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

The working temperature of pellistors using 3-dimensional mesoporous Co
₃
O
₄
(meso-Co
₃
O
₄
) supported Au-Pd, Au-Pd@meso-Co
₃
O
₄
, is significantly reduced to 300 °C, thereby avoiding possible catalytic poisoning at high temperatures inherent in conventional pellistors. Our results indicate that meso-Co
₃
O
₄
has a great advantage over the commercially available Co
₃
O
₄
with respect to sensing performance. The coverage of Au-Pd on Co
₃
O
₄
influences the sensor behavior. Besides, the number of deposited layers has an impact on the pellistor performance. 15-layer-deposition of Au-Pd@meso-Co
₃
O
₄
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.