Electrochemical Sensing of Hydrazine Compounds

Electrochemical sensing of hydrazine compounds has emerged as a critical tool for environmental monitoring, industrial process control and public health protection. Hydrazine, a highly reactive and toxic reducing agent, is widely used in fuels, pharmaceuticals and agricultural chemicals, yet poses significant risks to human health and ecosystems. Electrochemical sensors exploit controlled redox reactions at electrode surfaces to convert hydrazine concentration into measurable currents, offering rapid, sensitive and portable detection. Advances in nanomaterials, surface functionalisation and electrode architectures have driven continuous improvements in sensitivity, selectivity and stability. From metal‐oxide nanostructures to carbon‐based composites and organic–inorganic hybrids, recent designs focus on lowering overpotential, minimising interferences and extending linear detection ranges. The global relevance of sensitive hydrazine monitoring spans factory emissions, water quality assessment and emergency response to chemical spills, underscoring the importance of robust, field‐deployable electrochemical platforms.

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Electrochemical Sensing of Hydrazine Compounds publication trend

The graph below shows the total number of articles in electrochemical sensing of hydrazine compounds across all publications each year (not limited to Nature Index journals).

Technical terms

Electrocatalysis: Acceleration of redox reactions at an electrode surface by a catalyst, reducing energy barriers and improving reaction rates.

Overpotential: Additional potential required beyond the thermodynamic redox potential to drive an electrochemical reaction at a given rate.

Limit of detection (LOD): Lowest concentration of analyte that produces a signal distinguishable from background noise, typically defined at a signal-to-noise ratio of 3.

Sensitivity: Change in sensor response (current or voltage) per unit change in analyte concentration, often expressed in µA µM⁻¹ cm⁻² or similar units.

Linear dynamic range: Concentration interval over which the sensor response is directly proportional to analyte concentration with acceptable accuracy.

Nanohybrid: Composite material combining inorganic nanostructures with organic matrices or polymers to integrate complementary properties such as biocompatibility and conductivity.

References

1. Melt-quenched vanadium pentoxide-stabilized chitosan nanohybrids for efficient hydrazine detection. Materials Advances (2021).
2. Facile Gram-Scale Synthesis of NiO Nanoflowers for Highly Selective and Sensitive Electrocatalytic Detection of Hydrazine. ACS Omega (2023).