Improvement of a Real Gas-Sensor for the Origin of Methane Selectivity Degradation by µ-XAFS Investigation

We have directly investigated the chemical state of the Pd species in a real μ-gas sensor device by examining the μ-fluorescence X-ray absorption fine structure. The μ-gas sensor device was heavily damaged by a heating process in which the temperature was ill-controlled, resulting in decrease of met...

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Autores principales: Wada, Takahiro, Murata, Naoyoshi, Suzuki, Takuya, Uehara, Hiromitsu, Nitani, Hiroaki, Niwa, Yasuhiro, Uo, Motohiro, Asakura, Kiyotaka
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6223894/
https://www.ncbi.nlm.nih.gov/pubmed/30464969
http://dx.doi.org/10.1007/s40820-015-0035-7
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author Wada, Takahiro
Murata, Naoyoshi
Suzuki, Takuya
Uehara, Hiromitsu
Nitani, Hiroaki
Niwa, Yasuhiro
Uo, Motohiro
Asakura, Kiyotaka
author_facet Wada, Takahiro
Murata, Naoyoshi
Suzuki, Takuya
Uehara, Hiromitsu
Nitani, Hiroaki
Niwa, Yasuhiro
Uo, Motohiro
Asakura, Kiyotaka
author_sort Wada, Takahiro
collection PubMed
description We have directly investigated the chemical state of the Pd species in a real μ-gas sensor device by examining the μ-fluorescence X-ray absorption fine structure. The μ-gas sensor device was heavily damaged by a heating process in which the temperature was ill-controlled, resulting in decrease of methane selectivity. We found that the PdO in the fresh μ-gas sensor was reduced to Pd metal particles as the methane selectivity decreased. Based on the investigation results, we modified the device structure so as to heat up homogeneously. The lifetime of the sensor was then successfully increased by more than 5 years.
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spelling pubmed-62238942018-11-19 Improvement of a Real Gas-Sensor for the Origin of Methane Selectivity Degradation by µ-XAFS Investigation Wada, Takahiro Murata, Naoyoshi Suzuki, Takuya Uehara, Hiromitsu Nitani, Hiroaki Niwa, Yasuhiro Uo, Motohiro Asakura, Kiyotaka Nanomicro Lett Article We have directly investigated the chemical state of the Pd species in a real μ-gas sensor device by examining the μ-fluorescence X-ray absorption fine structure. The μ-gas sensor device was heavily damaged by a heating process in which the temperature was ill-controlled, resulting in decrease of methane selectivity. We found that the PdO in the fresh μ-gas sensor was reduced to Pd metal particles as the methane selectivity decreased. Based on the investigation results, we modified the device structure so as to heat up homogeneously. The lifetime of the sensor was then successfully increased by more than 5 years. Springer Berlin Heidelberg 2015-02-17 /pmc/articles/PMC6223894/ /pubmed/30464969 http://dx.doi.org/10.1007/s40820-015-0035-7 Text en © The Author(s) 2015 https://creativecommons.org/licenses/by/4.0/ Open AccessThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
spellingShingle Article
Wada, Takahiro
Murata, Naoyoshi
Suzuki, Takuya
Uehara, Hiromitsu
Nitani, Hiroaki
Niwa, Yasuhiro
Uo, Motohiro
Asakura, Kiyotaka
Improvement of a Real Gas-Sensor for the Origin of Methane Selectivity Degradation by µ-XAFS Investigation
title Improvement of a Real Gas-Sensor for the Origin of Methane Selectivity Degradation by µ-XAFS Investigation
title_full Improvement of a Real Gas-Sensor for the Origin of Methane Selectivity Degradation by µ-XAFS Investigation
title_fullStr Improvement of a Real Gas-Sensor for the Origin of Methane Selectivity Degradation by µ-XAFS Investigation
title_full_unstemmed Improvement of a Real Gas-Sensor for the Origin of Methane Selectivity Degradation by µ-XAFS Investigation
title_short Improvement of a Real Gas-Sensor for the Origin of Methane Selectivity Degradation by µ-XAFS Investigation
title_sort improvement of a real gas-sensor for the origin of methane selectivity degradation by µ-xafs investigation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6223894/
https://www.ncbi.nlm.nih.gov/pubmed/30464969
http://dx.doi.org/10.1007/s40820-015-0035-7
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