Pd-Decorated Multi-Walled Carbon Nanotube Sensor for Hydrogen Detection

Area of Science:

• Materials Science
• Chemical Engineering
• Sensor Technology

Background:

• Hydrogen (H₂) gas poses significant explosion risks in industrial settings, necessitating reliable detection methods.
• High-performance sensors are required for early detection of low H₂ concentrations to ensure safety.
• Carbon nanotubes (CNTs) offer excellent sensing properties due to their high surface area and surface-to-volume ratio.

Purpose of the Study:

• To fabricate a carbon nanotube (CNT) felt sensor.
• To investigate the effect of a palladium (Pd) coating on the sensor's reactivity and sensitivity to hydrogen gas.
• To evaluate the sensor's performance at room temperature.

Main Methods:

• Fabrication of a CNT felt sensor.
• Coating the CNT felt with a palladium (Pd) layer.
• Evaluation of the sensor's response to hydrogen gas at room temperature.

Main Results:

• The fabricated CNT felt sensor demonstrated reactivity with hydrogen gas.
• Coating the CNT felt with palladium (Pd) significantly improved the sensor's sensitivity to hydrogen gas.
• Enhanced H₂ gas sensitivity was observed at room temperature.

Conclusions:

• Palladium (Pd) coating enhances the performance of CNT felt sensors for hydrogen gas detection.
• The developed Pd-coated CNT sensor shows promise for improving industrial safety through effective H₂ monitoring.
• This approach offers a viable pathway for developing high-performance, room-temperature hydrogen sensors.