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

Result code in 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>

Alternative codes found

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

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Sensors and Actuators B - Chemical

ISSN

0925-4005

e-ISSN

0925-4005

Volume of the periodical

444

Issue of the periodical within the volume

DEC 1 2025

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

138484

UT code for WoS article

001583905300006

EID of the result in the Scopus database

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