Catalysis Today最新文献

{"title":"Strategies to enhance the (C9-C16) range sustainable aviation fuel selectivity in Fischer-Tropsch synthesis","authors":"Ahmad Mukhtar,&nbsp;Ekow Agyekum-Oduro,&nbsp;Sidra Saqib,&nbsp;Sarah Wu","doi":"10.1016/j.cattod.2025.115606","DOIUrl":"10.1016/j.cattod.2025.115606","url":null,"abstract":"<div><div>Fischer-Tropsch synthesis (FTS) is a promising route for producing sustainable aviation fuel (SAF) by converting syngas derived from renewable sources into hydrocarbons within the jet fuel range (C₉-C₁₆). However, controlling product selectivity remains challenging due to the conventional Anderson-Schulz-Flory (ASF) distribution, which favors a broad hydrocarbon distribution. This review critically examines various experimentally demonstrated strategies to enhance and narrow the SAF selectivity in FTS. Key approaches include adjusting catalyst redox characteristics, modifying the reduction environment, optimizing metal-support interactions, shifting reaction equilibrium, and incorporating suitable promoters. Furthermore, syngas feed dilution with CO₂ have been explored as additional means to suppress methane formation and maximize mid-distillate production. These strategies and machine learning collectively contribute to overcoming ASF limitations, enabling a more targeted synthesis of jet fuel-range hydrocarbons while improving overall process efficiency. By refining these approaches, FTS can be further optimized to support the transition toward cleaner and more sustainable aviation fuels.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"463 ","pages":"Article 115606"},"PeriodicalIF":5.3,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of hollow silica spheres with radially oriented mesopores to microreactors for two-phase reactions heated by microwave irradiation","authors":"Masaki Okamoto ,&nbsp;Hiroaki Ueda ,&nbsp;Shuntaro Tsubaki ,&nbsp;Yuji Wada","doi":"10.1016/j.cattod.2025.115595","DOIUrl":"10.1016/j.cattod.2025.115595","url":null,"abstract":"<div><div>Hollow silica spheres with radially oriented mesopores were used as microreactors for the two-phase reaction of the aldol condensation of butanal. The hollow spheres filled with 2 M sulfuric acid as a catalyst, which served as an aqueous phase, were added to the heptane solution of butanal, which served as an organic phase, and the mixture was heated at 95ºC. The reaction rate was higher than that of the emulsive two-phase reaction without the use of the hollow spheres because the droplets in the emulsion were larger than the hollow spheres. When microwave heating was used, the reaction rate increased compared with that when conventional heating was applied at the same temperature of the reaction mixture. Only the aqueous phase in the hollow spheres, where the reaction proceeded, was selectively heated by microwave irradiation because water effectively absorbs microwaves, whereas heptane cannot.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"463 ","pages":"Article 115595"},"PeriodicalIF":5.3,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism of synthesizing hexaniobate cluster by microwave-assisted hydrothermal reaction","authors":"Nattamon Panichakul ,&nbsp;Hiroki Nagakari ,&nbsp;Soichi Kikkawa ,&nbsp;Shuntaro Tsubaki ,&nbsp;Kotaro Higashi ,&nbsp;Tomoya Uruga ,&nbsp;Hideyuki Kawasoko ,&nbsp;Seiji Yamazoe","doi":"10.1016/j.cattod.2025.115593","DOIUrl":"10.1016/j.cattod.2025.115593","url":null,"abstract":"<div><div>Anionic hexaniobate clusters [Nb₆O₁₉]^8 −, which act as a superbase catalyst, could be synthesized by the microwave-assisted hydrothermal method at 180℃ within 10 min with high purity, whereas the conventional hydrothermal synthesis method requires a long reaction time (&gt;24 h). In this study, the mechanism of synthesizing [Nb₆O₁₉]⁸⁻ by the microwave-assisted hydrothermal method was investigated by <em>in situ</em> quick-scan X-ray absorption fine structure and electrospray ionization time-of-flight mass spectroscopy. This revealed rapid [Nb₆O₁₉]⁸⁻ nucleation along with dissolution of Nb₂O₅∙<em>n</em>H₂O accompanied by the formation of mononuclear Nb species at 160℃. The unveiled mechanistic insights provide the controllability in products during microwave-assisted hydrothermal synthesis of polyoxoniobate clusters.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"463 ","pages":"Article 115593"},"PeriodicalIF":5.3,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reductive support effect of titanium suboxides on oxidation state and catalytic performance of TiOx-supported CoOx for hydrodeoxygenation of anisole","authors":"Weizhou Sun ,&nbsp;Shuhei Shimoda ,&nbsp;Yuichi Kamiya ,&nbsp;Ryoichi Otomo","doi":"10.1016/j.cattod.2025.115591","DOIUrl":"10.1016/j.cattod.2025.115591","url":null,"abstract":"<div><div>In this study, several titanium suboxides containing Ti^3 + (Ti₂O₃, Ti₃O₅, Ti₄O₇, and hydrogenated TiO₂) were synthesized by reducing TiO₂ using TiH₂ or H₂ as reducing agent, and these materials were used as support for CoO_<em>x</em> catalysts. The structure, reduction properties, and catalytic performance of these catalysts for the hydrodeoxygenation (HDO) of anisole were compared, and the effect of the reducing properties of the titanium suboxide support on the oxidation state of CoO_<em>x</em> species and catalytic performance was investigated. Redox reactions occurred between these titanium suboxides and the supported CoO_<em>x</em> species, and as a result, CoO_<em>x</em> was supported in a reduced state. As the proportion of Ti³⁺ in the titanium suboxides increased, the reduction of CoO_<em>x</em> proceeded more progressively, and CoO_<em>x</em> species were reduced to a near metallic state. The progressive reduction of CoO_<em>x</em> increased the catalytic activity of the supported CoO_<em>x</em> for the HDO reaction and also improved the catalytic lifetime. This study demonstrated that titanium suboxides with low mean titanium valence played an indirect role in improving the catalytic performance of the supported CoO_<em>x</em> by promoting the reduction of CoO_<em>x</em>.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"463 ","pages":"Article 115591"},"PeriodicalIF":5.3,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Catalytic activity of germanosilicate zeolites in the aerobic oxidation of cyclohexene: Effect of Ge ‘open’ sites","authors":"Paula Sánchez-Morena ,&nbsp;Jaime Jurado-Sánchez ,&nbsp;Carlos Márquez-Álvarez ,&nbsp;Virginia Martínez-Martínez ,&nbsp;Joaquín Pérez-Pariente ,&nbsp;Luis Gómez-Hortigüela","doi":"10.1016/j.cattod.2025.115596","DOIUrl":"10.1016/j.cattod.2025.115596","url":null,"abstract":"<div><div>In this work we disclose for the first time the catalytic activity of Ge in germanosilicate zeolites for the aerobic oxidation of cyclohexene. Our results show that Ge in the -ITV framework displays a higher catalytic activity than Ge in the BEC framework, despite having a similar Ge content. This must be related to the different configuration of Ge in both frameworks, since Ge in -ITV locates preferably in interrupted ≡T-OH Q3 positions, similar to the more active ‘open’ sites of Ti(IV) and Sn(IV) in zeolites, while in the BEC framework Ge is in Q4 ‘closed’ configuration. Interestingly, pre-treatment of both calcined germanosilicate materials with 1-butanol results in a notable improvement of the catalytic activity, especially in terms of a reduction of the induction period. A detailed spectroscopic study reveals a special interaction of cyclohexene with ≡Ge-OH interrupted sites in the -ITV framework, displaying two types of interactions, through H-bonding and through a direct interaction with Ge. Moreover, cyclohexene is shown to form some type of complex with Ge sites in both BEC and -ITV frameworks, but they show a different nature as revealed by their distinct UV absorption bands, suggesting that Ge is able to pre-activate in some way cyclohexene for the oxidation reaction.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"463 ","pages":"Article 115596"},"PeriodicalIF":5.3,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biodiesel production through the esterification of palm oil effluent using sulfonated MIL-101(Cr) catalyst using linkers derived from PET plastic waste","authors":"Yasin Khani ,&nbsp;Fatemeh Khani-Aghesmaeili ,&nbsp;Behzad Valizadeh ,&nbsp;Bo Sung Kang ,&nbsp;Kanghee Cho ,&nbsp;Young-Kwon Park","doi":"10.1016/j.cattod.2025.115584","DOIUrl":"10.1016/j.cattod.2025.115584","url":null,"abstract":"<div><div>Palm oil fatty acid distillate (PFAD), a byproduct of crude palm oil refining, has gained interest as a biodiesel feedstock. Concurrently, the growing accumulation of PET waste poses serious environmental challenges. In this study, sulfonated metal-organic frameworks (MOF) using linkers derived from PET waste were employed as catalysts for PFAD esterification using various alcohols. When methanol was employed as the solvent, high free fatty acid (FFA) conversions (∼100 %) were consistently observed within the temperature range of 60–120 °C. In contrast, FFA conversion increased significantly with ethanol and isopropanol at elevated temperatures, reaching 99.4 % and 99.7 % at 90 °C and 120 °C, respectively, due to enhanced molecular interactions. This enhancement is attributed to improved solvation effects and increased molecular mobility, which facilitate esterification at higher temperatures. Higher alcohol chain length negatively impacted esterification efficiency due to increased activation energy. A greater catalyst-to-feedstock (C/F) ratio also improved conversion. The sulfonic acid group (SO₃H) content in MOFs played a crucial role: the MCS30 catalyst (30 % SO₃H linker) yielded the highest FFA conversions with methanol, ethanol and isopropyl alcohol, followed by the 20 % and 10 % counterparts. This is attributed to the abundance of Brønsted acid sites facilitating proton donation during the reaction. MCS30 Catalyst also exhibited excellent reusability, with the FFA conversion dropping only slightly from 99.7 % to 95.2 % over four cycles. Overall, this approach offers a dual environmental benefit: mitigating PET plastic waste and enabling sustainable biodiesel production via PFAD esterification.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"463 ","pages":"Article 115584"},"PeriodicalIF":5.3,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Topology-acidity-catalytic activity interplay in hierarchical nanolayered aluminosilicate zeolites for Friedel-Crafts alkylation","authors":"Oleksiy V. Shvets ,&nbsp;Mykhailo M. Kurmach ,&nbsp;Michal Mazur ,&nbsp;Petr Golis ,&nbsp;Pavlo S. Yaremov ,&nbsp;Oleg Petrov ,&nbsp;Nataliya D. Shcherban ,&nbsp;Jiři Čejka ,&nbsp;Mariya V. Shamzhy","doi":"10.1016/j.cattod.2025.115580","DOIUrl":"10.1016/j.cattod.2025.115580","url":null,"abstract":"<div><div>Nanolayered zeolites are at the forefront of research as efficient catalysts for reactions involving bulky molecules. To date, various zeolites have been synthesized in nanolayered form <em>via</em> direct hydrothermal crystallization using Gemini-type surfactants, and their enhanced catalytic performance has been demonstrated in acid-catalyzed transformations of bulky substrates. However, the influence of zeolite topology on the strength and coordination environment of surface acid sites and its effect on catalytic behavior remains insufficiently understood. This study explores topology-acidity-activity relationships using a series of nanolayered aluminosilicate zeolites with FER, MFI, MOR, and BEA topologies in the alkylation of mesitylene with benzyl alcohol as a surface-acid-site-sensitive model reaction. <em>In situ</em> FTIR-monitored thermodesorption of substituted pyridines showed comparable surface Brønsted acid strength across the zeolites, while ²⁷Al MAS NMR spectroscopy revealed a topology-dependent increase in fraction of distorted tetrahedral Al sites: MFI (21 %) &lt; FER (30 %) &lt; MOR (57 %) &lt; BEA (64 %). Catalytic activity increased with surface-accessible Brønsted acid site concentration (mmol/g) or density (mmol/m²) in nanolayered MFI, FER, and MOR, with FER showing the highest yield (37 %) and selectivity (84 %). This trend was disrupted in BEA, which, despite the reasonably high surface Brønsted acid site concentration, showed lower activity. The findings of this study highlight the impact of topology-dependent structural features on catalytic performance of nanolayered zeolites.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"463 ","pages":"Article 115580"},"PeriodicalIF":5.3,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low dimensional inorganic materials as electrocatalysts: Experimental and theoretical perspectives","authors":"Ranjit Thapa ,&nbsp;Uttam Kumar Ghorai ,&nbsp;Ramendra Sundar Dey ,&nbsp;Puru Jena ,&nbsp;Yoshiyuki Kawazoe","doi":"10.1016/j.cattod.2025.115581","DOIUrl":"10.1016/j.cattod.2025.115581","url":null,"abstract":"","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115581"},"PeriodicalIF":5.3,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of zeolite hydrophilicity and hydrophobicity on water-assisted polyethylene hydrocracking","authors":"Taeeun Kwon ,&nbsp;Jaewoo Kim ,&nbsp;Ki Hyuk Kang ,&nbsp;Wangyun Won ,&nbsp;Insoo Ro","doi":"10.1016/j.cattod.2025.115578","DOIUrl":"10.1016/j.cattod.2025.115578","url":null,"abstract":"<div><div>The catalytic upcycling of polyethylene (PE) remains a major challenge in sustainable waste management. This study demonstrates that water promotes PE hydrocracking over Ru/zeolite catalysts only when the support framework is strongly hydrophilic, as in HY and HMOR. Systematic characterization reveals that this promotional effect is governed by surface wettability, rather than acidity or metal dispersion. Thermodynamic analysis confirms that water and PE are immiscible under reaction conditions, ruling out direct water–polymer interactions. Instead, water preferentially associates with hydrophilic catalyst surfaces, promoting Brønsted acid activity through confined hydration. Controlled experiments show that direct contact between water and the catalyst is essential for enhanced reactivity; spatial separation between the two leads to suppressed conversion, likely due to unfavorable interactions between water and the molten polymer. These findings highlight the mechanistic role of interfacial water–catalyst accessibility and establish catalyst hydrophilicity as a key design parameter for reliable and efficient water-assisted hydrocracking. The results have practical implications for processing moisture-containing plastic waste streams.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115578"},"PeriodicalIF":5.3,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cyclometalated dinuclear iridium(III) complex with 2,2'-bipyridyl-based bridging ligand as a photosensitizer for photochemical hydrogen evolution reaction","authors":"Junya Omaki,&nbsp;Natsumi Yano,&nbsp;Yusuke Kataoka","doi":"10.1016/j.cattod.2025.115579","DOIUrl":"10.1016/j.cattod.2025.115579","url":null,"abstract":"<div><div>A new cyclometalated dinuclear iridium complex with a 1,2-bis(4′-methyl-2,2'-bipyridin-4-yl)ethane (bmbe) bridging ligand, [Ir₂(ppy)₄(bmbe)](PF₆)₂ (<strong>IrPS-D</strong>; ppy = 2-phenylpyridinate), which is anticipated to function as a highly efficient photosensitizer (PS) for the photochemical hydrogen evolution reaction, is synthesized and structurally characterized via ¹H NMR, ESI-TOF-MS, ATR-FT-IR, elemental analysis, and single crystal X-ray diffraction analyses. The combination of spectroscopic analysis and time-dependent density functional theory calculations clarifies that (i) the visible-light absorption spectrum of <strong>IrPS-D</strong> exhibits a shape and excitation features almost identical to those of [Ir(ppy)₂(dmbpy)]PF₆ (<strong>IrPS-M</strong>; dmbpy = 4,4<em>'</em>-dimethyl-2<em>,2′</em>-bipyridine), which is a well-known promising PS for the photochemical hydrogen evolution reaction and mononuclear counterpart of <strong>IrPS-D</strong>, whereas the spectral intensity of <strong>IrPS-D</strong> is approximately twice as high as that of <strong>IrPS-M</strong>; (ii) the emission energies of <strong>IrPS-D</strong> and <strong>IrPS-M</strong> are nearly identical; however, <strong>IrPS-D</strong> exhibits a slightly shorter emission lifetime and higher quantum yield compared with those of <strong>IrPS-M</strong>, resulting in relatively faster radiative and non-radiative rate constants for <strong>IrPS-D</strong> compared with those of <strong>IrPS-M</strong>; and (iii) the excited state of <strong>IrPS-D</strong> is quenched by triethylamine (TEA) faster than that of <strong>IrPS-M</strong>. Upon visible-light irradiation, <strong>IrPS-D</strong> serves as a highly efficient PS for the photochemical hydrogen evolution reaction in the presence of K₂PtCl₄ and TEA, which function as the hydrogen evolution catalyst and sacrificial electron donor, respectively. The maximum turnover number (TON_PS) of <strong>IrPS-D</strong> for hydrogen evolution is 2672, which is approximately 4.75 times greater than that of <strong>IrPS-M</strong> (TON_PS = 563) under the same reaction conditions.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115579"},"PeriodicalIF":5.3,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}