Aksenenko, Anatoly

Batuk, Maria

Filatova, Darya

Gaskov, Alexander

Hadermann, Joke

Khmelevsky, Nikolay

Krivetskiy, Valeriy

Kutukov, Pavel

Rumyantseva, Marina

Abstract: To obtain a nanocrystalline SnO2 matrix and mono- and bimetallic nanocomposites SnO2/Pd, SnO2/Pt, and SnO2/PtPd, a flame spray pyrolysis with subsequent impregnation was used. The materials were characterized using X-ray diffraction (XRD), a single-point BET method, transmission electron microscopy (TEM), and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) with energy dispersive X-ray (EDX) mapping. The electronic state of the metals in mono- and bimetallic clusters was determined using X-ray photoelectron spectroscopy (XPS). The active surface sites were investigated using the Fourier Transform infrared spectroscopy (FTIR) and thermo-programmed reduction with hydrogen (TPR-H2) methods. The sensor response of blank SnO2 and nanocomposites had a carbon monoxide (CO) level of 6.7 ppm and was determined in the temperature range 60300 \ub0C in dry (Relative Humidity (RH) = 0%) and humid (RH = 20%) air. The sensor properties of the mono- and bimetallic nanocomposites were analyzed on the basis of information on the electronic state, the distribution of modifiers in SnO2 matrix, and active surface centers. For SnO2/PtPd, the combined effect of the modifiers on the electrophysical properties of SnO2 explained the inversion of sensor response from n- to p-types observed in dry conditions

Institutional Repository Universiteit Antwerpen

Influence of mono- and bimetallic <tex>PtO_{x}$</tex>, <tex>PdO_{x}$</tex>, <tex>PtPdO_{x}$</tex> clusters on CO sensing by <tex>SnO_{2}$</tex> based gas sensors

Influence of mono- and bimetallic <tex>PtO_{x} $</tex>, <tex>PdO_{x}$ </tex>, <tex>PtPdO_{x} $</tex> clusters on CO sensing by <tex>SnO_{2}$ </tex> based gas sensors

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Institutional Repository Universiteit Antwerpen

Influence of mono- and bimetallic <tex>PtO_{x}</tex>,<tex>PdOx</tex>, <tex>PdO_{x}</tex>,<tex>PdOx​</tex>, <tex>PtPdO_{x}</tex>clustersonCOsensingby<tex>SnO2</tex> clusters on CO sensing by <tex>SnO_{2}</tex>clustersonCOsensingby<tex>SnO2​</tex> based gas sensors

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Institutional Repository Universiteit Antwerpen

Influence of mono- and bimetallic <tex>PtO_{x} $</tex>, <tex>PdO_{x}$ </tex>, <tex>PtPdO_{x} $</tex> clusters on CO sensing by <tex>SnO_{2}$ </tex> based gas sensors