The green chemistry paradigm in modern organic synthesis

Russian Chemical Reviews, Год журнала: 2023, Номер 92(12), С. RCR5104 - RCR5104

Опубликована: Дек. 1, 2023

After the appearance of green chemistry concept, which was introduced in vocabulary early 1990s, its main statements have been continuously developed and modified. Currently, there are 10–12 cornerstones that should form basis for an ideal chemical process. This review analyzes accumulated experience achievements towards design products processes reduce or eliminate use generation hazardous substances. The presents views leading Russian scientists specializing various fields this subject, including homogeneous heterogeneous catalysis, fine basic organic synthesis, electrochemistry, polymer chemistry, based on bio-renewable feedstocks energetic compounds materials. A new approach to quantitative evaluation environmental friendliness by authors is described. <br> bibliography includes 1761.

Язык: Английский

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CO₂-Assisted Oxidative Dehydrogenation of Propane over VO_x/In₂O₃ Catalysts: Interplay between Redox Property and Acid–Base Interactions

ACS Catalysis, Год журнала: 2022, Номер 12(18), С. 11239 - 11252

Опубликована: Сен. 1, 2022

In this work, a series of VOx-loaded In2O3 catalysts were prepared, and their catalytic performance was evaluated for CO2-assisted oxidative dehydrogenation propane (CO2-ODHP) compared with alone. The optimal composition is obtained on 3.4V/In2O3 (surface V density 3.4V nm–2), which exhibited not only higher C3H6 selectivity than other V/In under isoconversion conditions but also an improved reaction stability. To elucidate the catalyst structure–activity relationship, VOx/In2O3 characterized by chemisorption [NH3-temperature-programmed desorption (TPD), NH3-diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), CO2-TPD, CO2-DRIFTS], H2-temperature-programmed reduction (TPR), in situ Raman spectroscopy, UV–vis diffuse near-ambient pressure X-ray photoelectron absorption further examined using functional theory. In–O–V structure extent oligomerization, play crucial role improving stability, identified catalysts. particular, presence surface VOx (i) inhibits deep In2O3, thereby preserving activity, (ii) neutralizes excess basicity thus suppressing dry reforming achieving propylene selectivity, (iii) introduces additional redox sites that participate utilizing CO2 as soft oxidant. present work provides insights into developing selective, stable, robust metal-oxide CO2-ODHP controlling conversion reagents via desired pathways through interplay between acid–base interactions properties.

Язык: Английский

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Atomic layer deposition of Ga2O3 on γ-Al2O3 catalysts with higher interactions and improved activity and propylene selectivity in CO2-assisted oxidative dehydrogenation of propane

Applied Catalysis A General, Год журнала: 2023, Номер 655, С. 119117 - 119117

Опубликована: Фев. 25, 2023

Язык: Английский

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Tailoring the Olefin Selectivity in Catalytic Oxidative Dehydrogenation of Light Alkane by the Isolation Strategy

ACS Catalysis, Год журнала: 2024, Номер 14(4), С. 2502 - 2521

Опубликована: Фев. 2, 2024

Olefins are important building blocks that have been extensively used to produce diverse consumer products in petrochemical industry. Owing the requirement of low-carbon-footprint processes and increasing use light alkanes sourced from shale gas, an environmentally friendly economic route alternative state-of-the-art steam cracking crude oil has investigated for olefin production. The oxidative dehydrogenation (ODH) olefins attracted wide attention due absence thermodynamic limitations coke formation. However, excessive oxidation is prone occur this process. Developing a suitable ODH catalyst with high performance, particularly enhanced selectivity, more urgent but still remains challenge. In Review, we talk about representative currently developed isolation strategies optimize selectivity via process, conversion ethane ethylene, which include dispersion regulation metal oxide, nonmetal sites, construction dual functional sites isolate steps, adoption selective oxygen species promotion soft oxidants as reactants. Furthermore, mechanistic aspects activation participation tailoring then classified discussed detail. Finally, perspectives emerging technologies process listed evaluated.

Язык: Английский

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Recent progress in the development of catalysts for propane dehydrogenation in the presence of CO₂

Reaction Chemistry & Engineering, Год журнала: 2024, Номер 9(6), С. 1292 - 1312

Опубликована: Янв. 1, 2024

Propane dehydrogenation (PDH) has become an important strategy to address the ever-increasing global demand for propene.

Язык: Английский

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Support effects in vanadium incipient wetness impregnation for oxidative and non-oxidative propane dehydrogenation catalysis

Catalysis Today, Год журнала: 2024, Номер 430, С. 114546 - 114546

Опубликована: Янв. 22, 2024

Язык: Английский

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Unraveling the influence of CO2 and Ce loading over ZSM-5 for oxidative dehydrogenation of propane

Chemical Engineering Journal, Год журнала: 2024, Номер 485, С. 150009 - 150009

Опубликована: Фев. 26, 2024

Язык: Английский

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Highly selective electrocatalytic reduction of CO₂ to ethane over a petal-like Zn(OH)₂/Cu₂₊₁O/Cu foam catalyst at low overpotentials

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(22), С. 13510 - 13519

Опубликована: Янв. 1, 2024

Due to multiple reaction steps and a lack of efficient catalysts, the synthesis ethane from CO 2 electroreduction (ECO RR) is particularly challenging. A Zn(OH) /Cu 2+1 O/CF catalyst was applied in electrocatalytic reduction ethane, which offers high selectivity at low overpotentials.

Язык: Английский

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Copper oxide foam with high specific surface area for electrocatalytic reduction of CO₂ to C₂₊ products

cMat., Год журнала: 2024, Номер 1(1)

Опубликована: Июнь 1, 2024

Abstract The carbon dioxide reduction reaction (CO 2 RR) for the synthesis of high‐energy‐density and high‐value multi‐carbon (C 2+ ) products has demonstrated considerable potential practical applications. In this work, we design a novel copper oxide foam (OD‐Cu foam) catalyst through high‐temperature calcination process, characterized by substantial specific surface area. distinctive three‐dimensional structure OD‐Cu metal particles covered on its provide abundant active sites. total Faradaic efficiency 57.3% C over is achieved at −0.85 V versus reversible hydrogen electrode (RHE). Furthermore, partial current density reaches 44.1 mA cm −2 −0.95 RHE, surpassing significantly that both Cu (3.4 foil foil) (1.6 ). addition, integrated foam, which does not require complex preparation processes, facilitates application in CO RR. These results underscore significance high area, emphasizing effective sustainable conversion.

Язык: Английский

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Mass-Transfer Enhancement in the CO₂ Oxidative Dehydrogenation of Propane over GaN Supported on Zeolite Nanosheets with a Short b-Axis and Hierarchical Pores

ACS Catalysis, Год журнала: 2024, Номер 14(13), С. 10376 - 10391

Опубликована: Июнь 25, 2024

The CO2 oxidative dehydrogenation of propane (CO2–ODHP) is a highly important reaction for not only producing large amounts propylene but also consuming the resource. GaN/zeolite catalysts deliver preferable activity in reaction. However, similar to Pt- and Cr-based catalysts, there are shortcomings such as poor stability coke accumulation, especially when operated at temperatures higher than 550 °C. Generally, carbon deposition one main reasons catalyst deactivation. limited mass transfer greatly aggravates deposited formation, since precursors could be removed time. In present work, we modified zeolites with short b-axis hierarchical pores, which offer shorter diffusion distance pore-rich structure enhance transfer. Thanks this enhancement, offers an initial conversion 68.0% yield 39.4% propylene, surpassing other reported data. Importantly, showed low loss rate amount carbon, was easily regenerated compared those without or pores. Density functional theory (DFT) calculations situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirmed that involves coupling direct reduction via reverse water–gas shift reaction, participates work sheds light on designing efficient CO2–ODHP transfer-boosted strategy and, importantly, expected provide inspiration constructing zeolite

Язык: Английский

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