Research output: Contribution to journal › Article › peer-review
Sensitivity of nanocrystalline tungsten oxide to CO and ammonia gas determined by surface catalysts. / Marikutsa, Artem; Yang, Lili; Rumyantseva, Marina; Batuk, Maria; Hadermann, Joke; Gaskov, Alexander.
In: Sensors and Actuators, B: Chemical, Vol. 277, 20.12.2018, p. 336-346.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Sensitivity of nanocrystalline tungsten oxide to CO and ammonia gas determined by surface catalysts
AU - Marikutsa, Artem
AU - Yang, Lili
AU - Rumyantseva, Marina
AU - Batuk, Maria
AU - Hadermann, Joke
AU - Gaskov, Alexander
N1 - Funding Information: The work was financially supported by RFBR grant No. 16-53-76001 (RFBR – ERA.Net FONSENS 096). This work was supported in part by a grant from the St. Petersburg State University – Event 3-2018(id: 26520408). Publisher Copyright: © 2018 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2018/12/20
Y1 - 2018/12/20
N2 - Nanocrystalline tungsten oxide with variable particle size and surface area was synthesized by aqueous deposition and heat treatment for use in resistive gas sensors. Surface modification with 1 wt.% Pd and Ru was performed by impregnation to improve the sensitivity to CO and ammonia. Acid and oxidation surface sites were evaluated by temperature-programmed techniques using probe molecules. The surface acidity dropped with increasing particle size, and was weakly affected by additives. Lower crystallinity of WO3 and the presence of Ru species favoured temperature-programmed reduction of the materials. Modifying WO3 increased its sensitivity, to CO at ambient condition for modification by Pd and to NH3 at elevated temperature for Ru modification. An in situ infrared study of the gas – solid interaction showed that the catalytic additives change the interaction route of tungsten oxide with the target gases and make the reception of detected molecules independent of the semiconductor oxide matrix.
AB - Nanocrystalline tungsten oxide with variable particle size and surface area was synthesized by aqueous deposition and heat treatment for use in resistive gas sensors. Surface modification with 1 wt.% Pd and Ru was performed by impregnation to improve the sensitivity to CO and ammonia. Acid and oxidation surface sites were evaluated by temperature-programmed techniques using probe molecules. The surface acidity dropped with increasing particle size, and was weakly affected by additives. Lower crystallinity of WO3 and the presence of Ru species favoured temperature-programmed reduction of the materials. Modifying WO3 increased its sensitivity, to CO at ambient condition for modification by Pd and to NH3 at elevated temperature for Ru modification. An in situ infrared study of the gas – solid interaction showed that the catalytic additives change the interaction route of tungsten oxide with the target gases and make the reception of detected molecules independent of the semiconductor oxide matrix.
KW - Ammonia
KW - Carbon monoxide
KW - Chemical modification
KW - Gas sensor
KW - Selectivity
KW - Tungsten oxide
UR - http://www.scopus.com/inward/record.url?scp=85053287842&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2018.09.004
DO - 10.1016/j.snb.2018.09.004
M3 - Article
AN - SCOPUS:85053287842
VL - 277
SP - 336
EP - 346
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -
ID: 36324682