Hydrogen absorption by Pd-coated ZrNi prepared by using Barrel-Sputtering System

Hara, Masanori; Hatano, Yuji; Abe, Takayuki; Watanabe, Kuniaki; Naitoh, T; Ikeno, Susumu; Honda, Yuji

doi:10.1016/s0022-3115(03)00189-2

Cited by 40 publications

(21 citation statements)

References 16 publications

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“…In order to understand whether Pd on the surface of MgNi causes significant increase in hydrogen absorption ability, a Pd-layer was prepared on the surface of MgNi powder by Barrel Sputtering Technique [23]. Two grams of MgNi were put on the inner wall of the barrel installed in the sputtering chamber and the chamber was evacuated below 1 × 10 −4 Pa at room temperature.…”

Section: Discussionmentioning

confidence: 99%

Effects of Pd addition on electrochemical properties of MgNi

Hatano

Abe

et al. 2004

Journal of Alloys and Compounds

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Two kinds of Pd-modified MgNi were prepared and effects of Pd addition on the electrochemical properties of MgNi were investigated. Sample I was prepared by ball-milling amorphous MgNi with Pd (1, 6 and 10 mol%) for 10 min, 2 and 10 h, and sample II was obtained by ball-milling Mg 2 Ni and Ni with 10 mol% Pd for 80 h. The effects of Pd-modification for sample I depended on both Pd ratio and time of ball-milling. During the ball-milling, Pd became amorphous and distributed rather uniformly not only on the surface but also in the bulk of MgNi powder. At 6 and 10 mol% Pd, the degradation of discharge capacity of MgNi was significantly decreased. As for sample II, the cycle life was remarkably improved by the Pd-modification. Analyses of the roles of Pd on the behavior of MgNi showed that the improvements of MgNi properties by both Pd-modifications were not due to the increase in hydrogen absorption ability but caused by the suppression of Mg(OH) 2 formation.

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Section: Discussionmentioning

confidence: 99%

Effects of Pd addition on electrochemical properties of MgNi

Hatano

Abe

et al. 2004

Journal of Alloys and Compounds

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“…We have recently developed polyhedral-barrel sputtering system that can be used to modify fine particle surfaces with a metal or alloy in a dry process [10][11][12]. Compared with wet processes such as plating, sputtering has the advantages of being less prone to infiltration of impurities, offering a wider range of choices of modification materials, and carrying a lower environmental burden.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Fine Particles with a SnO2 Film by Using a Polyhedral-Barrel Sputtering System

Abe

Higashide

Inoue

et al. 2007

Plasma Chem Plasma Process

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Fine particles were modified with a thin film of SnO 2 by using a barrel sputtering system that is a dry process. The conditions for the preparation of SnO 2 were studied by reactive sputtering onto a glass plate substrate. The optimal conditions for the preparation of tetragonal SnO 2 were identified as 60% partial oxygen pressure and 1.0 Pa total gas pressure with the substrate at room temperature. Under the optimized conditions, the surfaces of Al flake particles were modified with a thin film of SnO 2 . XRD and SEM/EDS analysis of the prepared samples showed that the Al particle surfaces were uniformly modified by a thin film of SnO 2 in all cases. The film thicknesses were 80, 130, and 180 nm at RF outputs of 195, 350, and 490 W. These measured thicknesses coincided with the values estimated from the interference colors of the samples.

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“…Pd's ability to absorb a large volume of hydrogen was first reported more than 150 years ago by Thomas Graham in 1866 [13], which built the foundation for modern MH research work [14][15][16]. In addition to use as a pure material, Pd also participates in H-storage research in many ways, such as a main ingredient in Pd-based alloys [17][18][19][20], an additive in the form of a nanotube [21], nanoparticle [22][23][24][25], or polycrystalline powder [26,27], a component in Pd [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42] and Pd-containing thin films [43][44][45][46], and an alloying ingredient . The major results accomplished by incorporating Pd in MH alloys are summarized in Table 1, and consist mainly of improvements in gaseous hydrogen absorption and desorption kinetics, electrochemical discharge capacity, high-rate dischargeability (HRD), activation, and cycle life performance in several MH alloy systems, including Mg, C, A 2 B, AB, AB 2 , AB 5 , and body-centered-cubic solid solutions.…”

Section: Introductionmentioning

confidence: 99%

Increase in the Surface Catalytic Ability by Addition of Palladium in C14 Metal Hydride Alloy

Kim

Ouchi²,

Nei³

et al. 2017

Batteries

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A combination of analytic tools and electrochemical testing was employed to study the contributions of Palladium (Pd) in a Zr-based AB 2 metal hydride alloy (Ti 12 Zr 22.8 V 10 Cr 7.5 Mn 8.1 Co 7 Ni 32.2 Al 0.4 ). Pd enters the A-site of both the C14 and C15 Laves phases and shrinks the unit cell volumes, which results in a decrease of both gaseous phase and electrochemical hydrogen storage capacities. On the other hand, the addition of Pd benefits both the bulk transport of hydrogen and the surface electrochemical reaction. Improvements in high-rate dischargeability and low-temperature performances are solely due to an increase in surface catalytic ability. Addition of Pd also decreases the surface reactive area, but such properties can be mediated through incorporation of additional modifications with rare earth elements. A review of Pd-addition to other hydrogen storage materials is also included.

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Hydrogen absorption by Pd-coated ZrNi prepared by using Barrel-Sputtering System

Cited by 40 publications

References 16 publications

Effects of Pd addition on electrochemical properties of MgNi

Effects of Pd addition on electrochemical properties of MgNi

Surface Modification of Fine Particles with a SnO2 Film by Using a Polyhedral-Barrel Sputtering System

Increase in the Surface Catalytic Ability by Addition of Palladium in C14 Metal Hydride Alloy

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