Catalysis Letters最新文献_第9页

Investigation on Heterogeneous Catalytic Elimination of Lactones over Supported Magnesium Iodide 碘化镁支撑下的内酯异构催化消除研究

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-09-10 DOI: 10.1007/s10562-024-04803-x

Yue Zhang, Hanjie Zhang, Xufeng Lin, Haiyun Sun

{"title":"Investigation on Heterogeneous Catalytic Elimination of Lactones over Supported Magnesium Iodide","authors":"Yue Zhang, Hanjie Zhang, Xufeng Lin, Haiyun Sun","doi":"10.1007/s10562-024-04803-x","DOIUrl":"10.1007/s10562-024-04803-x","url":null,"abstract":"<div><p>The elimination of lactones is a crucial method for preparing corresponding cycloalkane derivatives, but the commonly used catalyst NaI is unstable and non-recyclable. In this work, reusable MgI<sub>2</sub>@SiO<sub>2</sub> was prepared for heterogeneous catalytic lactone elimination. Cyclopropyl methyl ketone was synthesized from 2-acetyl-γ-butyrolactone using MgI<sub>2</sub>@SiO<sub>2</sub> as a catalyst at 180 °C and 1 atm. The yield and selectivity were both over 99%. The activity of MgI<sub>2</sub>@SiO<sub>2</sub> was estimated to be 11 times that of NaI. The high activity of MgI<sub>2</sub>@SiO<sub>2</sub> is attributed to the Lewis hard acidity of Mg<sup>2+</sup> and the soft basicity of I<sup>−</sup>. The high selectivity of Cyclopropyl methyl ketone comes from the faster reaction rate, and its good stability is due to the strong interactions between Mg<sup>2+</sup> and I<sup>−</sup> with the carrier. This work provides a feasible scheme for the efficient and low-cost elimination synthesis of corresponding cycloalkanes from lactones.</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":"154 12","pages":"6597 - 6605"},"PeriodicalIF":2.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175707","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

Different Mo-Bi Phase Coupled with Fe-Co for Propylene Oxidation to Acrolein 不同的 Mo-Bi 相与 Fe-Co 相耦合用于丙烯氧化成丙烯醛

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-09-10 DOI: 10.1007/s10562-024-04814-8

Xinlong Liu, Xiaoyue Yang, Zhijie Zhang, Huanwen Zhou, Xiaoyuan Liao

{"title":"Different Mo-Bi Phase Coupled with Fe-Co for Propylene Oxidation to Acrolein","authors":"Xinlong Liu, Xiaoyue Yang, Zhijie Zhang, Huanwen Zhou, Xiaoyuan Liao","doi":"10.1007/s10562-024-04814-8","DOIUrl":"10.1007/s10562-024-04814-8","url":null,"abstract":"<div><p>Industrial Bi-Mo-Fe-Co composites catalysts for propylene oxidation, are consist of two main components: Bi-Mo oxidate for propylene activation and Fe-Co oxidate for oxygen activation. But there are three different Bi-Mo crystalline phases, i.e., α-Bi<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub>, β-Bi<sub>2</sub>Mo<sub>2</sub>O<sub>9</sub>, γ-Bi<sub>2</sub>MoO<sub>6</sub>, their role in catalytic oxidation process is unclear. In this paper, above three kinds of Bi-Mo phase are prepared at first, then coupled them respectively with Fe-Co oxidates by ball milling method to manufacture Cat-α, Cat-β, and Cat-γ. It is showed that their catalytic performance for propylene oxidation to acrolein, has the order of Cat-α > Cat-β > Cat-γ, and the Cat-α exhibit the best propylene conversion (90.1%) and highest acrolein selectivity (91.7%). The result shows that Cat-α exhibited a lower redox temperature, and possessed a high O<sub>lattice</sub> content, which benefit to its excellent oxidant ability. Meanwhile, α-Bi<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub> exhibit rich Co<sup>2+</sup>/Co<sup>3+</sup> pairs in Cat-α, prompt oxygen migration efficiency, and had a low interaction with propylene confirmed by DFT calculation, which inhibited the excessive oxidation, benefits to acrolein yield. Our study provides a new insight over Bi-Mo catalyst for selective oxidation.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 12","pages":"6482 - 6493"},"PeriodicalIF":2.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175706","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

Optimizing Electronic Synergy Between Pt Nanoparticle and Co Single Atom to Accelerate the Electrocatalytic Hydrogen Evolution Activity 优化铂纳米粒子和钴单原子之间的电子协同作用以加速电催化氢气转化活性

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-09-10 DOI: 10.1007/s10562-024-04802-y

Ziqi Wang, Pengfei Zhang, Xiaohui Zhao, Yanhui Song, Haixia Zhang, Haojie Liang, Peizhi Liu, Bingshe Xu, Junjie Guo

{"title":"Optimizing Electronic Synergy Between Pt Nanoparticle and Co Single Atom to Accelerate the Electrocatalytic Hydrogen Evolution Activity","authors":"Ziqi Wang, Pengfei Zhang, Xiaohui Zhao, Yanhui Song, Haixia Zhang, Haojie Liang, Peizhi Liu, Bingshe Xu, Junjie Guo","doi":"10.1007/s10562-024-04802-y","DOIUrl":"10.1007/s10562-024-04802-y","url":null,"abstract":"<div><p>Optimizing the electronic structure of an electrocatalyst has been supposed to a valid approach to facilitate the hydrogen evolution reaction (HER) activity. Herein, a core–shell architecture comprising a Pt nanoparticle (NP) encapsulated into single-atomic Co species anchored on nickel iron double layered hydroxide substrate (PtCo–NiFe LDH) was established. The PtCo–NiFe LDH catalyst displays the remarkable electrocatalytic HER performance (29 mV@10 mA cm<sup>−2</sup>), better than the NiFe LDH (183 mV@10 mA cm<sup>−2</sup>) and commercial Pt/C (30 mV@10 mA cm<sup>−2</sup>). In addition, it also possesses excellent stability for up to 25 h, and the morphology and structure have hardly undergone any significant changes. It is supposed that the efficient electronic relation between Pt NP and atomically-distributed Co site on NiFe LDH could give rise to plentiful active sites and enhanced conductivity, and thus raise excellent catalytic properties. This work would improve the design and construction of efficient electrocatalysts for a sustainable green energy system.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div><p>The acquired PtCo-NiFe LDH has been successfully prepared and used as HER electrocatalyst</p></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 12","pages":"6351 - 6358"},"PeriodicalIF":2.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175715","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

Controlling Carrier Separation by Ag2S Decoration on P-CdS Nanorods for Enhanced Photocatalytic Hydrogen Evolution 通过在 P-CdS 纳米棒上装饰 Ag2S 来控制载流子分离，从而提高光催化氢气转化率

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-09-07 DOI: 10.1007/s10562-024-04794-9

Cuina Yang, Jun Wu

{"title":"Controlling Carrier Separation by Ag2S Decoration on P-CdS Nanorods for Enhanced Photocatalytic Hydrogen Evolution","authors":"Cuina Yang, Jun Wu","doi":"10.1007/s10562-024-04794-9","DOIUrl":"10.1007/s10562-024-04794-9","url":null,"abstract":"<div><p>The separation of photo-generated carriers in heterojunctions plays a crucial role in regulating the built-in electric field. The design of materials with directional migration characteristics inside the bulk phase and at the interface between the two phases is of great significance for studying photocatalytic hydrogen evolution. The P-CdS/Ag<sub>2</sub>S composite photocatalytic system prepared in this study was doped with P element by heating CdS and NaH<sub>2</sub>PO<sub>2</sub> in a muffle furnace, resulting in the directed migration of photo-generated charges in the prepared sample driven by an internal electric field. By in-situ deposition of Ag<sub>2</sub>S on the surface of P-CdS, a Janus heterojunction was prepared to enhance the transfer of charge carriers at the phase interface. The hydrogen evolution rate of P-CdS/Ag<sub>2</sub>S is 12.44 mmol·h<sup>−1</sup>·g<sup>−1</sup>, which is 30 times higher than that of the previously prepared pure CdS sample (0.411 mmol·h<sup>−1</sup>·g<sup>−1</sup>). This significant improvement in photocatalytic performance is attributed to the doping of P element and the in-situ loading of Ag<sub>2</sub>S co-catalyst, which together promote the effective separation and transport of photogenerated charge carriers, thereby enhancing the photocatalytic activity of the material. This work is of great significance for exploring the charge-directed transfer problem of sulfide photocatalysts in the field of photocatalytic hydrogen evolution.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 11","pages":"6157 - 6167"},"PeriodicalIF":2.3,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175716","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

Low Ag concentration Ag/CeO2 catalysts prepared with various CeO2 precursors in carbon monoxide oxidation reaction 一氧化碳氧化反应中使用各种 CeO2 前驱体制备的低银浓度 Ag/CeO2 催化剂

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-09-04 DOI: 10.1007/s10562-024-04774-z

Elena Y. Liberman, Elena I. Suvorova, Alexander Y. Vasil’kov, Anastasiia A. Voronova, Alexander. Y. Pereyaslavtsev, Tatiana V. Kon’kova

{"title":"Low Ag concentration Ag/CeO2 catalysts prepared with various CeO2 precursors in carbon monoxide oxidation reaction","authors":"Elena Y. Liberman, Elena I. Suvorova, Alexander Y. Vasil’kov, Anastasiia A. Voronova, Alexander. Y. Pereyaslavtsev, Tatiana V. Kon’kova","doi":"10.1007/s10562-024-04774-z","DOIUrl":"10.1007/s10562-024-04774-z","url":null,"abstract":"<div><p>Ag/CeO<sub>2</sub> catalysts for the CO oxidation reaction were synthesized by the metal-vapor method. Highly dispersed cerium dioxide used as a carrier was obtained by precipitation of Ce<sup>+3</sup> ions with various (NH<sub>4</sub>OH, (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub> and H<sub>2</sub>C<sub>2</sub>O<sub>4</sub>) precipitators and subsequent calcination in an oxidizing atmosphere. CeO<sub>2</sub> particles were formed with different morphologies depending on the precipitator used. When using NH<sub>4</sub>OH, mainly spheroidal particles are formed, while the shape of platelets is typical for the use of H<sub>2</sub>C<sub>2</sub>O<sub>4</sub>. The samples were characterized by EDX, SEM, TEM, XPS, low-temperature nitrogen adsorption. Catalytic testing of the samples was carried out in an oxidation reaction using gas chromatography. It was found that the catalytic activity of the samples decreases in a series Ag/CeO<sub>2carb</sub> > Ag/CeO<sub>2oxal</sub> > Ag/CeO<sub>2hydr.</sub> Ag/CeO<sub>2oxal</sub> catalysts demonstrated relatively high activity and the most stable operation over 10 cycles.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 11","pages":"6144 - 6156"},"PeriodicalIF":2.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175717","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

Insight into the Interaction of Perovskite-Like Surfaces (LaMnO3 and LaCoO3) with Ar, H2, CO, and O2 through NAP-XPS Analysis 通过 NAP-XPS 分析深入了解类透镜表面（LaMnO3 和 LaCoO3）与 Ar、H2、CO 和 O2 的相互作用

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-08-17 DOI: 10.1007/s10562-024-04778-9

Juan Tapia-P., Jaime Gallego, Oscar Gamba, Juan F. Espinal

{"title":"Insight into the Interaction of Perovskite-Like Surfaces (LaMnO3 and LaCoO3) with Ar, H2, CO, and O2 through NAP-XPS Analysis","authors":"Juan Tapia-P., Jaime Gallego, Oscar Gamba, Juan F. Espinal","doi":"10.1007/s10562-024-04778-9","DOIUrl":"10.1007/s10562-024-04778-9","url":null,"abstract":"<div><p>Perovskite-like oxides present huge chemical variability and a wide range of applications as catalysts for oxidation reactions. The interaction of several small gas molecules with the surface of LaCoO<sub>3</sub> and LaMnO<sub>3</sub> perovskite-like oxides was studied by Near Ambient Pressure X-ray photoelectron spectroscopy (NAP-XPS) and CO Temperature Programmed Desorption (CO-TPD). Surface chemical changes such as the O<sub>surf</sub>/O<sub>lattice</sub> and cation B oxidation state ratios were analyzed as a function of temperature (400 K, 450 K, 500 K, 550 K, and 650 K) under different gas atmospheres like Ar, CO, H<sub>2</sub>, and O<sub>2</sub>. It was found that there was a partial surface reduction when H<sub>2</sub> and CO were used in the reaction, and therefore, the cation B oxidation state (Mn<sup>4+</sup>/Mn<sup>3+</sup> and Co<sup>3+</sup>/Co<sup>2+</sup>) ratio decreased. Under the CO stream, carbonate species were formed, presenting a C1s signal between 284.5 eV and 287 eV. The CO<sub>2</sub> evolution during the reaction at temperatures greater than 500 K was associated with CO activation over or near to surface oxygen species. A Mars-van Krevelen mechanism was proposed for the process, finding significant differences between LaCoO<sub>3</sub> and LaMnO<sub>3</sub> perovskite-like solid catalysts behavior.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 11","pages":"6133 - 6142"},"PeriodicalIF":2.3,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10562-024-04778-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-Linear Arrhenius Behavior of m-Cresol Hydrogenation over Platinum 间甲酚在铂上的非线性阿伦尼乌斯氢化行为

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-08-17 DOI: 10.1007/s10562-024-04776-x

Nhung N. Duong, Camila A. Teles, Fabio B. Noronha, Daniel E. Resasco

{"title":"Non-Linear Arrhenius Behavior of m-Cresol Hydrogenation over Platinum","authors":"Nhung N. Duong, Camila A. Teles, Fabio B. Noronha, Daniel E. Resasco","doi":"10.1007/s10562-024-04776-x","DOIUrl":"10.1007/s10562-024-04776-x","url":null,"abstract":"<div><p>The hydrogenation of m-cresol was studied across a wide temperature range, revealing complex variations in product distribution and reaction mechanisms. It has been found that the hydrogenation process predominantly yields 3-methylcyclohexanone and 3-methylcyclohexanol as primary products through ring hydrogenation (HYD) within the 140–250 ℃ temperature range. Conversely, the hydrodeoxygenation (HDO) products, toluene and methylcyclohexane, remain insignificant. More interestingly, the HYD yield is observed to diminish at elevated temperatures, with HDO becoming more dominant beyond 270 ℃. Further exploration of potential factors influencing the observed reduction in HYD yield at elevated temperatures—namely site deactivation, equilibrium limitations, and variations in surface coverage—revealed that changes in the surface adsorption of m-cresol play a critical role in the observed decrease in HYD activity, rather than site deactivation or equilibrium constraints. The order of 3-methylcyclohexanone formation with respect to m-cresol increases from 0 to 1 across the examined temperature range, suggesting m-cresol adsorption follows a simple Langmuir–Hinshelwood adsorption model where <span>(r sim k{K}_{C}{P}_{C}/(1+{K}_{C}{P}_{C}))</span>. This analysis not only advances our understanding of the temperature-dependent behavior in m-cresol hydrogenation but also lays the groundwork for future kinetic modeling, offering deeper insight into the complex dynamics of m-cresol hydrogenation.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 11","pages":"6123 - 6132"},"PeriodicalIF":2.3,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175728","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

Preparation of Hydrotalcite/SBA-15 Composite Catalyst and its Application in the Synthesis of ε-Caprolactone 氢化亚铜/SBA-15 复合催化剂的制备及其在ε-己内酯合成中的应用

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-08-14 DOI: 10.1007/s10562-024-04763-2

Sijia Wang, Yanchun Zheng, Meidong Lang

{"title":"Preparation of Hydrotalcite/SBA-15 Composite Catalyst and its Application in the Synthesis of ε-Caprolactone","authors":"Sijia Wang, Yanchun Zheng, Meidong Lang","doi":"10.1007/s10562-024-04763-2","DOIUrl":"10.1007/s10562-024-04763-2","url":null,"abstract":"<div><p>Polycaprolactone (PCL) is a highly regarded biodegradable and environmentally friendly material that is extensively researched and applied in the field of biomedicine due to its exceptional biodegradability, biocompatibility, and other advantageous properties. The monomer ε-Caprolactone (ε-CL) plays a critical role in the synthesis of PCL, making it a key focus of study. This paper describes the preparation of hydrotalcite HT-Zn and SBA-15 through simple synthetic methods, and the subsequent creation of a hydrotalcite/SBA-15 composite catalyst, named HT-Zn/SBA-15, through a post-generation approach combining hydrotalcite and SBA-15. Scanning electron microscopy (SEM), wide-angle X-ray diffraction (XRD), and infrared spectroscopy (FT-IR) were employed to analyze the structures of the synthesized materials. The catalytic effects in Baeyer–Villiger oxidation were then investigated to examine the impact of various catalysts, solvents, and reaction conditions. The results indicated that utilizing HT-Zn/SBA-15 as the catalyst, acetonitrile as the solvent, and H<sub>2</sub>O<sub>2</sub> as the oxidant, led to a conversion rate of cyclohexanone exceeding 80% and a selectivity of ε-CL surpassing 90% under the ideal reaction conditions. Additionally, the catalyst demonstrated excellent reusability, being able to be reused up to six times.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 11","pages":"6094 - 6105"},"PeriodicalIF":2.3,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175729","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

Hydroconversion of Guaiacol Family Molecules Over Platinum Catalysts Based on Porous Aromatic Frameworks 基于多孔芳香族框架的铂催化剂对愈创木酚家族分子的加氢转化

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-08-14 DOI: 10.1007/s10562-024-04793-w

Leonid A. Kulikov, Maria A. Bazhenova, Iuliia S. Bolnykh, Anton L. Maximov, Eduard A. Karakhanov

{"title":"Hydroconversion of Guaiacol Family Molecules Over Platinum Catalysts Based on Porous Aromatic Frameworks","authors":"Leonid A. Kulikov, Maria A. Bazhenova, Iuliia S. Bolnykh, Anton L. Maximov, Eduard A. Karakhanov","doi":"10.1007/s10562-024-04793-w","DOIUrl":"10.1007/s10562-024-04793-w","url":null,"abstract":"<div><p>In this work hydrodeoxygenation of various lignin-derived model compounds and their mixture was studied over platinum catalysts based on porous aromatic frameworks (PAF) doped with Bronsted acid sites. Two catalysts, Pt-PAF-30-SO<sub>3</sub>H(5.0) and Pt-PAF-30-SO<sub>3</sub>H(7.5), with almost identical platinum loading of 5.1 and 4.7 wt. % but different sulfur concentration of 4.46 and 6.96 wt. % respectively, were synthesized using a method that allows to obtain highly uniform distribution of nanoparticles in the porous structure of the support. The HDO reaction pathways of lignin substrates with different structures were discussed, and the influence of the platinum source chosen for the synthesis of the catalyst on the activity and the selectivity of the latter was studied. We have demonstrated high stability of catalyst (for at least a 7 h reaction) and have confirmed the great activity of the Pt-PAF-30-SO<sub>3</sub>H(7.5) catalyst in HDO reactions with a large number of lignin bio-oil model compounds. Pt-PAF-30-SO<sub>3</sub>H(7.5) was also tested in the hydrodeoxygenation of a model mixture of aromatic substrates taken in proportions contained in lignin bio-oil. The selectivity to naphthenic hydrocarbons—products of the complete hydrodeoxygenation—was 54%.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 11","pages":"6106 - 6122"},"PeriodicalIF":2.3,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142175730","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

Micro-Cu Doped Co3O4 as an Effective Oxygen Reduction Nano-flower-like Catalyst to Enhance the Power Output of Air Cathode Microbial Fuel Cell 微掺铜 Co3O4 作为一种有效的氧还原纳米花状催化剂提高空气阴极微生物燃料电池的功率输出

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-08-12 DOI: 10.1007/s10562-024-04779-8

Cheng Li, Yao Yang, Jinrong Lu, Linde Ren, Xiayan Zhang, Cong Li, Xuan Yang, Yao Xiang, Hua Liu

{"title":"Micro-Cu Doped Co3O4 as an Effective Oxygen Reduction Nano-flower-like Catalyst to Enhance the Power Output of Air Cathode Microbial Fuel Cell","authors":"Cheng Li, Yao Yang, Jinrong Lu, Linde Ren, Xiayan Zhang, Cong Li, Xuan Yang, Yao Xiang, Hua Liu","doi":"10.1007/s10562-024-04779-8","DOIUrl":"10.1007/s10562-024-04779-8","url":null,"abstract":"<div><p>Air cathode microbial fuel cell (MFC) can use the biological activities of microorganisms to convert organic matter into ideal electrical energy, but this efficiency has not been satisfactory. The air cathode requires an optimal catalyst to enhance the power output of the MFC by improving its low oxygen reduction reaction (ORR) activity. Micro Cu-doped Co<sub>3</sub>O<sub>4</sub> nano-flower-like catalyst is successfully synthesized in this study using a metal-organic framework as the precursor material. The addition of 5% Cu induces a higher concentration of oxygen vacancies, thereby optimizing the local electronic state of the active site and enhancing the catalytic performance for oxygen reduction in the 5% Cu-Co<sub>3</sub>O<sub>4</sub> material. Consequently, when equipped with this material, the power output of the air cathode MFC is approximately 2.85 times greater than that achieved with pure Co<sub>3</sub>O<sub>4</sub>. This provides a novel design idea for the application of nano-flower-like transition metal oxygen reduction catalysts in MFC.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 11","pages":"6080 - 6093"},"PeriodicalIF":2.3,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945560","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