Effect of Silver Promoter on the H2 Gasochromic Recovery Behavior of Pt-Decorated WO3 Nanowires
Abstract
The hydrogen gasochromic phenomenon offers a new strategy for real-time sensing technologies for hydrogen leakage to ensure hydrogen safety. However, the limited recovery kinetics impede the cycling and further practical applications. Herein, we designed a series of PtAg-decorated WO3 nanowires via the chemical reduction deposition method, which could exhibit obvious and reversible color changes for H2 detection. With the assistance of Ag, the oxygen adsorption and dissociation were accelerated; then, the sample could exhibit a constant rapid recovery rate. The crystalline Pt-Ag/WO3 nanowires could attain a 50% recovery degree within 52 s, and the recovery time of the Pt-Ag/WO3 sample was reduced to one fifth that of Pt/WO3. This study provides a fundamental solution to the challenge of slow recovery kinetics in H2 gasochromic crystalline materials.
Fields of Study & Subjects
Gas Sensing Nanomaterials and Sensors
Transition Metal Oxide Nanomaterials
Catalytic Processes in Materials Science
Publication details
- Journal / source
- International Journal of Molecular Sciences
- Publisher
- MDPI AG
- Volume
- 27
- Issue
- 2
- Pages
- 833–833
- Publication date
- 14 January 2026
- Language
- EN