Title: Synthesis of nanoparticles using ethanol

Abstract

The present disclosure relates to methods for producing nanoparticles. The nanoparticles may be made using ethanol as the solvent and the reductant to fabricate noble-metal nanoparticles with a narrow particle size distributions, and to coat a thin metal shell on other metal cores. With or without carbon supports, particle size is controlled by fine-tuning the reduction power of ethanol, by adjusting the temperature, and by adding an alkaline solution during syntheses. The thickness of the added or coated metal shell can be varied easily from sub-monolayer to multiple layers in a seed-mediated growth process. The entire synthesis of designed core-shell catalysts can be completed using metal salts as the precursors with more than 98% yield; and, substantially no cleaning processes are necessary apart from simple rinsing. Accordingly, this method is considered to be a "green" chemistry method.

Inventors:

Wang, Jia Xu

Issue Date:

Tue Jan 24 00:00:00 EST 2017

Research Org.:

Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1340581

Patent Number(s):

9550170

Application Number:

13/860,316

Assignee:

Brookhaven Sciecne Associates, LLC (Upton, NY)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J13/02 - Making microcapsules or microballoons {
B01J23/44 - Palladium
B01J23/462 - {Ruthenium}

B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER

B22F2009/245 - {Reduction reaction in an Ionic Liquid [IL]}
B22F2301/25 - Noble metals, i.e. Ag Au, Ir, Os, Pd, Pt, Rh, Ru
B22F2998/10 - Processes characterised by the sequence of their steps
B22F9/18 - with reduction of metal compounds
B22F9/24 - starting from liquid metal compounds, e.g. solutions

B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

B32B15/02 - {Layer formed of wires, e.g. mesh}

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

B82Y30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
B82Y40/00 - Manufacture or treatment of nanostructures

C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25B - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS

C25B1/04 - by electrolysis of water
C25B11/04 - characterised by the material

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M4/926 - {on carbon or graphite}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/36 - Hydrogen production from non-carbon containing sources
Y02E60/50 - Fuel cells

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10S977/777 - Metallic powder or flake
Y10S977/892 - Liquid phase deposition
Y10S977/896 - Chemical synthesis, e.g. chemical bonding or breaking
Y10S977/948 - Energy storage/generating using nanostructure, e.g. fuel cell, battery

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DOE Contract Number:  

AC02-98CH10886

Resource Type:

Patent

Resource Relation:

Patent File Date: 2013 Apr 10

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE