Cobalt-containing oxide layers on titanium, their composition, morphology, and catalytic activity in CO oxidation

Vasilyeva, M. S.; Руднев, В. С.; Ustinov, A. Yu.; Korotenko, I. A.; Modin, Evgeny; Voitenko, O. V.

doi:10.1016/j.apsusc.2010.08.031

Cited by 38 publications

(9 citation statements)

References 24 publications

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“…This is due to variability of manganese oxidation numbers and more developed and a rough surface of mixed manganese containing oxide. Obtained results are in accordance with the data [15][16][17] and advantage of this work is that observed in this paper coatings do not need additional impregnation. Thus above data confirm the efficiency of materials as catalysts for the CO conversion and gaseous wastes neutralization.…”

Section: Resultssupporting

confidence: 80%

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Research on the improvement of mixed titania and Co(Mn) oxide nano-composite coatings

Yar-Mukhamedova

Ved

Karakurkchi

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The structure and the properties of the oxide films formed on titanium in the diphosphate based electrolytes by means of plasma electrolytic oxidizing at direct current density of 2-2.5 A· dm −2 have been studied. Oxide layers of different composition and content of alloying elements were obtained by modification of electrolytes and variation in current density. The interelectrode voltage during PEO, chemical and phase composition, topography and microstructure of the formed layers depend on the electrolyte composition and applied current density. The spark-discharge regime was shown to be reached at inter-electrode voltage 100 to 130 V depending on the composition of electrolyte. The effect of chemical composition and surface morphology formed mixed oxide films on the corrosion resistance and catalytic activity has been discussed. IntroductionTitanium is the most common oxide in heterogeneous catalysis and photo-catalysis for the purification gas and liquid media from toxicant [1,2]. This fact is attributed to the fairly high chemical stability under different operating conditions, no toxicity, and relatively low cost of this material. At the same time it was found that, in most cases, catalyst materials based on mixed two or three component oxide systems exhibit high activity and selectivity not only in heterogeneous red-ox reactions [3-5] but also in photo-catalytic ones [6][7][8]. Synthesis of nano-composite catalytic disperse systems based on titania is carried out by various methods, including sol-gel processes [6,9,10].The formation different kind of oxide layers has been achieved by the anodic oxidation and plasma surface treatment in the sparking regime (plasma electrolytic oxidizing PEO) seems to be the very promising since it does not need the sophisticated facilities, allows to form various types of titania and to incorporate different species into the layer by modification of electrochemical parameters and of electrolyte chemistry [11][12][13][14].Titania layers containing manganese oxides obtained by PEO in acetate-borate electrolyte was noted to be catalytic active in CO conversion to CO 2 [15]. Cobalt-containing oxide coatings on titanium are obtained from a silicate electrolyte with cobalt acetate addition [16]. However, the increase in the catalytic activity of above materials in CO oxidation reaction was achieved by additional impregnation followed by annealing. In [17] catalytic materials on titanium and aluminum doped with transition metal oxides (Mn, Fe, Co, Ni) were obtained in one stage by the PEO method,

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Section: Resultssupporting

confidence: 80%

“…Cobalt-containing oxide coatings on titanium are obtained from a silicate electrolyte with cobalt acetate addition [16]. However, the increase in the catalytic activity of above materials in CO oxidation reaction was achieved by additional impregnation followed by annealing.…”

Section: Introductionmentioning

confidence: 99%

Research on the improvement of mixed titania and Co(Mn) oxide nano-composite coatings

Yar-Mukhamedova

Ved

Karakurkchi

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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show abstract

“…Article [21] is devoted to the formation of mixed oxide systems Ti x Zn y O z from the alkaline electrolytes based on diphosphate with the addition of zinc oxide. In paper [22], silicate electrolyte with the addition of cobalt acetate was used to obtain the oxide coatings of titanium with cobalt. The PEO of titanium was conducted in one stage at effective current density 10-20 A/dm 2 during 10 min.…”

Section: Examining the Formation And Properties Of Tio 2 Oxide Coatinmentioning

confidence: 99%

Examining the formation and properties of TiO2 oxide coatings with metals of iron triad

Сахненко

Karakurkchi

Galak

et al. 2017

EEJET

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“…Cobalt-containing oxide coatings on titanium [24] were obtained from a silicate electrolyte with the addition of cobalt acetate. However, an increase in the catalytic activity of the received materials in the oxidation reaction of CO was achieved by the additional impregnation and subsequent annealing of the obtained oxide systems.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Application of oxide-metallic catalysts on valve metals for ecological catalysis

Karakurkchi

Сахненко

Ved

et al. 2017

EEJET

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Cobalt-containing oxide layers on titanium, their composition, morphology, and catalytic activity in CO oxidation

Cited by 38 publications

References 24 publications

Research on the improvement of mixed titania and Co(Mn) oxide nano-composite coatings

Research on the improvement of mixed titania and Co(Mn) oxide nano-composite coatings

Examining the formation and properties of TiO2 oxide coatings with metals of iron triad

Application of oxide-metallic catalysts on valve metals for ecological catalysis

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