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Acetone Sensing and Catalytic Conversion by Pd-Loaded SnO2

Authors :
Pascal M. Gschwend
Florian M. Schenk
Alexander Gogos
Sotiris E. Pratsinis
Source :
Materials, Vol 14, Iss 20, p 5921 (2021)
Publication Year :
2021
Publisher :
MDPI AG, 2021.

Abstract

Noble metal additives are widely used to improve the performance of metal oxide gas sensors, most prominently with palladium on tin oxide. Here, we photodeposit different quantities of Pd (0–3 mol%) onto nanostructured SnO2 and determine their effect on sensing acetone, a critical tracer of lipolysis by breath analysis. We focus on understanding the effect of operating temperature on acetone sensing performance (sensitivity and response/recovery times) and its relationship to catalytic oxidation of acetone through a packed bed of such Pd-loaded SnO2. The addition of Pd can either boost or deteriorate the sensing performance, depending on its loading and operating temperature. The sensor performance is optimal at Pd loadings of less than 0.2 mol% and operating temperatures of 200–262.5 °C, where acetone conversion is around 50%.

Details

Language :
English
ISSN :
19961944
Volume :
14
Issue :
20
Database :
Directory of Open Access Journals
Journal :
Materials
Publication Type :
Academic Journal
Accession number :
edsdoj.27f24d55d6b44de4b131dccb6d8d7af8
Document Type :
article
Full Text :
https://doi.org/10.3390/ma14205921