Silver nanoparticles supported on zirconia–ceria for the catalytic wet air oxidation of methyl tert-butyl ether

Guerra‐Que, Zenaida; Torres‐Torres, Gilberto; Pérez-Vidal, Hermicenda; Cuauhtémoc-López, I.; Monteros, A. Espinosa de los; Beltramini, Jorge; Frías-Márquez, D.M.

doi:10.1039/c6ra25684h

Cited by 34 publications

(15 citation statements)

References 80 publications

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“…The trimetallic supported nanocatalysts developed and synthesized in this study possess particular structural properties allowing them to be used for several catalytic applications. The close intimate interaction between metals and support (strong metal–support interaction) is a highly desirable structural property for nanocatalysts as it promotes their redox properties [ 53 , 54 ]. The strong metal–support interaction has a relationship with the number of oxygen vacancies in the support [ 54 , 55 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

et al. 2021

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NiWAu trimetallic nanoparticles (NPs) on the surface of support Al2O3-CeO2-TiO2 were synthesized by a three-step synthetic method in which Au NPs were incorporated into presynthesized NiW/Al2O3-CeO2-TiO2. The recharge method, also known as the redox method, was used to add 2.5 wt% gold. The Al2O3-CeO2-TiO2 support was made by a sol–gel method with two different compositions, and then two metals were simultaneously loaded (5 wt% nickel and 2.5 wt% tungsten) by two different methods, incipient wet impregnation and ultrasound impregnation method. In this paper, we study the effect of Au addition using the recharge method on NiW nanomaterials supported on mixed oxides on the physicochemical properties of synthesized nanomaterials. The prepared nanomaterials were characterized by scanning electron microscopy, BET specific surface area, X-ray diffraction, diffuse reflectance spectroscopy in the UV–visible range and temperature-programmed desorption of hydrogen. The experimental results showed that after loading of gold, the dispersion was higher (46% and 50%) with the trimetallic nanomaterials synthesized by incipient wet impregnation plus recharge method than with impregnation plus ultrasound recharge method, indicating a greater number of active trimetallic (NiWAu) sites in these materials. Small-sized Au from NiWAu/ACTU1 trimetallic nanostructures was enlarged for NiWAu/ACT1. The strong metal NPs–support interaction shown for the formation of NiAl2O4, Ni-W-O and Ni-Au-O species simultaneously present in the surface of trimetallic nanomaterial probably plays an important role in the degree of dispersion of the gold active phase.

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Section: Resultsmentioning

confidence: 99%

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

et al. 2021

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“…DR UV-vis spectroscopy ( Figure 5) is used to examine the nature and environment of Zr and Fe species. The ZrO 2 shows a typical absorption band in 200-250 nm range, which is attributed to O 2-→Zr 4+ charge transfer transition in zirconia 18 . The new bands observed at higher wavelengths in the UV-vis spectra of xFe-ZrO 2 solids correspond to iron species.…”

Section: Effect Of the Amount Of Iron On The Physicochemical Propertimentioning

confidence: 99%

Effect of the iron amount on the physicochemical properties of Fe–ZrO2 aerogel catalysts for the total oxidation of Toluene in the presence of water vapor

et al. 2020

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“…31 The small peak with the highest binding energy (915.59 eV) reveals the existence of a few Ce 4+ species. 32,33 This happened probably because some of Ce 3+ species were oxidized to Ce 4+ in the preparation process. The P and Mo elements of CePMo were also identified by P2p (Figure S10) and Mo3d (Figure 5D) XPS spectra.…”

Section: Structures and Properties Of Cepmo/tio 2 Catalystsmentioning

confidence: 99%

CePMo ₁₂ O ₄₀ / TiO ₂ catalysts for photocatalytic oxidation of methane to value‐added organic oxygenates

Ming

Wang

2021

Int J Energy Res

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Methane is the main component of natural gas. The effective activation of C-H bond of methane to synthesize value-added compounds under mild conditions is attractive. Compared to the most investigated noble metal catalysts (such as Au, Pd, and Rh), rare earth metal catalysts possess stronger oxidizing activity. Herein, we report the first synthesis of Ce cation-based phosphomolybdic salt (CePMo 12 O 40 ) with a simple milling method. Furthermore, CePMo 12 O 40 -based TiO 2 catalyst (CePMo/TiO 2 ) exhibited excellent catalytic performance for selective conversion of methane, achieving high yield (5618.5 μmol/g cat ) of organic oxygenates (CH 3 OOH, HCOOH, and HCHO) using O 2 as an oxidant in water at 150 C under 1.5G sunlight irradiation for 2 hours. It was found that the yield of total produced organic oxygenates over CePMo/TiO 2 is 119% larger with 1.5G sunlight light irradiation than that without the light irradiation. In addition, the introduction of CePMo into TiO 2 increased its photocatalytic activity for organic oxygenates by 11%. The isotope-labeling evaluation revealed that both H 2 O and O 2 participated the oxidation of methane into CH 3 OOH, HCOOH, and HCHO. This work provides the first example of rare earth POM-based photocatalysts for conversion of methane into liquid oxygenates.

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Silver nanoparticles supported on zirconia–ceria for the catalytic wet air oxidation of methyl tert-butyl ether

Abstract: In this work Ag nanoparticles supported on ZrO2–CeO2 promoted with different amounts of CeO2 were synthesized by deposition–precipitation method in order to test the Catalytic Wet Air Oxidation (CWAO) of Methyl Tert-Butyl Ether (MTBE).

Cited by 34 publications

References 80 publications

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

Effect of the iron amount on the physicochemical properties of Fe–ZrO2 aerogel catalysts for the total oxidation of Toluene in the presence of water vapor

CePMo ₁₂ O ₄₀ / TiO ₂ catalysts for photocatalytic oxidation of methane to value‐added organic oxygenates

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Silver nanoparticles supported on zirconia–ceria for the catalytic wet air oxidation of methyl tert-butyl ether

Abstract: In this work Ag nanoparticles supported on ZrO2–CeO2 promoted with different amounts of CeO2 were synthesized by deposition–precipitation method in order to test the Catalytic Wet Air Oxidation (CWAO) of Methyl Tert-Butyl Ether (MTBE).

Cited by 34 publications

References 80 publications

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al2O3-CeO2-TiO2 Nanomaterials

Effect of the iron amount on the physicochemical properties of Fe–ZrO2 aerogel catalysts for the total oxidation of Toluene in the presence of water vapor

CePMo 12 O 40 / TiO 2 catalysts for photocatalytic oxidation of methane to value‐added organic oxygenates

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About

CePMo ₁₂ O ₄₀ / TiO ₂ catalysts for photocatalytic oxidation of methane to value‐added organic oxygenates