Long-term reliable wireless H<sub>2</sub> gas sensor via repeatable thermal refreshing of palladium nanowire.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39384791.
- Also identified by DOI 10.1038/s41467-024-53080-0 and PMC identifier 11479629.
- Licence recorded as CC BY-NC-ND.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The increasing significance of hydrogen (H<sub>2</sub>) gas as a clean energy source has prompted the development of high-performance H<sub>2</sub> gas sensors. Palladium (Pd)-based sensors, with their advantages of selectivity, scalability, and cost-effectiveness, have shown promise in this regard. However, the long-term stability and reliability of Pd-based sensors remain a challenge. This study not only identifies the exact cause for performance degradation in palladium (Pd) nanowire H<sub>2</sub> sensors, but also implements and optimizes a cost-effective recovery method. The results from density functional theory (DFT) calculations and material analysis confirm the presence of C = O bonds, indicating performance degradation due to carbon dioxide (CO<sub>2</sub>) accumulation on the Pd surface. Based on the molecular behavior calculation in high temperatures, we optimized the thermal treatment method of 200 °C for 10 minutes to remove the C = O contaminants, resulting in nearly 100% recovery of the sensor's initial performance even after 2 months of contamination.