Hydrogen Adsorption, Absorption, and Desorption at Palladium Nanofilms formed on Au(111) by Electrochemical Atomic Layer Deposition (E-ALD): Studies using Voltammetry and In Situ Scanning Tunneling Microscopy

Sheridan, Leah B.; Kim, Youn-Geun; Perdue, Brian; Jagannathan, Kaushik; Stickney, John L.; Robinson, David B.

doi:10.1021/jp404723a

Cited by 24 publications

(37 citation statements)

References 88 publications

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“…EC-STM images after one, two, and three cycles revealed monatomic steps and steady morphology development with multiple cycles, indicating a layer-by-layer growth mode. The linear relationship between Pd coverage and cycle number ascertained the layer-by-layer growth operating for nanofilms deposited with up to 30 cycles [85]. These results appeared superior to those of Pd deposited by conventional electrodeposition, in which Kolb et al observed 3D growth after the bulk electrodeposition of 3 MLs of Pd on Au (111).…”

Section: Pd and Ru Depositionmentioning

confidence: 90%

“…In an application of the optimization effort discussed in the previous paragraphs Pd nanofilms were also formed on Au (111) single crystal bead electrodes [85] with SLRR where Cu UPD was used as a sacrificial metal in the presence of the chloride complex [58]. EC-STM images after one, two, and three cycles revealed monatomic steps and steady morphology development with multiple cycles, indicating a layer-by-layer growth mode.…”

Section: Pd and Ru Depositionmentioning

confidence: 99%

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Recent Advances in the Growth of Metals, Alloys, and Multilayers by Surface Limited Redox Replacement (SLRR) Based Approaches

Dimitrov

2016

Electrochimica Acta

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A B S T R A C TIn the realm of ever increasing importance of nanotechnology, the deposition of ultrathin metal/alloy layers with perfect structure and unique functionality becomes an objective of paramount importance. In the last decade many research groups have been working on the development and application of a new method for epitaxial thin film growth that employs a surface limited redox replacement (SLRR) as a building block reaction. The multiple repetition of this reaction enables the controlled deposition of a monolayer of metal or alloy per cycle. Work in the field has been done on the development of SLRR deposition protocols along with understanding and modelling of the SLRR reaction kinetics, on comparative studies of SLRR based routines, and on other deposition approaches. Most recently, the development of SLRR was extended to the application of all-electroless approaches for carrying out the SLRR (ESLRR). In this paper an overview of all SLRR, ESLRR and related approaches is presented. The description of the background and reaction formalism introduces the method with emphasis on its general applicability and limitations. The discussion then continues with the description of experimental approaches for carrying out a deposition process by SLRR. In this section specific consideration is given to the deposition by shuttling of the working electrode, the flow-cell configuration, the one-cell configuration, and the all-electroless approaches for realizing the repetitive application of a single-cycle SLRR reaction. Next, the ability of these approaches to produce epitaxial, flat and uniform deposits will be discussed through results of electrochemical, in-situ scanning tunneling microscopy, X-ray Photoelectron Spectroscopy and other characterization experiments showing advantages and limitations of SLRR growth in a variety of systems classified into three categories. In the first of these categories Cu, Ag, and Au are used as model systems to introduce the deposition by SLRR. In the second category Pd and Ru deposition by SLRR has been discussed. In the third category all studies concerning a variety of scenarios for Pt deposition by SLRR are presented and in the last part of that section deposition of alloys and multilayers is critically discussed. The paper then continues with a section presenting and discussing modelling approaches of studying the kinetics of a single-cycle SLRR reaction and concludes with the presentation of the extension of modelling to a system where multi-cycle SLRR deposition processes have been investigated. The analysis in this part focuses on the kinetic parameters of the replacement reaction like rate constant, order of the reaction, type of adsorption behavior of the sacrificial metal etc. Finally, this section concludes with a discussion of the mechanistic aspects of the SLRR reaction and more specifically on the factors impacting the deposition process and in turn the resulting structure, morphology, uniformity and continuity of the accordingly grown thin films. The paper a...

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Section: Pd and Ru Depositionmentioning

confidence: 90%

Section: Pd and Ru Depositionmentioning

confidence: 99%

Recent Advances in the Growth of Metals, Alloys, and Multilayers by Surface Limited Redox Replacement (SLRR) Based Approaches

Dimitrov

2016

Electrochimica Acta

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“…Then, the Cu-layer-coated Au nanocrystals were immersed in a deaerated 0.1 M HClO 4 + 5 mM PdCl 2 for 20 min to replace the atomic layer of Cu. Because of the surface-limiting nature of the Cu UPD, nominally one ML of Pd is deposited after one redox replacement cycle [27,28]. By repeating this procedure, multi-monolayers of Pd were obtained.…”

Section: Electrochemical Measurementmentioning

confidence: 99%

Formic Acid Oxidation on Pd Thin Film Coated Au Nanocrystals

Tang¹,

Zou

2019

Surfaces

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Cubic, octahedral, and rhombic dodecahedral gold nanocrystals enclosed by {100}, {111}, and {110} facets, respectively, were prepared by a seed-mediated growth method at the room temperature. Palladium thin films were coated on these Au nanocrystals by a redox replacement approach to explore their catalytic activities. It is revealed that formic acid and carbon monoxide oxidation in 0.1 M HClO4 on Au nanocrystals coated with one monolayer (ML) of Pd are facet-dependent and resemble those obtained from corresponding Pd single crystals and Pd films deposited on bulk Au single crystals, suggesting epitaxial growth of Pd overlayers on the Au nanocrystal surfaces. As the Pd film thickness increased, formic acid oxidation current density decreased and the CO oxidation potential moved to more negative. The catalytic activity remained largely unchanged after 3–5 MLs of Pd deposition. The specific adsorption of (bi)sulfate was shown to hinder the formic acid oxidation and the effect decreased with the increasing Pd film thickness. These observations were explained in the framework of the d-band theory. This study highlights the feasibility of engineering high-performance catalysts through deposition of catalytically active metal thin films on facet-controlled inert nanocrystals.

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“…Já a corrente de pico anódico no potencial de 0,1 V está relacionada com a dessorção de H + . [41][42][43][44] Comparando a resposta do PdF-AgSAE com a resposta do AgSAE, para uma solução de 100 µg L -1 de Tl + em 0,1 mol L -1 K 2 SO 4 , observa-se que, nesse caso, o filme de paládio proporcionou um incremento de aproximadamente 150% na resposta do AgSAE (Figura 2). Verificou-se também a resposta do PdF-AgSAE e do AgSAE em uma solução de 1,0 mmol L -1 H 2 SO 4 contendo 100 µg L -1 de Tl + .…”

Section: Influência Do Substrato Na Resposta Do Eletrodo De Filme De unclassified

Desempenho do eletrodo de filme de paládio na determinação de tálio e chumbo em amostras de águas naturais por voltametria de redissolução anódica com pulso diferencial

Santos¹,

Leite²,

Janoni³

et al. 2017

Quim. Nova

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BY DIFFERENTIAL PULSE ANODIC STRIPPING VOLTAMMETRY. The use of a palladium film electrode (PdFE) as an alternative electrode for the determination of thallium (Tl + ) and lead (Pb 2+ ) in water samples by anodic stripping voltammetry is proposed. Preliminary studies of the influence of the substrate were performed on the electrochemical behavior of PdFE prepared ex situ. Using a silver solid amalgam electrode as substrate (AgSAE), the effect of several parameters such as potential and deposition time, composition and pH of supporting electrolyte on the analytical response of PdFE for Tl + by differential pulse anodic stripping voltammetry (DPASV) was initially investigated. Under best experimental conditions of deposition potential of −1.2 V and deposition time of 300s the analytical curve was linear in the Tl + concentration from 3.0 to 100.0 µg L −1 with a relative standard deviation (RSD) <2.0%. The limit of detection (LOD) and limit of quantification (LOQ) were 0.89 µg L −1 and 2.96 µg L −1 , respectively. The PdFE was successfully applied for the determination of Tl + in water samples. Moreover, this electrode showed promising as a sensor for the simultaneous determination of Tl + and Pb 2+ and as a suitable alternative to the mercury electrode.Keywords: palladium film electrode; silver solid amalgam electrode; Tl + and Pb 2+ ; differential pulse anodic stripping voltammetry (DPASV).

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Hydrogen Adsorption, Absorption, and Desorption at Palladium Nanofilms formed on Au(111) by Electrochemical Atomic Layer Deposition (E-ALD): Studies using Voltammetry and In Situ Scanning Tunneling Microscopy

Cited by 24 publications

References 88 publications

Recent Advances in the Growth of Metals, Alloys, and Multilayers by Surface Limited Redox Replacement (SLRR) Based Approaches

Recent Advances in the Growth of Metals, Alloys, and Multilayers by Surface Limited Redox Replacement (SLRR) Based Approaches

Formic Acid Oxidation on Pd Thin Film Coated Au Nanocrystals

Desempenho do eletrodo de filme de paládio na determinação de tálio e chumbo em amostras de águas naturais por voltametria de redissolução anódica com pulso diferencial

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