Abstract
We report the synthesis of metal-chalcogenide aerogels from Pt 2+ and polysulfide clusters ([S x] 2-, x = 3-6). The cross-linking reaction of these ionic building blocks in formamide solution results in spontaneous gelation and eventually forms a monolithic dark brown gel. The wet gel is transformed into a highly porous aerogel by solvent exchanging and subsequent supercritical drying with CO 2. The resulting platinum polysulfide aerogels possess a highly porous and amorphous structure with an intact polysulfide backbone. These chalcogels feature an anionic network that is charged balanced with potassium cations, and hosts highly accessible S-S bonding sites, which allows for reversible cation exchange and mercury vapor capture that is superior to any known material.
Original language | English (US) |
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Pages (from-to) | 14604-14608 |
Number of pages | 5 |
Journal | Journal of the American Chemical Society |
Volume | 134 |
Issue number | 35 |
DOIs | |
State | Published - Sep 5 2012 |
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
- Biochemistry
- Colloid and Surface Chemistry