Iron-Copper Alloy Nanoparticle Mesh for Uniform Porous Support
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Solution Overview
Problem
The challenge lies in alloying metals that are easily phase-separated in the bulk state, such as iron and copper, during nanoparticle deposition, and in uniformly supporting nanoparticles within a co-continuous body while preventing aggregation, which is complicated by compatibility with solvents and temperature conditions.
Innovation Solution
A mesh structure body supporting alloy nanoparticles of iron and copper is created by freezing a sol or gel with a dispersed co-continuous body, drying it in a vacuum, and using a protein template to uniformly distribute and stabilize the nanoparticles, followed by heat treatment to remove the protein template.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If metals that are easily phase-separated in the bulk state (such as iron and copper) are alloyed during nanoparticle deposition, then new properties and cost reduction are achieved, but the metals separate during particle deposition making alloying difficult
Solution Approach 1:
The patent changes the deposition parameters by controlling pH, potential, and temperature to enable alloying of metals that normally phase-separate. By adjusting these parameters during electrodeposition, the patent achieves stable alloy composition of iron and copper nanoparticles despite their inherent tendency to separate in bulk state
Solution Approach 2:
The patent creates composite alloy nanoparticles by simultaneously depositing multiple metal components (iron and copper) in a controlled manner. The resulting composite material exhibits properties different from individual metals, achieving both new functionality and cost reduction
2Stability of the object's composition
If a co-continuous body is used as the support for supporting nanoparticles, then the support maintains its shape and structure, but it is difficult to allow the support to uniformly support the nanoparticles even into its inside
Solution Approach 1:
The patent uses electrodeposition (an electrochemical process involving ion transport in solution) to uniformly distribute nanoparticles throughout the co-continuous body. The electric field and ion diffusion enable penetration into the internal porous structure, achieving uniform distribution both on the surface and inside the support
Solution Approach 2:
The patent utilizes the porous structure of the co-continuous body to enable uniform nanoparticle support. The porous network allows deposition solution penetration and nanoparticle distribution throughout the internal structure, maintaining both structural stability and uniform nanoparticle loading
3Quantity of substance
If the support is in the form of powder to increase surface area, then catalyst activity is improved, but the powder is troublesome to collect and the support dissipates with repeated use
Solution Approach 1:
The patent creates a co-continuous body that serves multiple functions simultaneously: it provides high surface area for catalyst support, maintains structural integrity for easy handling, and ensures durability for repeated use. The interconnected porous network achieves both high surface area and mechanical stability
4Quantity of substance
If nanoparticles are highly dispersed to improve catalyst activity, then catalytic performance is enhanced, but aggregation occurs due to compatibility issues with solvent and temperature conditions
Solution Approach 1:
The patent replaces mechanical mixing with electrochemical deposition to achieve and maintain nanoparticle dispersion. The electrodeposition process creates uniform distribution through controlled ion reduction, preventing aggregation that typically occurs with mechanical methods due to solvent compatibility and temperature issues
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
This method enables the uniform support of alloy nanoparticles with consistent particle diameters within the mesh structure body, preventing aggregation and ensuring effective dispersion both on and inside the structure.
Implementation Method 1
alloy nanoparticles of iron and copper supported inside the mesh structure body
Data Source
AI summary
A protein template is added to a solution in which metal ions of iron and copper are dissolved to introduce the metal ions into the protein template; the protein template is separated from metal ions that have not been incorporated in the protein template; the metal ions that have been incorporated in the protein template are reduced to obtain a protein containing alloy nanoparticles of iron and copper; a sol or gel in which a co-continuous body is dispersed is frozen; the frozen sol or gel is dried in a vacuum to obtain a porous body; the porous body is allowed to support the alloy nanoparticle containing protein; and the protein is removed.