1. Pd-Decorated Multi-Walled Carbon Nanotube Sensor for Hydrogen Detection
- Author
-
Daewoong Jung, Maeum Han, Suwoong Lee, Yeongsam Kim, Seong Ho Kong, Jae Keon Kim, and An Hee Kyung
- Subjects
Materials science ,Explosive material ,Hydrogen ,Nanotubes, Carbon ,Biomedical Engineering ,chemistry.chemical_element ,Bioengineering ,General Chemistry ,Carbon nanotube ,Condensed Matter Physics ,Catalysis ,law.invention ,chemistry ,Chemical engineering ,law ,General Materials Science ,Reactivity (chemistry) ,Gold ,Platinum ,Layer (electronics) ,Palladium - Abstract
As hydrogen (H2) gas is highly reactive and explosive in ambient atmosphere, its prompt detection in industrial areas is imperative to prevent serious accidents. In particular, high-performance H2 sensors that can promptly detect even low-concentrations of H2 gas are necessary for safety. Carbon nanotubes (CNTs) have a large surface area and a high surface-to-volume ratio, and therefore, they are suitable for use as sensing materials in gas sensors. Moreover, gold, platinum, and palladium are known to be excellent catalyst metals that increase reactivity with H2 gas through the catalytic effect referred to as spill-over mechanism. In this study, a CNT felt sensor with a palladium (Pd) layer was fabricated, and its reactivity with H2 was evaluated. The sensitivity of a CNT felt sensor to H2 gas at room temperature was found to improve when coated with Pd layer.
- Published
- 2021