skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Method for forming gold-containing catalyst with porous structure

Abstract

A method for forming a gold-containing catalyst with porous structure according to one embodiment of the present invention includes producing a starting alloy by melting together of gold and at least one less noble metal that is selected from the group consisting of silver, copper, rhodium, palladium, and platinum; and a dealloying step comprising at least partial removal of the less noble metal by dissolving the at least one less noble metal out of the starting alloy. Additional methods and products thereof are also presented.

Inventors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1149685
Patent Number(s):
8,785,346
Application Number:
12/480,545
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA); Universitaet Bremen (Bremen, DE); Biener, Monica M. (San Leandro, CA) LLNL
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Patent File Date: 2009 Jun 08
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Biener, Juergen, Hamza, Alex V, Baeumer, Marcus, Schulz, Christian, Jurgens, Birte, and Biener, Monika M. Method for forming gold-containing catalyst with porous structure. United States: N. p., 2014. Web.
Biener, Juergen, Hamza, Alex V, Baeumer, Marcus, Schulz, Christian, Jurgens, Birte, & Biener, Monika M. Method for forming gold-containing catalyst with porous structure. United States.
Biener, Juergen, Hamza, Alex V, Baeumer, Marcus, Schulz, Christian, Jurgens, Birte, and Biener, Monika M. Tue . "Method for forming gold-containing catalyst with porous structure". United States. doi:. https://www.osti.gov/servlets/purl/1149685.
@article{osti_1149685,
title = {Method for forming gold-containing catalyst with porous structure},
author = {Biener, Juergen and Hamza, Alex V and Baeumer, Marcus and Schulz, Christian and Jurgens, Birte and Biener, Monika M.},
abstractNote = {A method for forming a gold-containing catalyst with porous structure according to one embodiment of the present invention includes producing a starting alloy by melting together of gold and at least one less noble metal that is selected from the group consisting of silver, copper, rhodium, palladium, and platinum; and a dealloying step comprising at least partial removal of the less noble metal by dissolving the at least one less noble metal out of the starting alloy. Additional methods and products thereof are also presented.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 22 00:00:00 EDT 2014},
month = {Tue Jul 22 00:00:00 EDT 2014}
}

Patent:

Save / Share:
  • The present invention is based, in part, on a method for combining a mixture of hydroxide and hydride functional siloxanes to form a polysiloxane polymer foam, that leaves no residue (zero char yield) upon thermal decomposition, with ceramic and/or metal powders and appropriate catalysts to produce porous foam structures having compositions, densities, porosities and structures not previously attainable. The siloxanes are mixed with the ceramic and/or metal powder, wherein the powder has a particle size of about 400 {mu}m or less, a catalyst is added causing the siloxanes to foam and crosslink, thereby forming a polysiloxane polymer foam having themore » metal or ceramic powder dispersed therein. The polymer foam is heated to thermally decompose the polymer foam and sinter the powder particles together. Because the system is completely nonaqueous, this method further provides for incorporating reactive metals such as magnesium and aluminum, which can be further processed, into the foam structure.« less
  • The present invention is based, in part, on a method for combining a mixture of hydroxide and hydride functional siloxanes to form a polysiloxane polymer foam, that leaves no residue (zero char yield) upon thermal decomposition, with ceramic and/or metal powders and appropriate catalysts to produce porous foam structures having compositions, densities, porosities and structures not previously attainable. The siloxanes are mixed with the ceramic and/or metal powder, wherein the powder has a particle size of about 400 .mu.m or less, a catalyst is added causing the siloxanes to foam and crosslink, thereby forming a polysiloxane polymer foam having themore » metal or ceramic powder dispersed therein. The polymer foam is heated to thermally decompose the polymer foam and sinter the powder particles together. Because the system is completely nonaqueous, this method further provides for incorporating reactive metals such as magnesium and aluminum, which can be further processed, into the foam structure.« less
  • Structures, catalysts, and reactors suitable for use for a variety of applications, including gas-to-liquid and coal-to-liquid processes and methods of forming the structures, catalysts, and reactors are disclosed. The catalyst material can be deposited onto an inner wall of a microtubular reactor and/or onto porous tungsten support structures using atomic layer deposition techniques.
  • A method is provided for preparing a porous catalyst carrier having a pore volume of at least 0.5 cc/g, a content of micropores in which the pore diameter is between 80 and 150 A which constitutes at least 70% of the pore volume and a content of macropores which constitutes less than 3% of the pore volume. In the method, a powdered solid comprised of predominantly alpha alumina monohydrate and sized in the range below 500 microns is treated with a particular amount of a monobasic acid. The acid in the resulting mixture is then at least partially neutralized bymore » admixing with a nitrogen base such as aqueous ammonia. The treated and neutralized feed is converted into a catalyst carrier by shaping as desired, drying, and calcining. Further aspects of the invention are a hydrodesulfurization catalyst prepared using the present carrier and a hydrodesulfurization process for metals -contaminated hydrocarbon feeds using the catalyst.« less
  • A method is described of electrolyzing water to produce oxygen and hydrogen in an electrochemical system in cells that contain aqueous potassium hydroxide electrolyte, an anode and a cathode. The method consists of: (a) maintaining aqueous electrolyte in contact with the cathode and the anode; (b) maintaining a supply of water at the cathode; (c) maintaining a supply of hydroxyl ions at the anode; and (d) passing a direct electric current through the system causing reduction of the water to hydrogen at the cathode and oxidation of the hydroxyl ion to oxygen at the anode; wherein the improvement comprises utilizingmore » as the anode a NiCo/sub 2/O/sub 4/ catalyzed electrically conductive substrate made by soaking the substrate in a solution of nickel nitrate hexahydrate and cobalt II nitrate hexahydrate and then sintering the impregnated substrate the electrolysis requiring an anode voltage of less than about 1470 millivolts at 100 milliamperes per square centimeter of anode area.« less