Surface modified oxygen reduction electrochemical catalysts
AssigneesToyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha
InventorKeiichi Okubo
Life of this patent
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Abstract
A catalyst includes a metal on carbon (Me/C) particle with a surface modified with a plurality of immobilized planar six-membered benzene-like rings having at least three functional groups (R1-R3), and up to seven functional groups (R4-R7). The plurality of immobilized planar six-membered benzene-like rings can be a plurality of immobilized triazine rings. The R1 functional group is bonded to or provides a bond with the Me/C particle and is selected from O, COO, NH, NR4, S, an alkylamino group having 1 to 10 carbon atoms, an alkyl group having 1 to 10 carbon atoms, and a perfluoro alkyl group having 1 to 10 carbon atoms.
Claims20
A catalyst comprising:
- a metal containing particle on a carbon support (Me/C particle), the Me/C particle having an oxygen reduction catalytic activity;
- and
- a surface of the Me/C particle modified with a plurality of immobilized triazine rings having at least one halogen functional group selected from R1, R2, and R3, and where R1 is bonded to the carbon support and selected from the group consisting of O, COO, NH, NR4, S, an alkylamino group having 1 to 10 carbon atoms, an alkyl group having 1 to 10 carbon atoms, and a perfluoro alkyl group having 1 to 10 carbon atoms, and where R4 is a functional group.
A catalyst comprising:
- a metal containing particle on a carbon support (Me/C particle), the Me/C particle having an oxygen reduction catalytic activity;
- a surface of the Me/C particle modified with a plurality of immobilized triazine rings having at least three functional groups R1, R2, and R3, with at least one of R1, R2, and R3 being a halogen functional group;
- R1 is bonded to the Me/C particle and selected from the group consisting of O, COO, NH, NR4, S, an alkylamino group having 1 to 10 carbon atoms, an alkyl group having 1 to 10 carbon atoms, and a perfluoro alkyl group having 1 to 10 carbon atoms, and where R4 is a functional group;
- and
- R2 and R3 are independently selected from the group consisting of NH2, NR4H, NR4R5, H, OH, F, Cl, Br, I, SH, an alkylamino group having 1 to 10 carbon atoms, an alkyl group having 1 to 10 carbon atoms, and a perfluoro alkyl group having 1 to 10 carbon atoms, and where R5 is a functional group.
A catalyst comprising:
- a platinum containing particle on a carbon support (Pt/C particle), the Pt/C particle having an oxygen reduction catalytic activity;
- a surface of the Pt/C particle modified with a plurality of immobilized triazine rings having at least one a halogen functional group and a chemical structure selected from at least one of:
- R1 is bonded to the Pt/C particle and selected from the group consisting of O, COO, NH, NR4, S, an alkylamino group having 1 to 10 carbon atoms, an alkyl group having 1 to 10 carbon atoms, and a perfluoro alkyl group having 1 to 10 carbon atoms;
- and
- R2 and R3 are independently selected from the group consisting of NH2, NR4H, NR4R5, H, OH, F, Cl, Br, I, SH, an alkylamino group having 1 to 10 carbon atoms, an alkyl group
- having 1 to 10 carbon atoms, and a perfluoro alkyl group having 1 to 10 carbon atoms, and where R4 and R5 are functional groups.
Dependencies are inferred from the claim text.