Au-Pd@Meso-Co3O4: A Promising Material for New Generation Pellistor with Low Working Temperature

The working temperature of pellistors using 3-dimensional mesoporous Co3O4 (meso-Co3O4 ) supported Au-Pd, Au-Pd@meso-Co3O4 , is significantly reduced to 300 °C, thereby avoiding possible catalytic poisoning at high temperatures inherent in conventional pellistors. Our results indicate that meso-Co3O4 has a great advantage over the commercially available Co3O4 with respect to sensing performance. The coverage of Au-Pd on Co3O4 influences the sensor behavior. Besides, the number of deposited layers has an impact on the pellistor performance. 15-layer-deposition of Au-Pd@meso-Co3O4 delivers the best result. This development towards a decreased working temperature can be anticipated as the new concept to design robust pellistors with low power consumption.