Pt/Ce–La Nanocomposite for Hydrogenation Promoted by a Synergistic Effect of Support with Redox and Basic Property

Wang, Fei; Yu, Zairan; Wei, Xiaoyang; Wu, Zhuangzhi; Liu, Na; Xue, Bing; Gao, Li

doi:10.1007/s10562-022-03934-3

Cited by 11 publications

(6 citation statements)

References 49 publications

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“…XRD patterns of the CeO 2 and Ce 1 Zn 0.1 O δ nanorods prepared by the described hydrothermal method were present in Figure 1. The CeO 2 nanorods exhibited intense diffraction peaks at 28.4°, 33.0°, 47.4°, and 56.4°, corresponding to the (111), ( 200), (220), and (311) planes of the cubic fluorite structure of CeO 2 (PDF#43-1002), [26] respectively. Meanwhile, the Ce 1 Zn 0.1 O δ nanorods mainly exhibited the crystal structure of CeO 2 .…”

Section: Resultsmentioning

confidence: 99%

Zn‐Doped CeO₂ Nanorods: a Highly Efficient Heterogeneous Catalyst for the Direct Synthesis of Dimethyl Carbonate from CO₂ and Methanol

Liu

Xue

et al. 2023

ChemistrySelect

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The direct synthesis of dimethyl carbonate from methanol and CO 2 is a green and sustainable processes. In this paper, a new type of Zn-doped CeO 2 nanorods catalyst was successfully prepared by a facile hydrothermal process, and characterized by a combination of techniques including XRD, Raman, HRTEM, SEM, N 2 -sorption, CO 2 -TPD, NH 3 -TPD, XPS. The catalyst was employed as a catalyst for the synthesis of dimethyl carbonate from methanol and CO 2 . Catalytic results revealed that the Ce 1 Zn 0.1 O δ nanorods catalyst demonstrated superior catalytic activity, affording a high DMC yield of 24.2 mmol DMC /g cat , which compared favorably to other previously reported catalysts. According to the XPS and CO 2 -TPD measurements, in comparison with the pure CeO 2 nanorods, the surface oxygen vacancies and weak basic sites can be systemically enriched by introducing optimal amount of Zn dopants into CeO 2 to improve the catalytic activity for the reaction. This work establishes an efficient catalyst for the direct synthesis of dimethyl carbonate from CO 2 and methanol.[a] N.

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Section: Resultsmentioning

confidence: 99%

Zn‐Doped CeO₂ Nanorods: a Highly Efficient Heterogeneous Catalyst for the Direct Synthesis of Dimethyl Carbonate from CO₂ and Methanol

Liu

Xue

et al. 2023

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“…Furthermore, the total H 2 uptake of Pt8Co1/ZSM-5-AT catalyst was obviously higher than the sum of the H 2 uptakes of Pt/ZSM-5-AT catalyst. These results indicated that PtCo bimetallic systems showed more hydrogen consumption, which may correspond to the intense metal–metal and metal–support interactions [ 23 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…Alternatively, an appropriate support (such as oxides, carbons, and zeolites) can adjust the electronic properties of Pt species via their interaction, and consequently, it promotes the reaction activity, selectivity, and recycle stability [ 22 ]. In our previous work, the optimal electronic Pt-Ce-La composite support interactions on the redox sites, the excellent catalytic performance was achieved [ 23 ]. The same example, such as Wang et al reported a Pt/mesoTiO 2 -SiO 2 -M catalyst, showed excellent COL selectivity at almost complete CAL conversion, because electrons transfer from the mesoTiO 2 -SiO 2 -M to Pt, leading to a high density of electrons on the Pt surfaces.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Activity of Alkali-Treated ZSM-5 Zeolite-Supported Pt-Co Catalyst for Selective Hydrogenation of Cinnamaldehyde

Cheng

Liu³

et al. 2023

Molecules

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A bimetallic Pt8Co1 supported on alkali-treated ZSM-5 zeolite (ZSM-5-AT) was prepared through the impregnation method. The structure and surface properties of the catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2-sorption and X-ray photoelectron spectroscopy (XPS) as well as temperature-programmed desorption of NH3 (NH3-TPD) and temperature-programmed reduction of H2 (H2-TPR). The TEM images present that the bimetallic Pt8Co1 nanoparticles with a mean particle size of 4–6 nm were uniformly dispersed on the alkali-treated ZSM-5 zeolite. The bimetallic Pt8Co1/ZSM-5-AT catalyst exhibited an extraordinary COL selectivity of 65% at a > 99% CAL conversion efficiency, which showed a much higher catalytic performance (including the activity and selectivity) than the monometallic Pt/ZSM-5-AT and Co/ZSM-5-AT catalysts in the selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) using hydrogen as reducing agent. The high catalytic activity of the bimetallic catalyst was attributed to the higher electron density of Pt species and more acidic sites of the alkali-treated ZSM-5 zeolite support. The recovery test showed no obvious loss of its initial activity of the Pt8Co1/ZSM-5-AT catalyst for five times.

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“…Recently, Liu et al [ 9 ] created a highly stable and selective ZrO 2 -Al 2 O 3 co-precipitation catalyst for the reactive distillation and DMC synthesis. With a focus on the acid–base balance and its connection to catalytic performance, the impact of the aluminum concentration on structural characteristics and catalyst acid–base efficiency was examined [ 35 ]. A reactive distillation column was used to assess the catalytic effectiveness.…”

Section: Developed Methods For Green Dmc Synthesismentioning

confidence: 99%

New Strategies on Green Synthesis of Dimethyl Carbonate from Carbon Dioxide and Methanol over Oxide Composites

et al. 2022

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Dimethyl carbonate is a generally used chemical substance which is environmentally sustainable in nature and used in a range of industrial applications as intermediate. Although various methods, including methanol phosgenation, transesterification and oxidative carbonylation of methanol, have been developed for large-scale industrial production of DMC, they are expensive, unsafe and use noxious raw materials. Green production of DMC from CO2 and methanol is the most appropriate and eco-friendly method. Numerous catalysts were studied and tested in this regard. The issues of low yield and difficulty in tests have not been resolved fundamentally, which is caused by the inherent problems of the synthetic pathway and limitations imposed by thermodynamics. Electron-assisted activation of CO2 and membrane reactors which can separate products in real-time giving a maximum yield of DMC are also being used in the quest to find more effective production method. In this review paper, we deeply addressed green production methods of DMC using Zr/Ce/Cu-based nanocomposites as catalysts. Moreover, the relationship between the structure and activity of catalysts, catalytic mechanisms, molecular activation and active sites identification of catalysts are also discussed.

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Pt/Ce–La Nanocomposite for Hydrogenation Promoted by a Synergistic Effect of Support with Redox and Basic Property

Cited by 11 publications

References 49 publications

Zn‐Doped CeO₂ Nanorods: a Highly Efficient Heterogeneous Catalyst for the Direct Synthesis of Dimethyl Carbonate from CO₂ and Methanol

Zn‐Doped CeO₂ Nanorods: a Highly Efficient Heterogeneous Catalyst for the Direct Synthesis of Dimethyl Carbonate from CO₂ and Methanol

Enhanced Activity of Alkali-Treated ZSM-5 Zeolite-Supported Pt-Co Catalyst for Selective Hydrogenation of Cinnamaldehyde

New Strategies on Green Synthesis of Dimethyl Carbonate from Carbon Dioxide and Methanol over Oxide Composites

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Pt/Ce–La Nanocomposite for Hydrogenation Promoted by a Synergistic Effect of Support with Redox and Basic Property

Cited by 11 publications

References 49 publications

Zn‐Doped CeO2 Nanorods: a Highly Efficient Heterogeneous Catalyst for the Direct Synthesis of Dimethyl Carbonate from CO2 and Methanol

Zn‐Doped CeO2 Nanorods: a Highly Efficient Heterogeneous Catalyst for the Direct Synthesis of Dimethyl Carbonate from CO2 and Methanol

Enhanced Activity of Alkali-Treated ZSM-5 Zeolite-Supported Pt-Co Catalyst for Selective Hydrogenation of Cinnamaldehyde

New Strategies on Green Synthesis of Dimethyl Carbonate from Carbon Dioxide and Methanol over Oxide Composites

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Zn‐Doped CeO₂ Nanorods: a Highly Efficient Heterogeneous Catalyst for the Direct Synthesis of Dimethyl Carbonate from CO₂ and Methanol

Zn‐Doped CeO₂ Nanorods: a Highly Efficient Heterogeneous Catalyst for the Direct Synthesis of Dimethyl Carbonate from CO₂ and Methanol