Metal catalyst composition modified by nitrogen-containing compound
AssigneeIndustrial Technology Research Institute
InventorsLi-Duan Tsai, Sung-Chun Chang, Hui-Wen Tsai, Chi-Yun Kang, Jiunn-Nan Lin
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Abstract
The present invention relates to a metal catalyst composition modified by a nitrogen-containing compound, which effectively reduces cathode catalyst poisoning. The catalyst composition applied on the anode also lowers the over-potential. The catalyst coupled with the nitrogen-containing compound has increased three-dimensional hindrance, which improves the distribution of the catalyst particles and improves the reaction activity.
Claims8
A metal catalyst modified by a nitrogen-containing compound, wherein the nitrogen-containing compound is a nitrogen-containing 5-membered heterocyclic compound, wherein the nitrogen-containing compound is selected from the following group consisting of pyrrole and pyrrole derivatives (pyrroles), pyrroline and pyrroline derivatives (pyrrolines), imidazole and imidazole derivatives (imidazoles), imidazoline and imidazoline derivatives (imidazolines), and triazole and triazole derivatives (triazoles), wherein the nitrogen-containing compound has the structure of the following formula (I):
- wherein R1-R5 are individually hydrogen, alkyl, NH2 or NR6R7, R6 and R7 are individually alkyl, hydroxyl or alkoxyl, X1 is nitrogen, and X2, X3, X4 and X5 are individually carbon or nitrogen, and the nitrogen-containing compound is electro-neutral;
- or
- the nitrogen-containing compound has the structure of the following formula
- wherein S1-S7 are individually hydrogen, alkyl, NH2 or NS8S9, S8 and S9 are individually alkyl, hydroxyl or alkoxyl, Y1 is nitrogen and Y2, Y3, Y4 and Y5 are individually carbon or nitrogen, and the nitrogen-containing compound is electro-neutral.
A membrane electrode assembly for a fuel cell, comprising:
- a proton exchangeable polymer membrane;
- a cathode catalyst layer and an anode catalyst layer respectively disposed on both sides of the polymer membrane;
- and
- two gas diffusion layers respectively disposed on the cathode and anode catalyst layers, wherein at least one of the cathode and anode catalyst layers includes a metal catalyst modified by a nitrogen-containing compound, and the nitrogen-containing compound is a nitrogen-containing 5-membered heterocyclic compound, wherein the nitrogen-containing compound is selected from the following group consisting of pyrrole and pyrrole derivatives (pyrroles), pyrroline and pyrroline derivatives (pyrrolines), imidazole and imidazole derivatives (imidazoles), imidazoline and imidazoline derivatives (imidazolines), and triazole and triazole derivatives (triazoles), wherein the nitrogen-containing compound has the structure of the following formula (I):
- wherein R1-R5 are individually hydrogen, alkyl, NH2 or NR6R7, R6 and R7 are individually alkyl, hydroxyl or alkoxyl, X1 is nitrogen, and X2, X3, X4 and X5 are individually carbon or nitrogen, and the nitrogen-containing compound is electro-neutral;
- or
- the nitrogen-containing compound has the structure of the following formula (II)
- wherein S1-S7 are individually hydrogen, alkyl, NH2 or NS8S9, S8 and S9 are individually alkyl, hydroxyl or alkoxyl, Y1 is nitrogen and Y2, Y3Y4 and Y5 are individually carbon or nitrogen, and the nitrogen-containing compound is electro-neutral.
Dependencies are inferred from the claim text.