Supraparticles for Bare‐Eye H <sub>2</sub> Indication and Monitoring: Design, Working Principle, and Molecular Mobility

نویسندگان

چکیده

Indicators for H2 are crucial to ensure safety standards in a green hydrogen economy. Herein, the authors report micron-scaled indicator supraparticles real-time monitoring and irreversible recording of gas via rapid eye-readable two-step color change. They produced spray-drying SiO2 nanoparticles, AuPd indicator-dye resazurin. The resulting gas-accessible mesoporous supraparticle framework absorbs water from humid atmospheres create three-phase-system. In presence H2, switches first irreversibly purple pink further reversibly colorless state. situ infrared spectroscopy measurements indicate that this change originates (ir)reversible H2-induced reduction resazurin resorufin hydroresorufin. Further spectroscopic molecular dynamics simulations elucidate key achieve functionality is an established three-phase-system within supraparticles, granting mobility Water acts as transport medium carry molecules towards catalytically active nanoparticles. advantages their small dimensions, affordable scalable production, fast response times, straightforward bare-eye detection, possibility simultaneously exposure ex post. Therefore, attractive additive leakage detection localization

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ژورنال

عنوان ژورنال: Advanced Functional Materials

سال: 2022

ISSN: ['1616-301X', '1616-3028']

DOI: https://doi.org/10.1002/adfm.202112379