The insertion/extraction of deuterium (hydrogen) at Pd sheet electrodes in D2O(H2O) + LiOD(LiOH) electrolyte

Mengoli, G.; Bernardini, M.; Fabrizio, M.; Manduchi, C.; Zannoni, G.

doi:10.1016/0022-0728(95)04319-5

Cited by 11 publications

(9 citation statements)

References 12 publications

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“…It is known that the hydrogen diffusion coefficient in Pd and Pd alloys increases with an increase in the amount of absorbed hydrogen, being greater in the b-phase than in the a-phase [41,69,70]. However, monotonic changes in the hydrogen diffusion coefficient during further saturation of the b-phase cannot be responsible for the observed peak-like dependence of absorption/desorption time on potential.…”

Section: Chronoamperometric Studies Performed On Fresh Pdpt-rh Alloysmentioning

confidence: 82%

Hydrogen electrosorption in Pd–Pt–Rh alloys

Łukaszewski¹,

Grdeń²,

Czerwiński³

2004

Journal of Electroanalytical Chemistry

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The process of hydrogen electrosorption in thin Pd-Pt-Rh alloys has been investigated mainly in acidic solution using cyclic voltammetry and chronoamperometry. The influence of electrode potential on the amount of electrosorbed hydrogen is presented. On the plot of H/M (hydrogen atoms/metal atoms) vs. potential the regions of pure a-and b-phase existence as well as the region of a-b phase transition can be distinguished. The maximum amount of absorbed hydrogen depends on the bulk composition being relatively high for Pd-rich alloys, although smaller than for pure Pd. The a-b transition is shifted to lower potentials in comparison with pure Pd. The process of phase transition seems to control the rate of hydrogen absorption and desorption into/from thin Pd-based electrodes. The hysteresis effect is observed in chronoamperometric absorption and desorption experiments. Potential cycling of PdPt-Rh alloys through the oxygen region leads to significant changes in hydrogen absorption properties with the appearance of an additional bulk phase.

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Section: Chronoamperometric Studies Performed On Fresh Pdpt-rh Alloysmentioning

confidence: 82%

Hydrogen electrosorption in Pd–Pt–Rh alloys

Łukaszewski¹,

Grdeń²,

Czerwiński³

2004

Journal of Electroanalytical Chemistry

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“…The recent DFT calculations as well as experimental findings also suggest that the most favorable surface site for atomic/molecular group adsorption on the Pd(1 1 1) surface is the FCC site in comparison to the other surface sites; HCP, ONTOP and BRIDGE sites [37][38][39][40]. Although, the actual interaction of the hydrogen atom with the mixed electronic states of palladium metal is still unclear but due to a large electro-negativity difference of H and Pd-surface, the H atom seems to preserve its protonic character on the palladium surface [41]. Consequently, the Pd surfaces are well known for under-potential deposition of hydrogen during the acidic electrolysis and that implies presence of a strong interaction amongst the hydrogen and the Pd surface [42].…”

Section: Introductionmentioning

confidence: 91%

Hydrogen oxidation reaction on Pd(111) electrode in alkaline media: Ab-initio DFT study of OH effects

Mazher

Al-Odail

2015

Computational and Theoretical Chemistry

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“…The deposition of palladium and palladium metallic alloys has been exploited as an alternative in order to prepare modified electrodes with improved catalytic properties [1][2][3][4][5][6][7][8][9]. A suitable method to achieve some alloys is electroless plating, where the catalytic or electrocatalytic oxidation of the reducing agent is caused by the supply of electrons available for metal cation reduction.…”

Section: Introductionmentioning

confidence: 99%