Defect-mediated adsorption of methanol and carbon dioxide on BaTiO3(001)

Garra, John; Vohs, John M.; Bonnell, Dawn A.

doi:10.1116/1.3168563

Cited by 16 publications

(12 citation statements)

References 49 publications

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“…This variation in the energy levels at the surface dramatically influences chemical reactivity. We and others have shown that molecular adsorption is domain specific in a number of systems 21–25. Domain specific photo oxidation and reduction have been demonstrated in liquids, and a range of metal and metal oxide nanoparticles have been produced in a domain specific manner 26–30.…”

Section: Polarization Dependent Reactionsmentioning

confidence: 94%

Controlling Polarization Dependent Reactions to Fabricate Multi‐Component Functional Nanostructures

Conklin

Park

Nanayakkara

et al. 2011

Adv Funct Materials

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In spite of novel lithographic processes that enable new approaches to fabricating materials, directed assembly of multi‐component hybrid devices remains a challenge. Ferroelectric nanolithography exploits polarization dependent surface interactions to pattern nanoparticles, but the factors that control the particle size and distribution are not sufficiently well understood to produce hybrid nanostructures. Here the effects of photon energy, photon flux, and polarization vector orientation on ferroelectric domain specific photoreactions are quantified, leading to an understanding of the nanoparticle deposition mechanism. Patterned nanoparticle arrays functionalized with optically active porphyrin complexes are configured into optoelectronic devices.

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Section: Polarization Dependent Reactionsmentioning

confidence: 94%

Controlling Polarization Dependent Reactions to Fabricate Multi‐Component Functional Nanostructures

Conklin

Park

Nanayakkara

et al. 2011

Adv Funct Materials

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“…The chemical stability and reactivity of oxide materials are largely controlled by defects and impurities, and experimental studies are complicated by the presence of surface defects (Garra et al, 2009). Typical defects in oxides are point defects (missing atoms, e.g.…”

Section: Figurementioning

confidence: 99%

Polarization dependence of molecular adsorption on ferroelectrics

Kraya

2013

Acta Crystallogr Sect B

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The structural details of ferroelectric surfaces influence the effect of ferroelectric polarization on surface chemistry, and it is important to understand and control defect functionality as well as identify adsorption sites in ferroelectric materials. Ferroelectric domain polarization has been found to have a significant effect on surface properties and interactions. Here, both the structure and the presence of local electric fields are examined simultaneously. The surface structure and ferroelectric domain orientation are controlled while molecular adsorption effects are quantified. We use scanning tunneling microscopy (STM) to determine the surface and electronic effects of polarization-gas interactions on a model ferroelectric surface, BaTiO 3 (001).

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“…Apart from water, the interaction of various molecules (CO, NO, alcohols, etc.) with these materials has also been considered, especially to assess the effect of surface polarization . This effect is small but can significantly modify the bonding strength in some cases.…”

Section: Introductionmentioning

confidence: 99%

Application of a sensitive catalytic reactor to the study of CO oxidation over SrTiO₃(100) and BaTiO₃/SrTiO₃(100) ferroelectric surfaces

Nassreddine

Morfin

Niu

et al. 2014

Surface & Interface Analysis

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The use of ferroelectric materials as adsorbents or catalysts could be a promising way to control surface chemical reactions by tuning the ferroelectric polarization. In this context, the oxidation of carbon monoxide over well‐defined SrTiO3(100) and BaTiO3/SrTiO3(100) perovskite surfaces was investigated under stoichiometric gas‐phase conditions at a total pressure of 3 Torr, in the 100–300 °C temperature range. To this aim, an ultrahigh vacuum‐compatible reactor equipped with external laser heating, and specially designed to detect small yields of gaseous products by mass spectrometry, was used. Prior to the catalytic tests, with the help of Auger electron spectroscopy, a sample cleaning procedure under low oxygen pressure was established in order to remove carbon impurities. The as‐prepared surfaces appear poorly active in CO oxidation, but their activity increases if a high‐temperature pre‐annealing treatment under ultrahigh vacuum is applied in order to produce oxygen vacancies, which act as adsorption and/or reaction sites. The activity of the bare SrTiO3 substrates, whether doped with Nb or not, is similar to that of the supported BaTiO3 films, but the latter lose less activity upon evacuation/reaction cycles. Isotopic labeling experiments using 18O2 show that the reaction involves CO (and O2) dissociation, and that lattice oxygen participates to the reaction via the so‐called Mars–van Krevelen mechanism. Copyright © 2014 John Wiley & Sons, Ltd.

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Defect-mediated adsorption of methanol and carbon dioxide on BaTiO3(001)

Cited by 16 publications

References 49 publications

Controlling Polarization Dependent Reactions to Fabricate Multi‐Component Functional Nanostructures

Controlling Polarization Dependent Reactions to Fabricate Multi‐Component Functional Nanostructures

Polarization dependence of molecular adsorption on ferroelectrics

Application of a sensitive catalytic reactor to the study of CO oxidation over SrTiO₃(100) and BaTiO₃/SrTiO₃(100) ferroelectric surfaces

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Defect-mediated adsorption of methanol and carbon dioxide on BaTiO3(001)

Cited by 16 publications

References 49 publications

Controlling Polarization Dependent Reactions to Fabricate Multi‐Component Functional Nanostructures

Controlling Polarization Dependent Reactions to Fabricate Multi‐Component Functional Nanostructures

Polarization dependence of molecular adsorption on ferroelectrics

Application of a sensitive catalytic reactor to the study of CO oxidation over SrTiO3(100) and BaTiO3/SrTiO3(100) ferroelectric surfaces

Contact Info

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Application of a sensitive catalytic reactor to the study of CO oxidation over SrTiO₃(100) and BaTiO₃/SrTiO₃(100) ferroelectric surfaces