Textile material-based porous water splitting catalyst and preparation method therefor
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Solution Overview
Problem
Conventional water splitting catalysts face challenges with high costs due to the use of expensive metals, limited contact areas between catalytically active sites and electrolytes, and poor charge transfer, which hampers their overall performance.
Innovation Solution
A fabric-based porous water splitting catalyst is developed, where a metal is uniformly coated on the surface of fibers constituting a porous insulating fabric support through electroplating. This catalyst includes a bonding layer, a conductive layer with a nanoparticle and monomolecular layer, and a catalyst layer formed by electroplating a catalytic metal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional water splitting catalysts use expensive metals like Pt, Ir, and Ru in nanoparticle or powder form, then catalytic activity is achieved, but cost increases and contact area between active sites and electrolytes is limited
Solution Approach 1:
The patent employs a porous fabric support structure that provides high surface area and abundant active sites for catalysis. The porous architecture allows electrolyte penetration and maximizes contact between catalytic metal sites and reactants, eliminating the need for expensive nanoparticle formulations while maintaining high catalytic activity.
Solution Approach 2:
The invention creates a composite catalyst system consisting of a fabric support, bonding layer, conductive layer with metal nanoparticles, and electroplated catalytic metal layer. This multi-layer composite structure combines the advantages of different materials to achieve high catalytic performance at reduced cost compared to conventional pure metal nanoparticle catalysts.
2Ease of manufacture
If metal nanoparticles are blended with carbon black and Nafion polymer, then the catalyst can be applied, but charge transfer is reduced and catalytic performance deteriorates
Solution Approach 1:
The patent removes the insulating Nafion polymer from the catalyst composition entirely. Instead, it uses a conductive layer made of metal nanoparticles combined with a bonding layer that provides both structural support and electrical conductivity, eliminating the charge transfer bottleneck caused by insulating materials while maintaining ease of application.
Solution Approach 2:
The conductive layer acts as an intermediary between the fabric support and the catalytic metal layer, providing efficient charge transfer pathways. This conductive intermediate layer replaces the problematic Nafion polymer and enables effective electron transport while maintaining catalyst stability and applicability.
3Reliability
If a uniform metal coating is applied through electroplating, then charge transporting properties and electrical conductivity are enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary electroplating of catalytic metal onto the conductive layer before final catalyst assembly. This pre-coating step ensures uniform metal distribution and optimal electrical conductivity are achieved in advance, simplifying subsequent manufacturing steps and ensuring consistent catalyst performance without requiring complex post-processing.
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 uniform metal coating enhances charge transporting properties and electrical conductivity comparable to that of the metal, while maintaining porosity for increased surface area, leading to high-performance water splitting catalysts with improved efficiency and reduced costs.
Implementation Method 1
a catalyst layer including a catalytic metal and formed by electroplating the catalytic metal on the conductive layer
Data Source
AI summary
The present invention relates to a textile material-based porous water splitting catalyst and a preparation method therefor, and the textile material-based porous water splitting catalyst according to the present invention comprises: a porous textile support (10) formed by the inter-crossing of a plurality of fibers (11); binding layers (20) formed on the surface of the fibers (11); conductive layers (30) comprising nanoparticle layers (31), which comprise metal nanoparticles and are formed on the binding layers (20), and monomolecular layers (33), which comprise a monomolecular material containing an amine group (NH2) and are formed on the nanoparticle layers (31); and catalyst layers (40) which comprises a catalytic metal, and which is formed on the conductive layers (30) by the electroplating of the catalytic metal.