H$_2$ Gas Sensing Properties of Pt/MoO$_3$ Gas Sensor

Pt/MoO$_3$가스센서의 수소 감지 특성

1wt% Pt/MoO$_3$ gas sensors for detecting H$_2$ gas were fabricated by the pressed pellet method and surface structures of Pt/MoO$_2$ were investigated by TEM and XRD. It was observed that as the calcination temperature is increased, the overlayers of MoO$_3$ on Pt are produced, but the Cl content in PtCl$\_$x/ are decreased. H$_2$ gas sensing properties in N$_2$ ambient and in air ambient were investigated, respectively, and Pt/MoO$_3$ had high sensitivity at low working temp ; 7.8% at 50$^{\circ}C$, 97.7% at 100$^{\circ}C$, 97.1% at 150$^{\circ}C$ when the specimens are treated at 400$^{\circ}C$, and 99.6% at 150$^{\circ}C$ when they are treated at 200$^{\circ}C$. It shows the development of a low-power type sensor is possible by using Pt/MoO$_3$.