different H 2 O 2 concentrations (sensor fabrication of this set-up is found in, e.g., [25]). In the upper part of the measurement plot the temperatures of both temperature sensors (catalytically activated and passivated) are presented.…”

“…Characteristic measurement plot of a calorimetric H 2 O 2 gas sensor exposed to various H 2 O 2 concentrations from 0-6.8% v/v. The calorimetric gas sensor consists of two platinum temperature sensors, passivation material: PFA, catalyst: MnO 2 , set-up as described in [25]. The upper part depicts the temperatures of both temperature sensors (catalytically activated and passivated).…”

Multi‐sensor chip for the investigation of different types of metal oxides for the detection of H2O2 in the ppm range

“…The multi-sensor chip fabricated in this work contains four identical sensing structures on a sapphire substrate with a size of 8 Â 8 mm 2 . Sapphire was used as substrate due to its thermal properties.…”

“…With regard to the aseptic filling processes, there is a high demand for monitoring the H 2 O 2 concentration in the exhaust air of such sterilization plants, which typically is in the ppm concentration range, not only with respect to the TLV but also in terms of process monitoring. [2][3][4][5][6]. This is equally true for commercially available metal-oxide-semiconductor gas sensors [7].…”

Thin-film calorimetric H2O2 gas sensor for the validation of germicidal effectivity in aseptic filling processes

“…In previous works, the authors have investigated different sensor layouts and materials as chemical transducer, which can be employed for the fabrication of a calorimetric H 2 O 2 gas sensor 5,6 .…”