Synthesis and characterization of alkoxide-derived Pt nanoparticles

被引:8
作者
Andreas, HA [1 ]
Birss, VI [1 ]
机构
[1] Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada
关键词
D O I
10.1021/jp045811u
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Identification of the species formed during the in situ reduction of hexachloroplatinic acid by sodium ethoxide, forming a Pt sot, is made. The solution phase is shown to consist of suspended metallic Pt nanoparticles (1-3 nm in diameter), acetaldehyde, and a Pt(II) species, identified by NMR and X-ray adsorption near-edge spectroscopy (XANES) to be NaPtCl3(C2H4), a sodium analogue of Zeise's salt [KPtCl3(CH4)]. The NaPtCl3(C2H4) product exhibits greater stability in both ethanol and air than the conventional Zeise's salt, providing a means of storing the useful Zeise's anion [PtCl3(C,H-4)(-)]. Electrochemistry, X-ray diffraction (XRD), and transmission electron microscopy (TEM) analyses have shown that the precipitate phase formed during the synthesis is composed solely of Pt particles similar to6 nm in diameter and NaCl. Thermal gravimetric analysis/ differential scanning calorimetry (TGA/DSC) showed that the color of the precipitate is an accurate gauge of the ratio of Pt to NaCl, with the lightest to darkest precipitates containing from 1% to 40% nanoparticulate Pt by mass, respectively. A comprehensive characterization of both phases formed has allowed us to propose a mechanism for the conversion of hexachloroplatinic acid to Pt nanoparticles.
引用
收藏
页码:3743 / 3750
页数:8
相关论文
共 40 条
[1]  
AIKA K, 1976, J RES I CAT HOKKAIDO, V24, P54
[2]   Complex compounds of the olefins with metallic salts part I Zeise's salt [J].
Anderson, JS .
JOURNAL OF THE CHEMICAL SOCIETY, 1934, :971-974
[3]  
ANDREAS H, UNPUB J ELECTROANAL
[4]  
ANDREAS H, UNPUB ELECTROCHIM AC
[5]  
ANDREAS H, UNPUB J PHYS CHEM
[6]   Composition, structure, and electrochemical behavior of sol-gel derived nanoparticulate Pt thin films [J].
Andreas, HA ;
Birss, VI .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (11) :A1481-A1488
[7]   Study on the formation of Pt/C catalysts by non-oxidized active carbon support and a sulfur-based reducing agent [J].
Antolini, E ;
Cardellini, F ;
Giacometti, E ;
Squadrito, G .
JOURNAL OF MATERIALS SCIENCE, 2002, 37 (01) :133-139
[8]  
ATKINS P, 1994, PHYS CHEM, P730
[9]   Electrochemical characterization of sol-gel formed Ir metal nanoparticles [J].
Birss, VI ;
Andreas, H ;
Serebrennikova, I ;
Elzanowska, H .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 1999, 2 (07) :326-329
[10]   Nanoscale colloidal metals and alloys stabilized by solvents and surfactants - Preparation and use as catalyst precursors [J].
Bonnemann, H ;
Braun, G ;
Brijoux, W ;
Brinkmann, R ;
Tilling, AS ;
Seevogel, K ;
Siepen, K .
JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1996, 520 (1-2) :143-162