Abstract
Hydrogen sensor based on palladium (Pd) nano-rings supported by titania nanotubes (TNTs) has been investigated at different electrolyte temperatures. The electrolyte temperature, which affected the morphology of the TNTs and the sensitivity of the hydrogen sensor, varied from 0 to 80 °C. When the TNTs were prepared at 30 °C, they had a relatively regular nanotube structure, and the follow-up prepared sensor presented a high room-temperature hydrogen sensitivity of 97.49% at 1.9% hydrogen concentration.
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