Title: Carbon supports for oxygen reduction catalysts

Abstract

The invention provides a method of making a electrocatalyst from waste tires. The method comprises the steps of providing rubber pieces; optionally contacting the rubber pieces with a sulfonation bath to produce sulfonated rubber; pyrolyzing the rubber to produce tire-derived carbon composite comprising carbon black, wherein the pyrolyzing comprises heating to at least 200° C.-2400° C.; activating the tire-derived carbon composite by contacting the tire-derived carbon composite with an alkali anion compound to provide activated tire-derived carbon supports; and loading the activated carbon-based supports with platinum cubes. In another embodiment, the tire-derived carbon composite is activated by annealing in a carbon dioxide atmosphere.

Inventors:

Naskar, Amit K.; Paranthaman, Mariappan; Yang, Xuan; Xia, Younan; Hood, Zachary D.; Li, Yunchao

Issue Date:

2022-07-12

Research Org.:

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1924886

Patent Number(s):

11384219

Application Number:

15/961,978

Assignee:

UT-Battelle, LLC (Oak Ridge, TN); University of Tennessee Research Foundation (Knoxville, TN)

Patent Classifications (CPCs):

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP

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C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2002/72 - by d-values or two theta-values, e.g. as X-ray diagram
C01P2002/85 - by XPS, EDX or EDAX data
C01P2004/03 - obtained by SEM
C01P2004/04 - obtained by TEM, STEM, STM or AFM
C01P2006/12 - Surface area
C01P2006/14 - Pore volume
C01P2006/16 - Pore diameter
C01P2006/37 - Stability against thermal decomposition
C01P2006/40 - Electric properties

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP

C08J11/12 - by dry-heat treatment only
C08J11/28 - by treatment with organic compounds containing nitrogen, sulfur or phosphorus
C08J2317/00 - Characterised by the use of reclaimed rubber

C - CHEMISTRY C09 - DYES C09C - TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

C09C1/482 - {Preparation from used rubber products, e.g. tyres

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}

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DOE Contract Number:  

AC05-00OR22725

Resource Type:

Patent

Resource Relation:

Patent File Date: 04/25/2018

Country of Publication:

United States

Language:

English