CN104014786A - Au3Ni/Pt alloy nano particle and preparation method and application of Au3Ni/Pt alloy nano particle - Google Patents
Au3Ni/Pt alloy nano particle and preparation method and application of Au3Ni/Pt alloy nano particle Download PDFInfo
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- CN104014786A CN104014786A CN201410199976.6A CN201410199976A CN104014786A CN 104014786 A CN104014786 A CN 104014786A CN 201410199976 A CN201410199976 A CN 201410199976A CN 104014786 A CN104014786 A CN 104014786A
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- nano particle
- alloy nano
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Abstract
The invention discloses an Au3Ni/Pt alloy nano particle. The Au3Ni/Pt alloy nano particle is of a core-shell structure, wherein the core is made of Au3Ni, and the shell is made of Pt. The Au3Ni/Pt alloy nano particle is mixed with an H2PtCl6 solution and then is heated to be at 70-90 DEG C, ascorbic acid is added to react for 20-40 min, and then the Au3Ni/Pt alloy nano particle is obtained. The Au3Ni/Pt alloy nano particle can obviously improve the catalytic activity of the Pt and has a good electrochemical catalytic oxidation function for formic acid.
Description
Technical field
The invention belongs to alloy nano-material field, be specifically related to a kind of Au
3ni/Pt alloy nano particle and its preparation method and application.
Background technology
The noble metals such as Au, Pt, Pd have good catalytic activity, are commonly used for the catalyst of organic synthesis, fuel cell, and due to the costliness of the rare and price of noble metal, the catalytic activity that how to improve noble metal has extremely important meaning.
Summary of the invention
The object of this invention is to provide a kind of Au of excellent catalytic effect
3ni/Pt alloy nano particle, with and its preparation method and application.
It is as follows that the present invention realizes the technical scheme that above-mentioned purpose adopts:
A kind of Au
3ni/Pt alloy nano particle, described nano particle has nucleocapsid structure, and wherein, described core is Au
3ni, described shell is Pt.
Above-mentioned Au
3the preparation method of Ni/Pt alloy nano particle, comprising: by Au
3ni nano particle and H
2ptCl
6solution mixes, and is then heated to 70-90 DEG C, then adds ascorbic acid reaction 20-40min, obtains Au
3ni/Pt alloy nano particle.
Further, described Au
3ni nano particle and H
2ptCl
6mass ratio be 1:(2-3).
Further, described ascorbic acid and H
2ptCl
6mol ratio be 1:(4-6).
Above-mentioned Au
3ni/Pt alloy nano particle is as the catalyst of formic acid electrochemical oxidation.
Brief description of the drawings
Fig. 1 is Au of the present invention
3the X-ray diffraction spectrogram of Ni alloy nano particle.
Fig. 2 is Au
3the transmission electron microscope spectrogram of Ni alloy nano particle.
Fig. 3 is Au
3the transmission electron microscope of Ni/Pt alloy nano particle and the spectrogram of SEAD thereof.
Fig. 4 is respectively Au
3ni/Pt (curve 1), Pt (curve 2) and Au
3the cyclic voltammogram of Ni (curve 3) modified electrode in the mixed solution of formic acid (0.5 mol/L) and sulfuric acid (0.5 mol/L).
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further details.
Embodiment 1
By Au
3ni alloy nano particle is scattered in water with the concentration of 3 mg/mL, by 0.5 mL Au
3ni dispersion liquid joins 10 mL 1mmol/L H
2ptCl
6solution, stir, be heated to 80 DEG C, then add 5 mL 10 mmol/L ascorbic acid solutions, at 80 DEG C, leave standstill 30 min, solution becomes brownish black, solution is in centrifugal 5 min of 6000 rpm/min, and gained solid is scattered in water again, then in centrifugal 5 min of 7000 rpm/min, gained solid is dry in 60 DEG C of baking ovens, the Au obtaining
3ni/Pt alloy nano particle.
Embodiment 2
By Au
3ni alloy nano particle is scattered in water with the concentration of 3 mg/mL, by 0.68 mL Au
3ni dispersion liquid joins 10 mL 1mmol/L H
2ptCl
6solution, stir, be heated to 70 DEG C, then add 6 mL 10 mmol/L ascorbic acid solutions, at 70 DEG C, leave standstill 40 min, solution becomes brownish black, solution is in centrifugal 5 min of 6000 rpm/min, and gained solid is scattered in water again, then in centrifugal 5 min of 7000 rpm/min, gained solid is dry in 60 DEG C of baking ovens, the Au obtaining
3ni/Pt alloy nano particle.
Embodiment 3
By Au
3ni alloy nano particle is scattered in water with the concentration of 3 mg/mL, by 0.45 mL Au
3ni dispersion liquid joins 10 mL 1mmol/L H
2ptCl
6solution, stir, be heated to 90 DEG C, then add 4mL 10 mmol/L ascorbic acid solutions, at 90 DEG C, leave standstill 20 min, solution becomes brownish black, solution is in centrifugal 5 min of 6000 rpm/min, and gained solid is scattered in water again, then in centrifugal 5 min of 7000 rpm/min, gained solid is dry in 60 DEG C of baking ovens, the Au obtaining
3ni/Pt alloy nano particle.
Au
3the concrete preparation process reference of Ni alloy nano particle: Low-Temperature Solution Synthesis of the Non-Equilibrium Ordered Intermetallic Compounds Au
3fe, Au
3co, and Au
3ni as Nanocrystals, Yolanda Vasquez, Zhiping Luo and Raymond E. Schaak, J. Am. Chem. Soc., 2008,130 (36), pp 11866 – 11867.
Can see Au by Fig. 2
3the TEM spectrogram of Ni alloy nano particle is smooth surface, can be seen by Fig. 3, works as Au
3ni alloy nanoparticle sub-surface becomes uneven because there being the covering of Pt, particle diameter 10-30nm left and right.SEAD spectrogram for particle surface region presents circular diffraction, illustrates that the alloy surface region of preparation is to be polycrystalline state.
Electrochemical catalysis
Glass-carbon electrode is polished to minute surface with the alundum (Al2O3) suspension of 0.3 μ m, 0.05 μ m successively, then through volumn concentration is ethanol, the redistilled water ultrasonic cleaning of 95 % successively, for subsequent use;
By Au of the present invention
3ni/Pt alloy nano particle, above-mentioned Au
3ni synthesizing nano-particle and Pt nano particle (particle diameter 20nm left and right) are scattered in respectively in ethanol, and dispersion liquid concentration is 3mg/ml, gets 5 μ L dispersant liquid drops and is coated onto glass-carbon electrode surface, and room temperature is placed 2 hours and dried, and obtains respectively Au
3ni, Pt and Au
3the glass-carbon electrode that Ni/Pt alloy nano particle is modified.
Respectively with Au
3ni, Pt and Au
3the glass-carbon electrode of Ni/Pt Nanoparticle Modified is working electrode, platinum is is reference electrode to electrode, Ag/AgCl, the three-electrode system of composition, three-electrode system is inserted in the mixed solution of formic acid (0.5 mol/L) and sulfuric acid (0.5 mol/L), in the scope of 1.0 V, carry out cyclic voltammetry scanning (Bio-Logic SA multi-channel electrochemical work station) at potential window-0.2 V, sweeping speed is 50 mvs
-1, obtain Catalyzed by Formic Acid curve as shown in Figure 4, the oxidation peak current of formic acid is respectively to 0.04 mA/cm
2(Au
3ni modified electrode), 21.4 mA/cm
2(Pt modified electrode) and 25.6 mA/cm
2(Au
3ni/Pt modified electrode), can find out, compared with Pt nano particle, Au
3the peak current of Ni/Pt alloy nano particle improves 20% left and right, and compound Au is described
3ni/Pt alloy can obviously improve the catalytic activity of Pt, and formic acid is had to better electrochemical catalytic oxidation effect.
Claims (5)
1. an Au
3ni/Pt alloy nano particle, described nano particle has nucleocapsid structure, and wherein, described core is Au
3ni, described shell is Pt.
2. Au described in claim 1
3the preparation method of Ni/Pt alloy nano particle, comprising: by Au
3ni nano particle and H
2ptCl
6solution mixes, and is then heated to 70-90 DEG C, then adds ascorbic acid reaction 20-40min, obtains Au
3ni/Pt alloy nano particle.
3. preparation method according to claim 2, is characterized in that, described Au
3ni nano particle and H
2ptCl
6mass ratio be 1:(2-3).
4. preparation method according to claim 2, is characterized in that, described ascorbic acid and H
2ptCl
6mol ratio be 1:(4-6).
5. Au described in claim 1
3ni/Pt alloy nano particle is as the catalyst of formic acid electrochemical oxidation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199976.6A CN104014786A (en) | 2014-05-13 | 2014-05-13 | Au3Ni/Pt alloy nano particle and preparation method and application of Au3Ni/Pt alloy nano particle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199976.6A CN104014786A (en) | 2014-05-13 | 2014-05-13 | Au3Ni/Pt alloy nano particle and preparation method and application of Au3Ni/Pt alloy nano particle |
Publications (1)
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|---|---|
| CN104014786A true CN104014786A (en) | 2014-09-03 |
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ID=51431942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410199976.6A Pending CN104014786A (en) | 2014-05-13 | 2014-05-13 | Au3Ni/Pt alloy nano particle and preparation method and application of Au3Ni/Pt alloy nano particle |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1228803A1 (en) * | 2001-01-31 | 2002-08-07 | Basf Aktiengesellschaft | Shaped catalytic body consisting of a coated core |
| US20130264198A1 (en) * | 2012-04-10 | 2013-10-10 | Brookhaven Science Associates, Llc | Synthesis of Nanoparticles Using Ethanol |
| CN103638925A (en) * | 2013-11-15 | 2014-03-19 | 华南理工大学 | Core-shell structure catalyst for fuel cells and its pulse electrodeposition preparation method |
-
2014
- 2014-05-13 CN CN201410199976.6A patent/CN104014786A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1228803A1 (en) * | 2001-01-31 | 2002-08-07 | Basf Aktiengesellschaft | Shaped catalytic body consisting of a coated core |
| US20130264198A1 (en) * | 2012-04-10 | 2013-10-10 | Brookhaven Science Associates, Llc | Synthesis of Nanoparticles Using Ethanol |
| CN103638925A (en) * | 2013-11-15 | 2014-03-19 | 华南理工大学 | Core-shell structure catalyst for fuel cells and its pulse electrodeposition preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 饶贵仕: "Aucore@Ptshell纳米粒子上C1有机小分子电催化氧化的原位SERS研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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Application publication date: 20140903 |
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