A kind of PT-based metal nanocluster-metal oxide nanocomposite material and its preparation method and application
A technology of nanocomposite materials and metal nanoclusters, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of metal nanocluster aggregation, poor catalytic performance, and low utilization rate of precious metals, etc. Achieve narrow particle size distribution, good electrical conductivity, and increase the efficiency of electrical energy-chemical energy conversion
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Embodiment 1
[0058] Embodiment 1, PtIn / In 2 o 3 (In 2 o 3 , indium oxide, Pt content: 43wt%) preparation and properties of nanocomposites
[0059] 1g H 2 PtCl 6 ·6H 2 O was dissolved in 50mL ethylene glycol, and the resulting solution was mixed with 50mL NaOH in ethylene glycol solution (0.26mol / L), and the 2 The mixture was stirred under atmosphere and heated to 433 K using a microwave for 5 min under N 2 Cool to room temperature under atmosphere to prepare a colloidal solution of Pt metal nanoclusters with a Pt concentration of 3.7 g / L.
[0060] 37mg indium oxide (In 2 o 3 ) was dispersed in 25mL deionized water, and ultrasonically treated for 30 minutes to prepare In 2 o 3 Dispersions.
[0061] The prepared Pt metal nanocluster colloidal solution (10mL) was added to In 2 o 3 in the dispersion. The resulting mixture was placed in an autoclave, and H 2 , seal the above system, heat treatment at 433K for 4 hours. Filter and wash the resulting precipitate, and dry it in a v...
Embodiment 2
[0079] Embodiment 2, preparation and performance of PtInSn / ITO (ITO, indium tin oxide, Pt content: 47wt%) nanocomposite
[0080] According to the method described in Example 1, the heat treatment method in the preparation of the Pt metal nano cluster colloid was changed to oil bath heating to 433K and maintained for 3 hours, and other conditions were unchanged, and the Pt metal nano cluster with a Pt concentration of 3.7g / L was obtained. Cluster colloid solution.
[0081] According to the method described in Example 1, the indium oxide in Example 1 was replaced with indium tin oxide (ITO), and other conditions remained unchanged, to prepare an ITO dispersion.
[0082] The prepared Pt metal nanocluster colloidal solution (10 mL) was added to the ITO dispersion. The resulting mixture was placed in an autoclave, and H 2 , seal the above system, heat treatment at 453K for 6 hours. The resulting precipitate is filtered, washed, and vacuum-dried to obtain a PtInSn / ITO nanocomposi...
Embodiment 3
[0088] Embodiment 3, PtSn / SnO 2 (SnO 2 , tin oxide, Pt content: 27wt%) preparation and properties of nanocomposites
[0089] 2g H 2 PtCl 6 ·6H 2 O was dissolved in 50 mL of ethylene glycol, and the resulting solution was mixed with 50 mL of NaOH in ethylene glycol (0.52 mol / L), and the 2 The mixture was stirred under atmosphere and heated to 423 K using a microwave for 10 min under N 2 Cool to room temperature under atmosphere to prepare a colloidal solution of Pt metal nanoclusters with a Pt concentration of 7.4 g / L.
[0090] According to the method described in Example 2, tin oxide (SnO 2 ) to replace the indium tin oxide in Example 2, and other conditions remain unchanged, to obtain SnO 2 Dispersions.
[0091] The prepared Pt metal nanocluster colloidal solution (2.5mL) was added to the SnO 2 in the dispersion. The resulting mixture was placed in an autoclave, and N 2 and H 2 , seal the above system, heat treatment at 473K for 2 hours. The resulting precipitate...
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