Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.ijhydene.2022.12.302
Titel (primär) Cost-effective selective hydrogen sensor based on the combination of catalytic spillover effect and impedance measurement
Autor Roland, U.; Hebestreit, A.; Taoussanis, A.; Eiserbeck, E.; Holzer, F.; Wotzka, A.; Wohlrab, S.
Quelle International Journal of Hydrogen Energy
Erscheinungsjahr 2023
Department TUCHEM
Band/Volume 48
Heft 96
Seite von 37550
Seite bis 37562
Sprache englisch
Topic T7 Bioeconomy
Keywords Hydrogen sensor; Selectivity; Spillover effect; Impedance spectroscopy; Surface electron donor
Abstract Selective measurement of hydrogen in the natural gas grid as large transport and storage infrastructure is a crucial requirement for establishing a hydrogen economy. Cost-effective sensors must face mainly two critical conditions: (i) absence of oxygen contents capable for ensuring the sensor function and (ii) presence of a large surplus of another reducing gas, methane. The developed Pt/TiO2 sensor is based on the combination of the catalytic spillover effect and an impedance measurement. It allows hydrogen detection in a wide concentration range and it is specific for hydrogen while other gases such as methane or carbon dioxide behave like inert gases. The sensor curve with decreasing relative sensitivity for higher hydrogen concentrations and the temperature dependence of the sensor effect are in agreement with the spillover-based sensor principle, where hydrogen is activated on Pt and then spills over onto the TiO2 where it acts as electron donor.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=25557
Roland, U., Hebestreit, A., Taoussanis, A., Eiserbeck, E., Holzer, F., Wotzka, A., Wohlrab, S. (2023):
Cost-effective selective hydrogen sensor based on the combination of catalytic spillover effect and impedance measurement
Int. J. Hydrog. Energy 48 (96), 37550 - 37562 10.1016/j.ijhydene.2022.12.302