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{"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":"2026-03-01","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 enhancement on nanowire-engineered thermally stable oxide-metal inverse catalysts","authors":"Gyuho Han ,&nbsp;Seongsu Choi ,&nbsp;Hee Chan Song ,&nbsp;Gyu Rac Lee ,&nbsp;Jaebeom Han ,&nbsp;Pyeonghwa Lee ,&nbsp;Jaeho Kim ,&nbsp;Han-Koo Lee ,&nbsp;Si Woo Lee ,&nbsp;Yeon Sik Jung ,&nbsp;Jeong Young Park","doi":"10.1016/j.cattod.2025.115612","DOIUrl":"10.1016/j.cattod.2025.115612","url":null,"abstract":"<div><div>The interface between metal and oxide plays a critical role in heterogeneous catalysis. In this study, we fabricated model inverse catalysts by transferring oxide nanowire assemblies of Co₃O₄, CeO₂, and TiO₂ onto Pt films to construct structurally well-defined oxide-metal interfaces. The deposited oxide nanowires retained their morphology without noticeable diffusion or sintering during annealing and carbon monoxide oxidation, as confirmed by near-edge X-ray absorption fine structure analysis. The surface electronic structure and morphology of the Pt film also remained largely unchanged, preserving the oxide-metal interfaces, which exhibited significant enhancements in turnover frequencies, depending on the oxide composition. These results highlight the utility of oxide nanowires in constructing thermally stable and composition-tunable oxide-metal interfaces for catalytic systems.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"463 ","pages":"Article 115612"},"PeriodicalIF":5.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145359567","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":"2026-03-01","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":"Highly durable carbon-encapsulated Pt nanoparticles for low-Pt-loading fuel cells","authors":"Donglai Li ,&nbsp;Yuanzhe Ma ,&nbsp;Hongmin Sun ,&nbsp;Ziliang Deng ,&nbsp;Haibo Jin ,&nbsp;Zipeng Zhao","doi":"10.1016/j.cattod.2025.115639","DOIUrl":"10.1016/j.cattod.2025.115639","url":null,"abstract":"<div><div>Proton exchange membrane fuel cells (PEMFCs) hold significant promise as clean energy conversion devices; however, their widespread adoption is constrained by the rapid degradation of catalysts under operating conditions. Herein, we report a convenient and scalable approach that significantly enhances catalyst durability via controlled carbon encapsulation through methane decomposition. The optimized Pt@C/XC540 retained 62.3 % of its initial mass activity after a 30,000-cycle accelerated durability test (ADT), outperforming the uncoated Pt/XC (36.5 %), and surpassing the 60 % retention target set by the U.S. Department of Energy (DOE). When this strategy was extended to catalysts loaded on porous carbon support, Pt@C/BP2K delivered a rated power of 15.1 W/mg_PGM. More importantly, the Pt@C/BP2K catalyst exhibited outstanding stability, retaining 94.7 % of its rated power after 30,000-cycle ADT, markedly outperforming commercial Pt/C (33.1 %) and uncoated Pt/BP2K (87.4 %). And, its voltage loss at 0.8 A/cm² was only 1.7 mV, less than 5.7 % of the voltage loss DOE target (30 mV), demonstrating the superior stability of Pt@C/BP2K. Transmission electron microscopy showed that pore confinement and carbon encapsulation effectively suppress Pt nanoparticle coarsening. By converting methane-derived carbon into a protective layer, this strategy produces highly durable Pt catalysts without sacrificing performance, offering a cost-effective route for next-generation electrochemical energy conversion technologies.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"465 ","pages":"Article 115639"},"PeriodicalIF":5.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734683","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":"Selective leaching method for the regeneration of vanadium-contaminated FCC catalysts","authors":"Deok Woo Kim,&nbsp;Na Yeon Kim,&nbsp;Dong Seop Choi,&nbsp;Jiyull Kim,&nbsp;Ji Bong Joo","doi":"10.1016/j.cattod.2025.115616","DOIUrl":"10.1016/j.cattod.2025.115616","url":null,"abstract":"<div><div>Metal contaminant accumulation, particularly vanadium, in fluid catalytic cracking (FCC) catalysts significantly reduces their activity and efficiency. Washing and recycling processes are effective and economical methods for not only removal of metal contaminant but also catalyst regeneration. In this work, we investigated leaching behavior of vanadium species from a simulated spent FCC catalyst by varying leaching agents and compared both characteristics and cracking performances. A simulated spent catalyst was prepared by contaminating the synthesized zeolite-based catalysts with vanadium via wet impregnation under a high-temperature steam environment to mimic regenerator conditions. The resulting contaminated catalyst, VC-FCC, was leached with both acidic (HCl and AcOH) and alkaline (NaOH and NH₃(aq)) solutions. It is investigated that the selective vanadium leaching, and facile catalyst regeneration can be suitable by alkaline solution based leaching method. The NH₃ (aq) leached catalyst exhibited a conversion and gasoline yield up to 2.74 (87.1 %) and 1.37 (25.9 %) times higher, respectively, than other leached catalysts using leaching agents. Thus, NH₃ (aq) leaching is an effective method for regenerating contaminated FCC catalysts, making it suitable for sustainable catalyst management in gasoline production.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"463 ","pages":"Article 115616"},"PeriodicalIF":5.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145413389","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":"Efficient and cost-effective electrocatalysts for coproduction of formate through electrocatalytic oxidation of PET-derived ethylene glycol coupled with CO2 reduction","authors":"Yan Fang ,&nbsp;Chengcheng Cai ,&nbsp;Hiromi Yamashita ,&nbsp;Xufang Qian ,&nbsp;Yixin Zhao","doi":"10.1016/j.cattod.2025.115544","DOIUrl":"10.1016/j.cattod.2025.115544","url":null,"abstract":"<div><div>Electrocatalytic CO₂ reduction reaction (CRR) to produce value-added chemicals offers a sustainable strategy to address energy crisis and climate change. However, the conventional CRR is always coupled with the anodic oxygen evolution reaction (OER), suffering from large overpotential, and high energy consumption. To overcome this, we proposed an alternative system by pairing CRR with the electrocatalytic oxidation of ethylene glycol (EGOR), a product derived from the depolymerization of polyethylene terephthalate (PET) plastic waste. This novel coupled system enabled the simultaneous production of formate on both electrodes, achieving the dual utilization of plastic waste and CO₂. In this study, we developed a commercially viable system combining a robust NiOOH electrocatalyst synthesized through a facile electrodeposition for EGOR with a low-cost Bi₂O₃ electrocatalyst for CRR. The NiOOH electrocatalyst achieved Faradaic efficiencies over 88 % for EG oxidation into formate within a broad potential window (1.4–1.8 V_RHE), while Bi₂O₃ delivered Faradaic efficiencies more than 90 % for CO₂-to-formate conversion within −0.8 to −1.2 V_RHE. When integrated in a two-electrode configuration, the EGOR/CRR system produced formate at both electrodes with Faradaic efficiencies above 85 % across a wide cell voltage (2.0–2.6 V), requiring a ∼300 mV lower cell potential compared to the OER/CRR system. This coupled system reached commercial-level current densities above 200 mA cm⁻² or 400 mA cm⁻² at 3.0 V when implemented in the flow cell or the MEA cell, respectively. These results demonstrated the potential to use waste-derived reactants and commercially accessible eletrocatalytsts to realize energy-efficient and scalable conversion into formate.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115544"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997646","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":"Optimizing structural properties of zeolite support to enhance branched isomer yield in gasoline range in Fischer-Tropsch synthesis reaction","authors":"Jeong-Chul Kim ,&nbsp;Daeyoung Bae ,&nbsp;Subin Son ,&nbsp;Junsang Lee ,&nbsp;Shin Hyuk Kim ,&nbsp;Doyeon Lee ,&nbsp;Joo-Il Park ,&nbsp;Kyung Duk Kim ,&nbsp;Kanghee Cho","doi":"10.1016/j.cattod.2025.115549","DOIUrl":"10.1016/j.cattod.2025.115549","url":null,"abstract":"<div><div>In Fischer-Tropsch synthesis reaction using cobalt nano-catalyst, the role of zeolite nanosponge containing Brønsted-Lowry acid sites at mesopore walls was revealed to be important to enhance the yield of isomer hydrocarbon in gasoline range. The acid sites on the external surface where the product shows facile diffusion facilitate isomerization action and cracking. By performing systematic investigation, we confirmed that the yield of branched isomers in gasoline range (<em>i</em>-C_5–11) gradually increases with increasing the external surface area of the <strong>MFI</strong> zeolite. This result indicates that the large external surface area is good for high dispersion of cobalt nanoparticles and high concentration of the external acid sites, consequently advantageous to form <em>i</em>-C_5–11. Meanwhile, the <em>i</em>-C_5–11 selectivity is varied significantly with respect to the acid concentration; the optimal Si/Al ratio, which determines the concentration of Brønsted-Lowry acid sites, was found to be 50, yielding a maximum <em>i</em>-C_5–11 fraction of 25.6 %. Consequently, the zeolite <strong>MFI</strong> nanosponge synthesized using di-quaternary ammonium surfactant, with Si/Al = 50 is the most suitable supporting material for Co nanoparticles in Fischer-Tropsch synthesis reaction for the purpose producing high-value gasoline fuels.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115549"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145020273","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":"2026-02-01","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":"Effect of A-site substitution for Pt supported La0.8A0.2FeO3 perovskite for aqueous-phase aerobic oxidation of ethylene glycol to glycolic acid using O2","authors":"Seungdon Kwon,&nbsp;Nagyeong Kim,&nbsp;Hyeonji Yeom,&nbsp;Hanbit Jang,&nbsp;Kyungsu Na","doi":"10.1016/j.cattod.2025.115548","DOIUrl":"10.1016/j.cattod.2025.115548","url":null,"abstract":"<div><div>Selective oxidation of biomass-derived polyols into value-added chemicals is a promising strategy for sustainable chemical production. Among these, ethylene glycol (EG) serves as a versatile platform molecule due to its simple structure and dual hydroxyl functionality. In this study, a series of perovskite-type oxides with the general formular of La_0.8A_0.2FeO₃ (A = Mg, Ca, Sr, Ba) was synthesized and impregnated with 1 wt% Pt to investigate structure–activity relationships in the aerobic oxidation of EG to glycolic acid (GA). Physicochemical characterizations using XPS, H₂-TPR, O₂-TPO, and ethanol chemisorption revealed that A-site substitution significantly affected Pt dispersion, oxidation state, and oxygen vacancy concentration. Notably, Sr-substituted catalysts exhibited high EG conversion and GA selectivity under both pressurized and ambient conditions, which was attributed to the presence of metallic Pt⁰, abundant oxygen vacancies, facile oxygen activation, and enhanced interaction with –OH containing reactants. These findings propose the critical role of A-site engineering in tailoring perovskite-supported Pt catalysts and provide valuable insights into the rational design of heterogeneous oxidation catalysts for polyol upgrading.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115548"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046885","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":"LaFe1-xMnxO3−δ as effective redox catalysts for CO2 splitting and methane partial oxidation in a cyclic redox scheme","authors":"Sherafghan Iftikhar ,&nbsp;William Martin ,&nbsp;Andrew Pedersen,&nbsp;Sam Portillo,&nbsp;Junchen Liu,&nbsp;Fanxing Li","doi":"10.1016/j.cattod.2025.115546","DOIUrl":"10.1016/j.cattod.2025.115546","url":null,"abstract":"<div><div>The current study reports LaFe_1-xMn_xO_3−δ redox catalysts (RCs) for CO₂-splitting and methane partial oxidation (CH₄-POx) in a cyclic redox scheme. Lanthanum (La) was chosen as the A-site cation whereas iron (Fe) and manganese (Mn) were chosen as the B-site cations, respectively. La, Fe, and Mn were incorporated into the perovskite structure (LaFe_1-xMn_xO_3−δ) at various Fe/Mn ratios to tailor the equilibrium oxygen partial pressures for CO₂-splitting and methane partial oxidation. Compared to the standalone redox pairs of Fe and Mn (i.e., Fe₂O₃/Fe₃O₄, Fe₃O₄/FeO, and Mn₂O₃/Mn₃O₄) which, from a thermodynamic standpoint, favor the complete combustion of CH₄, the perovskite structured redox catalysts (RCs, i.e., LaFe_1-xMn_xO_3−δ) favored the selective oxidation of CH₄ to syngas. In addition, impregnating the RCs with 1 wt% ruthenium (Ru) led to a significant improvement in their redox kinetics without affecting their redox thermodynamics. The Ru-impregnated, perovskite structured RCs (i.e., LaFeO₃, LaFe_0.625Mn_0.375O₃, and LaFe_0.5Mn_0.5O₃ ) exhibited excellent redox performance in terms of the syngas yield (92 – 100 %) and CO₂ conversion (95–98 %). Long-term redox testing over Ru-impregnated LaFeO₃ and LaFe_0.5Mn_0.5O₃ demonstrated relatively stable performance for 100 redox cycles whereas activity loss was observed for LaFe_0.625Mn_0.375O₃, LaFe_0.375Mn_0.625O_3, and LaMnO₃ respectively. Among RCs containing both Mn and Fe, LaFe_0.5Mn_0.5O₃ exhibited the best performance, maintaining satisfactory activity over 100 cycles and higher oxygen capacity. XRD and XPS analysis suggest that the ability to regenerate the perovskite phase under a CO₂ environment and a near surface A:B site cation ratio close to the perovskite stoichiometry would likely correspond to more stable performance. Additionally, the inclusion of Mn on the B-site enhances the coke resistance of the redox catalyst when compared to undoped LaFeO₃.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"462 ","pages":"Article 115546"},"PeriodicalIF":5.3,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046887","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}