Silver Nanocluster Catalyst for CO2 Conversion
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Solution Overview
Problem
Current electrochemical carbon dioxide reduction technologies face challenges with high ionic resistance and mass transfer resistance, particularly in large-area electrodes, and rely on costly gold catalysts, which limits their scalability and efficiency.
Innovation Solution
Development of a silver nanocluster catalyst with a specific chemical formula XAg14(R1)n, where R1 is an alkyl or aryl group, and X is a halogen, supported on a porous carbon body, used in a zero-gap reactor with a gas diffusion electrode, enhancing catalytic activity through electrochemical treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional flow electrolytic cells with gap structure are used, then the electrode and separator can be easily manufactured, but ionic resistance and mass transfer resistance increase significantly
Solution Approach 1:
The patent removes the gap between the electrode and separator by extracting the spacing structure, achieving direct contact between the gas diffusion electrode and separator. This eliminates the ionic resistance and mass transfer resistance associated with gap structures while maintaining ease of manufacture through the zero-gap configuration.
Solution Approach 2:
The patent employs a porous gas diffusion electrode with optimized pore structure that allows direct ionic contact with the separator. The porous structure facilitates ion transport through the electrode material itself, eliminating the need for a gap while maintaining low ionic resistance and high mass transfer efficiency.
2Reliability
If gold catalysts are used for carbon dioxide conversion, then catalytic activity is achieved, but cost and availability become limiting factors
Solution Approach 1:
The patent replaces expensive gold catalysts with silver nanoclusters that are significantly cheaper and more abundant. The silver nanoclusters maintain catalytic activity for carbon dioxide conversion while reducing material cost and improving availability, making the technology economically viable for large-scale deployment.
Solution Approach 2:
The patent changes the catalyst material parameter from gold to silver, and further optimizes by controlling the nanocluster size and composition. This parameter change maintains catalytic functionality while dramatically reducing cost, enabling scalable carbon dioxide conversion applications.
3Quantity of substance
If conventional silver catalysts are used, then cost is reduced compared to gold, but catalytic activity and selectivity are insufficient
Solution Approach 1:
The patent creates composite silver nanoclusters with controlled composition and structure, combining silver with specific ligands and co-catalysts to enhance catalytic activity and selectivity. This composite structure maintains the cost advantage of silver while achieving performance levels previously only attainable with precious metal catalysts.
Solution Approach 2:
The patent applies local quality optimization by controlling the size, shape, and surface composition of silver nanoclusters at the nanoscale. Specific crystal facets and surface sites are engineered to enhance catalytic activity and selectivity for desired carbon dioxide conversion products, maximizing the intrinsic activity of each silver atom.
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 silver nanocluster catalyst exhibits superior carbon dioxide conversion rates, high selectivity for syngas production, and improved stability compared to conventional gold and silver catalysts, enabling efficient and cost-effective conversion of carbon dioxide into valuable carbon compounds.
Implementation Method 1
the technology for converting carbon dioxide through electrochemical reduction is gaining attention. This technology involves applying electrical energy to generate a potential difference between electrodes, thereby facilitating the movement of electrons to reduce carbon dioxide into useful carbon compounds
Implementation Method 2
silver nanocluster catalyst for electrochemically converting carbon dioxide, reducing water, or producing syngas with controlled composition
Implementation Method 3
gas diffusion electrode including same
Data Source
AI summary
The present invention relates to a silver nanocluster catalyst for electrochemically treated carbon dioxide conversion, water reduction reactions, or syngas synthesis involving a mixture of hydrogen and carbon monoxide; a gas diffusion electrode comprising the same; a zero-gap reactor comprising the same; and a method for converting carbon dioxide using the same, which exhibits excellent conversion efficiency and high selectivity.