Substantially Accelerated Response and Recovery in Pd-Decorated WO 3 Nanorods Gasochromic Hydrogen Sensor.

Autor: Cho SH; Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea., Suh JM; Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA., Jeong B; Advanced Nano Surface Research Group, Korea Basic Science Institute, Dajeon, 34133, Republic of Korea., Lee TH; Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea., Choi KS; Advanced Nano Surface Research Group, Korea Basic Science Institute, Dajeon, 34133, Republic of Korea., Eom TH; Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea., Choi SW; Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea., Nam GB; Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea., Kim YJ; Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea., Jang HW; Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea.; Advanced Institute of Convergence Technology, Seoul National University, Suwon, 16229, Republic of Korea.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Aug; Vol. 20 (32), pp. e2309744. Date of Electronic Publication: 2024 Mar 20.
DOI: 10.1002/smll.202309744
Abstrakt: The development of hydrogen (H 2 ) gas sensors is essential for the safe and efficient adoption of H 2 gas as a clean, renewable energy source in the challenges against climate change, given its flammability and associated safety risks. Among various H 2 sensors, gasochromic sensors have attracted great interest due to their highly intuitive and low power operation, but slow kinetics, especially slow recovery rate limited its further practical application. This study introduces Pd-decorated amorphous WO 3 nanorods (Pd-WO 3 NRs) as an innovative gasochromic H 2 sensor, demonstrating rapid and highly reversible color changes for H 2 detection. In specific, the amorphous nanostructure exhibits notable porosity, enabling rapid detection and recovery by facilitating effective H 2 gas interaction and efficient diffusion of hydrogen ions (H + ) dissociated from the Pd nanoparticles (Pd NPs). The optimized Pd-WO 3 NRs sensor achieves an impressive response time of 14 s and a recovery time of 1 s to 5% H 2 . The impressively fast recovery time of 1 s is observed under a wide range of H 2 concentrations (0.2-5%), making this study a fundamental solution to the challenged slow recovery of gasochromic H 2 sensors.
(© 2024 The Authors. Small published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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