“…Previously, a smart hydrogen sensor based on the Ptoxide-In 0.5 Al 0.5 P MOS structure was first developed and reported by our group [24]. In this work, the detailed hydrogensensing properties of the interesting catalytic Pt/In 0.5 Al 0.5 P MOS and MS [25] Schottky diode hydrogen sensors are comprehensively studied and compared.…”