Characteristics of Solid-State Amperometric Oxygen Sensor Using Pt/C Film Hot-Pressed onto Nafion Membrane

Liu, Yuchuan; Tzeng, Iou-Jeng

doi:10.1002/1521-4109(200111)13:17<1441::aid-elan1441>3.0.co;2-a

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…As a consequence, considerable efforts have been made into the development of DO measurement methods [2]. The widely studied method for DO measurement is Clark electrode and its modified forms [3][4][5], including the potentiometric DO sensors based on metal oxides electrodes [6][7][8]. Although electrochemical-based DO sensors can provide accurate measurement results, its drawbacks, such as the slow response time, a "static" reading and the aging of the electrodes, have limited its general application [9].Optical methods such as fiber optic sensors [10] offer attractive alternatives to the electrochemical-based DO sensors due to the fast response time, little oxygen consumption and no interference from exterior electromagnetic fields [9][10][11].Among these optical methods for DO detection, fluorescence-based and luminescencebased DO sensors have received special attention [11,12].…”

Section: Introductionsupporting

confidence: 73%

Optical and Electrochemical Combination Sensor with Poly‐Aniline Film Modified Gold Surface and Its Application for Dissolved Oxygen Detection

Liu

Correia

et al. 2014

Electroanalysis

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Poly‐aniline (PAn) film can be oxidized by contacting oxygen in an electron‐transfer reaction and its redox state, for instance the open circuit potential and the dielectric constant, is quantitatively related to oxygen concentration. This feature may contribute to an improved application of dissolved oxygen (DO) detection with the combined optical and electrochemical sensor. In this paper, PAn is used as a sensing surface to detect DO by the combination sensor composed of electrochemistry and total internal reflection imaging ellipsometry (EC‐TIRIE). Results demonstrate that both optical and electrical signals show a logarithmic correlation with DO concentration (0–20 ppm). Compared with the results obtained only with the gold surface, both the optical and electrical signals of the EC‐TIRIE sensor for DO detection are amplified with the PAn modified gold surface.

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Section: Introductionsupporting

confidence: 73%

Optical and Electrochemical Combination Sensor with Poly‐Aniline Film Modified Gold Surface and Its Application for Dissolved Oxygen Detection

Liu

Correia

et al. 2014

Electroanalysis

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Improved Potentiometric and Optic Sensitivity of Polyaniline Film to Dissolved Oxygen by Incorporating Iron‐Porphyrin

Ornelas

Liu

et al. 2015

Electroanalysis

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Polyaniline (PAn) films can be used in an electrochemical and optical combination system to amplify the optical signal for dissolved oxygen (DO) detection. To further improve the sensitivity of PAn film to DO, an oxygen‐sensitive molecule, Fe(III) meso‐tetera (4‐sulfonatophenyl) porphyrin (FeTSPP) is incorporated into PAn during the film generation. Results show that, after incorporating FeTSPP into the PAn matrix, both optical and potentiometric responses to DO are improved. The optimal optical signal is obtained under the application of −2.5 μA to the modified electrode. Under this applied current, both optical and potentiometric signals show linear relations with the DO concentration within the range of 0.00–4.63 mg L−1, and the sensitivities for optical and potentiometric signals are 4.18 grayscale units mg−1 L and 13.39 mV mg−1 L, respectively.

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Electrochemical Hydrogen Sensor Assembly for Monitoring High‐Concentration Hydrogen

Lee

Jung

et al. 2022

Physica Status Solidi (a)

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The demand for hydrogen energy is rapidly increasing because of its clean, abundant, and efficient nature. To utilize hydrogen gas as a fuel for fuel‐cell vehicles, several types of hydrogen sensors are needed to address cost and safety issues. Precise monitoring of hydrogen gas concentration is critical in optimizing vehicle fuel‐cell efficiency. Herein, a fully packaged hydrogen sensor to continuously measure a hydrogen concentration of 20–100% with environmental variations is fabricated, including temperature (from −40 to 105 °C), humidity (from 10 to 98 RH%), and pressure (from 30 to 350 kPa). A signal‐processing circuit is designed to reduce the error rate, and a sensor chip and printed circuit board are assembled in a module using a packaging process with robust materials for harsh vehicle environments. The result herein suggests direct application of the sensor to monitor hydrogen concentration in the hydrogen recirculation unit in a fuel‐cell vehicle.

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Characteristics of Solid-State Amperometric Oxygen Sensor Using Pt/C Film Hot-Pressed onto Nafion Membrane

Cited by 4 publications

References 26 publications

Optical and Electrochemical Combination Sensor with Poly‐Aniline Film Modified Gold Surface and Its Application for Dissolved Oxygen Detection

Optical and Electrochemical Combination Sensor with Poly‐Aniline Film Modified Gold Surface and Its Application for Dissolved Oxygen Detection

Improved Potentiometric and Optic Sensitivity of Polyaniline Film to Dissolved Oxygen by Incorporating Iron‐Porphyrin

Electrochemical Hydrogen Sensor Assembly for Monitoring High‐Concentration Hydrogen

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