BRPI0605696E2 - process of functionalization of carbon sources by the formation on their surface of oxygenated functional groups for application as support of electrocatalysts in cells. - Google Patents

process of functionalization of carbon sources by the formation on their surface of oxygenated functional groups for application as support of electrocatalysts in cells.

Info

Publication number
BRPI0605696E2
BRPI0605696E2 BRC10605696-2A BRPI0605696A BRPI0605696E2 BR PI0605696 E2 BRPI0605696 E2 BR PI0605696E2 BR PI0605696 A BRPI0605696 A BR PI0605696A BR PI0605696 E2 BRPI0605696 E2 BR PI0605696E2
Authority
BR
Brazil
Prior art keywords
carbon source
functionalization
support
groups
nanoparticles
Prior art date
Application number
BRC10605696-2A
Other languages
Portuguese (pt)
Inventor
Carmo Marcelo Do
Poco Joao Guilherme Rocha
Marcelo Linardi
Original Assignee
Inst Pesquisas Tech
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 Inst Pesquisas Tech filed Critical Inst Pesquisas Tech
Priority to BRC10605696-2A priority Critical patent/BRPI0605696E2/en
Priority to PCT/BR2007/000354 priority patent/WO2008074113A1/en
Publication of BRPI0605696A publication Critical patent/BRPI0605696A/en
Publication of BRPI0605696E2 publication Critical patent/BRPI0605696E2/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/92—Metals of platinum group
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/92—Metals of platinum group
    • H01M4/925—Metals of platinum group supported on carriers, e.g. powder carriers
    • H01M4/926—Metals of platinum group supported on carriers, e.g. powder carriers on carbon or graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

PROCESSO DE FUNCIONALIZAÇçO DE FONTES DE CARBONO PELA FORMAÇçO EM SUA SUPERFICIE DE GRUPOS FUNCIONAIS OXIGENADOS PARA APLICAÇçO COMO SUPORTE DE ELETROCATALISADORES EM CÉLULAS À COMBUSTÍVEL DO TIPO MEMBRANA TROCADORA DE PRàTONS. Pertencente ao setor de eletrocatalisadores para células a combustível do tipo eletrólito polimérico sólido, diz respeito a uma forma de funcionalização da superfície micro nanoscópica da fonte de carbono por meio de reações químicas, realizando o crescimento de grupos carboxilicos - COOH e/ou grupos álcoois -OH na superfície da fonte de carbono, seguida de filtragem, lavagem do material para eliminação do excesso de agente oxidante ou reagido com impurezas, e finalmente secagem. Em seguida, se realiza a ancoragem das nano partículas de metais e ligas metálicas, do tipo Pt e PtRu e outras, utilizando qualquer método do estado da técnica para preparação dos catalisadores dispersos. A invenção elimina impurezas da superfície da fonte de carbono e, consequentemente, melhora a condutividade elétrica do material e contribui também para uma distribuição mais homogênea das nanoparticulas metálicas no suporte devido à formação de grupos do tipo carboxilas, hidroxilas, cetonas e éteres na superfície da fonte de carbono, os quais, por efeito alostérico, fazem com que as nanopartículas se depositem de uma forma mais homogênea em sua superfície, melhora a atividade catalítica do material, e também diminui a probabilidade de ocorrer sinterização das nanoparticulas, ou seja, diminuindo o envelhecimento do catalisador.CARBON SOURCE FUNCTIONALIZATION PROCESS FOR TRAINING THE SURFACE OF OXYGENIZED FUNCTIONAL GROUPS FOR APPLICATION AS SUPPORT FOR ELECTROCATALIZERS IN FUEL TYPE MEMBRANE TYPE CELLS. Belonging to the solid polymer electrolyte fuel cell electrocatalyst sector, it concerns a form of functionalization of the micro nanoscopic surface of the carbon source through chemical reactions, performing the growth of carboxylic groups - COOH and / or alcohol groups - OH on the surface of the carbon source, followed by filtration, washing of the material to remove excess oxidizing agent or reacted with impurities, and finally drying. Next, the Pt and PtRu type metals and alloys nanoparticles are anchored using any state of the art method for preparing the dispersed catalysts. The invention eliminates impurities from the surface of the carbon source and, consequently, improves the electrical conductivity of the material and also contributes to a more homogeneous distribution of the metal nanoparticles in the support due to the formation of carboxyl, hydroxyl, ketone and ether type groups on the surface of the material. carbon source which, by allosteric effect, make the nanoparticles deposit more homogeneously on their surface, improve the catalytic activity of the material, and also decreases the probability of nanoparticle sintering, that is, decreasing the catalyst aging.

BRC10605696-2A 2006-12-19 2006-12-19 process of functionalization of carbon sources by the formation on their surface of oxygenated functional groups for application as support of electrocatalysts in cells. BRPI0605696E2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BRC10605696-2A BRPI0605696E2 (en) 2006-12-19 2006-12-19 process of functionalization of carbon sources by the formation on their surface of oxygenated functional groups for application as support of electrocatalysts in cells.
PCT/BR2007/000354 WO2008074113A1 (en) 2006-12-19 2007-12-19 Process of carbons functionalization by the growth of polymeric chains with ion exchange properties for polymer electrolyte fuel cell applications

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BRC10605696-2A BRPI0605696E2 (en) 2006-12-19 2006-12-19 process of functionalization of carbon sources by the formation on their surface of oxygenated functional groups for application as support of electrocatalysts in cells.

Publications (2)

Publication Number Publication Date
BRPI0605696A BRPI0605696A (en) 2008-08-12
BRPI0605696E2 true BRPI0605696E2 (en) 2008-11-25

Family

ID=39535913

Family Applications (1)

Application Number Title Priority Date Filing Date
BRC10605696-2A BRPI0605696E2 (en) 2006-12-19 2006-12-19 process of functionalization of carbon sources by the formation on their surface of oxygenated functional groups for application as support of electrocatalysts in cells.

Country Status (2)

Country Link
BR (1) BRPI0605696E2 (en)
WO (1) WO2008074113A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102719075A (en) * 2012-07-03 2012-10-10 上海锦湖日丽塑料有限公司 Method for preparing weather resistant polycarbonate composition
CN114914463B (en) * 2021-02-08 2023-11-07 中国科学院大连化学物理研究所 High-load high-dispersion platinum-carbon catalyst and preparation method of amino ligand thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58142942A (en) * 1982-02-19 1983-08-25 Central Glass Co Ltd Preparation of polymer-coated inorganic substance and molded article
JPS63191864A (en) * 1987-02-04 1988-08-09 Fuji Xerox Co Ltd Production of pigment having treated surface
CA2000649A1 (en) * 1988-10-17 1990-04-17 Tsuyoshi Inoue Electrocoating composition
US6426134B1 (en) * 1998-06-30 2002-07-30 E. I. Du Pont De Nemours And Company Single-wall carbon nanotube-polymer composites
DE10038124B4 (en) * 2000-08-04 2006-05-11 Infineon Technologies Ag Use of a multi-walled nanotube on a substrate and as an electronic component
JP2005342937A (en) * 2004-06-01 2005-12-15 National Printing Bureau Roller for printing machine and its manufacturing method

Also Published As

Publication number Publication date
WO2008074113A1 (en) 2008-06-26
BRPI0605696A (en) 2008-08-12

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