One‐pot Synthesis of Phosphorus‐modified ZSM‐5 Zeolite by Solid‐state Method and its MTO Catalytic Performance

Zhou, Zihan; Wang, Xingwen; Li, Junjie; Yu, Guangzheng; Yu, Rui; Jiang, Rongli

doi:10.1002/chem.202203095

Cited by 12 publications

(6 citation statements)

References 52 publications

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“…Further, to investigate the acidity of the as-prepared Pt8Co1/ZSM-5-AT, Pt/ZSM-5-AT, and Co/ZSM-5-AT catalysts, the NH 3 -TPD analyses were carried out. Based on previous reports, ZSM-5 support exhibited two NH 3 desorption peaks at 241 °C and 445 °C, which can be assigned to a weak acid site and a strong acid site on the surface of ZSM-5 zeolite, respectively [ 29 ]. As displayed in Figure 4 , after loading Pt and/or Co, all catalysts only showed one ammonia desorption broad peak centered at about 250 °C (180 °C to 400 °C), which was attributed to the weak acid sites.…”

Section: Resultsmentioning

confidence: 98%

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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Section: Resultsmentioning

confidence: 98%

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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“…Moreover, the introduction of a phosphorus promoter enhanced the surface acidity of the ZSM-5 zeolite. In a recent work by Zhou et al [58], it was found that the introduction of phosphorus into ZSM-5 zeolite increases the acidity of the zeolite. The incorporation of phosphorus into the zeolite framework changed the physical and surface acid-base properties of the ZSM-5/P catalyst.…”

Section: Characterizationmentioning

confidence: 98%

Catalytic Dehydration of Lactic Acid to Acrylic Acid over Phosphorus Promoted and Alkali Modified ZSM-5

Syeitkhajy,

Boz,

Boroglu

2024

Preprint

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We have developed a selective and active catalyst for sustainable industrial production of acrylic acid (AA) from lactic acid (LA). The phosphorus-promoted and alkali-modified ZSM-5/P-Na catalyst exhibited the best performance, achieving 83% AA selectivity and 98% LA conversion. We have successfully demonstrated that the acid-base properties of the zeolite can be easily modified by adding a promoter during synthesis. To elucidate the structural and acid-base properties of the ZSM-5/P-Na catalyst, comprehensive analytical techniques were employed, including XRD, BET, FT-IR, ICP-MS, TGA, NH₃, and CO₂-TPD. It was found that the distribution of aluminum, silicon, phosphorus, and sodium species in the catalyst structure significantly affected its acid-base properties. Additionally, the alkaline treatment method used in this study caused desilication in the ZSM-5 zeolite structure. Desilication enhanced weak and medium acidity of the phosphorus-promoted ZSM-5 zeolite, while a high alkali concentration promoted mesopore formation. The results showed that the ZSM-5/P-Na exhibited not only higher selectivity and LA conversion but also a longer catalytic lifetime (50 hours) in the LA to AA reaction. Finally, an experimental design of the catalyst was developed to understand the optimal values of the important operational variables in the LA dehydration reaction.

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“…What is more, apart from a diffraction peak near 19.1°in CD-PB-TPP, the intensity of PB signature peaks in CD-PB-TPP XRD spectra were reduced significantly, illustrating the introduction of phosphorus from the TPP donor. [22,23] The UV absorption spectra showed a characteristic absorption at 600-800 nm in PB, CD-PB, and CD-PB-TPP, indicating the attachment of PB to CD (Figure 1e). In addition, the chemical structure and composition of CD-PB were investigated using X-ray photoelectron spectroscopy (XPS) (Figure 1f), showing typical peaks of C1s (285.08 eV, 55.94%), N 1s (400.08 eV, 17.96%), O 1s (531.08 eV, 17%), and Fe 2p (711.08 eV, 1.74%), respectively.…”

Section: Characterization Of Cd-pb-tppmentioning

confidence: 99%

Rescuing Nucleus Pulposus Cells from ROS Toxic Microenvironment via Mitochondria‐Targeted Carbon Dot‐Supported Prussian Blue to Alleviate Intervertebral Disc Degeneration

Shi,

Bu,

Chu

et al. 2024

Adv Healthcare Materials

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Intervertebral disc degeneration (IVDD) is invariably accompanied by excessive accumulation of reactive oxygen species (ROS), resulting in progressive deterioration of mitochondrial function and senescence in nucleus pulposus cells (NPCs). Significantly, the main ROS production site in non‐immune cells is mitochondria, suggesting mitochondria is a feasible therapeutic target to reverse IVDD. Triphenylphosphine (TPP), which is known as mitochondrial‐tropic ligands, is utilized to modify carbon dot‐supported Prussian blue (CD‐PB) to scavenge superfluous intro‐cellular ROS and maintain NPCs at normal redox levels. CD‐PB‐TPP can effectively escape from lysosomal phagocytosis, permitting efficient mitochondrial targeting. After strikingly lessening the ROS in mitochondria via exerting antioxidant enzyme‐like activities, such as superoxide dismutase, catalase, etc CD‐PB‐TPP rescues damaged mitochondrial function and NPCs from senescence, catabolism, and inflammatory reaction in vitro. Imaging evaluation and tissue morphology assessment in vivo suggest that disc height index, mean grey values of nucleus pulposus tissue, and histological morphology were significantly improved in the IVDD model after CD‐PB‐TPP locally performed. In conclusion, this study demonstrates that ROS‐induced mitochondrial dysfunction and senescence of NPCs leads to IVDD and the CD‐PB‐TPP possesses enormous potential to rescue this pathological process through efficient removal of ROS via targeting mitochondria, supplying a neoteric strategy for IVDD treatment.This article is protected by copyright. All rights reserved

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One‐pot Synthesis of Phosphorus‐modified ZSM‐5 Zeolite by Solid‐state Method and its MTO Catalytic Performance

Cited by 12 publications

References 52 publications

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

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

Catalytic Dehydration of Lactic Acid to Acrylic Acid over Phosphorus Promoted and Alkali Modified ZSM-5

Rescuing Nucleus Pulposus Cells from ROS Toxic Microenvironment via Mitochondria‐Targeted Carbon Dot‐Supported Prussian Blue to Alleviate Intervertebral Disc Degeneration

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