A comparative study of SnO2 and CrOx/SnO2 powders: their microstructures and their different response to CO, NO, H2 and CH4 atmospheres

Giovanna Ghiotti; Anna Chiorino; Wei Xiong Pan; Leonardo Marchese

doi:10.1016/0925-4005(92)80387-D

A comparative study of SnO₂ and CrO_x/SnO₂ powders: their microstructures and their different response to CO, NO, H₂ and CH₄ atmospheres

Giovanna Ghiotti, Anna Chiorino, Wei Xiong Pan, Leonardo Marchese

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

Pure SnO₂ and CrO_x/SnO₂ powders with different crystalline sizes have been prepared and characterized by surface-area measurements, TEM measurements, UV-Vis-NIR diffuse reflectance and FT-IR absorption-transmission spectroscopies. The chemical and electronic responses of the samples on interaction with CO, NO, H₂, CH₄ at room temperature (RT) have also been studied. The responses are highly affected by the presence of chromium oxide, as revealed by FT-IR measurements. The electronic response to CO and H₂ is lowered and no electronic response is detected for CH₄ when chromium oxide is present. The electronic response to NO is enhanced or lowered by the presence of chromium oxide, depending on the thermal pretreatment.

Lingua originale	Inglese
pagine (da-a)	691-699
Numero di pagine	9
Rivista	Sensors and Actuators B: Chemical
Volume	7
Numero di pubblicazione	1-3
DOI	https://doi.org/10.1016/0925-4005(92)80387-D
Stato di pubblicazione	Pubblicato - mar 1992
Pubblicato esternamente	Sì

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10.1016/0925-4005(92)80387-D

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title = "A comparative study of SnO2 and CrOx/SnO2 powders: their microstructures and their different response to CO, NO, H2 and CH4 atmospheres",

abstract = "Pure SnO2 and CrOx/SnO2 powders with different crystalline sizes have been prepared and characterized by surface-area measurements, TEM measurements, UV-Vis-NIR diffuse reflectance and FT-IR absorption-transmission spectroscopies. The chemical and electronic responses of the samples on interaction with CO, NO, H2, CH4 at room temperature (RT) have also been studied. The responses are highly affected by the presence of chromium oxide, as revealed by FT-IR measurements. The electronic response to CO and H2 is lowered and no electronic response is detected for CH4 when chromium oxide is present. The electronic response to NO is enhanced or lowered by the presence of chromium oxide, depending on the thermal pretreatment.",

author = "Giovanna Ghiotti and Anna Chiorino and {Xiong Pan}, Wei and Leonardo Marchese",

note = "Funding Information: The authors are grateful to the Italian CNR P.F. MADESS for financial support.",

year = "1992",

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doi = "10.1016/0925-4005(92)80387-D",

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T2 - their microstructures and their different response to CO, NO, H2 and CH4 atmospheres

AU - Ghiotti, Giovanna

AU - Chiorino, Anna

AU - Xiong Pan, Wei

AU - Marchese, Leonardo

N1 - Funding Information: The authors are grateful to the Italian CNR P.F. MADESS for financial support.

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AB - Pure SnO2 and CrOx/SnO2 powders with different crystalline sizes have been prepared and characterized by surface-area measurements, TEM measurements, UV-Vis-NIR diffuse reflectance and FT-IR absorption-transmission spectroscopies. The chemical and electronic responses of the samples on interaction with CO, NO, H2, CH4 at room temperature (RT) have also been studied. The responses are highly affected by the presence of chromium oxide, as revealed by FT-IR measurements. The electronic response to CO and H2 is lowered and no electronic response is detected for CH4 when chromium oxide is present. The electronic response to NO is enhanced or lowered by the presence of chromium oxide, depending on the thermal pretreatment.

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