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Issue 34, 2016
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Structure and chemistry of surface-doped Pt:SnO2 gas sensing materials

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Abstract

Surface-doped Pt:SnO2 was synthesized by impregnation of calcined SnO2 made by an aqueous sol–gel route. The structure of the introduced Pt-dopant and its behaviour during gas exposure were examined by in situ and operando X-ray absorption spectroscopy. The results reveal that Pt forms a nano-sized PtO2 phase, which was not found for bulk and surface doped materials, studied previously. In a comparative investigation of undoped and Pt-doped SnO2 gas sensors the performance and the surface chemistry were investigated, the latter one using operando FT-IR spectroscopy. The results prove the strong influence of the different Pt structures on the surface chemistry of SnO2, providing the basis for an understanding on the varying sensor performance of differently synthesized Pt:SnO2 gas sensing materials.

Graphical abstract: Structure and chemistry of surface-doped Pt:SnO2 gas sensing materials

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Publication details

The article was received on 09 Dec 2015, accepted on 07 Mar 2016 and first published on 11 Mar 2016


Article type: Paper
DOI: 10.1039/C5RA26302F
Citation: RSC Adv., 2016,6, 28149-28155
  • Open access: Creative Commons BY-NC license
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    Structure and chemistry of surface-doped Pt:SnO2 gas sensing materials

    D. Degler, H. W. Pereira de Carvalho, K. Kvashnina, J. Grunwaldt, U. Weimar and N. Barsan, RSC Adv., 2016, 6, 28149
    DOI: 10.1039/C5RA26302F

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