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US 7,125,822 B2Granted
Fuel cell catalyst and fuel cell
AssigneeKabushiki Kaisha Toshiba
InventorsYoshihiko Nakano, Wu Mei, Maki Yonetsu, Shinichi Onodera, Seiichi Suenaga, Hideyuki Ohzu
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Abstract
This invention provides a fuel cell catalyst including a carbon support containing at least one first element selected from the group consisting of B, N, and P, and catalyst particles supported on the carbon support, wherein the catalyst particles include at least one of platinum particles and alloy particles containing Pt and an element A, and the element A contains at least one element selected from the group consisting of platinum group elements and period 4 to 6 transition metal elements.
Claims19
A fuel cell catalyst comprising:
- a carbon support in which a carbon atom is substituted with a first element consisting of N and/or P;
- and
- catalyst particles supported on the carbon support,
- wherein the catalyst particles include at least one of platinum particles and alloy particles containing Pt and an element A, and the element A contains at least one element selected from the group consisting of platinum group elements, period 4 to 6 transition metal elements, and Sn.
1 more element
A fuel cell catalyst, comprising:
- a carbon support containing at least one element selected from the group consisting of B, N, and P;
- and
- alloy particles supported on the carbon support and containing an element A and Pt and,
- wherein the element A is at least one element selected from the group consisting of W, V, Mo, and Sn
- wherein the alloy particle satisfies
- Y1Y3 (2)
- where Y1 is the number of Pt atoms when the number of atoms of the element A on a surface of the alloy particle is 1, Y1 is larger than 1, and Y3 is the total number of Pt atoms when the total number of atoms of the element A of the alloy particle is 1.
4 more elements
A fuel cell catalyst comprising:
- composite material including
- a support containing at least one of an oxide represented by formula (3) below and a composite oxide represented by formula (4) below;
- MxOy (3)
- MxOy-M′aOb (4)
- wherein elements M and M′ can be the same or different, and each of the elements M and M′ is at least one element selected from the group consisting of Si, Ti, Al, Zr, Ge, Re, V, Mn, W, Mo, and Sn;
- catalyst particles supported on the support and having an average particle size of 1/10 or less of an average particles size of the support;
- and
- a carbon material extending from the catalyst particles and formed of at least one of carbon fiber and carbon tube, a length of carbon fiber and the carbon tube is equal to or larger than the average particle size of the catalyst particles.
5 more elements
A fuel cell comprising:
- a cathode electrode,
- an anode electrode, and
- an electrolyte layer provided between the cathode electrode and anode electrode,
- wherein at least one of the cathode electrode and anode electrode comprises:
- composite material including:
- a support containing at least one of an oxide represented by formula (3) below and a composite oxide represented by formula (4) below;
- MxOy (3)
- MxOy-M′aOb (4)
- wherein elements M and M′ can be the same or different, and each of the elements M and M′ is at least one element selected from the group consisting of Si, Ti, Al, Zr, Ge, Re, V, Mn, W, Mo, and Sn;
- catalyst particles supported on the support and having an average particle size of 1/10 or less of an average particle size of the support;
- and
- a carbon material extending from the catalyst particles and formed of at least one of carbon fiber and carbon tube, a length of the carbon fiber and the carbon tube is equal to or larger than the average particle size of the catalyst particles.
9 more elements
A fuel cell catalyst comprising:
- composite material including
- a support containing at least one of an oxide represented by formula (3) below and a composite oxide represented by formula (4) below;
- MxOy (3)
- MxOy-M′aOb (4)
- wherein elements M and M′ can be the same or different, and each of the elements M and M′ is at least one element selected from the group consisting of Si, Ti, Al, Zr, Ge, Re, V, Mn, W, Mo, and Sn;
- a carbon material supported on the support and formed of at least one of carbon fiber and carbon tube having a diameter smaller than that of the support;
- and
- catalyst particles formed on the carbon material,
- wherein an average particle size of the catalyst particles is 1/10 or less of an average particle size of the support, and a length of the carbon fiber and the carbon tube is equal to or larger than the average particle size of the catalyst particles.
6 more elements
A fuel cell comprising composite material which comprises
- a cathode electrode,
- an anode electrode, and
- an electrolyte layer provided between the cathode electrode and anode electrode,
- wherein at least one of the cathode electrode and anode electrode comprises:
- a support containing at least one of an oxide represented by formula (3) below and a composite oxide represented by formula (4) below;
- MxOy (3)
- MxOy-M′aOb (4)
- wherein elements M and M′ can be the same or different, and each of the elements M and M′ is at least one element selected from the group consisting of Si, Ti, Al, Zr, Ge, Re, V, Mn, W, Mo, and Sn,
- a carbon material supported on the support and formed of carbon fiber and/or carbon tube having a diameter smaller than that of the support;
- and
- catalyst particles formed on the carbon material,
- wherein an average particles size of the catalyst particles is 1/10 or less an average particle size of the support, and a length of the carbon fiber and the carbon tube is equal to or larger than the average particle size of the catalyst particles.
9 more elements
Dependencies are inferred from the claim text.