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Selective oxidation of carbon monoxide relative to hydrogen using catalytically active gold

A catalytic activity, hydrogen technology, applied in the field of gold-based nanostructured catalyst system, can solve problems such as ambiguity

Inactive Publication Date: 2009-04-29
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, although gold on titania has been tested as a PROX catalyst, there is little hope of commercial success for this application.

Method used

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  • Selective oxidation of carbon monoxide relative to hydrogen using catalytically active gold
  • Selective oxidation of carbon monoxide relative to hydrogen using catalytically active gold
  • Selective oxidation of carbon monoxide relative to hydrogen using catalytically active gold

Examples

Experimental program
Comparison scheme
Effect test

example 6-13 and comparative example 4

[0296] Examples 6-13 and Comparative Example 4 Derived from M on nanoparticulate titanium dioxide 2+ Cationic gold Genus-oxygen domain

[0297] Table 7

[0298]

[0299] (Ca(CH 3 CO 2 ) 2 ·H 2 O: Obtained from MP Biomedicals, Aurora, Illinois; Co (CH 3 CO 2 ) 2 ·4H 2 O: Available from Aldrich Chemical Company, Milwaukee, Wisconsin; Mn (CH 3 CO 2 ) 2 ·4H 2 O: Obtained from Fisher Scientific, Fair Lawn, New Jersey; Zn (CH 3 CO 2 ) 2 ·2H 2 O: Obtained from Mallinckrodt Co., Ltd., Paris, Kentucky; TiO 2 : Obtained from Hombikat UV100, Sachtleben Chemie GmbH, Duisburg, Germany)

[0300] Prepare solution A and solution B by mixing the reagents shown in the table above. Stir the solution until the solids are completely dissolved. The TiO shown in the above table was mixed with an IKA T18 high-energy stirrer (from IKA Works Co., Ltd., Wilmington, NC) equipped with a 19mm dispersing head 2 Dispersion components to prepare nanoparticle titanium dioxide dispersions. In about 30 minut...

example 14-16

[0315] Example 14-16 Containing Fe by hydrolysis and oxidation 2+ Precursor to form nano-particle titanium dioxide on Iron-oxygen domain

[0316] Table 11

[0317]

[0318] (Ferrous sulfate heptahydrate: available from J.T. Baker, Phillipsburg, New Jersey; H 2 O 2 : Obtained from Mallinckrodt Ltd., Phillipsburg, New Jersey)

[0319] For Examples 14-16, the hydrolysis conditions and reagent dosages are listed in Table 11. In each case, 65.0g Hombikat UV100 titanium dioxide (available from SachtlebenChemie GmbH, Duisburg, Germany) was mixed in 500g with an IKA T18 high-energy stirrer (available from IKA Works Co., Ltd., Wilmington, NC) equipped with a 19mm dispersing head. Prepare nano-particle titanium dioxide dispersion in ionized water. In about 40 minutes, solution A and solution B were added dropwise to the stirred titanium dioxide dispersion. Adjust the dropping rate of the two solutions, and slowly add the two solutions dropwise at the same rate. In Examples 14 and 15...

example 17-20

[0334] Example 17-20 Mixed metal-oxygen domains on nanoparticulate titanium dioxide .

[0335] Table 15

[0336]

[0337] (Ferrous sulfate heptahydrate: available from J.T. Baker, Phillipsburg, New Jersey; H 2 O 2 : Obtained from Mallinckrodt Co., Ltd., Phillipsburg, New Jersey; Zn (CH 3 CO 2 ) 2 ·2H 2 O: Obtained from Mallinckrodt Co., Ltd., Paris, Kentucky; Ca(CH 3 CO 2 ) 2 ·H 2 O: Obtained from MPBiomedicals, Aurora, Illinois; MgCl 2 ·6H 2 O: Available from EMD Chemicals Co., Gibbstown, New Jersey)

[0338] By dissolving the required amount of metal compound in water (see Table 15), a solution named "Solution A" providing iron and a second metal cation was prepared. A sodium hydroxide solution ("Solution B") was prepared by dissolving the required amount of sodium hydroxide in 250 g of deionized water (see Table 15). Prepared by mixing 65.0 g Hombikat UV100 titanium dioxide (from SachtlebenChemie GmbH, Duisburg, Germany) in 500 g of deionized water with an IKA T18 high-ener...

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Abstract

The present invention provides technology for controlling, or tuning, the catalytic activity of gold provided upon nanoporous supports such as those derived from nanoparticulate, crystalline titania. In some aspects of practice, the surface of nanoparticulate media incorporated into a catalyst system of the present invention is provided with chemical modifications of the surface that dramatically suppress the ability of the resultant catalyst system to oxidize hydrogen. Yet, the system still readily oxidizes CO. In other words, by selecting and / or altering the nanoparticulate surface via the principles of the present invention, PROX catalysts are readily made from materials including catalytically active gold and nanoparticulate media. Additionally, the nanoparticulate support also may be optionally thermally treated to further enhance selectivity for CO oxidation with respect to hydrogen. Such thermal treatments may occur before or after chemical modification, but desirably occur prior to depositing catalytically active gold onto the support incorporating the nanoparticles.

Description

[0001] Priority statement [0002] This non-provisional patent application claims the priority of the U.S. provisional patent application serial number 60 / 773,866, which was filed by Brey on February 15, 2006 under the title SELECTIVE OXIDATION OF CARBON MONOXIDE RELATIVE TO HYDROGENUSING CATALYTICALLY ACTIVE GOLD (Selective oxidation of carbon monoxide relative to hydrogen when using catalytically active gold), wherein the provisional patent application is incorporated herein by reference in its entirety. Technical field [0003] The present invention relates to a gold-based nanostructured catalyst system, which can be used to selectively oxidize carbon monoxide in the presence of hydrogen. The resulting purified stream can be used as a feedstock for CO-sensitive devices (such as fuel cells, etc.). Background technique [0004] Electrochemical cells (including proton exchange membrane fuel cells, sensors, electrolyzers, and electrochemical reactors) are known in the art. General...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04
CPCB01J35/006B01J23/52C23C14/223Y02E60/50B01J35/0013C23C14/185B01J37/0238H01M2008/1095C01B3/583B01J23/66C01B2203/044H01M8/0668C01B2203/047B01J35/1061B01J35/647H01M8/06H01M8/04B82Y30/00B01J35/23B01J35/393
Inventor 托马斯·E·伍德拉里·A·布雷吉纳·M·布切拉托盖扎亨·D·达姆蒂杜安·D·范斯勒马尔文·E·琼斯马克·E·米勒
Owner 3M INNOVATIVE PROPERTIES CO
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