Energy-Biosensor Synergy: Intrinsic Catalytic Reactions as Label-Free Signal Pathways

Area of Science:

• Electrochemistry
• Biosensing
• Materials Science

Background:

• Conventional electrochemical biosensors rely on electroactive labels, which present challenges for point-of-care applications, especially for small molecules.
• Current methods often require externally added redox reporters, increasing assay complexity and limiting scalability.

Purpose of the Study:

• To review energy-based electrochemical signal pathways (HER, ORR, water-splitting) as alternatives to traditional labels in biosensing.
• To highlight material design principles for reagentless and label-free transduction strategies using these energy-driven reactions.

Main Methods:

• Review of mechanistic principles connecting HER/ORR/water-splitting reactions to biosensor signal generation.
• Analysis of material design strategies for integrating these reactions into biosensing platforms.

Main Results:

• Energy-based pathways provide intrinsic electrochemical outputs, eliminating the need for synthetic redox mediators.
• Integration simplifies assay design, enhances robustness, and broadens target molecule compatibility.

Conclusions:

• Energy-driven electrochemical biosensing offers simplicity, reduced cost, faster operation, and improved commercial translation potential.
• This approach facilitates the development of next-generation bioanalytical methods without electroactive labels.