Thin films of supported gold catalysts for CO detection

✍ Scribed by Tetsuhiko Kobayashi; Masatake Haruta; Susumu Tsubota; Hiroshi Sano; Bernard Delmon

• Book ID: 103960130
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 413 KB
• Volume: 1
• Category: Article
• ISSN: 0925-4005
• DOI: 10.1016/0925-4005(90)80205-e

✦ Synopsis

Thin films of gold catalysts supported on Co,O, are prepared by magnetron r.f. sputtering deposition in an attempt to develop an optical fibre catalytic gas sensor. Only co-sputtering of Au and Co,O, can produce catalytic films having CO oxidation activities higher than that of an Au-free Co,O, film. The Au/Co,O, films are much more active than Pt film catalysts. A prototype model device of the gas sensor, fabricated from the active Au/Co,O, film in combination with a temperature-sensing device, gives an output temperature increase of about 7" to 1 vol.% of CO in air at a device temperature of 150 "C.