Structural and electrochemical properties of MgNi-based alloys with Ti, Pt and Pd additives

Souza, Elki Cristina de; Ticianelli, Edson A.

doi:10.1016/j.ijhydene.2007.07.024

Cited by 42 publications

(21 citation statements)

References 19 publications

(25 reference statements)

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“…However, its slow kinetics and high operating temperature (>573 K) limits its practical use. Many methods such as adding catalyst, decreasing crystallinity and particle size by mechanical milling have been developed to improve the hydrogen sorption kinetics [13][14][15][16][17][18][19][20][21][22]. Bogdanovic prepared active Mg particles with good hydrogen storage properties by dehydrogenation of MgH 2 from hydriding Mg based organometallic compounds [23,24].…”

Section: Introductionmentioning

confidence: 99%

Catalytic effect of Ni nanoparticles on the desorption kinetics of MgH2 nanoparticles

Xie

Liu

Zhang

et al. 2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Catalytic effect of Ni nanoparticles on the desorption kinetics of MgH2 nanoparticles

Xie

Liu

Zhang

et al. 2009

Journal of Alloys and Compounds

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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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“…Titanium was proved to be an important corrosion resistance element to replace Mg by forming a protective layer to prevent the oxidation of active materials. Considering the two reasons, researchers [9][10] are focusing on preparing Ti-containing Mg-based composites and Ti partial substitution alloys by MA. However, studies on element addition to MgNi alloy to form a solid solution, rather than replacing every element of the pure alloy, are relatively few [11].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characteristics of amorphous MgTi x Ni (x = 0, 0.1, and 0.2) hydrogen storage alloys

et al. 2010

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MgTi x Ni (x = 0, 0.1, and 0.2) alloys were successfully prepared by mechanical alloying (MA), and the influence of milling time on the electrochemical characteristics of the electrodes was discussed. MgTi x Ni alloys after 90 h milling displayed the best electrochemical performance. The X-ray diffraction patterns showed that the alloy ball-milled for 90 h was amorphous with a widened diffraction peak. The charge-discharge tests indicated that these alloys had good electrochemical activation properties, and the MgTi 0.2 Ni alloy electrode exhibited the best cycle performance. The initial discharge capacity of the MgTi 0.2 Ni alloy reached up to 401.1 mAh·g −1 , and the retention rate of capacity was 31.0% after 30 cycles, much higher than that of MgNi (17.3%). The Tafel polarization curves revealed that Ti addition could enhance the anticorrosion performance of these alloys in alkali solution, which was responsible for the ameliorated cyclic stability of these alloy electrodes.

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Structural and electrochemical properties of MgNi-based alloys with Ti, Pt and Pd additives

Cited by 42 publications

References 19 publications

Catalytic effect of Ni nanoparticles on the desorption kinetics of MgH2 nanoparticles

Catalytic effect of Ni nanoparticles on the desorption kinetics of MgH2 nanoparticles

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

Electrochemical characteristics of amorphous MgTi x Ni (x = 0, 0.1, and 0.2) hydrogen storage alloys

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