Metal Complex Electrode Catalyst for Fuel Cell Oxygen Reduction
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Solution Overview
Problem
The existing electrode catalysts for fuel cells have insufficient oxygen reduction ability.
Innovation Solution
A metal complex is developed, comprising residues derived from a specific compound and a divalent aromatic group, which is supported on a conductive carbon, enhancing the oxygen reduction capability. The metal complex includes a ligand with heterocyclic rings and aromatic groups, and is modified by heating with a carbon support to improve its properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal complex including a macrocyclic compound ligand is used as an electrode catalyst, then the catalyst structure is well-defined and stable, but the oxygen reduction ability is insufficient
Solution Approach 1:
The patent combines a metal complex (with macrocyclic compound ligand) with a specific organic compound containing heterocyclic rings and aromatic groups to form a composite electrode catalyst. This composite structure integrates the stability of the metal complex with the enhanced oxygen reduction capability of the organic compound, resolving the contradiction between catalyst stability and oxygen reduction ability
Solution Approach 2:
The patent modifies the electrode catalyst by changing the chemical composition parameters - specifically incorporating compounds with particular heterocyclic ring structures and aromatic groups. These parameter changes in molecular structure enhance the oxygen reduction ability while maintaining the stable metal complex framework
2Stability of the object's composition
If a complex metal complex structure is designed to improve stability, then the catalyst maintains its structure, but the oxygen reduction performance is limited
Solution Approach 1:
The patent merges two distinct functional components: a stable metal complex and an organic compound with heterocyclic/aromatic structures. The metal complex provides structural stability while the organic compound contributes enhanced oxygen reduction performance, achieving both goals simultaneously through combination
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resulting electrode catalyst exhibits a high degree of oxygen reduction ability and can be easily produced, demonstrating improved performance in fuel cell applications.
Implementation Method 1
an electrode catalyst in which a metal complex which includes of a ligand including one macrocyclic compound or a ligand including residues of one macrocyclic compound and a metal atom is supported on conductive carbon
Implementation Method 2
The metal complex includes a ligand with heterocyclic rings and aromatic groups, and is modified by heating with a carbon support to improve its properties
Data Source
AI summary
Provided is a compound including residues derived from a compound represented by Formula (1) and a divalent aromatic group, wherein the number of the residues is 2 to 4, the number of the divalent aromatic group is 1 to 3, and the sum of the numbers of the residues and the divalent aromatic group is 3 to 5.In Formula (1), each of Y1 to Y4 represent a group represented by any of the following Formula (2); in the following Formula (2), Rα represents a hydrogen atom or a hydrocarbyl group; each of P1 to P4 represents an atomic group forming a heterocyclic ring containing Y1 to Y4; P5 and P6 represent an atomic group forming an aromatic ring or a heterocyclic ring; Q1 and Q2 represent a linking group or a direct bond; and Z1 and Z2 represent a hydrogen atom or a group represented by any of the following Formula (3); and in the following Formula (3), Rβ represents a hydrogen atom or a hydrocarbyl group.