WO2005092784A1 - Synthese de nanoparticules de platine et de palladium de la taille d'un puits quantique - Google Patents

Synthese de nanoparticules de platine et de palladium de la taille d'un puits quantique Download PDF

Info

Publication number
WO2005092784A1
WO2005092784A1 PCT/IN2004/000072 IN2004000072W WO2005092784A1 WO 2005092784 A1 WO2005092784 A1 WO 2005092784A1 IN 2004000072 W IN2004000072 W IN 2004000072W WO 2005092784 A1 WO2005092784 A1 WO 2005092784A1
Authority
WO
WIPO (PCT)
Prior art keywords
platinum
palladium
nano particles
ethylene glycol
range
Prior art date
Application number
PCT/IN2004/000072
Other languages
English (en)
Inventor
Madan Lal Singla
Mewa Singh
Dharam Veer Singh Jain
Ram Kishore
Ram Prakash Bajpai
Original Assignee
Council Of Scientific & Industrial Research
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Council Of Scientific & Industrial Research filed Critical Council Of Scientific & Industrial Research
Priority to PCT/IN2004/000072 priority Critical patent/WO2005092784A1/fr
Priority to CNA2004800428894A priority patent/CN1946628A/zh
Publication of WO2005092784A1 publication Critical patent/WO2005092784A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/02—Elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/44—Palladium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
    • B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/391—Physical properties of the active metal ingredient
    • B01J35/393—Metal or metal oxide crystallite size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/16—Reducing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
    • C30B29/605—Products containing multiple oriented crystallites, e.g. columnar crystallites
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
    • C30B7/02—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions by evaporation of the solvent
    • C30B7/06—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions by evaporation of the solvent using non-aqueous solvents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/12—Silica and alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0215—Coating

Definitions

  • TECHNICAL FIELD The present relates to a novel process for synthesis of platinum and palladium quantum well size nano-particles in ethylene gylcol medium in which ethylene glycol acts as a combined dispersing medium, reducing agent and capping agent.
  • BACKGROUND OF THE INVENTION The synthesis and properties of nano particles have commercial importance due to their potential utilization in catalysis, optoelectronic devices, photonics, magnetic and ultra sensitive chemical sensors. Many gas phase catalytic processes exhibit a pronounced, particle size dependence of catalytic activity.
  • the nano particles possess a very large surface to volume ratio; consequently the surface chemistry of nano-particles plays an important role. Control of particle size, the size distribution and particle shape leads to understanding of their specific properties.
  • the nano particles may consist of metals, ceramics and semi-conductors or even composites.
  • a number of methods such as photolytic reduction, radiolytic reduction, sono-chemical reduction method, micro emulsion technique, polyol process, reduction by alcohol and many other methods have been used for the synthesis of Pt & Pd metal nanoparticles.
  • different capping agents have been used alongwith different reducing agents. These capping agents are highly costly and perform under restricted conditions. Moreover, sometimes these add certain impurities also.
  • the Inventors adopt a simple process for the synthesis of Pt, Pd, and Au nano particles using ethylene glycol or glycerol where the same substance acts as dispersing media, self reducing agent and also capping agent.
  • alkane-thiols with various chain lengths (C 3 - C 24 ) and perfluorinated thiols to produce and cap metal nano particles. These involve reduction of metal salts at controlled pH and stabilization in aqueous or organic layer capping with thiol. Number of alkane-thiol have been used as capping agent to provide protecting properties for metal core (Pt, Pd, Au) and allow reasonable solubility in non polar organic solvents.
  • the reported polymers are poly vinylpyriOlidone, poly dithiofulvene, Dendrimers N-isopropylacylamide, chitosan, N-isopropylacrylamide polymer [PNIPA Am-Pfj. N-vinylisobutyramide has been used for encapsulating nanoparticles. These systems produce nano particles with large variation in nano sizes. Colloidal Platinum nano particles in the range of 10-30A were reported in ethanol water mixture in the presence of Poly (N-vinylisobutyramide) (PNVIBA).
  • Thiol functionalised platinum nano particles have been prepared in tetra-hydrofuoran as dispersing medium, lithium-triethyl borohydride as reducing agent and octadecanthiol as stabilizing agent.
  • the size of nano particles is around 3 nm.
  • this method involves the use of a large number of reagents besides this method is quite tedious.
  • Chitosan is a natural polymer which has been used for synthesis Pt, Pd nano particles using hydrazine or borohydride as reducing agent .
  • the diameter of the nano particles is around 3nm, however, synthesis involves the use number of number of reagents.
  • Regular Pt nano particles have been obtained by epitaxial deposition on NaCl surfaces supported by thin film of Ceria subject to hydrogen reduction up to 1073K.
  • a reference may be made to Take Fujimoto, etal ;Scripta Materialial 44,( 2001), P 2183-860.
  • the size of nano particles according to the above reference was found to be 10-15 nm. This process needs high cost equipment and vacuum of the order of 10 ⁇ 6 m bar.
  • Au nano particles have been prepared by sono- chemical reduction in aqueous medium where metal salt, surfactant, reducing agent are being used.
  • a multi wave ultra sound generator with a barium titanate oscillator has been used for sonif ⁇ cation.
  • the particle size is formed 2 to 10 nm.
  • a reference may be made to Chen. D.H. J. Collid interface Science Vol. 219, P 123-129, 155-166, 1999 in this regard.
  • Pt- Ni nano particles were prepared by hydrazine reduction of the metal salts by prolonged reaction at room temperature and microwave assisted reduction.
  • a reference may be made to O.P. Yadav etal, Colloids & Surfaces 221(2003), P 131-134. According to this reference, the average particle size is 2.9 to 5.8 nm.
  • the Pt, Pd nano particles have also been prepared by the reduction of metal ions with hydrazine or Borohydride in oil water micro emulsion and consisting of AOT or other surfactants, cyclohexane and aqueous solution of metal salt varying compositions. These nano particles are stable in micro-emulsion On breaking, the micro-emulsion nano particles start coagulating resulting in increase in size. The technique involves high cost of synthesis as well as a large number of reagents.
  • the main object of the present invention is synthesis of Pt and Pd metal nano particles of quantum well size around 3 nm in ethylene glycol medium, in which ethylene glcycol acts both as reducing and capping agent.
  • Another object of the present invention is that the nano particles do not aggloramate for long storage.
  • Another objective of the present invention is that nano particles do not get oxidized on centrifugation or during synthesis.
  • Another objective of the present invention is that nano particle should be free of impurities.
  • nano particles should work as better catalyst due to large surface area.
  • nano particles may get adsorbed on surface like silica, alumina or porous materials for their use in opto-electonic devices/catalysis.
  • nano particles of varying size can be prepared by varying the composition of the reaction mixture.
  • Yet another objective of the present invention is to synthesize the nano particles at much faster rate than the existing methods.
  • the present invention relates to a process for the synthesis of platinum and palladium quantum well size nano-particles in ethylene gylcol medium in which ethylene glycol acts as a combined dispersing medium, reducing agent and capping agent.
  • the present invention provides a process for preparing quantum well size nano particles of platinum / palladium having particle size in the range of 2 to 10 nm, said process comprising the steps of adding ethylene glycol / glycerol to platinum / palladium , salt solution, wherein ethylene glycol / glycerol acts as a combined dispersing medium, reducing agent and capping agent.
  • ethylene glycol / glycerol acts as a combined dispersing medium, reducing agent and capping agent.
  • a mixture of ethylene glycol / glycerol and platinum / palladium salt solution is heated to a temperature in the range of 105° to 140°C to obtain nano particles of platinum / palladium and a mother liquor.
  • the platinum salt solution used is an aqueous solution of H 2 PtCl 6 .6H 2 O.
  • the palladium salt solution used is an aqueous solution of PdCl 2 .
  • the concentration of platinum / palladium to ethylene glycol / glycerol is in the range of 0.025 to 1%.
  • the mixture of ethylene glycol / glycerol and platinum / palladium salt solution is mixed by stirring for a time period of about 30 about minutes and the pH of the solution is maintained between 4 to 6.
  • the mixture of ethylene glycol / glycerol and platinum / palladium salt solution is a clear transparent solution having an absorption peask for Pt(IV) in ethylene glycol medium at 265nm and at 221 nm for Pd(II).
  • the mixture of ethylene glycol / glycerol and platinum salt solution is heated to a temperature in the range of 130° to 140°C till the mixture initially turns brown and then black.
  • the mixture of ethylene glycol / glycerol and platinum salt solution is heated to a temperature in the range of 130° to 140°C for a time period in the range of 5 to 7 minutes.
  • the mixture of ethylene glycol / glycerol and palladium salt solution is heated to a temperature in the range of 105° to 110°C till the mixture initially turns brown and then black.
  • the mixture of ethylene glycol / glycerol and palladium salt solution is heated to a temperature in, the range of 105° to 110°C for a time period in the range of 5 to 7 minutes.
  • the nano particles of platinum is heated to a temperature in the range of 130° to 140°C for a time period in the range of 5 to 7 minutes.
  • the size of palladium nano particles thus obtained is in the range of 2 to 6nm for solution concentration in the range of 5 to 25 mg of palladium nano particles.
  • the present invention more particularly provides a process for preparing quantum well size nano particles of platinum / palladium having particle size in the range of 2 to 10 nm, said process comprising the steps of adding ethylene glycol / glycerol to platinum / palladium salt solution, wherein ethylene glycol / glycerol acts as a combined dispersing medium, reducing agent and capping agent and heating the same at a temperature in the range of
  • reaction mixture has been stirred for 30 minutes.
  • nano particles are formed at temperature 130°C -140°C for Pt and l05°C - 110°C for Pd by keeping it for 3-7 minutes.
  • the nano particles have been characterized by UV- Visible Spectroscopy, Transmission Electron Microscopy, Electron diffraction analysis, XRD & FTIR.
  • these nano particles have been separated from reacting mixture by centrifugation at a speed of 10,000 revolution per minute.
  • Pt & Pd nano particles have been dispersed in different solvent like ethylene glycol, glycerine & alcohols.
  • Pt & Pd nano particles have been coated on alumina and silica mesh size 230-400.
  • these nano particles has been used for catalytic use.
  • other polyhydric alcohols like glycerol and erythritrol has been used for synthesis of these nano particles.
  • Figure 1(a) represents the TEM micrograph of platinum solution containing 5 mg of platinum. As can be seen, the magnification is 3,90,000 times and the particle size was determined to be equal to about 4 nm.
  • Figure 1(b) represents the Electron diffraction pattern of nanoparticles obtained using platinum solution containing 5 mg of platinum.
  • Figure 2(a) represents the TEM micrograph of platinum solution containing 10 mg of platinum. As can be seen, the magnification is 5,20,000 times and the particle size was determined to be equal to about 3 nm.
  • Figure 2(b) represents the Electron diffraction pattern of nanoparticles obtained using platinum solution containing 10 mg of platinum.
  • Figure 3(a) represents the TEM micrograph of platinum solution containing 15 mg of platinum. As can be seen, the magnification is 5,20,000 times and the particle size was determined to be equal to about 3 nm.
  • Figure 3(b) represents the Electron diffraction pattern of nanoparticles obtained using platinum solution containing 15 mg of platinum.
  • Figure 4(a) represents the TEM micrograph of palladium solution containing 10 mg of palladium. As can be seen, the magnification is 3,90,000 times and the particle size was determined to be in the range of 2 to 6 nm.
  • Figure 4(b) represents the Electron diffraction pattern of nanoparticles obtained using palladium solution containing 10 mg of platinum.
  • reaction mixture was stirred for 30 minutes at room temperature. There is no immediate colour change at room temperature.
  • the reaction mixture was heated to 130°C - 140 °C for Pt and 105°C- 110°C for Pd for 3-7 minutes. On heating the colour of mixture first turn brown and finally black. The complete reduction was confirmed from the absorption spectra. It may be noted that no inert atmosphere has been used during the reaction.
  • the Inventors have also find that the method is quite general for production of nano particles of metals from their ions in higher oxidation state provided the sum of the Gibbs enegy for reduction of metal ions and Gibbs energy for the oxidation of glycol to glyoxal is negative.
  • the Inventors also note that a number of polyhydric alcohols like glycerol and eiythritrol are also suitable for production and capping of metal nano particles. Change in the absorption Spectral with Reduction UV & Visible spectral changes were recorded during the reduction of Pt & Pd ions in ethylene glycol.
  • the spectral of the solution consists of a major peak at 265 nm attributed to Pt Cl 6 "2 ion or 221 nm PdCl 2 .
  • the peak at 265 nm & 221 nm disappear indicating the complete formation of Pt (0) & Pd (0)
  • the colour of the solution also turns black.
  • the Pt - ethyleneglycol or Pd- ethylene glycol nano particles are highly stable and can be dispersed in ethylene glycol, glycerine and alcohols after the removal of excess ethyleneglycol.
  • Typical electron micrographs of ethylene glycol Pt, ethylene glycol Pd colloids are shown in figure.
  • the particle size and size distribution of colloidal Pt & Pd nanoparticles derived from TEM measurement are also shown in f ⁇ gure(Figla-4a).
  • TEM image reveals that well dispersed ethylene glycol — Pt nano particles lie between 3 to 4 nm for 5 to 15 mg of Pt concentration (fig la-3a). The Pd nano particles are found to be higher around 2-6 nm.
  • Platinum system - detail study of diffraction pattern of the corresponding area reveals the formation of single phase cubic platinum nano particles (hid) planes with strong deflection (100) and moderate (200).
  • Pd (220) is a strong crystalline cubic plan with weak
  • Alumina or silica in the ratio 100:1 Al 2 O :Pt or Pd is added in Pt(0), Pd (0) colloidal solution.
  • the dispersion mixture is stirred for half an hour and kept for 24 hours so that metal particles get adsorbed on the surface on the alumina or silica surface.
  • Pt or Pd adsorbed nano particles are separated after centrifugation and calcined at 500°C for one hour. After cooling these materials are stored in vacuum desiccators. XRD pattern showed the coated Pt or Pd nano particles on alumina and silica.
  • Example No. 1 Experiments were carried out to prepare Platinum and palladium nano particles using concentration of 5,10andl5 mg of Pt and 10,15 and20 mg of Pd in ethylene glycol medium. It has been observed that nano particles are formed of uniform size under controlled conditions of temperature. The size of pt nanoparticles lies between 3 to4 nm where as in case of pd it lies between 2 to 6nm.
  • Example No. 2 UV & Visible Spectroscopy was carried out and that there is no absorption peak at 265 nm for Pt (0) and 221 nm Pd (0), which was observed in ethylene glycol for metal chloride before the reduction process, starts.
  • Example No. 3 Transmission and electron diffraction studies were earned out which confirm the formation of nano particles of Quantum size. Electron diffraction studies indicate that the nano particles are monodispersive, single-phase cubic.
  • Example No. 4 The Inventors have separated the Pt & Pd nano particle from ethylene glycol by centifiguration and dispersed the same in different solvents. The Inventors have coated these nano particles on silica & alumina.
  • Example No. 5 The Inventors have tried to use these nano particles as catalyst for conversion of CO into carbon dioxide and other organic reactions and found that their results are far better than those obtained in conventional processes.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metallurgy (AREA)
  • Nanotechnology (AREA)
  • Physics & Mathematics (AREA)
  • Composite Materials (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Catalysts (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

L'invention concerne un procédé permettant de préparer des nanoparticules de platine/palladium de la taille d'un puits quantique comprise entre 2 et 10 nm. Ledit procédé consiste à ajouter un éthylène glycol/glycérol à une solution de sels de platine/palladium, l'éthylène glycol/glycérol agissant comme un milieu de dispersion combiné, un agent de réduction et un agent de coiffage; et à les chauffer à une température comprise entre 100° et 140 °C afin d'obtenir des nanoparticules de platine/palladium.
PCT/IN2004/000072 2004-03-29 2004-03-29 Synthese de nanoparticules de platine et de palladium de la taille d'un puits quantique WO2005092784A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/IN2004/000072 WO2005092784A1 (fr) 2004-03-29 2004-03-29 Synthese de nanoparticules de platine et de palladium de la taille d'un puits quantique
CNA2004800428894A CN1946628A (zh) 2004-03-29 2004-03-29 量子阱大小的铂和钯纳米颗粒的合成

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IN2004/000072 WO2005092784A1 (fr) 2004-03-29 2004-03-29 Synthese de nanoparticules de platine et de palladium de la taille d'un puits quantique

Publications (1)

Publication Number Publication Date
WO2005092784A1 true WO2005092784A1 (fr) 2005-10-06

Family

ID=34957307

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2004/000072 WO2005092784A1 (fr) 2004-03-29 2004-03-29 Synthese de nanoparticules de platine et de palladium de la taille d'un puits quantique

Country Status (2)

Country Link
CN (1) CN1946628A (fr)
WO (1) WO2005092784A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7829496B2 (en) * 2005-12-28 2010-11-09 Industrial Technology Research Institute Process for preparing platinum based electrode catalyst for use in direct methanol fuel cell
KR20160071198A (ko) 2014-12-11 2016-06-21 서강대학교산학협력단 팔라듐 나노 입자의 제조방법
CN113953526A (zh) * 2021-10-25 2022-01-21 昆明理工大学 一种超细钯粉的制备方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102205421A (zh) * 2010-03-31 2011-10-05 中国科学院福建物质结构研究所 水热法制备金、银纳米颗粒
CN108855240B (zh) * 2018-06-25 2020-11-20 厦门大学 一种利用甘油保护纳米铂颗粒催化活性的方法
CN115446303B (zh) * 2022-09-16 2024-01-16 中国人民解放军国防科技大学 一种铂量子点及其简易制备方法和应用

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6074979A (en) * 1997-05-23 2000-06-13 Celanese Gmbh Polybetaine-stabilized, palladium-containing nanoparticles, a process for preparing them and also catalysts prepared from them for producing vinyl acetate
US20030104936A1 (en) * 2001-12-03 2003-06-05 3M Innovative Properties Company Supported nanoparticle catalyst
US20040025635A1 (en) * 2001-04-02 2004-02-12 Kurihara Lynn K. Processing of nanocrystalline metallic powders and coatings using the polyol process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6074979A (en) * 1997-05-23 2000-06-13 Celanese Gmbh Polybetaine-stabilized, palladium-containing nanoparticles, a process for preparing them and also catalysts prepared from them for producing vinyl acetate
US20040025635A1 (en) * 2001-04-02 2004-02-12 Kurihara Lynn K. Processing of nanocrystalline metallic powders and coatings using the polyol process
US20030104936A1 (en) * 2001-12-03 2003-06-05 3M Innovative Properties Company Supported nanoparticle catalyst

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BONET F ET AL: "Synthesis of monodisperse Au, Pt, Pd, Ru and Ir nanoparticles in ethylene glycol", NANOSTRUCTURED MATERIALS, ELSEVIER, NEW YORK, NY, US, vol. 11, no. 8, November 1999 (1999-11-01), pages 1277 - 1284, XP004203105, ISSN: 0965-9773 *
TEKAIA-ELHSISSEN K ET AL: "Finely divided platinum-gold alloy powders prepared in ethylene glycol", JOURNAL OF ALLOYS AND COMPOUNDS, ELSEVIER SEQUOIA, LAUSANNE, CH, vol. 292, no. 1-2, 15 November 1999 (1999-11-15), pages 96 - 99, XP004364544, ISSN: 0925-8388 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7829496B2 (en) * 2005-12-28 2010-11-09 Industrial Technology Research Institute Process for preparing platinum based electrode catalyst for use in direct methanol fuel cell
US8012905B2 (en) 2005-12-28 2011-09-06 Industrial Technology Research Institute Process for preparing platinum based electrode catalyst for use in direct methanol fuel cell
KR20160071198A (ko) 2014-12-11 2016-06-21 서강대학교산학협력단 팔라듐 나노 입자의 제조방법
CN113953526A (zh) * 2021-10-25 2022-01-21 昆明理工大学 一种超细钯粉的制备方法
CN113953526B (zh) * 2021-10-25 2024-03-15 昆明理工大学 一种超细钯粉的制备方法

Also Published As

Publication number Publication date
CN1946628A (zh) 2007-04-11

Similar Documents

Publication Publication Date Title
Rej et al. Well-defined Cu 2 O photocatalysts for solar fuels and chemicals
Saliba et al. Crystal growth of ZIF-8, ZIF-67, and their mixed-metal derivatives
Wang et al. Review of the progress in preparing nano TiO2: An important environmental engineering material
Bang et al. Applications of ultrasound to the synthesis of nanostructured materials
Rioux et al. Monodisperse platinum nanoparticles of well-defined shape: synthesis, characterization, catalytic properties and future prospects
Zhang et al. Toward rationally designing surface structures of micro-and nanocrystallites: role of supersaturation
EP2254692B1 (fr) Procédé pour préparer des dispersions de nanoparticules de métaux précieux et pour isoler de telles nanoparticules desdites dispersions
US8048192B2 (en) Method of manufacturing nanoparticles
Peng et al. Morphology control of nanoscale PbS particles in a polyol process
Manzoli et al. Brookite, a sometimes under evaluated TiO 2 polymorph
Xu et al. Understanding the stability and reactivity of ultrathin tellurium nanowires in solution: An emerging platform for chemical transformation and material design
US20150238935A1 (en) METHOD FOR SYNTHESIZING SILVER NANOPARTICLES ON TiO2 USING HYBRID POLYMERS
Li et al. Synthesis of octahedral and cubic Cu 2 O microcrystals in sub-and super-critical methanol and their photocatalytic performance
Hu et al. Mesoporous Colloidal Superparticles of Platinum‐Group Nanocrystals with Surfactant‐Free Surfaces and Enhanced Heterogeneous Catalysis
CN112452315A (zh) 一种高温抗烧结催化剂的应用
Cihlar et al. Influence of LA/Ti molar ratio on the complex synthesis of anatase/brookite nanoparticles and their hydrogen production
WO2005092784A1 (fr) Synthese de nanoparticules de platine et de palladium de la taille d'un puits quantique
Jia et al. Selective growth of TiO 2 beads on Ag nanowires and their photocatalytic performance
KR101512359B1 (ko) 콜로이드 산화세륨 제조방법
CN111470529A (zh) 形貌可调的钛酸锶纳米材料的制备方法
Behboudnia et al. Facile and room temperature preparation and characterization of PbS nanoparticles in aqueous [EMIM][EtSO4] ionic liquid using ultrasonic irradiation
Liu et al. Nanoparticulate materials and core/shell structures derived from wet chemistry methods
KR100860610B1 (ko) 퀀텀 웰 크기의 백금 및 팔라듐 나노 입자의 합성
Lo et al. Polyol synthesis of polycrystalline cuprous oxide nanoribbons and their growth chemistry
EP2590765B1 (fr) Nanoparticules métalliques

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200480042889.4

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Ref document number: DE

WWE Wipo information: entry into national phase

Ref document number: 1020067022724

Country of ref document: KR

122 Ep: pct application non-entry in european phase
DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)