Characterization and catalytic activity in CO oxidation of biogenic lepidocrocite layered on anodic alumina

Shopska, Maya; Paneva, Daniela; Kolev, Hristo; Kadinov, G.; Briančin, Jaroslav; Fábian, Martin; Cherkezova‐Zheleva, Zara; Mitov, Ivan

doi:10.1016/j.cattod.2019.07.054

Cited by 3 publications

(3 citation statements)

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“…However, under carefully adjusted conditions, the created structure is highly ordered. In combination with intrinsic chemical and physical properties, material has been considered to various applications [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Amongst other materials, it offers fabrication simplicity and tailor-engineering versatility combined with the unprecedented self-ordered regularity as compared to other nanoporous materials [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

2021

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The development of aluminum anodization technology features many stages. With the story stretching for almost a century, rather straightforward—from current perspective—technology, raised into an iconic nanofabrication technique. The intrinsic properties of alumina porous structures constitute the vast utility in distinct fields. Nanoporous anodic alumina can be a starting point for: Templates, photonic structures, membranes, drug delivery platforms or nanoparticles, and more. Current state of the art would not be possible without decades of consecutive findings, during which, step by step, the technique was more understood. This review aims at providing an update regarding recent discoveries—improvements in the fabrication technology, a deeper understanding of the process, and a practical application of the material—providing a narrative supported with a proper background.

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Section: Introductionmentioning

confidence: 99%

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

2021

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“…It is stable over a wide range of temperatures (10–60 °C) and pH (4.0–8.0) [ 37 ]. Previously, lepidocrocite as a mineral was applied as a sensor, catalyst [ 38 , 39 , 40 ], and adsorbent of diverse pollutants [ 37 , 41 ] and pigments [ 42 ].…”

Section: Introductionmentioning

confidence: 99%

Spongin as a Unique 3D Template for the Development of Functional Iron-Based Composites Using Biomimetic Approach In Vitro

Kubiak,

Pajewska-Szmyt,

Kotula

et al. 2023

Marine Drugs

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Marine sponges of the subclass Keratosa originated on our planet about 900 million years ago and represent evolutionarily ancient and hierarchically structured biological materials. One of them, proteinaceous spongin, is responsible for the formation of 3D structured fibrous skeletons and remains enigmatic with complex chemistry. The objective of this study was to investigate the interaction of spongin with iron ions in a marine environment due to biocorrosion, leading to the occurrence of lepidocrocite. For this purpose, a biomimetic approach for the development of a new lepidocrocite-containing 3D spongin scaffold under laboratory conditions at 24 °C using artificial seawater and iron is described for the first time. This method helps to obtain a new composite as “Iron-Spongin”, which was characterized by infrared spectroscopy and thermogravimetry. Furthermore, sophisticated techniques such as X-ray fluorescence, microscope technique, and X-Ray diffraction were used to determine the structure. This research proposed a corresponding mechanism of lepidocrocite formation, which may be connected with the spongin amino acids functional groups. Moreover, the potential application of the biocomposite as an electrochemical dopamine sensor is proposed. The conducted research not only shows the mechanism or sensor properties of “Iron-spongin” but also opens the door to other applications of these multifunctional materials.

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“…The catalytic process of chemical reactions is known to occur on the surface. Even without direct contact, substantial evidence indicates that subsurface species are also important in various reactions. − For example, much research effort has been devoted to studying the role of subsurface oxygen atoms in Cu-based catalysts in CO 2 reduction reactions. ,,,− Despite intensive studies, there is still debate regarding the exact impacts of subsurface species on catalytic processes. , One of the most critical reasons is the difficulty associated with detecting, identifying, and distinguishing subsurface atoms from surface atoms, given that traditional surface science techniques often lack sufficient resolution . For instance, largely overlapping signals are often observed in X-ray photoelectron spectroscopy (XPS) spectra, one of the most widely used surface sensitive techniques. ,, On the contrary, to differentiate surface layers for microscopy-based techniques, the observed volumes must be sufficiently small, which may not be representative of the entire sample .…”

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confidence: 99%

Can Subsurface Oxygen Species in Oxides Participate in Catalytic Reactions? An ¹⁷O Solid-State Nuclear Magnetic Resonance Study

Yang,

Wang,

Xia

et al. 2024

J. Phys. Chem. Lett.

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The impacts of subsurface species of catalysts on reaction processes are still under debate, largely due to a lack of characterization methods for distinguishing these species from the surface species and the bulk. By using 17 O solid-state nuclear magnetic resonance (NMR) spectroscopy, which can distinguish subsurface oxygen ions in CeO 2 (111) nanorods, we explore the effects of subsurface species of oxides in CO oxidation reactions. The intensities of the 17 O NMR signals due to surface and subsurface oxygen ions decrease after the introduction of CO into CeO 2 nanorods, with a more significant decrease observed for the latter, confirming the participation of subsurface oxygen species. Density functional theory calculations show that the reaction involves subsurface oxygen ions filling the surface oxygen vacancies created by the direct contact of surface oxygen with CO. This new approach can be extended to the study of the role of oxygen species in other catalytic reactions.

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Characterization and catalytic activity in CO oxidation of biogenic lepidocrocite layered on anodic alumina

Cited by 3 publications

References 42 publications

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

Spongin as a Unique 3D Template for the Development of Functional Iron-Based Composites Using Biomimetic Approach In Vitro

Can Subsurface Oxygen Species in Oxides Participate in Catalytic Reactions? An ¹⁷O Solid-State Nuclear Magnetic Resonance Study

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Characterization and catalytic activity in CO oxidation of biogenic lepidocrocite layered on anodic alumina

Cited by 3 publications

References 42 publications

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

Recent Advances in Nanoporous Anodic Alumina: Principles, Engineering, and Applications

Spongin as a Unique 3D Template for the Development of Functional Iron-Based Composites Using Biomimetic Approach In Vitro

Can Subsurface Oxygen Species in Oxides Participate in Catalytic Reactions? An 17O Solid-State Nuclear Magnetic Resonance Study

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Can Subsurface Oxygen Species in Oxides Participate in Catalytic Reactions? An ¹⁷O Solid-State Nuclear Magnetic Resonance Study