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

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Title: Improvement of a Real Gas-Sensor for the Origin of Methane Selectivity Degradation by mu-XAFS Investigation
Authors: Wada, Takahiro Browse this author →KAKEN DB
Murata, Naoyoshi Browse this author
Suzuki, Takuya Browse this author
Uehara, Hiromitsu Browse this author
Nitani, Hiroaki Browse this author
Niwa, Yasuhiro Browse this author
Uo, Motohiro Browse this author →KAKEN DB
Asakura, Kiyotaka Browse this author →KAKEN DB
Keywords: Micro gas sensor
Micro-XAFS
Pd/Al2O3
Deactivation
Issue Date: Jul-2015
Publisher: Springer
Journal Title: Nano-micro letters
Volume: 7
Issue: 3
Start Page: 255
End Page: 260
Publisher DOI: 10.1007/s40820-015-0035-7
Abstract: We have directly investigated the chemical state of the Pd species in a real mu-gas sensor device by examining the mu-fluorescence X-ray absorption fine structure. The mu-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 mu-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.
Rights: ©The Author(s) 2015. This article is published with open access at Springerlink.com
http://creativecommons.org/licenses/by/2.0/
Type: article
URI: http://hdl.handle.net/2115/59551
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 朝倉 清高

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