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 Detalle_Publicacion

Gallium plasmonic nanoantennas unveiling multiple kinetics of hydrogen sensing, storage, and spillover

Abstract: Hydrogen is the key element to accomplish a carbon-free based economy. Here, the first evidence of plasmonic gallium (Ga) nanoantennas is provided as nanoreactors supported on sapphire (?-Al2O3) acting as direct plasmonenhanced photocatalyst for hydrogen sensing, storage, and spillover. The role of plasmon-catalyzed electron transfer between hydrogen and plasmonic Ga nanoparticle in the activation of those processes is highlighted, as opposed to conventional refractive index-change-based sensing. This study reveals that, while temperature selectively operates those various processes, longitudinal (LO-LSPR) and transverse (TO-LSPR) localized surface plasmon resonances of supported Ga nanoparticles open selectivity of localized reaction pathways at specific sites corresponding to the electromagnetic hot-spots. Specifically, the TO-LSPR couples light into the surface dissociative adsorption of hydrogen and formation of hydrides, whereas the LO-LSPR activates heterogeneous reactions at the interface with the support, that is, hydrogen spillover into ?-Al2O3 and reverse-oxygen spillover from ?-Al2O3. This Ga-based plasmon-catalytic platform expands the application of supported plasmoncatalysis to hydrogen technologies, including reversible fast hydrogen sensing in a timescale of a few seconds with a limit of detection as low as 5 ppm and in a broad temperature range from room-temperature up to 600 °C while remaining stable and reusable over an extended period of time.

 Fuente: Advanced Materials, 2021, 23 (29), 2100500

Editorial: Wiley-Blackwell

 Año de publicación: 2021

Nº de páginas: 12

Tipo de publicación: Artículo de Revista

 DOI: 10.1002/adma.202100500

ISSN: 1521-4095,0935-9648

 Proyecto español: PGC2018-096649-B-100

 Proyecto europeo: info:eu-repo/grantAgreement/EC/H2020/ 899598/eu/Active Optical Phase-Change Plasmonic Transdimensional Systems Enabling Femtojoule and Femtosecond Extreme Broadband Adaptive Reconfigurable Devices/PHEMTRONICS/

Url de la publicación: https://doi.org/10.1002/adma.202100500

Autoría

LOSURDO, MARIA

GUTIÉRREZ, YAEL

SUVOROVA, ALEXANDRA

GIANGREGORIO, MARIA M.

RUBANOV, SERGEY

BROWN, APRIL S.