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Pt nanoparticles using common anions or small molecules as shape-directing agents : observation of a strong halide or pseudo-halide e ff ect †
| Content Provider | Semantic Scholar |
|---|---|
| Author | Michel, Jason A. Morris, William H. Lukehart, Charles M. |
| Copyright Year | 2015 |
| Abstract | Chemical reduction of Pt(II) and Pt(IV) salts by H2, hydrazine, or borohydride ion, in the presence of common anions or small molecules is surveyed to discover shape-directing agents suitable for selective formation of Pt metal nanocubes or nanotetrahedra. Surfactants tested include a variety of amino acids, HSCH2CO2H, Ph2PCH2CO2H, polycarboxylate species, such as glycolate or tartrate ion, and several common anions (including CF3SO3 , ClO4 , NO3 , CO3 2 , PO4 3 , SO4 2 , Cl , Br , or I ). Although carboxylate, chloride, bromide, carbonate, nitrate, perchlorate, phosphate, sulfate, or triflate ions show poor shape-directing influence, the presence of hydroxide and iodide ions gives an unexpected halide (or pseudo-halide) effect. Hydrogen reduction of [Pt(OH)6] 2 ion at basic pH gives high yields of cubic Pt nanoparticles, while hydrogen reduction of [PtI6] 2 ion at basic pH gives high yields of tetrahedral Pt nanoparticles. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2015/ta/c4ta05952b |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
