Pd-Ir-M Alloy Catalyst for Fuel Cell Oxygen Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high production costs of platinum-based electrode catalysts in fuel cells due to the expensive nature of platinum, necessitating the development of non-platinum based catalysts with high performance.
Innovation Solution
A non-platinum based electrode catalyst comprising palladium, iridium, and a metallic component such as manganese, gadolinium, indium, or zirconium, which forms an alloy and oxide to enhance oxygen reduction reaction activity, prepared through a method involving precursor mixing, pH adjustment, reduction, washing, drying, and heat treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If platinum-based electrode catalysts are used in fuel cells, then high catalytic activity and reliability are achieved, but production costs increase significantly
Solution Approach 1:
The patent replaces expensive platinum catalysts with cheaper non-platinum based catalysts containing Pd, Ir, and metal M components. This substitution directly addresses the cost issue while maintaining catalytic functionality through the synergistic combination of multiple metal elements, effectively implementing the principle of using cheaper alternative materials to reduce production costs.
Solution Approach 2:
The invention creates a composite catalyst system comprising Pd, Ir, and at least one metal M (such as Mn, Gd, In, Y, Zr, Sn, Cr, or V) along with their oxides. This composite structure leverages the synergistic effects of different metal components to achieve high catalytic activity comparable to or exceeding platinum-based catalysts, while significantly reducing material costs.
2Ease of manufacture
If non-platinum based electrode catalysts are developed to reduce production costs, then manufacturing expenses decrease, but catalytic activity and performance may be compromised
Solution Approach 1:
The patent optimizes the composition parameters of the non-platinum catalyst by specifying precise ratios of Pd, Ir, and metal M components, along with controlled oxidation states. The catalyst comprises Pd (1-50 wt%), Ir (1-50 wt%), and metal M (1-50 wt%), with specific Embodiments providing narrower ranges (e.g., Pd: 5-30 wt%, Ir: 5-30 wt%, Metal M: 5-30 wt%). These parameter optimizations ensure high catalytic activity while maintaining cost-effectiveness.
Solution Approach 2:
The invention develops a composite catalyst system comprising Pd, Ir, and at least one metal M (such as Mn, Gd, In, Y, Zr, Sn, Cr, or V) along with their oxides. This composite structure leverages the synergistic effects of different metal components to achieve high catalytic activity comparable to or exceeding platinum-based catalysts, while significantly reducing material costs.
3Reliability
If complex multi-metal catalyst compositions are used to enhance performance, then oxygen reduction activity improves, but device complexity increases
Solution Approach 1:
The patent optimizes the composition parameters of the non-platinum catalyst by specifying precise ratios of Pd, Ir, and metal M components, along with controlled oxidation states. The catalyst comprises Pd (1-50 wt%), Ir (1-50 wt%), and metal M (1-50 wt%), with specific Embodiments providing narrower ranges (e.g., Pd: 5-30 wt%, Ir: 5-30 wt%, Metal M: 5-30 wt%). These parameter optimizations ensure high catalytic activity while maintaining cost-effectiveness.
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 catalyst achieves stable and high oxygen reduction activity, reducing production costs while maintaining high performance in fuel cells like PEMFCs and DMFCs, with optimized activity through specific metal ratios and support materials.
Implementation Method 1
reducing the pH-adjusted mixture
Implementation Method 2
heat treating the washed and dried product
Implementation Method 3
a catalyst layer for catalyzing reduction of an oxidant
Data Source
AI summary
Non-platinum (Pt) electrode catalysts for fuel cells, methods of manufacturing the same, and fuel cells including the non-Pt electrode catalysts. Each of the non-Pt electrode catalysts for fuel cells includes at least palladium (Pd) and iridium (Ir), and further includes a metal, oxide of the metal, or mixture thereof for compensating for the activity of Pd and Ir.