Formation of sulfhydryl (SH) species on the clean and (2 × 2)-S covered Pt(111) surfaces by H2S decomposition

✍ Scribed by R.J. Koestner; M. Salmerón; E.B. Kollin; J.L. Gland

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 460 KB
• Volume: 125
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(86)85090-4

✦ Synopsis

H,S decomposition on the clean and (2 x 2)-S covered Pt(ll1) surfaces has been characterized using high-resolution electron energy loss (HREELS) and temperature-programmed desorption (TPD) spectroscopies. On the Pt(lll)-(2x2)-S surface, a mixture of molecular H,S and sulfhydryl (SH) species forms following H,S adsorption at 110 K. The molecular H,S desorbs at 140 K leaving a (2 X2)-S overlayer saturated with SH; the SH is stable up to 190 K. On the clean Pt(ll1) surface, a mixture of atomic sulfur, SH and chemisorbed molecular HsS is formed following H,S adsorption at 110 K. On the clean surface, adsorbed SH decomposes near 150 K. We report here the first definitive observation of an adsorbed sulfhydryl species on a metal surface.