Mechanistic insights into ethanol sensing by Pt-decorated WO3 nanowires

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F26%3A0200139" target="_blank" >RIV/00216305:26620/26:0200139 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0925400525020647?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0925400525020647?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.snb.2025.139287" target="_blank" >10.1016/j.snb.2025.139287</a>

Result language

angličtina

Original language name

Mechanistic insights into ethanol sensing by Pt-decorated WO3 nanowires

Original language description

This study investigates the fabrication and gas-sensing properties of Pt-decorated tungsten trioxide (WO3) nanowires (NWs) for chemiresistor applications. Single-standing WO3 and Pt/WO3 NWs were synthesized via aerosol-assisted chemical vapor deposition (AACVD) and assembled onto sensor chips using dielectrophoresis. Structural and morphological characterization was conducted using scanning electron microscopy (SEM), highresolution transmission electron microscopy (HR-TEM), and energy-dispersive X-ray spectroscopy (EDX). Sensor performance was evaluated through resistance measurements under varying ethanol concentrations and operating temperatures. Pt-decorated WO3 NWs demonstrated a significantly enhanced response compared to pristine WO3 NWs. It is also shown that Pt decoration resulted in an increased baseline resistance, consistent with electronic sensitization effects. Notably, Pt-functionalized sensors displayed a substantial response even at 100 degrees C, indicating promise for low-temperature operation. To elucidate the surface chemistry and electronic interactions during ethanol detection, near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) was employed. Based on this study, the superior sensing performance is attributed to the catalytic spill-over effect of Pt nanoparticles, charge transfer interactions, and the generation of surface oxygen vacancies. These findings offer valuable insights into the sensing mechanisms of noble metal-decorated metal oxide chemiresistors toward volatile organic compounds.

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

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

<a href="/en/project/GA22-14886S" target="_blank" >GA22-14886S: Advanced chemoresistive device based on gas sensitive single-1D nanostructures (1D-SENS)</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2026

Confidentiality

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

Name of the periodical

SENSORS AND ACTUATORS B-CHEMICAL

ISSN

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e-ISSN

0925-4005

Volume of the periodical

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Issue of the periodical within the volume

451

Country of publishing house

CH - SWITZERLAND

Number of pages

11

Pages from-to

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UT code for WoS article

001642266100001

EID of the result in the Scopus database

2-s2.0-105024539330