Optimizing the sensitivity of palladium based hydrogen sensors

• DOI: 10.1016/j.snb.2017.11.180
• Publication Date: 2017-12-09T22:22:25Z
• Authors: Maximilian Fisser; Rodney A. Badcock; Paul D. Teal; Arvid Hunze
• Keywords: Hydrogen sensor; Hysteresis

This paper reports on the sensitivity optimization of palladium based hydrogen sensors. The transduction mechanism is volumetric expansion palladium, leading to induced strain in a sensing element. Absorption lattice causes expansion, which can be measured using sensors attached palladium. transduced from expanding dependent not only partial pressure and temperature, but also geometry mechanical transfer sensor. In this we demonstrate design validation sensor for defined concentration ranges, selection working achieve desired sensitivity. We show that operating temperature range are critical order avoid phase change region, cause hysteresis, as well degradation itself adhesive interface. quantify between sensor, coefficient kst introduced. Two empirical methods demonstrated calculate kst: (a) via calibration sensitivity, (b) Three designs, with fiber Bragg gratings used correlate theoretical assumptions experimental data.