Highly Efficient Electrosynthesis of Nitric Oxide for Biomedical Applications

Area of Science:

• Biomimetic catalysis
• Electrochemistry
• Materials Science

Background:

• Nitric oxide (NO) is a crucial signaling molecule with diverse therapeutic applications.
• Efficient and controlled generation of NO is essential for its concentration-dependent therapeutic efficacy.
• Existing methods for NO generation require optimization for enhanced control and efficiency.

Purpose of the Study:

• To develop a highly efficient and controllable electrochemical system for nitric oxide (NO) generation.
• To investigate a single-iron atom based biomimetic catalyst (Fe SAC) for nitrite reduction.
• To evaluate the potential of the generated NO for antibacterial applications.

Main Methods:

• Design and synthesis of a single-iron atom based biomimetic catalyst (Fe SAC).
• Electrochemical reduction of nitrite using the Fe SAC to generate NO.
• Characterization of NO generation rate and potential-dependent control.
• Assessment of the antibacterial efficacy of the generated NO against Gram-negative and Gram-positive bacteria.

Main Results:

• The Fe SAC demonstrated superior catalytic activity for electrochemical nitrite reduction.
• Maximal NO generation rate achieved was 2.1 μM/(min·μg).
• Theoretical studies indicated that decreased Gibbs-free energy of nitrite adsorption on the single iron atom enhances catalytic efficiency.
• Controllable NO generation was achieved in a potential-dependent manner.
• Generated NO exhibited broad-spectrum antibacterial activity against both Gram-negative and Gram-positive strains.

Conclusions:

• The developed Fe SAC system enables highly efficient and controlled NO generation.
• This biomimetic catalyst holds significant promise for advancing NO-based therapeutics and antibacterial strategies.
• The findings highlight the potential of single-atom catalysts in electrochemical applications for biomedical purposes.