Room temperature hydrogen sensor for the detection of flammable concentrations based on SWCNT modified by a solid solution of oxygen in Pd nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00643582" target="_blank" >RIV/67985858:_____/25:00643582 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/25:00643582 RIV/49777513:23210/25:43976024 RIV/49777513:23220/25:43976024

Výsledek na webu

<a href="https://www.sciencedirect.com/journal/sensors-and-actuators-b-chemical/vol/444/part/P2" target="_blank" >https://www.sciencedirect.com/journal/sensors-and-actuators-b-chemical/vol/444/part/P2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.snb.2025.138484" target="_blank" >10.1016/j.snb.2025.138484</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Room temperature hydrogen sensor for the detection of flammable concentrations based on SWCNT modified by a solid solution of oxygen in Pd nanoparticles

Popis výsledku v původním jazyce

Fabricating a high-response sensor for the repeatable detection of a high (flammable) hydrogen concentration (4 %) at room temperature with long-term stability remains a challenge. Here, a hydrogen (H2) sensor based on single-walled carbon nanotubes (SWCNTs) functionalized with palladium (Pd) nanoparticles of a previously unexplored structure is demonstrated. The active sensing layer is fabricated via airbrush deposition of SWCNTs and pulsed laser ablation of Pd in a vacuum. Complementary characterization techniques, including HRTEM, electron diffraction, STEM-EELS, Raman spectroscopy, and XP-spectroscopy, reveal that the Pd nanoparticles form a solid solution of oxygen in metallic Pd (Pd+O), partially covered with a two-dimensional palladium oxide (PdO) layer. The Pd+O/PdO nanoparticles exhibit an expanded face-centered cubic (FCC) and cubic primitive lattice, representing a previously unreported Pd structure. The sensor achieves a repeatable 203 % response to 4 % H2 at room temperature and operates over a wide concentration range (0.05 % – 10 % H2 in air) with longterm stability exceeding 1.5 years. The detection mechanism is hypothesized to involve ionosorption and/or oxygen vacancies in the PdO layer. These findings highlight the undiscovered potential of carbon nanostructure/ Pd nanoparticle hybrids for enhanced hydrogen sensing through Pd structure tailoring.

Název v anglickém jazyce

Room temperature hydrogen sensor for the detection of flammable concentrations based on SWCNT modified by a solid solution of oxygen in Pd nanoparticles

Popis výsledku anglicky

Fabricating a high-response sensor for the repeatable detection of a high (flammable) hydrogen concentration (4 %) at room temperature with long-term stability remains a challenge. Here, a hydrogen (H2) sensor based on single-walled carbon nanotubes (SWCNTs) functionalized with palladium (Pd) nanoparticles of a previously unexplored structure is demonstrated. The active sensing layer is fabricated via airbrush deposition of SWCNTs and pulsed laser ablation of Pd in a vacuum. Complementary characterization techniques, including HRTEM, electron diffraction, STEM-EELS, Raman spectroscopy, and XP-spectroscopy, reveal that the Pd nanoparticles form a solid solution of oxygen in metallic Pd (Pd+O), partially covered with a two-dimensional palladium oxide (PdO) layer. The Pd+O/PdO nanoparticles exhibit an expanded face-centered cubic (FCC) and cubic primitive lattice, representing a previously unreported Pd structure. The sensor achieves a repeatable 203 % response to 4 % H2 at room temperature and operates over a wide concentration range (0.05 % – 10 % H2 in air) with longterm stability exceeding 1.5 years. The detection mechanism is hypothesized to involve ionosorption and/or oxygen vacancies in the PdO layer. These findings highlight the undiscovered potential of carbon nanostructure/ Pd nanoparticle hybrids for enhanced hydrogen sensing through Pd structure tailoring.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Sensors and Actuators B - Chemical

ISSN

0925-4005

e-ISSN

0925-4005

Svazek periodika

444

Číslo periodika v rámci svazku

DEC 1 2025

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

138484

Kód UT WoS článku

001583905300006

EID výsledku v databázi Scopus

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