The mechanism of the evolution of hydrogen on palladium and associated internal damage phenomena

Bockris, J. O'm.

doi:10.1016/s0360-3199(99)00069-5

Cited by 16 publications

(8 citation statements)

References 14 publications

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“…1 Many catalysts had been tested as electrode materials for efficient H 2 production. [2][3][4][5][6][7][8] Most of the noble metals 2,7,[9][10][11][12][13][14][15][16][17] and in particular Pt were the best choice of materials, because of their high electrocatalytic effect and low overpotential for hydrogen evolution reaction (HER) in acidic medium. 15,18 On the basis of the nature of interaction between hydrogen and storage material, the storage materials were categorized into 2 types: chemisorption, in which the hydrogen atoms chemically bond with the storage material that stores and releases hydrogen under specific conditions, 19,20 and physisorption, in which the hydrogen molecules bond on the surface of the material through weak physical interaction without any change in the sorbent material.…”

Section: Introductionmentioning

confidence: 99%

Storage and evolution of hydrogen in acidic medium by polyaniline

et al. 2017

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Summary Emeraldine salt of polyaniline‐coated copper substrate was used as a cathode to study hydrogen evolution reaction in 1M H2SO4. Hydrogen evolution reaction in acidic medium followed Grotthus mechanism, where proton hops randomly on the surface of polyaniline. With Randles‐Sevcik equation, the average value of diffusion coefficient for H+ on polyaniline was calculated to be 2.66 times higher than that in the literature data. This higher value explicitly supported the rapid diffusion of H+ on polyaniline surface from the bulk electrolyte solution. With the help of a phenomenological thermodynamic approach demonstrated elsewhere, the solvent‐modified work function of polyaniline‐coated copper in acidic medium was calculated. The plot of exchange current density versus solvent‐modified work function of different metals and polyaniline‐coated copper indicated that at lower work function polyaniline‐coated copper showed higher exchange current density and the rate of hydrogen evolution was much higher on polyaniline‐coated copper than on copper. This was further confirmed by gas chromatography, and 13C and 1H nuclear magnetic resonance studies supported the mechanism proposed. From linear sweep voltammetry analysis, it was observed that the total capacity of hydrogen stored on polyaniline‐coated copper was approximately 1.85 times higher than that on copper.

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Section: Introductionmentioning

confidence: 99%

Storage and evolution of hydrogen in acidic medium by polyaniline

et al. 2017

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“…The Pd/H and metal/H systems have been extensively studied in physics, chemistry, engineering, energy, and hydrogen technology fields due to the possibility of cold fusions [7][8][9]. However, electrochemical phenomena at Pd/aqueous solution interfaces have been extensively studied in electrochemistry and hydrogen technologies regardless of the cold fusions [1][2][3][4][5][6][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The phase-shift method and correlation constants for determining adsorption isotherms of hydrogen at a palladium electrode interface

Chun

Jeon

Chun

2007

International Journal of Hydrogen Energy

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“…5 A concern with developing palladium-based electrocatalysts for hydrogen evolution reaction (HER) is the possible surface damage during the adsorption of hydrogen, which makes the catalyst unstable and degradable. 1,6,7 Strategies to subdue this issue are the tethering of the palladium to inert supports, 6 impregnation in carbon composites possibly through in situ doping method, and preparing their coordination/organometallic derivatives.…”

Section: Introductionmentioning

confidence: 99%

“…Efforts have been made to replace platinum electrocatalysts with non-noble metal-based catalysts, less expensive noble metal-based catalysts, metal free catalysts, and so forth. , Among others, the development of palladium-based electrocatalysts is scarce despite possessing striking similarities to platinum . A concern with developing palladium-based electrocatalysts for hydrogen evolution reaction (HER) is the possible surface damage during the adsorption of hydrogen, which makes the catalyst unstable and degradable. ,, Strategies to subdue this issue are the tethering of the palladium to inert supports, impregnation in carbon composites possibly through in situ doping method, and preparing their coordination/organometallic derivatives.…”

Section: Introductionmentioning

confidence: 99%

Palladium(II)–N-Heterocyclic Carbene Complex-Based Electrocatalysts for Hydrogen Evolution Reaction

et al. 2023

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The growing interest in the hydrogen economy demands for the sustainable and efficient production pathways from renewable sources. Among the arrays available, electrochemical hydrogen evolution reaction (HER) is considered as an efficient and sustainable approach for proton reduction to produce green hydrogen gas from water. The current work employs the construction of electrocatalysts developed from carbon composites of palladium(II) complexes derived from functionalized N-heterocyclic carbenes (NHCs). The developed electrocatalysts are studied for their HER performance in an acidic medium using a rotating ring disk electrode setup, displaying an overpotential as low as −449 mV versus reversible hydrogen electrode (RHE) with an onset potential of −240 mV versus RHE. The palladium complex-based carbon composites demonstrated improved charge transfer resistance (55–68 Ω) than that of palladium–NHC complexes (65–80 Ω). The confirmation of HER was investigated by hydrogen oxidation reaction enabled by the ring electrode. The developed electrocatalysts exhibit excellent stability for up to 10 h with minimal decrease in efficiency, as indicated by the post-stability linear sweep voltammogram. The post-HER analysis of the electrocatalysts indicates the structural and molecular intactness.

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The mechanism of the evolution of hydrogen on palladium and associated internal damage phenomena

Cited by 16 publications

References 14 publications

Storage and evolution of hydrogen in acidic medium by polyaniline

Storage and evolution of hydrogen in acidic medium by polyaniline

The phase-shift method and correlation constants for determining adsorption isotherms of hydrogen at a palladium electrode interface

Palladium(II)–N-Heterocyclic Carbene Complex-Based Electrocatalysts for Hydrogen Evolution Reaction

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