Electrochemical quartz crystal microbalance study on hydrogen absorption and desorption into/from palladium and palladium–noble metal alloys

Łukaszewski, M.; Czerwiński, A.

doi:10.1016/j.jelechem.2006.01.014

Cited by 26 publications

(15 citation statements)

References 37 publications

(78 reference statements)

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“…However, extended voltammetric cycling of the Pd catalysts significantly reduces the activity of these catalysts as seen by a considerable drop in current density for ORR. This effect is in agreement with results obtained by Lukaszewski et al (17) who report high initial activity for freshly prepared Pd, but show degradation in activity over extended cycling as a result of rearrangement of Pd surface atoms due to hydrogen absorption into the Pd lattice. The study of the interaction of Pd with the carbon support and its activity for ORR is important to draw insight into the design of active Pd alloys for ORR.…”

Section: Resultssupporting

confidence: 93%

Chemical Vapor Deposition of Nanocarbon-Supported Platinum and Palladium Catalysts for Oxygen Reduction

Vijayaraghavan

Stevenson

2008

ECS Trans.

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A direct scheme for the synthesis of carbon nanotube (CNT) supported Pt and Pd catalysts is reported. Pt and Pd nanocatalysts deposited on nitrogen doped CNTs (NCNTs) were prepared via metal organic chemical vapor deposition (MOCVD) using thermally labile metal organic precursors. These materials were characterized by a host of techniques including TEM, XPS, TGA and voltammetry. The MOCVD based synthetic route offers several advantages including the circumvention of a majority of processing steps that are normally required to disperse and activate such catalysts on carbon supports. The low temperature dispersion and loading of catalysts also allows for study of the synergistic role of the carbon support on the oxygen reduction reaction (ORR). The activity of NCNT supported Pt catalysts for ORR was comparable to Pt/ Vulcan catalysts. Results from preliminary experiments and prospects for extending the MOCVD synthesis route for preparing viable carbon supported catalysts for ORR are discussed.

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Section: Resultssupporting

confidence: 93%

Chemical Vapor Deposition of Nanocarbon-Supported Platinum and Palladium Catalysts for Oxygen Reduction

Vijayaraghavan

Stevenson

2008

ECS Trans.

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“…This is possible because of the slow scan rate applied and the small electrode thickness. The advantages of the use of limited volume electrodes in the studies on hydrogen absorption in Pd-based materials have been demonstrated in our earlier works [20][21][22][23][24][25][26][27][28].…”

Section: Methodsmentioning

confidence: 99%

Kinetics and mechanism of hydrogen electrosorption in palladium-based alloys

et al. 2011

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“…Therefore, combining electrochemistry with an additional characterization or analysis tool is an often necessary and very useful way to obtain more and complementary information about processes occurring on or inside the electrode, and about its state. For this purpose, numerous techniques complementing electrochemistry have been demonstrated, including mass spectrometry (MS), [1][2][3] quartz crystal microbalance (QCM), [4][5][6][7] optical techniques like vibrational spectroscopy, 8 infrared transmittance and reflectance spectroscopy, 9 ellipsometry, 10 optical microscopy, 11,12 and synchrotron based X-ray spectroscopy. 13 All these methods have in common that they rely on relatively advanced experimental setups and -where applicable -complex optics in order to obtain signals with a satisfying signal-to-noise ratio and resolution.…”

Section: Introductionmentioning

confidence: 99%

Depth probing of the hydride formation process in thin Pd films by combined electrochemistry and fiber optics-based in situ UV/vis spectroscopy

Wickman

Fredriksson

Feng

et al. 2015

Phys. Chem. Chem. Phys.

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We demonstrate a flexible combined electrochemistry and fiber optics-based in situ UV/vis spectroscopy setup to gain insight into the depth evolution of electrochemical hydride and oxide formation in Pd films with thicknesses of 20 and 100 nm. The thicknesses of our model systems are chosen such that the films are thinner or significantly thicker than the optical skin depth of Pd to create two distinctly different situations. Low power white light is irradiated on the sample and analyzed in three different configurations; transmittance through, and, reflectance from the front and the back side of the film. The obtained optical sensitivities correspond to fractions of a monolayer of adsorbed or absorbed hydrogen (H) and oxygen (O) on Pd. Moreover, a combined simultaneous readout obtained from the different optical measurement configurations provides mechanistic insights into the depth-evolution of the studied hydrogenation and oxidation processes.

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Electrochemical quartz crystal microbalance study on hydrogen absorption and desorption into/from palladium and palladium–noble metal alloys

Cited by 26 publications

References 37 publications

Chemical Vapor Deposition of Nanocarbon-Supported Platinum and Palladium Catalysts for Oxygen Reduction

Chemical Vapor Deposition of Nanocarbon-Supported Platinum and Palladium Catalysts for Oxygen Reduction

Kinetics and mechanism of hydrogen electrosorption in palladium-based alloys

Depth probing of the hydride formation process in thin Pd films by combined electrochemistry and fiber optics-based in situ UV/vis spectroscopy

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