Catalysis Letters最新文献

Efficient Glycerol Carbonylation over Multimetallic ZIF Catalysts: Synergy of Structure Regulation and Charge Optimization 多金属ZIF催化剂上的高效甘油羰基化：结构调节和电荷优化的协同作用

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-12 DOI: 10.1007/s10562-025-05266-4

Liyao Zhao, Zhihao Lv, Shuqi Qi, Pingbo Zhang, Jiawen Zhang, Mingming Fan

The valorization of glycerol is a key research objective, and its carbonylation to glycerol carbonate represents a promising route. A major hurdle in this process is the development of efficient catalysts.This study systematically investigates the catalytic performance of various transition metal-based zeolitic imidazolate frameworks (ZIFs), including ZIF-8, ZIF-67, Cu-ZIF, Cu-ZIF-8, Cu-ZIF-67, and Co-ZIF-8, in the carbonylation of glycerol to glycerol carbonate. The results reveal that bimetallic ZIFs significantly enhance catalytic activity, among them, the Co-doped Pd/Co-ZIF-8-N catalyst exhibited the best performance, achieving a high glycerol carbonate yield of 92.97% and 96.37% selectivity, with a Pd loading of only 1%. Through characterization techniques such as Fourier Transform Infrared Spectroscopy (FT-IR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), X-Ray Photoelectron Spectroscopy (XPS), and CO₂-Temperature Programmed Desorption (CO₂-TPD), we demonstrate that Co doping promotes the formation of carbon nanotubes, improves Pd dispersion, and modulates the acid–base properties of the material. Computational simulations further indicate that the combination of Co and Zn optimizes the natural charge distribution in the reaction transition state, facilitating electron transfer and thereby enhancing catalytic performance. Additionally, calcination temperature markedly influences the valence state and coordination environment of copper species, where the formation of a Cu–N₄ structure at high temperatures strengthens the synergistic effect with Pd. This work provides new mechanistic insights and material design strategies for the application of multimetallic ZIFs in carbonylation reactions.

Graphical Abstract

甘油的增值是一个重要的研究目标，碳酸甘油羰基化是一个很有前途的途径。这一过程的一个主要障碍是高效催化剂的开发。本研究系统地研究了各种过渡金属基沸石咪唑酸框架（zif），包括ZIF-8、ZIF-67、Cu-ZIF、Cu-ZIF-8、Cu-ZIF-67和Co-ZIF-8在甘油羰基化制碳酸甘油中的催化性能。结果表明，双金属zif显著提高了催化活性，其中共掺杂Pd/Co-ZIF-8-N催化剂表现出最好的性能，在Pd负载仅为1%的情况下，实现了92.97%的碳酸甘油收率和96.37%的选择性。通过傅里叶变换红外光谱（FT-IR）、x射线衍射（XRD）、扫描电镜（SEM）、x射线光电子能谱（XPS）和CO₂-程序升温解吸（CO₂-TPD）等表征技术，我们证明了CO掺杂促进了碳纳米管的形成，改善了Pd的分散性，并调节了材料的酸碱性质。计算模拟进一步表明，Co和Zn的结合优化了反应过渡态的自然电荷分布，促进了电子转移，从而提高了催化性能。此外，煅烧温度显著影响铜的价态和配位环境，其中Cu-N₄结构在高温下的形成加强了与Pd的协同作用。这项工作为多金属zif在羰基化反应中的应用提供了新的机理见解和材料设计策略。图形抽象

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引用次数: 0

Zr/P Co-Doped TiO2 Nanonanocatalyst for Microwave-Assisted Green Synthesis of Bioactive Azlactones: Enhanced Catalytic Performance and Mechanistic Insights Zr/P共掺杂TiO2纳米催化剂用于微波辅助绿色合成生物活性氮内酯：增强的催化性能和机理研究

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-12 DOI: 10.1007/s10562-025-05267-3

Lakshmi Rekha Buddiga, Ganapathi Rao Gajula, Manuri Brahmayya, Ponnala Bhanuchander

The development of multifunctional and sustainable catalysts for heterocycle construction remains critically important in modern organic chemistry. A novel Zr/P co-doped TiO₂ nanocatalyst that was made via a Sol-gel chemical method and show how well it performs in the green, microwave-assisted production of azlactones. Zr and P co-doping creates oxygen vacancies, increases Lewis/Brønsted acidity, narrows the band gap, and greatly improves charge-carrier separation features directly responsible for the catalyst’s remarkable activity—in contrast to pristine TiO₂, which has a wide band gap and rapid charge recombination. This material provides greater yields (89–96%), significantly shorter reaction durations (3–4 min), and superior recyclability when compared to previously reported TiO₂ based or metal-oxide catalysts. Through quick dielectric heating, microwave irradiation speeds up reaction kinetics even more, creating a synergistic boost for azlactone synthesis that has never been seen before. Thus, this study presents a unique dual-strategy catalytic system that combines microwave activation and defect-engineered TiO₂ nanophotocatalysis, providing a scalable, energy-efficient, and environmentally friendly pathway to pharmaceutically relevant azlactones.

Graphical Abstract

在现代有机化学中，开发多功能和可持续的杂环结构催化剂是至关重要的。一种新型的Zr/P共掺杂TiO2纳米催化剂，通过溶胶-凝胶化学方法制备，并展示了它在绿色微波辅助生产氮唑内酯方面的良好表现。Zr和P共掺杂产生了氧空位，增加了Lewis/Brønsted酸度，缩小了带隙，并大大改善了电荷-载流子分离特性，这直接导致了催化剂的显著活性-与原始TiO2相比，其具有较宽的带隙和快速的电荷重组。与之前报道的TiO2基或金属氧化物催化剂相比，该材料具有更高的收率（89-96%），显著缩短反应持续时间（3-4分钟），并且具有更好的可回收性。通过快速的电介质加热，微波辐射加速了反应动力学，创造了前所未有的氮杂内酯合成的协同促进作用。因此，本研究提出了一种独特的双策略催化体系，结合了微波活化和缺陷工程TiO2纳米光催化，为药学上相关的氮杂内酯提供了一种可扩展、节能和环保的途径。图形抽象

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引用次数: 0

Durable CuZnAl Layered Double Hydroxides for Robust Removal of Methyl Orange from Water 耐用的CuZnAl层状双氢氧化物，用于从水中去除甲基橙

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-12 DOI: 10.1007/s10562-025-05264-6

Shen-Wei Yu, Chia-Hsiang Yang, Chen-Bin Wang

In this study, CuZnAl layered double hydroxide (LDH) adsorbents were synthesized via a facile co-precipitation method and evaluated for the removal of methyl orange (MO), a model anionic azo dye. Comprehensive characterization using XRD, FTIR, BET, and SEM confirmed the successful formation of phase-pure carbonate-type LDHs with ordered layer stacking, mesoporous texture, and plate-like morphology. Among the samples tested, CuZnAl exhibited the highest BET surface area (45 m² g⁻¹) and the largest total pore volume (0.432 cm³ g⁻¹), facilitating superior adsorption performance. Batch experiments revealed that all adsorbents achieved maximum removal at acidic pH, with CuZnAl reaching ≈ 100% MO removal at pH 3. Adsorption kinetics followed the pseudo-second-order model (R² > 0.99), indicating that chemisorption and interlayer ion exchange were the dominant mechanisms. The Langmuir isotherm model provided excellent fits (R² > 0.96), with the highest maximum monolayer adsorption capacity (qₘ) observed for CuZnAl (392.2 mg g⁻¹), followed by CuAl (293.3 mg g⁻¹) and ZnAl (235.3 mg g⁻¹). Reusability studies demonstrated robust cycling performance for CuZnAl, which retained ≈ 95% of its initial removal capacity after five cycles, whereas ZnAl suffered the greatest decline.

Graphical Abstract

本研究采用易溶共沉淀法合成了CuZnAl层状双氢氧化物（LDH）吸附剂，并对其去除典型阴离子偶氮染料甲基橙（MO）的效果进行了评价。通过XRD、FTIR、BET、SEM等综合表征，证实成功制备出了具有有序叠层、介孔结构和片状形貌的相纯碳酸盐型LDHs。CuZnAl具有最高的BET表面积（45 m2 g−1）和最大的总孔容（0.432 cm3 g−1），具有优异的吸附性能。批处理实验表明，所有吸附剂在酸性pH下的去除率最高，在pH为3时CuZnAl的MO去除率达到≈100%。吸附动力学服从拟二阶模型（R2 > 0.99），表明化学吸附和层间离子交换是主要的吸附机理。Langmuir等温线模型拟合良好（R2 > 0.96）， CuZnAl的最大单层吸附量（q μ l）为392.2 mg g−1，其次为CuAl （293.3 mg g−1）和ZnAl （235.3 mg g−1）。可重用性研究表明，CuZnAl具有良好的循环性能，在5次循环后仍保留了约95%的初始去除能力，而ZnAl的下降幅度最大。图形抽象

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引用次数: 0

Synergistic Role of Micropore Structure and N/O Dual Functional Groups in Enhancing Low-Temperature NH₃-SCR Denitration Over Activated Carbon Catalysts: Structural Evolution and Mechanistic Insights 微孔结构和N/O双官能团在活性炭催化剂上促进NH₃-SCR低温脱硝中的协同作用：结构演化及机理研究

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-09 DOI: 10.1007/s10562-025-05263-7

Jihui Yang, Minghao Shi, Jiahao Zheng, Shule Zhang, Qin Zhong

Ammonia Selective Catalytic Reduction (NH₃-SCR) is highly effective for nitrogen oxide (NO_x) removal, yet its low-temperature activity remains a key limitation for broader applications. We developed an innovative series of microporous N, O-codoped carbon catalysts (NOAC-x) that facilitate the fast SCR reaction. Results demonstrate that the synergy between catalyst micropore structure and surface functional groups governs denitrification performance: Low-temperature calcination induces pore blockage by nitrogen-containing groups (pyridinic N), reducing specific surface area and weakening NH₃/NO adsorption capacity.Moderate calcinatio promotes partial decomposition of nitrogen groups, optimizing the micropore structure while preserving active sites such as carboxyl groups and pyridinic N, thereby significantly enhancing catalytic activity.High-temperature calcinatio triggers pore collapse and decomposition of active groups, degrading performance.NOAC-600 achieved 95% NO_x conversion at 120 °C and exhibited merely a 2% activity decline during a 108-hour stability test. This work provides theoretical guidance for designing microporous N, O-dual-doped carbon-based catalysts and underscores the critical importance of micropore structure and surface chemistry optimization in low-temperature SCR technology.

Graphical Abstract

氨选择性催化还原（NH₃-SCR）对去除氮氧化物（NOx）非常有效，但其低温活性仍然是广泛应用的一个关键限制。我们开发了一系列创新的微孔N， o共掺杂碳催化剂（NOAC-x），促进快速SCR反应。结果表明，催化剂微孔结构和表面官能团之间的协同作用决定了脱硝性能：低温煅烧导致含氮基团（吡啶N）堵塞孔，降低比表面积，削弱NH₃/NO的吸附能力。适度煅烧促进了氮基团的部分分解，优化了微孔结构，同时保留了羧基和吡啶N等活性位点，从而显著提高了催化活性。高温煅烧引发孔隙崩塌和活性基团分解，性能下降。NOAC-600在120°C下达到95%的NOx转化率，在108小时的稳定性测试中仅表现出2%的活性下降。该研究为设计N， o双掺杂碳基微孔催化剂提供了理论指导，并强调了微孔结构和表面化学优化在低温SCR技术中的重要性。图形抽象

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引用次数: 0

A Highly Efficient and Recyclable Magnetic Nanoparticle Anchored Platinum Complex Catalyzed Hydrosilylation of Olefins 高效可回收磁性纳米粒子锚定铂配合物催化烯烃硅氢化反应

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-09 DOI: 10.1007/s10562-025-05257-5

Changjiang Xu, Yuke Yang, Yuxiang Li, Ling Li, Dong Liu, Qiu Zeng, Shengyong You

A commercially available nitrogen/phosphino-functionalized triethoxysilane was grafted onto the surface of silica-coated magnetic nanoparticles (MNPs, Fe₃O₄@SiO₂) via etherification, affording a series of nitrogen/phosphino-functionalized MNPs (Fe₃O₄@SiO₂-N/P). Subsequent reaction with chloroplatinic acid yielded a series of platinum(II)-anchored functionalized MNPs (Fe₃O₄@SiO₂-N/P-H₂PtCl₆). When these complexes were tested in the hydrosilylation of olefins, the phosphine-modified MNP-chelated platinum catalyst (Fe₃O₄@SiO₂-P2-H₂PtCl₆) was identified as the optimal catalyst. It efficiently promoted the hydrosilylation of olefins under mild conditions, accommodating a broad range of olefins and silanes to afford the corresponding products in moderate to excellent yields and regioselectivity. Moreover, the catalyst could be easily recovered via an external magnetic field and reused for at least nine cycles without significant loss of catalytic activity.

Graphical Abstract

将一种市购的氮/磷酸基功能化三乙氧基硅烷通过醚化接枝到二氧化硅包覆的磁性纳米颗粒（MNPs, Fe₃O₄@SiO₂）表面，得到一系列氮/磷酸基功能化MNPs （Fe₃O₄@SiO₂-N/P）。随后与氯铂酸反应生成一系列铂（II）锚定的功能化MNPs （Fe3O4@SiO2-N/P-H2PtCl6）。当这些配合物在烯烃的硅氢化反应中进行测试时，确定了磷化氢修饰的mnp螯合铂催化剂（Fe3O4@SiO2-P2-H2PtCl6）是最佳催化剂。它在温和的条件下有效地促进了烯烃的硅氢化反应，容纳了广泛的烯烃和硅烷，以中等至优异的收率和区域选择性提供相应的产品。此外，催化剂可以很容易地通过外部磁场回收，并且可以重复使用至少9个循环，而不会显著损失催化活性。图形抽象

{"title":"A Highly Efficient and Recyclable Magnetic Nanoparticle Anchored Platinum Complex Catalyzed Hydrosilylation of Olefins","authors":"Changjiang Xu, Yuke Yang, Yuxiang Li, Ling Li, Dong Liu, Qiu Zeng, Shengyong You","doi":"10.1007/s10562-025-05257-5","DOIUrl":"10.1007/s10562-025-05257-5","url":null,"abstract":"<div><p>A commercially available nitrogen/phosphino-functionalized triethoxysilane was grafted onto the surface of silica-coated magnetic nanoparticles (MNPs, Fe₃O₄@SiO₂) via etherification, affording a series of nitrogen/phosphino-functionalized MNPs (Fe₃O₄@SiO₂-N/P). Subsequent reaction with chloroplatinic acid yielded a series of platinum(II)-anchored functionalized MNPs (Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>-N/P-H<sub>2</sub>PtCl<sub>6</sub>). When these complexes were tested in the hydrosilylation of olefins, the phosphine-modified MNP-chelated platinum catalyst (Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>-P2-H<sub>2</sub>PtCl<sub>6</sub>) was identified as the optimal catalyst. It efficiently promoted the hydrosilylation of olefins under mild conditions, accommodating a broad range of olefins and silanes to afford the corresponding products in moderate to excellent yields and regioselectivity. Moreover, the catalyst could be easily recovered via an external magnetic field and reused for at least nine cycles without significant loss of catalytic activity.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145729802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Comparative Investigation of Layered Perovskites as Photocatalyst for Degradation of Organic Pollutants Towards Environmental Remediation 层状钙钛矿光催化剂降解有机污染物及环境修复的比较研究

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-09 DOI: 10.1007/s10562-025-05259-3

V. Vidhyasri, Ramadoss Maniganadan, S. Philomina Mary, Pandi Muthirulan, Padmanaban Annamalai, Raji Atchudan, Pramod K. Kalambate, Devaraj Manoj

Bismuth molybdate (Bi₂MoO₆), as one of bismuth-based semiconductors, has aroused great interest in photocatalysis due to its layered structure, tailored morphologies, appropriate band gap, visible-light absorption. Nevertheless, the performance of Bi₂MoO₆ significantly depends on the synthesis approaches that control the phase purity, crystallinity and photocatalytic activity. This work focuses on a detailed investigation about the effects of hydrothermal and solvothermal synthesis approaches on phase evolution, structural features and photocatalytic performance of Bi-based molybdates for the degradation of organic pollutants when subjected to visible light irradiation. The prepared phases were verified by X-ray powder diffraction (XRD) in which hydrothermal process produced α-Bi₂Mo₃O₁₂, whereas solvothermal process resulted in γ-Bi₂MoO₆. When compared with α-Bi₂Mo₃O₁₂, the performance of γ-Bi₂MoO₆ showed improved crystallinity, a medium bandgap (~ 2.3–2.8 eV) and excellent photocatalytic activity with a > 95% degradation of MB within 120 min. The higher performance was ascribed to the enhanced charge separation, extended absorption and definite layered structure. The optimal performance of γ-Bi₂MoO₆ obtained from the solvothermal process demonstrated its potential in visible light-driven water treatment. Therefore, these results collectively reveal that effect of the synthesis process can determine the phase composition and photocatalytic efficiency towards organic pollutants.

Graphical Abstract

The performance of γ-Bi2MoO6 obtained from the solvothermal process demonstrated its potential in visible light-driven water treatment.

钼酸铋（Bi2MoO6）作为铋基半导体的一种，由于其层状结构、可定制的形态、合适的带隙、可见光吸收等特性，在光催化领域引起了人们极大的兴趣。然而，Bi2MoO6的性能在很大程度上取决于控制相纯度、结晶度和光催化活性的合成方法。本文重点研究了水热合成和溶剂热合成方法对铋基钼酸盐在可见光照射下的相演化、结构特征和光催化性能的影响。通过x射线粉末衍射（XRD）对所制备的相进行了验证，水热法制备α-Bi2Mo3O12，溶剂热法制备γ-Bi2MoO6。与α-Bi2Mo3O12相比，γ-Bi2MoO6具有更好的结晶度、中等带隙（~ 2.3 ~ 2.8 eV）和优异的光催化活性，在120 min内可降解MB达95%。其优异的性能主要归功于增强的电荷分离、扩展的吸收和明确的层状结构。通过溶剂热法获得的γ-Bi2MoO6的最佳性能证明了其在可见光驱动水处理中的潜力。因此，这些结果共同揭示了合成过程的影响可以决定相组成和对有机污染物的光催化效率。通过溶剂热法获得的γ-Bi2MoO6的性能证明了其在可见光驱动水处理中的潜力。

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引用次数: 0

Ethylene Polymerization Using α-Diimine Nickel Catalysts with Multiple Hydroxyl Groups and Their Supported Catalysts 多羟基α-二亚胺镍催化剂及其负载催化剂的乙烯聚合

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-09 DOI: 10.1007/s10562-025-05261-9

Lin-Lin Ye, Qin Li, Yan-Hui Hou, Mi-Mi Cui, Bin-Yuan Liu, Min Yang

This study synthesized α-diimine nickel catalysts featuring two and three hydroxyl groups (Cat1 and Cat2), along with their corresponding supported catalysts (S-Cat1 and S-Cat2). These catalysts demonstrated high activity in ethylene polymerization, reaching up to 7 × 10⁶ g/molNi·h, yielding polyethylenes with tunable molecular weights (174–553 kg/mol), branching degrees (38–140/1000 C) and higher elongation at break (up to 1230%). The catalyst bearing three hydroxyl groups and its supported catalyst exhibited slightly higher than that of the catalyst with two hydroxyl groups and its supported catalyst respectively, while also producing polymers with relatively higher molecular weights and slightly lower branching degrees. Compared to the homogeneous catalyst, the supported catalysts maintained high activity and thermal stability, yielding polyethylene with higher molecular weight, controllable morphology, high tensile strength (17.9 MPa/22.5 MPa) and moderate elongation at break (870%/660%).

Graphical Abstract

本研究合成了具有两个和三个羟基（Cat1和Cat2）的α-二亚胺镍催化剂及其相应的负载催化剂（S-Cat1和S-Cat2）。这些催化剂具有较高的乙烯聚合活性，可达到7 × 106 g/molNi·h，生成分子量可调（174-553 kg/mol）、分支度可调（38-140/1000℃）和断裂伸长率可调（高达1230%）的聚乙烯。带有三个羟基的催化剂及其负载催化剂的表现略高于带有两个羟基的催化剂及其负载催化剂，同时也产生相对较高的分子量和稍低的支化度的聚合物。与均相催化剂相比，负载型催化剂保持了较高的活性和热稳定性，得到的聚乙烯分子量更高，形貌可控，抗拉强度高（17.9 MPa/22.5 MPa），断裂伸长率适中（870%/660%）。图形抽象

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引用次数: 0

Development of Selective Catalysts for Hydroprocessing of Phenol Production By-products: Hydroquinone and Catechol 苯酚生产副产物对苯二酚和儿茶酚加氢加工选择性催化剂的研究

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-09 DOI: 10.1007/s10562-025-05265-5

Mariyam Mukhtarova, Maria A. Golubeva, Kirill I. Chernyshev, Alexander L. Vasiliev, Dzhamalutdin N. Ramazanov, Oleg G. Sinyashin, Anton L. Maximov

The development of a selective catalyst for hydroprocessing of phenol production by-products (hydroquinone and catechol) is an important task for increasing the yield of the target product. In this study, the use of in situ generated catalysts based on molybdenum and tungsten compounds (MoP, WP, MoO_x, and WO_x) was proposed for this goal. The performance of the catalysts was investigated in the hydroprocessing of each individual substrate (hydroquinone and catechol), as well as their mixture. It was shown that MoP and WP catalysts were more selective in the partial HDO of hydroquinone and catechol into phenol compared to their oxides; as a result, the selectivity for phenol was higher. The highest selectivity for phenol was 83% and 95% over MoP and WP, respectively. The hydroprocessing of a mixture of phenol, hydroquinone, and catechol (the molar ratio of phenol/hydroquinone/catechol = 7/2/1) was also explored using in situ formed MoP, WP, MoO_x, and WOx catalysts. The phenol content in the product mixture after the reaction changed in the following order: WP (88%) > MoP (75%) > WO_x (55%) > > MoO_x (26%). All catalysts studied were characterized using XRD, XPS, TEM, and EDX methods. Thus, in situ formed MoP and WP can be considered as the suitable catalysts for the selective HDO of hydroquinone and catechol towards phenol. Moreover, the possibility of reusing catalysts MoP and WP during five runs without significant loss of activity was shown.

Graphical Abstract

苯酚生产副产物（对苯二酚和儿茶酚）加氢处理的选择性催化剂的开发是提高目标产品收率的重要任务。在本研究中，提出了基于钼和钨化合物（MoP， WP， MoOx和WOx）的原位生成催化剂的使用。考察了催化剂在加氢处理各底物（对苯二酚和儿茶酚）及其混合物中的性能。结果表明，MoP和WP催化剂对对苯二酚和儿茶酚的部分HDO转化为苯酚具有较强的选择性；结果表明，苯酚的选择性较高。对苯酚的选择性最高，分别比MoP和WP高83%和95%。采用原位形成的MoP、WP、MoOx和WOx催化剂，探索了苯酚、对苯二酚和儿茶酚混合物（苯酚/对苯二酚/儿茶酚的摩尔比= 7/2/1）的加氢处理。反应后产物混合物中苯酚含量的变化顺序为：WP (88%) > MoP (75%) > WOx (55%) > > MoOx（26%）。采用XRD、XPS、TEM和EDX等方法对催化剂进行了表征。因此，原位形成的MoP和WP可以被认为是对苯二酚和儿茶酚对苯酚选择性HDO的合适催化剂。此外，在五次运行中重复使用催化剂MoP和WP的可能性没有明显的活性损失。图形抽象

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引用次数: 0

Correction to: A Multifunctional Pectinase from the Manglicolous Endophytic Fungus, Aspergillus sydowii EF 375: Process Optimization, Characterization and Application Potentials 更正：一种多功能果胶酶，来自Manglicolous内生真菌Aspergillus sydowii EF 375：工艺优化，表征和应用潜力

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-04 DOI: 10.1007/s10562-025-05235-x

M. R. Revathy, Anjali S. Mohan, Dhanya Kesavan, Hafsa Kattatheyil, S. Neelima, M. V. Anju, Rosamma Philip

引用次数: 0

Dual Promotion Strategy for Cobalt-Based Fischer–Tropsch Catalysts: Hydrogen Spillover and Structural Stabilization by Ag and B 钴基费托催化剂的双重促进策略：氢溢出和Ag和B的结构稳定

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters

Pub Date : 2025-12-02 DOI: 10.1007/s10562-025-05249-5

Halime Kord-Tamandani, Younes Ghalandarzehi, Ali Akbar Mirzaei

In this study, the deactivation behavior of three granular catalysts—Co/Ag, Co/Ag-B, and Co/Ag-Zn—was investigated in the Fischer–Tropsch synthesis process. Silver was introduced as a primary promoter to enhance cobalt reducibility and facilitate hydrogen spillover. Characterization results from XRD, TPR, FESEM, and EDS analyses revealed that Ag incorporation led to a moderate reduction in cobalt oxide reduction temperature and improved reduction behavior compared to undoped catalysts. However, the promotion effect of Ag alone was limited. The presence of boron significantly improved cobalt dispersion, decreased crystallite size, and reduced the rate of deactivation. In contrast, the addition of Zn resulted in the formation of more stable oxide phases and more difficult reducibility, leading to a noticeable decline in catalytic activity. The Co/Ag-B catalyst, benefiting from the synergistic effect of Ag and B, exhibited the highest structural stability and the lowest deactivation rate. These findings highlight the critical role of rational promoter design in developing next-generation stable cobalt-based catalysts for Fischer–Tropsch synthesis.

Graphical Abstract

本文研究了Co/Ag、Co/Ag- b和Co/Ag- zn三种颗粒状催化剂在费托合成过程中的失活行为。引入银作为主要促进剂，以提高钴的还原性和促进氢的溢出。XRD、TPR、FESEM和EDS的表征结果表明，与未掺杂的催化剂相比，Ag的掺入导致钴氧化物还原温度适度降低，还原行为得到改善。然而，单独添加Ag的促进作用有限。硼的存在显著改善了钴的分散性，减小了晶体尺寸，降低了失活速率。相比之下，锌的加入导致氧化相的形成更加稳定，还原性更难，导致催化活性明显下降。由于Ag和B的协同作用，Co/Ag-B催化剂表现出最高的结构稳定性和最低的失活率。这些发现强调了合理的启动子设计在开发下一代稳定的钴基费托合成催化剂中的关键作用。图形抽象

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引用次数: 0