Improvement of In₂O₃-Based CO Sensor by Using Surface Modifiers

• Yamaura Hiroyuki

  Kyushu University

• Tamaki Jun

  Ritsumeikan University

• Moriya Kouji

  Osaka Gas Co. Ltd.

• Miura Norio

  Kyushu University

• Yamazoe Noboru

  Kyushu University

Bibliographic Information

Other Title

• 表面修飾剤による酸化インジウム系素子のCO検知特性の改善
• ヒョウメン シュウショクザイ ニヨル サンカ インジウムケイ ソシ ノ CO

Abstract

Aiming at developing a semiconductor CO sensor applicable to the safety control of gas appliances, we carried out an extensive material search for promoters to In₂O₃-based elements. Among the elements added (0.5 wt%) with each of 12 transition metal oxides, the Co₃O₄-added one was outstanding in sensitivity and selectivity to CO at 200°C. Remarkably the sensing properties of this element could be improved further by the addition of Au (0.04 wt%). The doubly promoted element, Au (0.04 wt%)-Co(0.5 wt%)-In₂O₃, gave excellent characteristics in sensitivity to CO, selectivity to CO over H2 and other selected gases, and response rates at 250°C. The promoting effects of the additives were shown to originate from the proper enhancement of catalytic activity for CO oxidation.

Journal

• IEEJ Transactions on Sensors and Micromachines

  IEEJ Transactions on Sensors and Micromachines 118 (2), 100-105, 1998

  The Institute of Electrical Engineers of Japan

Keywords

• 半導体ガスセンサ
• COセンサ
• 不完全燃焼
• 表面修飾
• 酸化インジウム
• 金

Details

• CRID: 1390282679439421824
• NII Article ID: 10004833144
• NII Article ID: 10004834140
• NII Book ID: AN1052634X
• DOI: 10.1541/ieejsmas.118.100
• ISSN: 13475525
• ISSN: 13418939
• NDL BIB ID: 4392291
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4392291
• Web Site: http://www.jstage.jst.go.jp/article/ieejsmas1995/118/2/118_2_100/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed