Microstructure of platinum films on YSZ prepared by pulsed laser deposition

Beck, G.; Pöpke, Hendrik; Luerßen, Bjoern; Janek, Jürgen

doi:10.1016/j.jcrysgro.2011.02.046

Cited by 19 publications

(12 citation statements)

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“…70À72,88À90 Subsequently, the samples were annealed for 12 h at 1023 K, and the counter electrode (Ag paste sintered at 773 K for 0.5 h) was applied opposite to the Pt working electrode (Figure 2). As all Pt films deposited on YSZ(111) by PLD so far grew in (111) orientation and only their crystallite size, defect concentration, and surface morphology may vary, 88,94 only scanning electron microscopy (SEM) images of the surfaces before (Figure 3a) and after annealing (Figure 3b) were taken.…”

Section: Methodsmentioning

confidence: 99%

“…Single crystalline Pt(111) films were grown on one-sided polished YSZ(111) single crystals (9.5 mol % Y 2 O 3 ; Crystec, Germany) using pulsed laser deposition (PLD), similar as reported previously ( T substrate ∼ 650 K; platinated alumina mask to obtain a circular Pt film of about 16 mm 2 ). − ,− Subsequently, the samples were annealed for 12 h at 1023 K, and the counter electrode (Ag paste sintered at 773 K for 0.5 h) was applied opposite to the Pt working electrode (Figure ). As all Pt films deposited on YSZ(111) by PLD so far grew in (111) orientation and only their crystallite size, defect concentration, and surface morphology may vary, , only scanning electron microscopy (SEM) images of the surfaces before (Figure a) and after annealing (Figure b) were taken.…”

Section: Methodsmentioning

confidence: 99%

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Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtO_xFormation

et al. 2012

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The oxidation of platinum (Pt) plays a key role in electrochemistry, both in the solid and liquid state, and in surface science. This work provides a comprehensive comparison of current knowledge of Pt oxidation in these three fields. By presenting new data of the solid state epitaxial model-type interface Pt(111)/yttria-stabilized zironia (YSZ(111)), fundamental insights are obtained: (i) analogous features in cyclic voltammograms of the interfaces Pt(111)/acid aqueous electrolyte and Pt(111)/YSZ(111) are correlated and their differences explained. (ii) By comparing the cathodic peak shapes of cyclic voltammograms of Pt/YSZ to temperature-programmed desorption spectra, the peaks can be attributed to an adsorption and an oxide-like state of oxygen. (iii) The linearity between the accumulation of oxygen at the Pt electrode and the logarithm of polarization time for sufficiently high anodic potentials, which is well-known in aqueous electrochemistry, is also found at the interface Pt/YSZ for the first time, and the mechanism leading to this time law is discussed.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtO_xFormation

et al. 2012

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“…where YSZ electrolyte, Pt and O 2 meet) is electrochemically active for oxygen reduction, which has been shown in several mechanistic studies. [61][62][63][64][65][66][67] While Pt electrodes on YSZ show rather slow oxygen exchange kinetics, the OER activity of MIEC electrodes can be increased by depositing catalytically active Pt species, which show a high affinity for oxygen splitting and ionization. 68 In a recent study 69 , platinum nanoparticles were deposited on the surface of LSF thin film electrodes and, especially at very low oxygen partial pressures (0.25 mbar O 2 ) a severe decrease of the polarisation resistance was observed.…”

Section: Introductionmentioning

confidence: 99%

“…where YSZ electrolyte, Pt and O 2 meet) is electrochemically active for oxygen reduction, which has been shown in several mechanistic studies. 61–67…”

Section: Introductionmentioning

confidence: 99%

Performance modulation through selective, homogenous surface doping of lanthanum strontium ferrite electrodes revealed by in situ PLD impedance measurements

et al. 2022

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“…Several studies have been dedicated to the PLD growth of (111)‐ and (001)‐oriented Pt films. For instance, (111)‐oriented Pt films were successfully grown on (100) yttrium‐stabilized zirconia (YSZ) at substrate temperatures from 200–800 °C .…”

Section: Introductionmentioning

confidence: 99%

Tuning the Surface Electrochemistry by Strained Epitaxial Pt Thin Film Model Electrodes Prepared by Pulsed Laser Deposition

Temmel

Fabbri

Pergolesi

et al. 2016

Adv Materials Inter

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toward different reactions such as methanol [ 1 ] or ethanol [ 2,3 ] oxidation, hydrogen oxidation, [ 4 ] and oxygen reduction reaction. [ 5,6 ] However, the slow kinetics of some of these reactions results in great losses concerning the respective energy conversion effi ciencies. This drawback, together with Pt dissolution phenomena requires a large amount of Pt at the electrode. The accompanying cost and scarcity of Pt represent the prime impediments toward a broad practical application of fuel cells. Electrode interface properties play a decisive role in controlling the electrocatalytic performance. [ 7 ] Since Pt-based materials are to date the best electrocatalysts for these reactions, [ 8 ] extensive research has been dedicated to develop novel Pt-based catalyst architectures with a specifi cally tailored electrode-electrolyte interface. In recent years it has been demonstrated that strain on metal surfaces can have a signifi cant impact on the adsorbate's binding energies and on the activation energy barrier for adsorption processes. [ 9 ] In this regard, core-shell nanoparticles (NPs), where an outer monolayer (ML) of Pt is supported on another metal [ 10,11 ] or on Pt-alloy NPs [ 12 ] have been designed. The strain in these systems is generated due to the difference in lattice constant between the outer ML and the core of the NP. When the top ML adapts its crystal lattice to the underlying core lattice, depending on the sign of the lattice misfi t the ensuing stress induces tensile or compressive lattice distortions (strain).In general, surface strain can also be generated by deposition of ultrathin (few ML thick) metal fi lms on substrates. [ 3,[13][14][15] One strategy utilizes the galvanic displacement of an underpotentially deposited (UPD) copper-ML by Pt on various substrates. [ 3,13 ] The strained Pt MLs reveal a substantial increase in activity toward methanol and ethanol electrooxidation. The electrochemical behavior of ultrathin Pt fi lms of varying thickness evaporated on Ru(0001) substrates was also examined by cyclic voltammetry (CV). [ 16 ] It was found that the reversible adsorption of H and OH strongly depends on the Pt thickness and in turn the extent of the strain induced in the Pt surface. Recently, another approach involved growing ultrathin Pt fi lms on W(111) substrates with varying Pt thickness of 2.2, 3.3, and A novel approach for tailoring strained Pt model electrocatalysts using pulsed laser deposition is presented. The physical properties of Pt fi lms grown on single-crystalline (100)-and (111)-oriented strontium titanate depend signifi cantly on the various deposition parameters (e.g., fl uence, temperature, background atmosphere, postannealing, and number of process steps), as revealed by scanning electron microscopy and X-ray studies. By properly selecting the deposition conditions, thin, epitaxial, and strained (100)-and (111)-oriented Pt fi lms suitable as model electrodes can be prepared. Cyclic voltammetry measurements indicate that the strain in the Pt fi lms changes sig...

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Microstructure of platinum films on YSZ prepared by pulsed laser deposition

Cited by 19 publications

References 35 publications

Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtO_xFormation

Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtO_xFormation

Performance modulation through selective, homogenous surface doping of lanthanum strontium ferrite electrodes revealed by in situ PLD impedance measurements

Tuning the Surface Electrochemistry by Strained Epitaxial Pt Thin Film Model Electrodes Prepared by Pulsed Laser Deposition

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Microstructure of platinum films on YSZ prepared by pulsed laser deposition

Cited by 19 publications

References 35 publications

Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtOxFormation

Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtOxFormation

Performance modulation through selective, homogenous surface doping of lanthanum strontium ferrite electrodes revealed by in situ PLD impedance measurements

Tuning the Surface Electrochemistry by Strained Epitaxial Pt Thin Film Model Electrodes Prepared by Pulsed Laser Deposition

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Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtO_xFormation

Oxidation of Platinum in the Epitaxial Model System Pt(111)/YSZ(111): Quantitative Analysis of an Electrochemically Driven PtO_xFormation