4.10 Role of Acidic Sites on Metal Phosphates in the Catalytic Oxidation of iso-Butane

Takita, Yusaku; Kurosaki, Kazuo; Ito, Takehiko; Mizuhara, Yukako; Ishihara, Takeshi

doi:10.1016/s0167-2991(08)61855-8

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Numeric values of activation energies and the rate constant ratios are summarized in Table . LaPO 4 is mildly acidic and shows almost no basicity, in agreement with earlier work, , whereas La(OH) 3 shows both acidic and basic functionalities with a strong prevalence of basic character, again in agreement with the previous work on its properties and on the pronounced basicity of La 2 O 3 oxide, which is reversibly rehydrated toward La(OH) 3 at relatively low temperatures. , For the solid treated with KOH, the acidity dropped dramatically as compared with the initial LaOCl, but no concomitant increase of basicity was observed.…”

Section: Resultssupporting

confidence: 91%

Ordered Arrays of Nanorods Obtained by Solid−Liquid Reactions of LaOCl Crystals

et al. 2010

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A new top−bottom approach is developed to prepare ordered arrays of nanorods, based on controlled etching, as exemplified by the case of LaOCl crystals. Molten-salt issued LaOCl was applied as a precursor, with highly anisotropic crystals oriented along the [001] axis. These LaOCl flat crystals are reactive toward aqueous solutions at room temperature, yielding ordered assemblies of rod-like crystals. Depending on the reaction mixture composition, nanorods of LaOCl itself or other La compounds can be obtained. The morphology of the products obtained in the solutions can be finely controlled by adding extraneous chemical species which modify the etching kinetics. Thus, LaOCl reacts with the acidic phosphate solutions, leading to the arrays of LaPO4 nanorods, oriented along the [001] axis of the initial solid. By contrast, reaction with aqueous HCl produced assemblies of perpendicular rods, oriented along the [100] and [010] axes. The catalytic properties of the nanorods as obtained were tested in the decomposition of isopropanol. Strong differences of acid−base properties of differently oriented LaOCl particles have been observed.

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Section: Resultssupporting

confidence: 91%

Ordered Arrays of Nanorods Obtained by Solid−Liquid Reactions of LaOCl Crystals

et al. 2010

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“…Thus, we reported that LaPO 4 prepared topotactically from LaOCl is a so acidic catalyst, highly selective to the dehydration of isopropanol. 11 The advantage of the moderate acidity provided by LaPO 4 was evidenced for the oxidative dehydrogenation of butane 12 and formation of acetal. 13 Hexagonal LaPO 4 nanorods synthesized by a hydrothermal method were applied as a novel catalyst for photocatalytic reduction of CO 2 with H 2 O under mild conditions.…”

Section: Introductionmentioning

confidence: 99%

Non-aqueous preparation of LaPO₄nanoparticles and their application for ethanol dehydration

Afanasiev

2015

RSC Adv.

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SSCI-VIDE+ECI2D+PAFInternational audienceNanodispersed single phase monoclinic and hexagonal LaPO4 materials have been prepared in polar nonaqueous solvents at room temperature, by means of precursor salts metathesis. The morphology and phase composition strongly depend on the nature of the non-aqueous solvent. Reaction in propylene carbonate produced hexagonal LaPO4 nanorods; formamide gave a monolith gel with a monoclinic phase, whereas reaction in ethylene glycol led to the formation of a stable colloidal suspension of M-LaPO4. The outstandingly high specific surface areas of the materials allow their use as soft acidic catalytic materials for highly selective dehydration of ethanol. Comparison of the catalytic properties reveals the importance of the phase polymorph, with hexagonal LaPO4 demonstrating better catalytic performance than the monoclinic phase

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Dehydrogenation of isobutane to isobutene with iron-loaded activated carbon catalyst

Shimada

Akazawa

Ikenaga

et al. 1998

Applied Catalysis A: General

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4.10 Role of Acidic Sites on Metal Phosphates in the Catalytic Oxidation of iso-Butane

Cited by 4 publications

References 2 publications

Ordered Arrays of Nanorods Obtained by Solid−Liquid Reactions of LaOCl Crystals

Ordered Arrays of Nanorods Obtained by Solid−Liquid Reactions of LaOCl Crystals

Non-aqueous preparation of LaPO₄nanoparticles and their application for ethanol dehydration

Dehydrogenation of isobutane to isobutene with iron-loaded activated carbon catalyst

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4.10 Role of Acidic Sites on Metal Phosphates in the Catalytic Oxidation of iso-Butane

Cited by 4 publications

References 2 publications

Ordered Arrays of Nanorods Obtained by Solid−Liquid Reactions of LaOCl Crystals

Ordered Arrays of Nanorods Obtained by Solid−Liquid Reactions of LaOCl Crystals

Non-aqueous preparation of LaPO4nanoparticles and their application for ethanol dehydration

Dehydrogenation of isobutane to isobutene with iron-loaded activated carbon catalyst

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Non-aqueous preparation of LaPO₄nanoparticles and their application for ethanol dehydration