Amperometric H2 sensor with PtxPdy alloy electrode prepared by pulsed electrodeposition method

Jayanthi, E.; Murugesan, N.; Ramesh, C.

doi:10.1016/j.microc.2020.104851

Cited by 5 publications

(1 citation statement)

References 51 publications

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“…Nafion proton conducting membranes are widely used as SPEs of SS-AEGs thanks to their excellent water diffusivity, high proton conductivity, and good chemical stability . In such acid media, precious metal group (PMG) materials such as Pt/C, Au, and Pd are commonly employed as the WE to electrochemcial catalyze oxygen reduction reaction (ORR) − · For instance, Lu et al applied Pt–Rh/C as the composite sensing electrode to realize rapid response to 0.1–200 ppm of H 2 S at room temperature . However, the high costs and limited supply of PMG severely hinder the commercialization of amperometric sensors.…”

Section: Introductionmentioning

confidence: 99%

Fast Response Room Temperature Amperometric Gas Sensors with Modified Fe–N–C Electrodes for ppb-Level H₂S Detection

Ma,

Lin,

et al. 2024

ACS Appl. Nano Mater.

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Monitoring halitosis indirectly by detecting H 2 S biomarkers with gas sensors is an emerging technique that holds great promise. However, developing H 2 S sensors with exceptional selectivity and sensitivity, as well as a detection limit in the ppb range, remains a significant technological challenge. To address these issues, we have fabricated amperometric H 2 S gas sensors utilizing modified Fe−N−C catalysts as electrodes. The modified Fe−N−C catalyst obtained by heat treatment of ammonium chloride salt exhibits a higher specific surface area, improved ORR catalytic performance, and excellent stability in acidic environments, which enhance the sensitivity and durability of amperometric H 2 S sensors. The amperometric sensors demonstrate a sensitivity of up to 502.0 nA ppm −1 for H 2 S and exhibit rapid response time with only 22.5 s for response and 9.0 s for recovery time toward 3 ppm of H 2 S. Moreover, they display good sensitivity (approximately 1506.0 nA at 3 ppm of H 2 S) and achieve a low limit of detection (LOD) of around 0.01 ppm. Additionally, the sensors exhibit excellent selectivity while being capable of detecting changes in trace amounts of H 2 S concentration within an exhaled breath environment. Our study presents experimental evidence demonstrating the successful detection of H 2 S in exhaled breath using amperometric sensors with modified Fe−N−C electrodes.

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Section: Introductionmentioning

confidence: 99%

Fast Response Room Temperature Amperometric Gas Sensors with Modified Fe–N–C Electrodes for ppb-Level H₂S Detection

Ma,

Lin,

et al. 2024

ACS Appl. Nano Mater.

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High‐Selectivity Hydrogen Gas Sensors based on Mesoporous PbO_x‐ZnO Nanocomposites

Fegade,

Alshahrani,

et al. 2023

Chemistry An Asian Journal

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Hydrogen heralded as a promising renewable and environmentally friendly energy carrier, carries inherent risks owing to its highly flammable nature. A mere 4 % concentration of hydrogen in the air can trigger an explosion. To counteract this peril, a composite material comprising PbOX‐ZnO (2 : 1) was synthesized, characterized, and subsequently employed to fabricate a hydrogen sensing device. Various analytical tools were used to characterize as‐deposited materials, including X‐ray diffraction, Scanning electron microscopy /Energy Dispersive X‐ray Spectroscopy, Transmission electron microscopy UV‐Vis Reflectance Spectroscopy and Fourier‐transform infrared spectroscopy. The device exhibited favorable properties, such as good selectivity, stability, and a low detection limit for hydrogen. At ambient room temperature, the device demonstrated a sensing signal reaching 468.7, with a response time (T90) of 155 seconds and a recovery time (Tr90) of 69 seconds when exposed to a hydrogen concentration of 5 ppm. This performance underscores the device‘s rapid and effective response to hydrogen exposure. Moreover, the PbOX‐ZnO (2 : 1) composite‐based device exhibited a detection limit of 2.4 ppm, functioning accurately within a linear range spanning from 5 ppm to 50 ppm. This capability confirms its precision in accurately detecting hydrogen concentrations within this designated range.

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Superiorly sensitive and selective H2 sensor based on p-n heterojunction of WO3–CoO nanohybrids and its sensing mechanism

Ding

Ansari

Yang

et al. 2021

International Journal of Hydrogen Energy

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Amperometric H2 sensor with PtxPdy alloy electrode prepared by pulsed electrodeposition method

Cited by 5 publications

References 51 publications

Fast Response Room Temperature Amperometric Gas Sensors with Modified Fe–N–C Electrodes for ppb-Level H₂S Detection

Fast Response Room Temperature Amperometric Gas Sensors with Modified Fe–N–C Electrodes for ppb-Level H₂S Detection

High‐Selectivity Hydrogen Gas Sensors based on Mesoporous PbO_x‐ZnO Nanocomposites

Superiorly sensitive and selective H2 sensor based on p-n heterojunction of WO3–CoO nanohybrids and its sensing mechanism

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Amperometric H2 sensor with PtxPdy alloy electrode prepared by pulsed electrodeposition method

Cited by 5 publications

References 51 publications

Fast Response Room Temperature Amperometric Gas Sensors with Modified Fe–N–C Electrodes for ppb-Level H2S Detection

Fast Response Room Temperature Amperometric Gas Sensors with Modified Fe–N–C Electrodes for ppb-Level H2S Detection

High‐Selectivity Hydrogen Gas Sensors based on Mesoporous PbOx‐ZnO Nanocomposites

Superiorly sensitive and selective H2 sensor based on p-n heterojunction of WO3–CoO nanohybrids and its sensing mechanism

Contact Info

Product

Resources

About

Fast Response Room Temperature Amperometric Gas Sensors with Modified Fe–N–C Electrodes for ppb-Level H₂S Detection

Fast Response Room Temperature Amperometric Gas Sensors with Modified Fe–N–C Electrodes for ppb-Level H₂S Detection

High‐Selectivity Hydrogen Gas Sensors based on Mesoporous PbO_x‐ZnO Nanocomposites