Catalysis Letters最新文献_第10页

Ni-Bi-Mo/Al2O3 Metal-Oxide Catalysts for CO2-Mediated Oxidative Dehydrogenation of n-Butane into Buta-1,3-diene: Mutual Influence of Components Ni-Bi-Mo/Al2O3金属氧化物催化剂对co2介导的正丁烷氧化脱氢生成丁烷-1,3-二烯的影响

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-07-05 DOI: 10.1007/s10562-025-05107-4

Olga V. Larina, Oksana V. Zikrata, Olexandra P. Pertko, Ivan M. Remezovskyi, Yurii M. Nychiporuk, Pavlo I. Kyriienko, Sergiy O. Soloviev

{"title":"Ni-Bi-Mo/Al2O3 Metal-Oxide Catalysts for CO2-Mediated Oxidative Dehydrogenation of n-Butane into Buta-1,3-diene: Mutual Influence of Components","authors":"Olga V. Larina, Oksana V. Zikrata, Olexandra P. Pertko, Ivan M. Remezovskyi, Yurii M. Nychiporuk, Pavlo I. Kyriienko, Sergiy O. Soloviev","doi":"10.1007/s10562-025-05107-4","DOIUrl":"10.1007/s10562-025-05107-4","url":null,"abstract":"<p>Ni-Bi-Mo/Al<sub>2</sub>O<sub>3</sub> metal-oxide systems are prepared by co-impregnation of γ-Al<sub>2</sub>O<sub>3</sub> with water-soluble salts of Ni, Bi, and Mo and are investigated as catalysts for CO<sub>2</sub>-mediated oxidative dehydrogenation of <i>n</i>-butane into buta-1,3-diene. The structure, morphology, reducibility, re-oxidizing ability, and acid-base properties of the metal-oxide systems have been studied using XRD, SEM-EDX, low-temperature (-196℃) N<sub>2</sub> ad(de)sorption, Raman spectroscopy, TPR, TPRO, and TPD-NH<sub>3</sub>/CO<sub>2</sub> techniques. TPSR-MS measurements with pre-adsorbed <i>n</i>-butane and butenes have been conducted to assess the possibilities of the individual stages of <i>n</i>-butane dehydrogenation on the sample’s surface. The adsorption and activation of alkanes on the surface are proposed to be the rate-determining steps of the process. Lewis acid-base pair sites of weak and medium strength, formed with the participation of nickel and molybdenum, are suggested to promote the dehydrogenation reaction. The dehydrogenation of <i>n</i>-butane into mono- and di-olefins is significantly enhanced by the active sites formed with the participation of nickel. The addition of molybdenum to the catalyst composition results in the formation of active oxygen-containing sites that can abstract hydrogen from the alkene molecule. The higher rate of buta-1,3-diene formation achieved on the Ni-Mo/Al<sub>2</sub>O<sub>3</sub> catalyst results from the synergistic effect of nickel- and molybdenum-containing active sites.</p>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161860","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

Enhance the Activity of CO2 Hydrogenation to Methanol Over La2O3 Promoted In2O3-ZrO2 Catalysts La2O3促进的In2O3-ZrO2催化剂提高CO2加氢制甲醇的活性

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-07-04 DOI: 10.1007/s10562-025-05083-9

Runqin Chen, Wei Na, Xiangying Wang, Xingpeng Sun, Xinyu Ling, Jianyu Li, Wengui Gao

{"title":"Enhance the Activity of CO2 Hydrogenation to Methanol Over La2O3 Promoted In2O3-ZrO2 Catalysts","authors":"Runqin Chen, Wei Na, Xiangying Wang, Xingpeng Sun, Xinyu Ling, Jianyu Li, Wengui Gao","doi":"10.1007/s10562-025-05083-9","DOIUrl":"10.1007/s10562-025-05083-9","url":null,"abstract":"<div><p>In this study, indium–zirconium catalysts with varying levels of lanthanum doping were synthesized via a hydrothermal method to evaluate their performance in the hydrogenation of carbon dioxide to methanol. To elucidate the effects of lanthanum incorporation, a comprehensive set of characterization techniques and catalytic evaluations was employed to examine structural modifications, surface properties, and catalytic activity. The results demonstrate that optimal lanthanum doping significantly improves both activity and selectivity, achieving a maximum space–time yield of 7.22 mmol·h<sup>− 1</sup>·g<sub>cat</sub><sup>−1</sup>. Detailed analyses revealed the influence of lanthanum on crystal phase composition, specific surface area, reducibility, adsorption behavior, and surface elemental distribution. A potential reaction mechanism is also proposed. This work provides valuable insights into the rational design of high-performance catalysts for CO₂ hydrogenation to methanol.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161904","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

Synthesis and Efficacy of ZnO-CuO Piezoelectric Catalysts: A Cost-Effective Catalysts for Efficient Degradation of Organic Pollutants and Antibacterial in Water ZnO-CuO压电催化剂的合成与效能：高效降解水中有机污染物和抗菌的高性价比催化剂

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-07-02 DOI: 10.1007/s10562-025-05102-9

Longhao Xiao, Wenxia Ma, Haibo Li, Yunzi Yu, Shuming Liu, Xianglong Zeng, Zheng Fang, Kai Yao, Zhenhui Hu, Yongsheng Yang, Hongjun Liu, Corresponging Yongsheng Yang

{"title":"Synthesis and Efficacy of ZnO-CuO Piezoelectric Catalysts: A Cost-Effective Catalysts for Efficient Degradation of Organic Pollutants and Antibacterial in Water","authors":"Longhao Xiao, Wenxia Ma, Haibo Li, Yunzi Yu, Shuming Liu, Xianglong Zeng, Zheng Fang, Kai Yao, Zhenhui Hu, Yongsheng Yang, Hongjun Liu, Corresponging Yongsheng Yang","doi":"10.1007/s10562-025-05102-9","DOIUrl":"10.1007/s10562-025-05102-9","url":null,"abstract":"<div><p>The degradation of organic pollutants has become a focal point due to environmental concerns and practical considerations. In this study, a cost-effective and efficient ZnO piezoelectric catalyst doped with CuO was synthesized through an in-situ method. The research highlights the exceptional degradation effectiveness of the ZnO-CuO piezoelectric catalyst across various zinc-copper ratios, with the optimum catalytic activity achieved at a 1:1 ratio. Degradation experiments using organic dyes (Methylene Blue, Congo Red, and Rhodamine B) revealed impressive results, with methylene blue exhibiting a degradation rate of approximately 90% after 90 min under magnetic stirring at room temperature in a dark environment. Electrochemical impedance spectroscopy (EIS) analysis suggested that the catalyst’s high piezoelectric activity can be attributed to its low charge carrier transfer resistance, facilitating the kinetic process of charge carrier separation. Furthermore, the catalyst exhibited notable antibacterial inhibition capabilities. The synthesis of ZnO-CuO piezoelectric catalysts on a large scale offers a promising, economical, and efficient approach for water quality remediation.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161266","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

Understanding Contributions of Silanols Over Ag/USY Catalysts in Selective Oxidation of 5-Hydroxymethylfurfural 硅烷醇在Ag/USY催化剂上对5-羟甲基糠醛选择性氧化的贡献

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-07-01 DOI: 10.1007/s10562-025-05088-4

Xueqin Ma, Liuwei Shen, Gaolei Shi, Xingguang Zhang

{"title":"Understanding Contributions of Silanols Over Ag/USY Catalysts in Selective Oxidation of 5-Hydroxymethylfurfural","authors":"Xueqin Ma, Liuwei Shen, Gaolei Shi, Xingguang Zhang","doi":"10.1007/s10562-025-05088-4","DOIUrl":"10.1007/s10562-025-05088-4","url":null,"abstract":"<div><p>The selective oxidation of 5-hydroxymethylfurfural (HMF) to value-added products plays an important role in biomass catalytic transformation, which essentially depends upon design of highly efficient and selective catalysts. This study aims to identify contributions of silanols (Si-OH groups) on Ag/USY catalysts to regulating catalytic performances in selective oxidation of HMF to HMFCA (5-hydroxymethyl-2-furancarboxylic acid), by means of aluminium tri-sec-butoxide (AlBO) modification to suppress Si-OH groups of USY and 2,6-di-tert-butylpyridine (2,6-DTBPy) selective poison to shield Brønsted acid sites in the reaction system. The catalysts are characterized by XRD, BET, TEM, XPS and FT-IR to examine the crystal structures, surface areas, porosity, morphology, Ag distribution, chemical states, and surface adsorptive properties. The HMF conversion (44-49.2%) slightly changes with increasing AlBO content, whereas the HMFCA selectivity gradually goes down from 56.2 to around 22.1% and the levulinic acid (LA) selectivity minorly raises from 5.6 to 12.8%. The production of LA originates from enhanced Brönsted acid sites after AlBO modification, and the decline of HMFCA selectivity is principally attributed to the suppression of Si-OH groups that weakens the interaction between HMF reactants and catalysts. This work provides new insights into the role of surface modification in tailoring metal and zeolite-based catalysts for organic conversions.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160646","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

Role of MgAl2O4 and γ-Al2O3 Supports in Modulating Oxygen Activity of LaFeO3 for Methane Oxidation MgAl2O4和γ-Al2O3载体在调节LaFeO3氧化甲烷氧活性中的作用

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-07-01 DOI: 10.1007/s10562-025-05091-9

Minsu Park, Hyemin An, Siwon Lee

{"title":"Role of MgAl2O4 and γ-Al2O3 Supports in Modulating Oxygen Activity of LaFeO3 for Methane Oxidation","authors":"Minsu Park, Hyemin An, Siwon Lee","doi":"10.1007/s10562-025-05091-9","DOIUrl":"10.1007/s10562-025-05091-9","url":null,"abstract":"<div><p>Developing advanced methane conversion catalysts is essential for reducing methane emissions and enhancing gas turbine performance. In this study, LaFeO<sub>3</sub> perovskite catalysts supported on high-surface-area γ-Al<sub>2</sub>O<sub>3</sub> and MgAl<sub>2</sub>O<sub>4</sub> were synthesized via the sol-gel method and evaluated for methane oxidation. Structural and compositional analyses confirmed the successful incorporation of LaFeO<sub>3</sub> on MgAl<sub>2</sub>O<sub>4</sub>, whereas its formation on γ-Al<sub>2</sub>O<sub>3</sub> was limited by interactions with underlying support, leading to secondary phase formation. Quantitative modeling based on rate equations revealed the contributions of two oxygen species (i.e., surface oxygen and lattice oxygen) to the reaction, elucidating catalyst-specific reaction pathways. The MgAl<sub>2</sub>O<sub>4</sub>-supported LaFeO<sub>3</sub> exhibited enhanced methane oxidation performance compared to conventional LaFeO<sub>3</sub> due to the increased participation of both lattice and surface oxygen species in the reaction. In contrast, the γ-Al<sub>2</sub>O<sub>3</sub>-supported LaFeO<sub>3</sub> catalyst performed similarly to bulk LaFeO<sub>3</sub>, likely due to Al-induced secondary phases that suppressed oxygen availability. These findings offer novel insights into optimizing methane oxidation catalysts through rational material design.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160645","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

Sustainable, One-Step Fabrication of 2-Amino-4H-Chromene Analogues Using an Innovative SnO–CeO2 Nanocatalyst 利用创新的SnO-CeO2纳米催化剂可持续一步制备2-氨基- 4h -铬类似物

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-07-01 DOI: 10.1007/s10562-025-05099-1

Avinash Aher, Dnyaneshwar Ghodechor, Manohar Jopale, Vilas Gade, Amol Kategaonkar

{"title":"Sustainable, One-Step Fabrication of 2-Amino-4H-Chromene Analogues Using an Innovative SnO–CeO2 Nanocatalyst","authors":"Avinash Aher, Dnyaneshwar Ghodechor, Manohar Jopale, Vilas Gade, Amol Kategaonkar","doi":"10.1007/s10562-025-05099-1","DOIUrl":"10.1007/s10562-025-05099-1","url":null,"abstract":"<div><p>This study explores a sustainable, efficient, and robust approach for synthesizing 2-amino-4H-chromene derivatives using a novel SnO–CeO<sub>2</sub> nanocatalyst. The synthesis employs a one-pot, three-component reaction involving aromatic aldehydes, malononitrile, and β-naphthol under mild reaction conditions. The SnO–CeO<sub>2</sub> nanocomposite was synthesized via the coprecipitation method and characterized using different techniques, including ultraviolet (UV) spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), high-resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) analysis, X-ray photoelectron spectroscopy (XPS) and Thermogravimetric analysis (TGA) Nanocomposite exhibited exceptional catalytic performance, achieving high product yields (81–96%) with significant reductions in reaction time and energy requirements. Additionally, the catalyst demonstrated excellent recyclability, retaining its activity over six consecutive cycles with minimal loss of efficiency, thereby underscoring its potential for sustainable and environmentally friendly applications. The synthesized 2-amino-4H-chromene derivatives were analysed using <sup>1</sup>H NMR and <sup>13</sup>C NMR spectroscopy, which confirmed their structural integrity and high purity. This methodology represents a green and efficient strategy for producing 2-amino-4H-chromenes, advancing green chemistry principles and promoting sustainable catalysis.</p></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160609","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

Decomposition-Induced Preparation of High-Surface-Area Nb2O5 Materials for Catalytic Transesterification of Ethylene Carbonate to Dimethyl Carbonate 分解诱导制备高表面积Nb2O5材料催化碳酸乙烯酯交换制碳酸二甲酯

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-06-25 DOI: 10.1007/s10562-025-05098-2

Xiao-Yan Wang, Ya-Jing Wang, Lin-Zhi Yu, Fei Wang, Jie Xu, Bing Xue

{"title":"Decomposition-Induced Preparation of High-Surface-Area Nb2O5 Materials for Catalytic Transesterification of Ethylene Carbonate to Dimethyl Carbonate","authors":"Xiao-Yan Wang, Ya-Jing Wang, Lin-Zhi Yu, Fei Wang, Jie Xu, Bing Xue","doi":"10.1007/s10562-025-05098-2","DOIUrl":"10.1007/s10562-025-05098-2","url":null,"abstract":"<div><p>Dimethyl carbonate is a building block in modern chemical synthesis and battery industry. The catalytic transesterification of ethylene carbonate and methanol is a sustainable route for the clean synthesis of dimethyl carbonate. In order to improve the catalytic activity of Nb<sub>2</sub>O<sub>5</sub> materials, a one-pot decomposition-induced preparation approach for high-surface-area Nb<sub>2</sub>O<sub>5</sub> was developed. By incorporation of dicyandiamide and adjustment of calcination temperatures, Nb<sub>2</sub>O<sub>5</sub> materials with various surface areas (47–143 m<sup>2</sup>·g<sup>− 1</sup>) were prepared. Compared with the traditional decomposition method, the synthesized Nb<sub>2</sub>O<sub>5</sub>-CN materials possessed larger surface areas and higher quantities of acidic sites. As heterogeneous catalysts, the Nb<sub>2</sub>O<sub>5</sub>-CN materials demonstrated high activity in the transesterification of EC to DMC. Under the reaction conditions of 140 °C and 4 h, the conversion of EC and the selectivity of DMC reached up to 63.6% and 100%, respectively.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169407","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

Constructing Bi2WO6 with Abundant Crystal Defects for High-Efficiency Photocatalytic Degradation of Tetracycline 构建晶体缺陷丰富的Bi2WO6高效光催化降解四环素

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-06-25 DOI: 10.1007/s10562-025-05042-4

Lan Zhang, Zhipeng Zou, Na Li, Cong Tan, Baofei Hao, Huizhong Ma

{"title":"Constructing Bi2WO6 with Abundant Crystal Defects for High-Efficiency Photocatalytic Degradation of Tetracycline","authors":"Lan Zhang, Zhipeng Zou, Na Li, Cong Tan, Baofei Hao, Huizhong Ma","doi":"10.1007/s10562-025-05042-4","DOIUrl":"10.1007/s10562-025-05042-4","url":null,"abstract":"<div><p>The residual antibiotics in the water environment pose a great threat to the ecological environment and human life safety. However, an effective and environmentally friendly method for degrading antibiotics is still lacking. Herein, a novel Bi<sub>2</sub>WO<sub>6</sub> catalyst with optimized morphology and abundant crystal defects was designed to remove tetracycline. The experimental results showed that the generation of grain boundaries and dislocations were induced through the epitaxial growth method, which endowed Bi<sub>2</sub>WO<sub>6</sub> with rapid separation and transfer of photoinduced electrons. Moreover, the specific surface area and light adsorption capacity of optimized catalyst (0.5Bi-Bi) were significantly improved. As a result, 0.5Bi-Bi exhibited the excellent photocatalytic performance, which degraded 90.78% of TC within 40 min under visible light illumination. Meanwhile, the synthesized 0.5Bi–Bi catalyst has robust photocatalytic stability and sustainability. The capture experiment proved that ⋅O<sub>2</sub><sup>−</sup> was the prime active substance, and a possible mechanism of photodegradation of TC was proposed.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169409","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

Morphological Effect of Ceria Nanomaterials Supported Copper Catalyst on Methanol Steam Reforming for Hydrogen Generation 纳米二氧化铈负载铜催化剂对甲醇蒸汽重整制氢的形态影响

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-06-25 DOI: 10.1007/s10562-025-05094-6

Punampriya Borgohain, Pankaj Tiwari, Rajesh Kumar Upadhyay

{"title":"Morphological Effect of Ceria Nanomaterials Supported Copper Catalyst on Methanol Steam Reforming for Hydrogen Generation","authors":"Punampriya Borgohain, Pankaj Tiwari, Rajesh Kumar Upadhyay","doi":"10.1007/s10562-025-05094-6","DOIUrl":"10.1007/s10562-025-05094-6","url":null,"abstract":"<p>The current work describes the morphological effects of copper ceria catalysts and designs a new class of copper-based ceria catalysts for methanol steam reforming (MSR). The hydrothermal method was implemented to prepare the ceria supports with two different morphologies. Cu/CeO<sub>2</sub> catalysts have been synthesized using deposition precipitation technique. X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, H<sub>2</sub>-TPR, Field emission transmission electron microscopy (FETEM), Energy dispersive X-ray (EDX), X-ray diffraction (XRD), Brunauer-Emmett-Teller surface area analysis (BET), and Field emission scanning electron microscopy (FESEM) techniques were used to characterize the catalyst samples. The study observed that structural morphology, such as rod and cube shapes of ceria, impacts the catalyst activity for methanol steam reforming (MSR). All synthesized catalysts were subjected to catalytic activity testing for a temperature range from 200 to 350 °C. In both catalysts, zero CO selectivity was observed up to 250 °C. XPS data revealed that rod-shaped CeO<sub>2</sub> has abundant surface oxygen vacancies and high surface oxygen mobility, which helps to activate and adsorb water and methanol molecules and create active copper species on the catalyst surface. The correlation between the activity data and catalyst characterization revealed the outstanding reactivity for rod-shaped catalysts.</p>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169410","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

Controllable Encapsulation of Highly Dispersed Pt Clusters in Beta Zeolites 高分散铂簇在沸石中的可控包封

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-06-25 DOI: 10.1007/s10562-025-05093-7

Xin Jiang, Ye Yang, Zhangbing Zhou, Hanbing Song, Jialing Wang, Yucai Qin, Lijuan Song

{"title":"Controllable Encapsulation of Highly Dispersed Pt Clusters in Beta Zeolites","authors":"Xin Jiang, Ye Yang, Zhangbing Zhou, Hanbing Song, Jialing Wang, Yucai Qin, Lijuan Song","doi":"10.1007/s10562-025-05093-7","DOIUrl":"10.1007/s10562-025-05093-7","url":null,"abstract":"<div><p>Metal clusters encapsulated within zeolites are widely utilized in various catalytic processes due to their high metal dispersion and excellent stability. However, the limited and uncontrollable encapsulation of metal content poses significant challenges for further development. To address this issue, this study introduces Sn<sup>2+</sup> into the framework of Beta zeolite to achieve controlled encapsulation of Pt clusters. Multiple characterizations reveal that the Sn species occupy some of the silanol sites or substitute framework Al³⁺ species within the Beta zeolite, predominantly existing in the form of Sn-O-Si. These framework Sn species effectively stabilize the Pt clusters, thereby not only enhancing the dispersion of Pt clusters but also increasing the encapsulation capacity of the Beta zeolite for Pt clusters. By adjusting the amount of Sn added, precise control over the content of encapsulated Pt species in the Beta zeolite can be achieved. Both excessive and insufficient amounts of Sn are detrimental to the encapsulation of Pt clusters, with the optimal encapsulation effect observed when the Pt to Sn ratio is 1:2. This synthesis strategy has been successfully extended to the preparation of Pt clusters encapsulated in Beta zeolite without Al addition. The prepared catalyst demonstrates excellent catalytic activity and remarkable stability in propane dehydrogenation. These findings provide valuable theoretical insights for the design and development of the zeolite-encapsulated metal cluster catalysts.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>The controllable encapsulation of Pt clusters within Beta zeolites was achieved by controlling the incorporation of Sn species into the Beta zeolite framework</p></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169411","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