Detail publikace

NAP-XPS study of surface chemistry of CO and ethanol sensing with WO3 nanowires-based gas sensor

PILIAI, L. DINHOVA, T.N. JANATA, M. BALAKIN, D. VALLEJOS, S. OTTA, J. STEFKOVA, J. FISER, L. FITL, P. NOVOTNY, M. HUBALEK, J. VOROCHTA, M. MATOLINOVA, I. VRNATA, M.

Originální název

NAP-XPS study of surface chemistry of CO and ethanol sensing with WO3 nanowires-based gas sensor

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The nanowires prepared on a commercial Al2O3-based sensor platform were studied by near ambient pressure Xray photoelectron spectroscopy (NAP-XPS) upon detecting CO and ethanol. Our findings indicated that the exsitu prepared WO3 NWs-based gas sensor might not be suitable for NAP-XPS studies, as the surfaces tend to accumulate significant carbon contamination, which remains on the surface even after long-term annealing in mbar range oxygen atmosphere at 593 K. To address this challenge, we developed a methodology involving exposure of the sensor to NOx, which effectively cleans the surface and enables the detection of subtle chemical changes upon exposure to various carbon-containing analytes. Using NAP-XPS analysis, we investigated the gas sensing mechanisms of WO3 NWs for CO and ethanol at different temperatures, revealing that it might combine several mechanisms commonly observed in metal-oxide chemiresistors. It is shown that the response to CO rather arises from the quick interaction of CO molecules with the ionosorbed oxygen. In the case of ethanol sensing, the main driving force for the sensor macroscopic electrical response at low temperatures is the adsorption of ethanol molecules. In contrast, at high temperatures, it combines the adsorption of ethoxy groups with the strong reducing effect of EtOH on the WO3 surface.

Klíčová slova

WO 3 nanowires; Gas sensing mechanism; Operando study; Near-ambient pressure XPS

Autoři

PILIAI, L.; DINHOVA, T.N.; JANATA, M.; BALAKIN, D.; VALLEJOS, S.; OTTA, J.; STEFKOVA, J.; FISER, L.; FITL, P.; NOVOTNY, M.; HUBALEK, J.; VOROCHTA, M.; MATOLINOVA, I.; VRNATA, M.

Vydáno

15. 12. 2023

Nakladatel

ELSEVIER SCIENCE SA

Místo

LAUSANNE

ISSN

0925-4005

Periodikum

Sensors and Actuators B: Chemical

Ročník

397

Číslo

Prosinec 2023

Stát

Švýcarská konfederace

Strany od

1

Strany do

12

Strany počet

12

URL

https://pdf.sciencedirectassets.com/271353/1-s2.0-S0925400523X00197/1-s2.0-S0925400523013977/main.pdf?X-Amz-Security-Token=IQoJb3JpZ2luX2VjEDgaCXVzLWVhc3QtMSJHMEUCIF0yjbsz%2B39qI3sCrMMpzbGeLRXbq0X%2BUbzWC10BZECFAiEA2i8DHcyMp74xgF3rL5bmJPKKDvMcxkTnzb%2B9zsAKWEIqvAUIoP%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARAFGgwwNTkwMDM1NDY4NjUiDP4AH3Z5AJDkOF4kpyqQBazWRu00eaFuL7EEeOu2pelYSV7Fafuv%2FYs%2Fj8l7WSvC%2BpqFUNjy2ZsWIskX%2Bu1N1Z2UNfD0sXipFvvmkK%2FjndNU36S2miEYM0yZ8euXBVnpJ7%2FN02ngBMiXWndXR2dYjjhOFhaxnOddCPdKmpt95530aUau7tT

BibTex

@article{BUT185688,
  author="PILIAI, L. and DINHOVA, T.N. and JANATA, M. and BALAKIN, D. and VALLEJOS, S. and OTTA, J. and STEFKOVA, J. and FISER, L. and FITL, P. and NOVOTNY, M. and HUBALEK, J. and VOROCHTA, M. and MATOLINOVA, I. and VRNATA, M.",
  title="NAP-XPS study of surface chemistry of CO and ethanol sensing with WO3 nanowires-based gas sensor",
  journal="Sensors and Actuators B: Chemical",
  year="2023",
  volume="397",
  number="Prosinec 2023",
  pages="1--12",
  doi="10.1016/j.snb.2023.134682",
  issn="0925-4005",
  url="https://pdf.sciencedirectassets.com/271353/1-s2.0-S0925400523X00197/1-s2.0-S0925400523013977/main.pdf?X-Amz-Security-Token=IQoJb3JpZ2luX2VjEDgaCXVzLWVhc3QtMSJHMEUCIF0yjbsz%2B39qI3sCrMMpzbGeLRXbq0X%2BUbzWC10BZECFAiEA2i8DHcyMp74xgF3rL5bmJPKKDvMcxkTnzb%2B9zsAKWEIqvAUIoP%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARAFGgwwNTkwMDM1NDY4NjUiDP4AH3Z5AJDkOF4kpyqQBazWRu00eaFuL7EEeOu2pelYSV7Fafuv%2FYs%2Fj8l7WSvC%2BpqFUNjy2ZsWIskX%2Bu1N1Z2UNfD0sXipFvvmkK%2FjndNU36S2miEYM0yZ8euXBVnpJ7%2FN02ngBMiXWndXR2dYjjhOFhaxnOddCPdKmpt95530aUau7tT"
}