A step towards multipoint hydrogen sensing
Development of metal hydride-coated FBG hydrogen sensors
Kasun P. Dissanayake (TU Delft - Group Groves)
H. Sandra Dewi (TU Delft - Group Groves)
Ziqing Yuan (TU Delft - RST/Storage of Electrochemical Energy)
Herman Schreuders (TU Delft - ChemE/O&O groep)
Lars J. Bannenberg (TU Delft - RID/TS/Instrumenten groep)
Roger M. Groves (TU Delft - Group Groves)
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Abstract
Hydrogen, a key component of a net-carbon free society, requires precise sensing solutions. This research focuses on the development of metal hydride-coated Fibre Bragg Grating (FBG) based hydrogen sensors, marking a significant step towards the realisation of multipoint hydrogen sensing systems - a growing demand in the industry. The performance of three FBG sensors coated with nanometre-thick tantalum, palladium, and palladium-gold hydrogen sensing metal thin films, deposited via magnetron sputtering, is presented. Among these, the novel tantalum sensor exhibited the best performance, achieving a minimum detection limit of 50 ppm and and an enhanced sensitivity below 0.1% H2 levels at room temperature.