Hydrogen gas sensing performance of Pd–Ni alloy thin films

Lee, Eunsongyi; Lee, Jun Min; Lee, Eun-Young; Noh, Jin−Seo; Joe, Jin Hyoun; Jung, Bumsuk; Lee, Wooyoung

doi:10.1016/j.tsf.2010.07.122

Cited by 115 publications

(96 citation statements)

References 26 publications

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“…As a result, the current change significantly increases beyond that point and then it is almost saturated at higher H 2 concentrations. The Ni inclusion in Pd suppresses the a to b phase transition [15,16], leading to the linear response behavior over a broad H 2 range. Although this scalable response to high H 2 concentrations is desirable, the overall sensitivity of the PdeNi films appears to be greatly decreased with increasing the Ni content (see Fig.…”

Section: Resultsmentioning

confidence: 99%

Pd–Ni hydrogen sponge for highly sensitive nanogap-based hydrogen sensors

Lee

Noh

et al. 2012

International Journal of Hydrogen Energy

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Section: Resultsmentioning

confidence: 99%

Pd–Ni hydrogen sponge for highly sensitive nanogap-based hydrogen sensors

Lee

Noh

et al. 2012

International Journal of Hydrogen Energy

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“…Various efforts [7][8][9][10][11] including the use of Pd alloys and reduction of the Pd thickness have been made to suppress the a-to b-phase transition. Recently, Kim et al [12] found that a Pd film of 50-nm thick on a thermally oxidized silicon (SiO 2 /Si) substrate with a titanium (Ti) buffer layer does not have the sensitivity hysteresis at H 2 concentrations of 0.5-1.5 % observed in a film simultaneously deposited on a bare substrate.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen responses of ultrathin Pd films and nanowire networks with a Ti buffer layer

et al. 2012

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We report on hydrogen responses of ultrathin films and nanowire networks of palladium on titanium buffered silicon substrates and filtration membranes, respectively. We found that in both systems signatures such as retarding responses and saturation of the resistance changes at high hydrogen concentrations associated with the transition from Pd/H solid solution to Pd hydride diminish with decreasing the thickness of the palladium layer from 7 to 2 nm. Our results not only reveal a new way to suppress the phase transition in Pd/H system but also provide an alternative approach to achieve fast and sensitive hydrogen sensors with a wide concentration detection range.

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“…With an increase of the Ni content, the crystallinity of the samples decreases. Ni and Pd both have a face-centered cubic lattice structure, and the lattice constant of Ni (3.524 Å) is smaller than that of Pd (3.891 Å) [16]. Therefore, the more Ni substituting Pd atoms, the smaller the lattice constant of the Pd-Ni alloy.…”

Section: Structural Characterizationmentioning

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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Hydrogen gas sensing performance of Pd–Ni alloy thin films

Cited by 115 publications

References 26 publications

Pd–Ni hydrogen sponge for highly sensitive nanogap-based hydrogen sensors

Pd–Ni hydrogen sponge for highly sensitive nanogap-based hydrogen sensors

Hydrogen responses of ultrathin Pd films and nanowire networks with a Ti buffer layer

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

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