Atomic Layer Deposition of FeO on Pt(111) by Ferrocene Adsorption and Oxidation

Paul, Rajib; Reifenberger, R.; Fisher, Timothy S.; Zemlyanov, Dmitry

doi:10.1021/acs.chemmater.5b01778

Cited by 46 publications

(54 citation statements)

References 65 publications

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“…7 shows the dominant peak at 529.9 eV attributed to iron oxides [51]. Second component at 531.5 eV could be ascribed to subnanometer FeO clusters [62] or Fe-OH [63]. The oxygen spectrum also contains a weak high energy component at 532.9 eV assigned to B-O species, as will be discussed later.…”

Section: Influence Of Coadsorbed Oxygenmentioning

confidence: 88%

Fe intercalation under graphene and hexagonal boron nitride in-plane heterostructure on Pt(111)

Píš

Nappini

Bondino

et al. 2018

Carbon

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Metal nanostructures confined between sp 2 hybridized 2D materials and solid supports are attracting attention for their potential application in new nanotechnologies. Model studies under welldefined conditions are valuable for understanding the fundamental aspects of the phenomena under 2D covers. In this work we investigate the intercalation of iron atoms through a single layer of mixed graphene and hexagonal boron nitride on Pt(111) using a combination of spectroscopic and microscopic techniques. Thermally activated diffusion of iron proceeds preferentially under graphene and only partially under hexagonal boron nitride areas. When oxygen is coadsorbed with iron, the intercalation rate is higher, and formation of B 2 O 3 and oxygenated B-C species is observed. Our results suggest the possibility of confining ferromagnetic layers under heterostructures of graphene and hexagonal boron nitride with potential technological implications in the fields of spintronics, magnetic data storage or chemistry under 2D covers. * Corresponding authors.

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Section: Influence Of Coadsorbed Oxygenmentioning

confidence: 88%

Fe intercalation under graphene and hexagonal boron nitride in-plane heterostructure on Pt(111)

Píš

Nappini

Bondino

et al. 2018

Carbon

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“…For this specific case it means that depositing Fe 2+ , as required in FeTiO 3 , is very challenging. Several attempts at doing this with many different precursors have very recently led to an advance in this field, and ALD of both FeO and Fe 3 O 4 have been reported in the last two years . Combination of such processes, yielding lower oxidation state ions with existing routes for other metals would open up a very interesting new area of ALD chemistry, and possibly samples of great interest.…”

Section: Expanding the Toolboxmentioning

confidence: 99%

Functional Perovskites by Atomic Layer Deposition – An Overview

Sønsteby

Fjellvåg

Nilsen

2017

Adv Materials Inter

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properties in thin film complex oxides and their heterostructures is still in its infancy.Functional perovskite oxide thin films have traditionally been deposited by physical, high temperature techniques, such as molecular beam epitaxy (MBE) and pulsed laser deposition (PLD). While these methods can provide films of very high structural quality, they do not offer deposition of conformal film on complex structures while maintaining control of stoichiometry. Chemical deposition techniques were long thought unsuitable for deposition of complex systems with high structural quality. This has changed dramatically over the last two decades. One of the most important techniques to emerge in this area has been atomic layer deposition (ALD).In this short review we aim to summarize the perovskite and ABO 3 -oxides, down to the ilmenite structure, that have been deposited using the ALD technique. The review includes work done over the last 20 years, and covers all oxide perovskites with ferromagnetic, piezoelectric and ferroelectric functionality known to have been deposited by ALD ( Table 1). The origin of the properties in these specific structures is briefly discussed, followed by a complete listing of the known systems. Perovskite heterostructures with new properties and combinations of properties are brought up, before thoughts on possible future work in the field concludes the paper. Why Atomic Layer Deposition?The ALD technique was pioneered independently in both Russia and Finland during the 1960s and 70s, and its history was thoroughly described by Puurunen in 2014. [4] The technique has been comprehensively discussed in several review papers over the last years. The first commercial application was to deposit zinc sulfide, used for electroluminescent display panels. The number of materials with known deposition routes was very limited for the first 20 years, before it exploded in the 1990s and still continues to grow. At the time of the review written by Miikkulainen et al. in 2013, binary oxides of most of the natural elements had been reported, as well as many nitrides, sulfides and fluorides (Figure 2). [5] As the community has embraced the possibility of growing epitaxial films of high chemical and structural quality, systems that are even more complex have been deposited, including materials with ternary, quaternary and even quinary compositions.The advantages and drawbacks of ALD as a thin film deposition technique have been reviewed several times the The last 20 years have seen a massive increase in reports on complex oxides with functional properties synthesized by atomic layer deposition (ALD). Many of these compounds have perovskite or perovskite-related structures, and exhibit a range of electric and magnetic properties. This short review summarizes the current status of functional perovskites and ABO 3 compounds down to the ilmenite structure prepared by ALD, focusing on ferromagnetism and ferro-and piezoelectricity. All perovskite-related compounds known to have been deposited by ALD down to the ilmeni...

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“…The adsorbate coverage is determined from XP models as outlined in Ref. [32][33][34][35]. In order to validate the CVD-based catalytic results and to obtain a broader experimental basis of the Pd-Zr 0 system with respect to methanol steam reforming performance, also an intermetallic bulk phase of …”

Section: Preparation Of Materialsmentioning

confidence: 99%

A Comparative Discussion of the Catalytic Activity and CO2-Selectivity of Cu-Zr and Pd-Zr (Intermetallic) Compounds in Methanol Steam Reforming

et al. 2017

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Abstract:The activation and catalytic performance of two representative Zr-containing intermetallic systems, namely Cu-Zr and Pd-Zr, have been comparatively studied operando using methanol steam reforming (MSR) as test reaction. Using an inverse surface science and bulk model catalyst approach, we monitored the transition of the initial metal/intermetallic compound structures into the eventual active and CO 2 -selective states upon contact to the methanol steam reforming mixture. For Cu-Zr, selected nominal stoichiometries ranging from Cu:Zr = 9:2 over 2:1 to 1:2 have been prepared by mixing the respective amounts of metallic Cu and Zr to yield different Cu-Zr bulk phases as initial catalyst structures. In addition, the methanol steam reforming performance of two Pd-Zr systems, that is, a bulk system with a nominal Pd:Zr = 2:1 stoichiometry and an inverse model system consisting of CVD-grown ZrO x H y layers on a polycrystalline Pd foil, has been comparatively assessed. While the CO 2 -selectivity and the overall catalytic performance of the Cu-Zr system is promising due to operando formation of a catalytically beneficial Cu-ZrO 2 interface, the case for Pd-Zr is different. For both Pd-Zr systems, the low-temperature coking tendency, the high water-activation temperature and the CO 2 -selectivity spoiling inverse WGS reaction limit the use of the Pd-Zr systems for selective MSR applications, although alloying of Pd with Zr opens water activation channels to increase the CO 2 selectivity.

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Atomic Layer Deposition of FeO on Pt(111) by Ferrocene Adsorption and Oxidation

Cited by 46 publications

References 65 publications

Fe intercalation under graphene and hexagonal boron nitride in-plane heterostructure on Pt(111)

Fe intercalation under graphene and hexagonal boron nitride in-plane heterostructure on Pt(111)

Functional Perovskites by Atomic Layer Deposition – An Overview

A Comparative Discussion of the Catalytic Activity and CO2-Selectivity of Cu-Zr and Pd-Zr (Intermetallic) Compounds in Methanol Steam Reforming

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