Fig. 3: The fundamental mechanism of Pd-based H2 sensor. | Microsystems & Nanoengineering

Fig. 3: The fundamental mechanism of Pd-based H2 sensor.

From: A comprehensive review of hydrogen sensor for thermal runaway monitoring: fundamentals, recent advancements, and challenges

Fig. 3: The fundamental mechanism of Pd-based H2 sensor.

Schematic illustrations for (100) surface of fcc Pd (a) and the phases formed during H2 adsorption (b); c PCT curves of bulk Pd-H on desorption process; d Energy landscape encountered by a H2 molecule upon interaction with a Pd surface. In the first step, the H2 molecule dissociates on the Pd surface into hydrogen atoms (H). In the next step, the H atoms diffuse into the subsurface region and occupy subsurface interstitial lattice sites. Subsequently, H diffuses interstitially further into the bulk

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