August 19, 2025Advanced Sensor ResearchOpen Access

Highly Sensitive Room‐Temperature Hydrogen Detection with Palladium Nanoparticle‐Based Capacitive‐Type Sensors

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Capacitive sensors demonstrate high selectivity for hydrogen in the presence of other gases, suggesting novel monitoring applications.

Peak sensitivity of 61.94 occurs at 20,000 ppm hydrogen using palladium nanoparticles for detection, highlighting the sensor's effectiveness.
Negligible interference from methane, carbon dioxide, and carbon monoxide is observed, showing the sensor's selectivity for hydrogen detection.
Comprehensive characterization using microelectromechanical systems reveals strong sensitivity correlation with nanoparticle content in capacitive-type sensors.
Density functional theory calculations indicate volumetric expansion of palladium, peaking at 13.7% at an H/Pd ratio of 1, informing design improvements.

Qiu et al. (2025) studied this question.

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