Investigations on the crystal plane effect of ceria on gold catalysis in the oxidative dehydrogenation of alcohols and amines in the liquid phase

Wang, Min; Wang, Feng; Ma, Jiping; Li, Mingrun; Zhang, Zhe; Wang, Yehong; Zhang, Xiaochen; Xu, Jie

doi:10.1039/c3cc46180g

Cited by 94 publications

(90 citation statements)

References 37 publications

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“…The highest conversion of benzyl alcohol ( % 17.5 %) was obtained over PtRu-200 H, and the conversion in the absence of a catalyst was negligible (Figure 3 b). This performance is similar to that of Pt-Sn, [17] and Au/CeO 2 [18] under similar reaction conditions, and is almost as good as the highly active Pd-Au alloy reported by Hutchings and co-workers. [12a] Unlike preferential CO oxidation, the activity and selec- tivity decline predictably on increasing the treatment temperature.…”

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confidence: 85%

Tuning Surface Properties and Catalytic Performances of Pt–Ru Bimetallic Nanoparticles by Thermal Treatment

Zhang

Zheng

et al. 2014

ChemCatChem

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The surface structure and catalytic properties of Pt–Ru bimetallic catalysts with identical bulk composition can be continuously tuned by treatment at different temperatures. The activity of these catalysts in CO oxidation was positively related to the treatment temperature, but the opposite trend was observed for the solvent‐free oxidation of benzyl alcohol. It was found that migration of Pt to the surface occurred when the treatment temperature was increased. During this process, the surface of the Pt–Ru nanoparticles changed from a Ru‐rich surface to a Pt‐rich surface. The electronic interactions between Pt and Ru became stronger with increased treatment temperature, and the amount of oxidized Pt species on the surface was higher for the samples treated at higher temperatures. Therefore, oxidized Pt species are more active in CO oxidation than other metallic species, but are less active in the selective oxidation of benzyl alcohol.

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confidence: 85%

Tuning Surface Properties and Catalytic Performances of Pt–Ru Bimetallic Nanoparticles by Thermal Treatment

Zhang

Zheng

et al. 2014

ChemCatChem

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“…We successfully prepared CeO 2 with different morphologies via the previously reported methods [23,24,36,37], and confirmed their morphology by XRD ( Figure S1) and HRTEM ( Figure S2). The average sizes of CeO 2 with different morphologies were determined by TEM ( Figure S2).…”

Section: Effect Of Crystalline Planementioning

confidence: 79%

“…CeO2 samples with different morphologies were prepared by hydrothermal methodology reported by our and other groups previously [23,24,36,37].…”

Section: Preparation Of the Ceo2 Catalystsmentioning

confidence: 99%

“…In a typical experiment, Ce(NO 3 ) 3 ·6H 2 O (5.0 g) was dissolved in Millipore-purified water (18 mΩ·cm, 100 mL), and then the solution was adjusted to a pH of 11.0 by the addition of NH 3 ·H 2 O under stirring at room temperature. The obtained precipitate was filtered, washed with deionized water, and then dried at 120 • C for 12 h. The obtained solid was calcined at 500 • C under the flow of air (50 mL·min −1 ) for 4 h. CeO 2 samples with different morphologies were prepared by hydrothermal methodology reported by our and other groups previously [23,24,36,37].…”

Section: Preparation Of the Ceo 2 Catalystsmentioning

confidence: 99%

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Synthesis of 1,3-Diols from Isobutene and HCHO via Prins Condensation-Hydrolysis Using CeO2 Catalysts: Effects of Crystal Plane and Oxygen Vacancy

et al. 2017

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Abstract:We herein report the synthesis of 3-methyl-1,3-butanediol from isobutene and HCHO in water via a Prins condensation-hydrolysis reaction over CeO 2 , which is a water-tolerant Lewis acid catalyst. The CeO 2 exhibits significant catalytic activity for the reaction, giving 95% HCHO conversion and 84% 3-methyl-1,3-butanediol selectivity at 150 • C for 4 h. The crystal planes of CeO 2 have a significant effect on the catalytic activity for the Prins reaction. The (110) plane shows the highest catalytic activity among the crystal planes investigated (the (100), (110), and (111) planes), due to its higher concentration of Lewis acid sites, which is in line with the concentration of oxygen vacancies. Detailed characterizations, including NH 3 -TPD, pyridine-adsorbed FT-IR spectroscopy, and Raman spectroscopy, revealed that the concentration of Lewis acid sites is proportional to the concentration of oxygen vacancies. This study indicates that the Lewis acidity induced by oxygen vacancy can be modulated by selective synthesis of CeO 2 with different morphologies, and that the Lewis acidity and oxygen vacancy play an important role in Prins condensation and hydrolysis reaction.

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“…Recently, nickel complexes were also reported [8]. In heterogeneous dehydrogenative catalytic systems, mainly noble metals catalysts were reported: alumina-supported silver cluster, hydrotalcite supported silver nanoparticles, ceria supported gold nanoparticles, alumina-supported Pt nanoparticles, alumina-supported Re nanoparticles [9][10][11][12][13]. Particularly, high reactivity was reported for the oxidation of aliphatic alcohols in anaerobic condition [12].…”

Section: Introductionmentioning

confidence: 99%

Dehydrogenative Oxidation of Alcohols Catalyzed by Highly Dispersed Ruthenium Incorporated Titanium Oxide

et al. 2016

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Ruthenium incorporated titanium oxides (Ru x TiO 2 ) were prepared by a one-step hydrothermal method using Ti(SO 4 ) 2 and RuCl 3 as the precursor of Ti and Ru, respectively. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), Energy-dispersive X-ray spectroscopy (EDS) mapping, and BET were applied for the analyses of catalysts. Ruthenium atoms are well dispersed in the anatase phase of TiO 2 and the crystallite size of Ru x TiO 2 (≈17 nm) is smaller than that of pure TiO 2 (≈45 nm). In particular, we found that our homemade pure TiO 2 exhibits a strong Lewis acid property. Therefore, the cooperation of ruthenium atoms playing a role in the hydride elimination and the Lewis acid site of TiO 2 can efficiently transfer primary alcohols into corresponding aldehydes in an oxidant-free condition.

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Investigations on the crystal plane effect of ceria on gold catalysis in the oxidative dehydrogenation of alcohols and amines in the liquid phase

Abstract: Gold nanoparticles supported on ceria{110} crystal planes were more reactive than on ceria{111} and {100} in the oxidative dehydrogenation of alcohols. Kinetic analysis and a Hammett plot suggest that hydride transfer is involved, and the cationic gold is catalytically active.

Cited by 94 publications

References 37 publications

Tuning Surface Properties and Catalytic Performances of Pt–Ru Bimetallic Nanoparticles by Thermal Treatment

Tuning Surface Properties and Catalytic Performances of Pt–Ru Bimetallic Nanoparticles by Thermal Treatment

Synthesis of 1,3-Diols from Isobutene and HCHO via Prins Condensation-Hydrolysis Using CeO2 Catalysts: Effects of Crystal Plane and Oxygen Vacancy

Dehydrogenative Oxidation of Alcohols Catalyzed by Highly Dispersed Ruthenium Incorporated Titanium Oxide

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