Nanostructures of Pd–Ni alloy deposited on carbon fibers for sensing hydrogen

Ou, Yu; Si, Weiwei; Yu, Gang; Tang, Lili; Zhang, J.; Dong, Qizhi

doi:10.1016/j.jallcom.2013.03.180

Cited by 24 publications

(12 citation statements)

References 37 publications

(45 reference statements)

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“…In sharp contrast to a previous report [22], the maximum response of the sensor increased almost linearly with the increasing test temperature. It is believed that the chemical adsorption of the hydrogen, which is more dependent on the driving force other than the physical adsorption, could be significantly facilitated with increasing temperature and lead to metal hydride formation with volume expansion [20,23]. Although the formation of the hydride would lead to the increase of the resistance, it is subordinate compared with the increment and shortening of the conduction pathway inside the synthesized nanostructure.…”

Section: Resultsmentioning

confidence: 99%

“…The response of the synthesized nanostructure increases quickly during the first dozen of minutes of the exposure to H 2 , and reaches saturation after about 15 min. Since nitrogen was used as the desorption gas, the recovery of the sensor is relatively slow [20,23]. The linear correlation between the response and the square root of H 2 concentration shown in Figure 8b might be related to the adsorption process of Pd NPs according to the Sievert’s law [24].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Flexible and Highly Sensitive Hydrogen Sensor Based on Organic Nanofibers Decorated by Pd Nanoparticles

Jiang¹,

Yu²,

Zhang³

et al. 2019

Sensors

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A highly sensitive and flexible hydrogen sensor based on organic nanofibers decorated by Pd nanoparticles (NPs) was designed and fabricated for low-concentration hydrogen detection. Pd NPs were deposited on organic nanofiber materials by DC magnetron sputtering. The temperature dependence of the sensitivity at 25 ppm H2 was characterized and discussed, and the maximum response of the sensor increased linearly with increasing measurement temperature. Performances of the hydrogen sensor were investigated with hydrogen concentration ranging from 5 ppm to 50 ppm. This sensor exhibits high sensitivity, with the response up to 6.55% for H2 as low as 5 ppm, and the output response of the hydrogen sensor increased linearly with the square root of hydrogen concentration. A cycling test between pure nitrogen and 25 ppm hydrogen concentration was performed, and the hydrogen sensor exhibited excellent consistency.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Flexible and Highly Sensitive Hydrogen Sensor Based on Organic Nanofibers Decorated by Pd Nanoparticles

Jiang¹,

Yu²,

Zhang³

et al. 2019

Sensors

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“…As seen in Table 2, the literature provides several examples of such structures. Pd-Ni nanoparticles have been widely investigated [78,79,80,81] because the addition of Ni was found to induce a large change on the α- β phase transition behavior [79,81], reduce the hysteresis behavior of the Pd NPs [78] and hence enhance the performances of nanoparticle-based sensors. Phan et al [78] reported a limit of detection lower than 10 ppm for Pd-Ni alloy NPs supported by graphene with a better sensor response at this H 2 concentration range when compared to the use of pure Pd NPs at room temperature.…”

Section: Review Of Palladium-based Hydrogen Sensorsmentioning

confidence: 99%

Recent Advances in Palladium Nanoparticles-Based Hydrogen Sensors for Leak Detection

Ndaya

Javahiraly

Brioude

2019

Sensors

113

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Along with the development of hydrogen as a sustainable energy carrier, it is imperative to develop very rapid and sensitive hydrogen leaks sensors due to the highly explosive and flammable character of this gas. For this purpose, palladium-based materials are being widely investigated by research teams because of the high affinity between this metal and hydrogen. Furthermore, nanostructured palladium may provide improved sensing performances compared to the use of bulk palladium. This arises from a higher effective surface available for interaction of palladium with the hydrogen gas molecules. Several works taking advantage of palladium nanostructures properties for hydrogen sensing applications have been published. This paper reviews the recent advances reported in the literature in this scope. The electrical and optical detection techniques, most common ones, are investigated and less common techniques such as gasochromic and surface wave acoustic sensors are also addressed. Here, the sensor performances are mostly evaluated by considering their response time and limit of detection.

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“…It is reported that Ni plays a significant role in improving the performance of hydrogen separation membranes [14] and H 2 sensors [15]. Switchable mirrors based on Mg-Ni alloy thin films capped with Pd-Ni alloy catalytic thin films were prepared by a direct-current (DC) magnetron sputtering method.…”

Section: Introductionmentioning

confidence: 99%

Optical switching properties of Pd-Ni thin-film top-capped switchable mirrors

et al. 2015

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Switchable mirrors based on magnesium--nickel alloy thin films capped with catalytic Pd--Ni alloy thin films were prepared by a DC magnetron sputtering method. Their composition, structure and surface morphology were studied by XPS, XRD and AFM. Herein, the optical switching properties and durability of the switchable mirrors were investigated by varying the Ni content in the Pd--Ni alloys. Comparing pure Pd catalyst with Pd--Ni top-capped switchable mirrors, the latter show better hydrogenation and dehydrogenation kinetics, and the speed of hydrogen desorption is obviously improved with increasing Ni content in the Pd--Ni alloy. The Pd--Ni capped switchable mirrors also have better optical switching durability. The catalytic Pd layer with the addition of Ni does not influence the transmittance (hydride state) and reflectance (metallic state) of the switchable mirrors. In addition, replacing Pd with Pd--Ni alloy decreases the cost of the switchable mirrors: employing nickel in the alloy Pd 89.2 Ni 10.8 can save about 11% use of Pd. Therefore, the Pd--Ni alloy can provide a cheaper catalytic thin film, and it is expected to have applications in energy-saving windows, hydrogen sensors and hydrogen storage materials.

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Nanostructures of Pd–Ni alloy deposited on carbon fibers for sensing hydrogen

Cited by 24 publications

References 37 publications

Flexible and Highly Sensitive Hydrogen Sensor Based on Organic Nanofibers Decorated by Pd Nanoparticles

Flexible and Highly Sensitive Hydrogen Sensor Based on Organic Nanofibers Decorated by Pd Nanoparticles

Recent Advances in Palladium Nanoparticles-Based Hydrogen Sensors for Leak Detection

Optical switching properties of Pd-Ni thin-film top-capped switchable mirrors

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