Model on hydride formation describing surface control, diffusion control and transition regions

Schweppe, Florian; Martin, M.; Fromm, E.

doi:10.1016/s0925-8388(97)00192-8

Cited by 42 publications

(20 citation statements)

References 9 publications

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“…For in-depth treatment, the interested reader can consult various references [106][107][108][109][110][111][112][113][114][115][116][117] and the classic book of Christian [118].…”

Section: Hydrogenation Kineticsmentioning

confidence: 99%

Metal Hydrides

Huot

2010

Handbook of Hydrogen Storage

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Metal hydrides are promising candidates for many stationary and mobile hydrogen storage applications. Presently, the most common use of metal hydrides is as anode material in commercial nickel-metal hydrides (Ni-MH) rechargeable batteries which have replaced conventional nickel-cadmium batteries in many applications. A wide variety of Ni-MH batteries are now on the market with cell sizes ranging from 30 mAh to 250 Ah [1,2]. Some other applications are: hydrogen compression [3], aircraft fire-detectors [4], isotope separation [5], and hydrogen getters for microelectronic packages. Hydride formation is also used in the HDDR process (hydrogenation-disproportionation-desorption-recombination) for the synthesis of magnetic materials such as Nd 2 Fe 14 B [6]. A striking application is as a component of cryocoolers for the ESA Planck mission [7]. Another exciting new application is the use of metal hydrides for switchable mirrors [8]. As we can see, metal hydrides have a wide range of applications. However, most research and development is targeted towards two applications: batteries and hydrogen storage. The former is now widely exploited but the latter is still facing many technical problems. The main advantages of storing hydrogen in a metal hydride are the high hydrogen volumetric densities (sometimes higher than in liquid hydrogen) and the possibility to absorb and desorb hydrogen with a small change in hydrogen pressure [9].The physics of hydrogen in elemental metals was reviewed at the end of the 1970s in thebooksHydrogeninMetals,volumesIandII [10,11].The1970s alsosawtheemergence of the important field of intermetallic compounds as hydride materials. An in-depth review of this field can be found in Hydrogen in Intermetallic Compounds volumes I, and II [12,13]. A review of the propertiesand applications of hydrogen in metals can befound in the third volume of Hydrogen in Metals [14]. The basic properties of the metal-hydrogen system are discussed from a fundamental point of view by Fukai [15]. Although initial studies on nanocrystalline and amorphous metal hydrides were initiated around the 1980s [16], the real emergence of nanocrystalline metal hydrides as a new class of Handbook of Hydrogen Storage. Edited by Michael Hirscher

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“…For in-depth treatment, the interested reader can consult various references [106][107][108][109][110][111][112][113][114][115][116][117] and the classic book of Christian [118].…”

Section: Hydrogenation Kineticsmentioning

confidence: 99%

Metal Hydrides

Huot

2010

Handbook of Hydrogen Storage

View full text Add to dashboard Cite

show abstract

“…According to Fromm [20], the overall reaction of hydride formation is composed of several partial steps:…”

Section: Rate-determining Process For Absorption/desorptionmentioning

confidence: 99%

“…In these steps, steps 1 and 2 are unlikely to be the ratedetermining step, because the activation energy for these two steps is small, and they can get to equilibrium readily [20].…”

Section: Rate-determining Process For Absorption/desorptionmentioning

confidence: 99%

Increased performance of hydrogen storage by Pd-treated LaNi4.7Al0.3, CaNi5 and Mg2Ni

Payer

Wainright

2006

Journal of Alloys and Compounds

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“…When the methanol concentration is more than 75 mmol L −1 , a sharp decrease of the response current can be observed, which is probably due to the transition of the electrode process from a mass-transport controlled to a surface-reaction controlled process [34,36]. The peak oxidation current tends to saturate, and the aforementioned linear fitting result is no longer applicable.…”

Section: Methanol Sensing With Cyclic Voltammetrymentioning

confidence: 96%