Porous electrode, and electrochemical element made using the same
View Patent ↗The primary object of the present invention is to provide an electrode with which an efficient electrode reaction will occur. The present invention relates to a porous electrode which is an electrode composed of a porous material having electron conductivity, wherein (1) the porous material comprises a three-dimensional skeleton, (2) a substance having one or more proton affinity groups is present on all or part of the three-dimensional skeleton surface, and (3) a catalyst for separating hydrogen into protons and electrons is further included, with the catalyst being supported on the substance.
1. A porous electrode comprising a porous material having electron conductivity, wherein (1) the porous material comprises a three-dimensional skeleton, (2) a substance having one or more proton affinity groups is present on all or part of the three-dimensional skeleton surface,
wherein the substance is a dendrimer having one or more proton affinity groups on the surface, wherein, said dendrimer is based on a polyamide-amine, polypropyleneimine, polyether, aliphatic polymer or aromatic polymer and
(3) a catalyst for separating hydrogen into protons and electrons is supported on the inside of the dendrimer.
2. The porous electrode according to claim 1 , wherein the porous material is a carbon material.
3. The porous electrode according to claim 1 , obtained by impregnating a porous material with a solution or dispersion containing a substance that has one or more proton affinity groups.
4. The porous electrode according to claim 1 , wherein the porosity of the porous material is at least 20% and not more than 80%.
5. The porous electrode according to claim 1 , wherein the specific surface area of the porous material is at least 10 m 2 /g and not more than 500 m 2 /g.
6. A method for manufacturing a porous electrode comprising a porous material having electron conductivity, wherein (1) the porous material comprises a three-dimensional skeleton, (2) a substance having one or more proton affinity groups is present on all or part of the three-dimensional skeleton surface,
wherein the substance is a dendrimer having one or more proton affinity groups on the surface, wherein, said dendrimer is based on a polyamide-amine, polypropyleneimine, polyether, aliphatic polymer or aromatic polymer and
(3) a catalyst for separating hydrogen into protons and electrons is supported on the inside of the dendrimer,
comprising a step of impregnating the porous material with a solution or dispersion containing said substance which supports said catalyst.
7. An electrochemical element comprises a fuel electrode that produces protons from a fuel and an oxygen electrode that reacts protons with oxygen,
wherein the fuel electrode and the oxygen electrode are disposed across from each other with a proton-conductive solid electrolyte in between, and wherein at least one of the electrodes is the porous electrode according to claim 1 .
8. The electrochemical element according to claim 7 , wherein the fuel is hydrogen.
9. The electrochemical element according to claim 8 , wherein the fuel is methanol.
10. The porous electrode according to claim 1 , wherein the dendrimer has one or more porous material affinity groups on the surface.
11. The method for manufacturing a porous electrode according to claim 6 , wherein the dendrimer has one or more porous material affinity groups on the surface.
12. The electrochemical element according to claim 7 , wherein the dendrimer has one or more porous material affinity groups on the surface.
13. The porous electrode according to claim 1 , wherein the porous electrode comprise a dendrimer that does not support the catalyst.
14. The method for manufacturing a porous electrode according to claim 6 , wherein the porous electrode comprise a dendrimer that does not support the catalyst.
15. The electrochemical element according to claim 7 , wherein the porous electrode comprise a dendrimer that does not support the catalyst.