Cobalt electrodeposition in nanoporous anodic aluminium oxide for application as catalyst for methane combustion

Tzaneva, B. R.; Naydenov, A.; Todorova, S.; Videkov, Valentin; Milusheva, Vesselina; Stefanov, P.

doi:10.1016/j.electacta.2016.01.063

Cited by 37 publications

(16 citation statements)

References 38 publications

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“…The main parameters of these templates are summarized in table 1. In our previous SEM investigations [6] it was determined that at similar experimental conditions (as in samples B1601-3 and B1601-4) the diameters of the pores were about 30-40 nm and grew up to 60-70 nm after their widening (samples B1601-1and B1601-2). Polishing was used to reduce the Al foil thickness and thereby obtain anodic oxide of different thickness.…”

Section: Morphology Of Porous Anodic Alumina Templatesmentioning

confidence: 99%

Atomic layer deposition of ZnO:Al on PAA substrates

Blagoev

Vlakhov

Videkov

et al. 2016

J. Phys.: Conf. Ser.

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Abstract. In this work the ZnO:Al films of different thickness are grown on the Porous Anodic Alumina (PAA) and p-Si (100) substrates by Atomic Layer Deposition. The ZnO:Al films thicknesses are chosen appropriately in order to obtain complete filled pores as well as pores with a thin covering on the surface. The obtained structures are investigated with spectroscopic ellipsometry and Scanning Electron Microscopy (SEM) techniques.

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Section: Morphology Of Porous Anodic Alumina Templatesmentioning

confidence: 99%

Atomic layer deposition of ZnO:Al on PAA substrates

Blagoev

Vlakhov

Videkov

et al. 2016

J. Phys.: Conf. Ser.

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“…This is clearly demonstrated using HAADF‐STEM(‐EDX) (Figure , a and b). To the best of our knowledge, the presence of the active metal in the AAO pores is clearly evidenced for the first time by a combination of HAADF‐STEM and elemental mapping via EDX; former studies mostly rely only on (S)TEM characterization without elemental mapping of the catalyst; or they used XPS and XRD which give no spatial information on the location of the metal nanoparticles ,. The Ru particles are rather small (mainly 1–3 nm), ensuring that the pores are not blocked with Ru (Figure , c).…”

Section: Resultsmentioning

confidence: 99%

“…The AAOs are often applied in fields different from catalysis, such as sensing, biocompatibilization and as templates for other nanostructures, for instance nanotubes, ‐wires, ‐rods . However, only few studies considered the catalytic activity of the AAOs . Different transition metals (e. g. Pd, Pt, Cu and Co) were tested for their activity for instance in hydrogenation and steam reforming reactions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Ru‐Loaded Anodized Aluminum Oxide for Hydrogenation Catalysis

et al. 2019

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Anodized aluminum oxides (AAOs) are synthesized and used as catalyst support in combination with Ru as metal in hydrogenation catalysis. SEM and TEM analysis of the as‐synthesized AAOs reveal uniform, ordered nanotubes with pore diameters of 18 nm, which are further characterized with Kr physisorption, XRD and FTIR spectroscopy. After impregnation of the AAOs with Ru, the presence of Ru nanoparticles inside the tubular pores is evidenced clearly for the first time via HAADF‐STEM‐EDX. The Ru−AAOs have been tested for catalytic activity, which showed high conversion and selectivity for the hydrogenation of toluene and butanal.

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“…The second set of experiments uses an alternative procedure to fill the pores by electrodeposition [175,176]. Electrodeposition of metals on a porous structure can lead to incomplete filling, clustered deposition and inhomogeneous filling [177][178][179]. Au 23 -Ag 77 materials were electrochemically etched in HClO 4 aqueous solution, and electrodeposition of Cu was performed from a CuSO 4 + H 2 SO 4 solution.…”

Section: Catalysts As Porous Materials-nanoporous Aumentioning

confidence: 99%

Atom Probe Tomography for Catalysis Applications: A Review

2019

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Atom probe tomography is a well-established analytical instrument for imaging the 3D structure and composition of materials with high mass resolution, sub-nanometer spatial resolution and ppm elemental sensitivity. Thanks to recent hardware developments in Atom Probe Tomography (APT), combined with progress on site-specific focused ion beam (FIB)-based sample preparation methods and improved data treatment software, complex materials can now be routinely investigated. From model samples to complex, usable porous structures, there is currently a growing interest in the analysis of catalytic materials. APT is able to probe the end state of atomic-scale processes, providing information needed to improve the synthesis of catalysts and to unravel structure/composition/reactivity relationships. This review focuses on the study of catalytic materials with increasing complexity (tip-sample, unsupported and supported nanoparticles, powders, self-supported catalysts and zeolites), as well as sample preparation methods developed to obtain suitable specimens for APT experiments.

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Cobalt electrodeposition in nanoporous anodic aluminium oxide for application as catalyst for methane combustion

Cited by 37 publications

References 38 publications

Atomic layer deposition of ZnO:Al on PAA substrates

Atomic layer deposition of ZnO:Al on PAA substrates

Synthesis and Characterization of Ru‐Loaded Anodized Aluminum Oxide for Hydrogenation Catalysis

Atom Probe Tomography for Catalysis Applications: A Review

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