Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Bagheri, Samira; Julkapli, Nurhidayatullaili Muhd; Hamid, Sharifah Bee Abd

doi:10.1155/2014/727496

Cited by 331 publications

(206 citation statements)

References 206 publications

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“…[21,29] Briefly, TiCl3 was added drop wise into a boiling 0.7 mol dm -3 HCl solution, to obtain the TiCl3 solution of 21.5 g dm -3 . During 90 min boiling under reflux, a part of the TiO2 particles, generated in the reaction mixture, aggregated in a loose precipitate.…”

Section: Tio2 Synthesismentioning

confidence: 99%

“…TiO2 appears to be suitable replacement since it is at least of low cost and high stability. [21][22][23] The synthesis of Pt/TiO2 needs to be carefully tailored to meet the demands for promising electrocatalytic materials of the next generation, especially for the cathodic FC reactions. [4] It was found that TiO2 enhances the Pt activity for oxygen reduction reaction [24] , which is assigned to increased electron density on Pt due to partial charge transfer from oxide to metal nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications

Košević¹,

Šekularac²,

Živković³

et al. 2017

Croat. Chem. Acta

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TiO2 powder was synthesized by a forced hydrolysis process and used for the synthesis of Pt/TiO2 composite that is to be foreseen as an advanced electrode material. Pt was incorporated into the synthesized TiO2 from a Pt colloidal dispersion as a precursor prepared by a microwave-assisted polyol process. Physicochemical properties of TiO2 and TiO2-supported Pt were investigated by scanning electron microscopy, dynamic light scattering and X-ray spectroscopy and diffraction techniques. The properties of Pt/TiO2 composite are correlated to the basic voltammetric response of its thin-layer form. It was found that subsequent thermal treatment of synthesized TiO2, which caused crystallization into mainly rutile phase, is required for appropriate Pt incorporation. Although being appropriately loaded by Pt, and the voltammetric response is typical for Pt-based material, the voltammetry of Pt/TiO2 corresponded to much lower loadings. The possibility for Pt particles to be trapped inside TiO2 agglomerates is indicated. The catalyst usage from the synthesized Pt/TiO2 was found quite moderate due to this trapping.

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Section: Tio2 Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications

Košević¹,

Šekularac²,

Živković³

et al. 2017

Croat. Chem. Acta

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show abstract

“…Titania has also received attention as a catalyst support that possesses good mechanical resistance, strong metal support interaction, chemical stability, and acid-base property and high potential in photocatalyst-related applications [27]. The deposition of titania on the surface of Fe 3 O 4 @SiO 2 was obtained following a different method [28].…”

Section: Post-coating Process: Magnetic Supports Containing Ceria Timentioning

confidence: 99%

Separation technology meets green chemistry: development of magnetically recoverable catalyst supports containing silica, ceria, and titania

Vono

Damasceno

Matos

et al. 2017

Pure and Applied Chemistry

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Magnetic separation can be considered a green technology because it is fast, efficient, consumes low energy, and minimizes the use of solvents and the generation of waste. It has been successfully used in laboratory scale to facilitate supported catalysts' handling, separation, recovery, and recycling. Only few materials are intrisically magnetic, hence the application of magnetic materials as catalyst supports has broaden the use of magnetic separation. Iron oxides, silica-coated iron oxides, and carbon-coated-cobalt are among the most studied catalyst supports; however, other metal oxide coatings, such as ceria and titania, are also very interesting for application in catalysis. Here we report the preparation of magnetically recoverable magnetic supports containing silica, ceria, and titania. We found that the silica shell protects the iron oxide core and allows the crystalization of ceria and titania at high temperature without compromising the magnetic properties of the catalyst supports.

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“…Titanium 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.…”

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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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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Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

Cited by 331 publications

References 206 publications

TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications

TiO2 From Colloidal Dispersion as Support in Pt/TiO2 Nanocomposite for Electrochemical Applications

Separation technology meets green chemistry: development of magnetically recoverable catalyst supports containing silica, ceria, and titania

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

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