The effect of aging on the diffusivity of hydrogen in amorphous NiSiB alloy

Hara, Mitsuhiro; Latanision, R. M.

doi:10.1016/0010-938x(94)00152-v

Cited by 8 publications

(1 citation statement)

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“…19 On the other hand, the diffusion constant of interstitial hydrogen atoms for Ni-based alloys is several orders of magnitude smaller, about 1.0 ϫ 10 Ϫ11 cm 2 /s. 20,21 It follows that the oxidation of absorbed hydrogen is most probably limited by the diffusion of absorbed hydrogen from the solid bulk to the electrode surface. Under the assumption of a very fast electron transfer process, the rate of hydrogen oxidation can thus be expressed using the Cottrell equation 10…”

Section: Resultsmentioning

confidence: 99%

Electrocatalytic Properties of Ni-Based Alloys Toward Hydrogen Evolution Reaction in Acid Media

Lu¹,

Evans²,

Zangari³

2003

J. Electrochem. Soc.

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The electrocatalytic performance toward the hydrogen evolution reaction ͑HER͒ of a series of Ni-based alloys prepared by electroless deposition was studied by means of linear polarization, cyclic voltammetry, and potential step techniques. Ni-W-P and Ni-Mo-P alloy electrodes exhibit good electrocatalytic activity toward HERs, with some Ni-Mo-P alloys approaching the performance of Pt foils. The electrocatalytic activity of Ni-based alloys decreases with increasing P content but increases with increasing content of W or Mo. The experimental results can be interpreted in terms of a pronounced synergy between Ni, which has internally paired d electrons, and W or Mo, which have empty or half-filled d orbitals and therefore, bind hydrogen atoms strongly. The absorption of hydrogen in these alloys is also found to have an important effect on their activity. Electrodes with higher activity are capable to incorporate larger amounts of hydrogen during cathodic charging.

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Section: Resultsmentioning

confidence: 99%