Nanostructured Electrodes for NADH Regeneration
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Solution Overview
Problem
Current methods for regenerating NADH and NADPH are hindered by the formation of inactive forms, high overpotentials, and the need for expensive catalysts, leading to purity issues and increased costs, which hinder their use in industrial biocatalytic processes and biofuel production.
Innovation Solution
The development of nanostructured electrodes comprising a copper substrate, a nanostructured copper oxide layer, and a nickel layer, which undergo photoelectrochemical modification to facilitate the direct regeneration of NADH and NADPH at low overpotentials, enhancing purity and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrochemical methods are used for NADH/NADPH regeneration, then the regeneration process can be achieved, but high overpotentials are required which lead to formation of inactive forms and non-useful products
Solution Approach 1:
The patent modifies the electrode material properties by creating a nanostructured copper oxide layer with specific crystallographic orientations (e.g., (100), (110), or (111) facets) and controlling its thickness (1-100 nm). This changes the electrochemical parameters of the electrode, enabling regeneration at lower overpotentials while maintaining high product purity and minimizing inactive form formation.
Solution Approach 2:
The patent employs a composite electrode structure consisting of a copper substrate combined with a nanostructured copper oxide layer. This composite material leverages the conductive properties of copper and the catalytic activity of copper oxide to achieve efficient NADH/NADPH regeneration at reduced overpotentials, avoiding the formation of inactive forms and non-useful products.
2Reliability
If conventional electrochemical methods are used for NADH/NADPH regeneration, then the regeneration process can be achieved, but expensive catalysts are required
Solution Approach 1:
The patent replaces expensive catalysts with a cost-effective copper oxide-based electrode. Copper oxide can be deposited on copper substrates through simple electrochemical or chemical methods, eliminating the need for precious metal catalysts while maintaining high product purity and regeneration efficiency.
Solution Approach 2:
The patent optimizes the copper oxide layer parameters including thickness (1-100 nm), crystallographic orientation, and surface area to maximize catalytic activity. By controlling these parameters, the electrode achieves high regeneration efficiency without requiring expensive catalysts, making the process economically viable.
3Productivity
If conventional methods are used for cofactor regeneration, then regeneration can be achieved, but formation of inactive forms affects product purity
Solution Approach 1:
The patent controls the electrode potential, pH, and electrochemical conditions to optimize the regeneration reaction. By adjusting these parameters, the system achieves high yields of active NADH/NADPH while minimizing the formation of inactive forms such as dimers or oxidized byproducts, thereby maintaining high product purity.
Solution Approach 2:
The copper oxide nanostructure provides specific catalytic sites that selectively promote the formation of active NADH/NADPH while suppressing side reactions that lead to inactive forms. The composite structure enables selective catalysis, ensuring high product purity and active form yield.
Data Source
AI summary
Disclosed herein are nanostructured electrodes and methods of making and use thereof. The nanostructured precursor electrodes comprising a copper substrate, a nanostructured copper oxide layer disposed on the copper substrate and a nickel layer disposed on the nanostructured copper oxide layer.