SO₂ adsorption and desorption, and species formed, on Pd/Pt bimetallic, γ-Al₂O₃ supported catalysts were characterized as a function of Pd/Pt ratio using DRIFTS and TPD studies. Catalysts with a high Pd content tended to form a greater amount of aluminum sulfate species, which decomposed at high temperature. In contrast, low Pd content catalysts tended to form a greater amount of low-temperature decomposing and desorbing species, such as molecular SO₂ and alumina surface sulfite. The amount of SO₂ adsorbed and later desorbed during TPD decreased with increasing Pt content in the bimetallic Pd-Pt/Al₂O₃ catalysts.

中文翻译：

---

双金属Pd-Pt催化剂的SO ₂吸附和解吸特性：Pd：Pt比依赖性

SO ₂的吸附和解吸，并形成物种，在Pd / Pt为双金属，在γ-Al _2种ö ₃载体上的催化剂进行了表征如使用DRIFTS和TPD研究中的Pd / Pt为比功能。Pd含量高的催化剂倾向于形成大量的硫酸铝，这些硫酸铝在高温下会分解。相反，低Pd含量的催化剂倾向于形成大量的低温分解和解吸物质，例如分子SO ₂和氧化铝表面亚硫酸盐。TPD期间吸附和随后解吸的SO ₂量随着双金属Pd-Pt / Al ₂ O ₃催化剂中Pt含量的增加而降低。