Micro-wrinkled palladium surface for hydrogen sensing and switched detection of lower flammability limit

Greco, Francesco; Ventrelli, Letizia; Dario, P.; Mazzolai, Barbara; Mattoli, Virgilio

doi:10.1016/j.ijhydene.2012.04.145

Cited by 33 publications

(33 citation statements)

References 22 publications

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“…The concentration‐resolved measurements were also taken using air as the carrier gas. Because the flammability threshold for hydrogen in air is 4% H 2 , for safety reasons these measurements carried out only for H 2 concentrations below or equal to 3%. The results of those measurements are shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Nanopatterning‐Enhanced Sensitivity and Response Time of Dynamic Palladium/Cobalt/Palladium Hydrogen Gas Sensors

Lueng

Lupo

Metaxas

et al. 2016

Adv Materials Technologies

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Clear advantages of nanopatterned Pd/Co fi lms over continuous Pd/Co fi lms are demonstrated as candidates for future hydrogen gas sensing devices based upon hydrogen-absorption-modifi ed ferromagnetic resonance. Nanopatterning results in a higher sensitivity to hydrogen gas and a much faster hydrogen desorption rate. It also avoids the need for an external biasing magnetic fi eld which may be important for practical sensor implementation. A wide range of hydrogen gas concentrations has been detected with the nanopatterned material: from 0.1% to 50%, across the threshold of hydrogen fl ammability in air (4%).

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Section: Resultsmentioning

confidence: 99%

Nanopatterning‐Enhanced Sensitivity and Response Time of Dynamic Palladium/Cobalt/Palladium Hydrogen Gas Sensors

Lueng

Lupo

Metaxas

et al. 2016

Adv Materials Technologies

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“…Efficient hydrogen sensing was achieved by using standard optical fibres (like G652 fibres used for telecommunications) with (i) Pd films deposited on the fibre cross-section [40] (ii) laid around the fibre [39,41]; (iii) around the core [42] or (iv) around tapered fibre [43]. However, these sensors are mainly dedicated to local gas detection, and they suffer from untimely deterioration in harsh environments and poor robustness [44]. They are mainly dedicated to local gas detection only.…”

Section: Methodsmentioning

confidence: 99%

France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes

Delépine-Lesoille

Girard

Landolt

et al. 2017

Sensors

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This paper presents the state of the art distributed sensing systems, based on optical fibres, developed and qualified for the French Cigéo project, the underground repository for high level and intermediate level long-lived radioactive wastes. Four main parameters, namely strain, temperature, radiation and hydrogen concentration are currently investigated by optical fibre sensors, as well as the tolerances of selected technologies to the unique constraints of the Cigéo’s severe environment. Using fluorine-doped silica optical fibre surrounded by a carbon layer and polyimide coating, it is possible to exploit its Raman, Brillouin and Rayleigh scattering signatures to achieve the distributed sensing of the temperature and the strain inside the repository cells of radioactive wastes. Regarding the dose measurement, promising solutions are proposed based on Radiation Induced Attenuation (RIA) responses of sensitive fibres such as the P-doped ones. While for hydrogen measurements, the potential of specialty optical fibres with Pd particles embedded in their silica matrix is currently studied for this gas monitoring through its impact on the fibre Brillouin signature evolution.

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“…Optical fiber sensors are able to detect H 2 under harsh and explosive conditions, however, most fiber optic sensors are based on a deposit of a thin layer of sensitive material on the surface of the fiber. This configuration limits the sensor robustness and causes stability issues related to the degradation of the film after several exposure cycles [11]. To overcome this problem, we propose an optical fiber composed of a sensitive material (Palladium, Pd) integrated into the silica cladding in order to protect the sensing metal from harsh environments.…”

Section: Introductionmentioning

confidence: 99%

Impact of H₂ gas on disruptive birefringence optical fibers with embedded Palladium particles for developing robust sensors

et al. 2019

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Optical fiber sensors of hydrogen gas (H 2 ) are conventionally based on the reaction of a sensitive material deposited on the surface of a fiber. Long-term applications of H 2 monitoring require more robust configurations, less sensitive to the degradations of the sensitive layer. To overcome this issue, we develop disruptive polarisation-maintaining optical fibers composed of a sensitive material (Palladium, Pd) integrated into the silica cladding. We present the development of two Panda-type optical fibers with or without embedded Pd particles. These fibers have been fabricated for evaluating, through the measurement of the birefringence, the contribution of Pd particles on the detection of H 2 gas. We have specially developed a gas chamber for measuring on-line the detection of H 2 during its diffusion into the fiber. Dynamic comparisons between both fibers demonstrate the contribution of Pd particles resulting in a faster response time (of about 20 h for our experimental conditions). These results pave the way to the realization of robust optical fibers with enhanced sensitivity to H 2 gas for developing sensing systems compatible with long-term hydrogen monitoring applications in extreme and harsh environments, such as radioactive waste repositories.

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Micro-wrinkled palladium surface for hydrogen sensing and switched detection of lower flammability limit

Cited by 33 publications

References 22 publications

Nanopatterning‐Enhanced Sensitivity and Response Time of Dynamic Palladium/Cobalt/Palladium Hydrogen Gas Sensors

Nanopatterning‐Enhanced Sensitivity and Response Time of Dynamic Palladium/Cobalt/Palladium Hydrogen Gas Sensors

France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes

Impact of H₂ gas on disruptive birefringence optical fibers with embedded Palladium particles for developing robust sensors

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Micro-wrinkled palladium surface for hydrogen sensing and switched detection of lower flammability limit

Cited by 33 publications

References 22 publications

Nanopatterning‐Enhanced Sensitivity and Response Time of Dynamic Palladium/Cobalt/Palladium Hydrogen Gas Sensors

Nanopatterning‐Enhanced Sensitivity and Response Time of Dynamic Palladium/Cobalt/Palladium Hydrogen Gas Sensors

France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes

Impact of H2 gas on disruptive birefringence optical fibers with embedded Palladium particles for developing robust sensors

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Impact of H₂ gas on disruptive birefringence optical fibers with embedded Palladium particles for developing robust sensors