Wide-Range Alkaline Hydrogen Peroxide Concentration Soft-Sensor with Ohmic Drop Compensation Base on a Normal Glass-Carbon Electrode

A novel electrochemical soft-sensor for hydrogen peroxide (HP) detection in high-concentration NaOH solution based on a normal glassy carbon electrode was fabricated. Firstly, the effect of rotation speed on amperometric detection was investigated to determine the optimal electrode rotation speed. T...

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Bibliographic Details
Published in:Electrocatalysis 2022-05, Vol.13 (3), p.255-268
Main Authors: Zhu, Zhijuan, Xiang, Zhong
Format: Article
Language:English
Subjects:
Algorithms
Back propagation networks
Catalysis
Chemical sensors
Chemistry
Chemistry and Materials Science
Compensation
Electrical measurement
Electrochemistry
Electrodes
Energy Systems
Glassy carbon
Hydrogen peroxide
Ohmic drop
Original Research
Physical Chemistry
Rotation
Sensors
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Summary:A novel electrochemical soft-sensor for hydrogen peroxide (HP) detection in high-concentration NaOH solution based on a normal glassy carbon electrode was fabricated. Firstly, the effect of rotation speed on amperometric detection was investigated to determine the optimal electrode rotation speed. Then, the amperometric response under different HP concentration, NaOH concentration, and solution temperature was implemented and analyzed. As the increase of the HP concentration in the solution would cause the increase of the solution impedance, an improved Butler-Volmer model with an ohmic drop compensation item was proposed to improve the sensor’s adaptability in a wide solution concentration range. Solution conductivity was adopted as an auxiliary variable to fix the model’s ambiguity with a four-layer BP neural network algorithm. Results revealed that the electrochemical sensor exhibited a wide detection range from 0 to 30 g L −1 in 10~30 g L −1 NaOH solution within a temperature range of 30–70 ℃ at 0.45 V (vs Ag/AgCl/Cl − ). Graphic Abstract
ISSN:1868-2529
1868-5994
DOI:10.1007/s12678-021-00702-6