{"title":"Magnetoelectrodeposited Co-Ni Electrocatalyst on Fe-Modified Ni-Foam for Alkaline Oxygen Evolution Reaction","authors":"Bapi Ghorui, Haribalakrishnammal Vaidyanathan, Isha Singh, Moitrayee Chatterjee, Raj Ganesh S. Pala","doi":"10.1002/cctc.202500516","DOIUrl":"https://doi.org/10.1002/cctc.202500516","url":null,"abstract":"<p>Applying external magnetic field facilitates the oxygen evolution reaction (OER), but such a strategy is impractical for large-scale applications. We introduce a scalable alternative by applying magnetic fields only during catalyst electrodeposition. We further propose a design principle for magnetoelectrocatalyst wherein electrocatalysis of active sites is enhanced by magnetic field impressed in the vicinity of active sites using a less active element having high magnetic saturation. This principle is demonstrated using monometallic systems (FTO/Ni and FTO/Co) and then extended it to develop a multimetallic magnetoelectrodeposited (MED) catalyst (NF/Fe-NiCo-MED). A Fe-modified Ni-foam (NF/Fe) substrate was prepared via galvanic displacement, onto which Ni, Co, or NiCo were electrodeposited under a 0.6 T field. The resulting NF/Fe-NiCo-MED magneto catalysts exhibited enhanced remanence, saturation magnetization, and ECSA and lower charge-transfer resistance compared to counterparts NF/Fe-NiCo-no MED deposited without external magnetic field. The NF/Fe-NiCo-MED demonstrated excellent OER performance, with a low overpotential of 273.26 mV at 100 mA/cm<sup>2</sup> and sustained stability for 72 h in alkaline media. Notably, NF/Fe-NiCo-MED outperforms benchmark NiCo-based layered double hydroxide (LDH) catalysts and even multimetallic systems operated under an external magnetic field during alkaline OER.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 19","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Combination of Two-Enzyme System and Enzyme Engineering Improved the Activity of a New PET Hydrolase Identified from Soil Bacterial Genome","authors":"Hideaki Mabashi-Asazuma, Makoto Hirai, Shigeru Sakurai, Keigo Ide, Masato Kogawa, Ai Matsushita, Masahito Hosokawa, Soichiro Tsuda","doi":"10.1002/cctc.202500364","DOIUrl":"https://doi.org/10.1002/cctc.202500364","url":null,"abstract":"<p>We here report a novel PET hydrolase originating from a soil microbial genome sequence. This enzyme, bbPET0069, exhibits characteristics resembling a cutinase-like Type I PET-degrading enzyme but lacks disulfide bonds. Notably, bbPET0069 displayed remarkable synergy with <i>Candida antarctica</i> lipase B (CALB), demonstrating rapid and efficient PET degradation. To improve the PET degradation activity of bbPET0069, we employed a 3D structural modeling to identify mutation sites around its substrate binding domain combined with a protein language model for effective mutation prediction. Through three initial rounds of directed evolution, we achieved a significant enhancement in PET degradation with CALB, resulting in a 12.6-fold increase compared to wild-type bbPET0069 without CALB. We confirmed its PET degradation activity in PET nanoparticles and films, and our proposed approach enabled efficient PET degradation to terephthalic acid monomers up to 95.5%. Our approach, which integrates a two-enzyme system with protein engineering, demonstrates the potential for enhancing the activity of emerging PET-degradation enzymes, which may possess unique attributes.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 19","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202500364","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ChemCatChemPub Date : 2025-08-05DOI: 10.1002/cctc.202500588
Dr. John R. Lockemeyer, Dr. Tracy L. Lohr, Dr. Michael A. Reynolds, Dr. Alexander van der Made
{"title":"Catalysis for the Energy Transition","authors":"Dr. John R. Lockemeyer, Dr. Tracy L. Lohr, Dr. Michael A. Reynolds, Dr. Alexander van der Made","doi":"10.1002/cctc.202500588","DOIUrl":"10.1002/cctc.202500588","url":null,"abstract":"<p>Society is at a critical juncture regarding the future of energy security. Traditional fossil resources have been execrated while many sustainable alternatives in the energy transition are commercially or economically unfit-for-purpose. While the amalgamation of energy molecules beyond 2050 remains uncertain, catalysis will play a role in how these molecules are produced. The aim of this perspective is to provide a view of where catalysis can impact technologies necessary for the current energy transition from fossil-based sources to renewable ones, with the primary goal being to reduce net carbon dioxide emissions. This discussion focuses on the importance and means to obtain energy carrier molecules, and the challenges associated with producing them by sustainable means. Production of the target molecules will rely upon development of catalysts designed specifically for each application area involved in the energy transition space, with some technology areas requiring more R&D than others. Discussion around specific opportunities and challenges for envisioned catalysts and processes will be presented. Addressing the demand for energy in forms that can be stored and transported(i. e. the concept of molecular energy carriers) is highlighted with special attention given to specific examples. We will demonstrate that regardless of the chosen route to mitigate the CO<sub>2</sub> footprint of current fossil hydrocarbons, catalysts and catalysis will play an essential role.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 16","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ChemCatChemPub Date : 2025-08-05DOI: 10.1002/cctc.202501166
{"title":"Correction to “First Row Transition Metals in Olefin Metathesis: The Role of Iron and Manganese”","authors":"","doi":"10.1002/cctc.202501166","DOIUrl":"10.1002/cctc.202501166","url":null,"abstract":"<p>A. Brotons Rufes, J. P. Martínez, N. Joly, S. Gaillard, J.-L. Renaud, S. Posada Pérez, A. Poater, <i>ChemCatChem</i> <b>2025</b>, <i>17</i>, e00570.</p><p>https://doi.org/10.1002/cctc.202500570</p><p>After publication, it was brought to our attention that the discussion of the article by Lincoln and Iluc, cited as Ref. [92] in our work, was lacking. The supplemented discussion follows:</p><p>The article by Lincoln and Iluc<sup>[92]</sup> reports the metathesis of olefins catalyzed by iron carbene complexes. Here, the authors demonstrate that a pincer-ligated iron complex can form a metallacyclobutane intermediate upon reaction with norbornadiene and its derivatives, validating a key intermediate previously elusive for first-row metal-catalyzed olefin metathesis.</p><p>This study highlights the unique ability of a PC(sp<sup>2</sup>)P iron complex to activate a strained olefin through a [2 + 2] addition to form a well-characterized metallacyclobutane intermediate, which subsequently converts to a ring-opened iron alkylidene. Importantly, the formation and breakdown of this intermediate obeys the classical Chauvin olefin metathesis mechanism, a process previously predominantly associated with late transition metal species.</p><p>The authors provide extensive structural, spectral, and magnetic data to characterize the intermediate, adding credibility to their proposal. The crystallographically defined structures of the metallacyclobutane and its ring-opened counterpart illuminate key bond formations and cleavages that underpin the metathesis process. Furthermore, the observation of a reversible formation of the ring-opened intermediate upon addition of phosphine underscores a delicate thermodynamics that controls this transformation, reflecting the fundamental role of phosphine dissociation in accessing reactive species.</p><p>This work underscores the potential of base metal catalysis in olefin metathesis, a transformation previously thought to be predominantly the domain of 4d and 5d metal species. Importantly, the authors show how careful choice of ancillary pincer and phosphine components can stabilize reactive intermediate species, allowing the observation of key snapshots along the metathesis pathway.</p><p>This study not only expands our understanding of the mechanisms by which first-row metal compounds activate olefins but also paves the way for future exploration of base metal-catalyzed olefin metathesis. The ability to employ iron, a non-precious, abundant, and environmentally friendly metal, to catalyze a transformation previously thought to be the purview of heavy metal species holds promise for developing more sustainable and cost-effective catalytic strategies.</p><p>Overall, this manuscript provides a sophisticated and insightful view into the mechanisms of iron-catalyzed olefin metathesis and highlights the potential for designing base metal catalyzers to perform challenging bond-forming reactions with high selectivity and under mi","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 16","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202501166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ChemCatChemPub Date : 2025-08-05DOI: 10.1002/cctc.202501010
Yuehong Song, Kelin Li, Chaoqin Chen, She Chen, Peng Yang
{"title":"Nickel–Palladium Bimetallic Nanomaterials of Polyoxopalladates as Precursor Loaded on SBA15 for Enhanced Plasma-Assisted Ammonia Synthesis","authors":"Yuehong Song, Kelin Li, Chaoqin Chen, She Chen, Peng Yang","doi":"10.1002/cctc.202501010","DOIUrl":"https://doi.org/10.1002/cctc.202501010","url":null,"abstract":"<p>Bimetallic nanomaterials in conjunction with porous materials have emerged as the most promising catalytic materials for plasma-assisted ammonia synthesis. Adopting appropriate synthesis strategies to regulate the morphology of porous materials and the bimetallic active components is a potential way to further enhance their catalytic performance. However, the role of the morphology and composition of the materials remains unclear. In this study, we synthesize composite catalysts (MnPd<sub>12</sub>/SBA15, CoPd<sub>12</sub>/SBA15, CuPd<sub>12</sub>/SBA15, and NiPd<sub>12</sub>/SBA15) by regulating the morphology of the support mesoporous silica (SBA15) and using polyoxopalladates, which can precisely control molecular structure, as a precursor for bimetallic nanomaterials. Then, the performances of these catalysts for plasma-assisted ammonia synthesis are investigated. The results show that the NiPd<sub>12</sub>/SBA15 composite catalyst has the highest ammonia synthesis yield, with a sample of 85 mg achieving an ammonia concentration up to 9070 ppm, and the energy consumption is as low as 77.75 MJ/mol. Additionally, it demonstrates good stability in cyclic experiments. The synergistic effect of SBA15 and NiPd<sub>12</sub> enables the NiPd<sub>12</sub>/SBA15 catalyst to significantly enhance the yield of ammonia synthesis. It is due to the ability of NiPd<sub>12</sub> metals to stabilize the dissociation state of N<sub>2</sub>, while having a relatively weak affinity for NH<sub>x</sub> intermediates. This facilitates the desorption of NH<sub>3</sub> from the catalyst surface.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 19","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ChemCatChemPub Date : 2025-08-05DOI: 10.1002/cctc.202500702
Ainur Slamova, Dr. Kristina A. Gudun, Dr. Andrey Y. Khalimon
{"title":"Homogeneous Base-Metal-Catalyzed Transfer Hydrogenation of Unsaturated N-Containing Organic Compounds","authors":"Ainur Slamova, Dr. Kristina A. Gudun, Dr. Andrey Y. Khalimon","doi":"10.1002/cctc.202500702","DOIUrl":"10.1002/cctc.202500702","url":null,"abstract":"<p>Owing to the synthetic availability of imines, N-heteroarenes, nitriles, carboxamides, and nitroarenes, their catalytic hydrogenation is considered an attractive and atom-economical route to a diversity of amines, which find widespread applications specialty chemical industries. Although catalytic hydrogenation of unsaturated N-containing organic compounds with compressed H<sub>2</sub> gas is well-established, such transformations require expensive high-pressure equipment and have associated H<sub>2</sub> handling risks. In contrast, transfer hydrogenation protocols utilize nongaseous hydrogen sources, offering significant advantages in the operational cost and safety of transformations. Whereas many economical nonprecious metal catalysts have been described for efficient transfer hydrogenation of aldehydes and ketones, similar systems for selective transfer hydrogenation of unsaturated nitrogen-containing organic compounds have been developed relatively recently. This review aims to highlight current advances and challenges of base-metal-catalyzed (i.e., Mn, Fe, Co, Ni, and Cu) transfer hydrogenation of imines, N-heteroarenes, nitriles, nitro compounds, as well as carboxamides and related molecules to the corresponding amines. Mechanistic aspects of catalytic reactions, the substrate scope, and selectivity of the transformations are also discussed.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 17","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ChemCatChemPub Date : 2025-08-05DOI: 10.1002/cctc.202500900
Lei Sun, Weijia Li, Wanjin Yan, Hai-Bing Cheng, Zhi Chen, Cong-Ming Tang, Li Chang, Jun-Qiang Xu
{"title":"Highly Efficient Photocatalytic Hydrogen Evolution of Flower Shaped MoS2-pCN Composite Supported on Foam Nickel","authors":"Lei Sun, Weijia Li, Wanjin Yan, Hai-Bing Cheng, Zhi Chen, Cong-Ming Tang, Li Chang, Jun-Qiang Xu","doi":"10.1002/cctc.202500900","DOIUrl":"https://doi.org/10.1002/cctc.202500900","url":null,"abstract":"<p>Currently, energy crisis and environmental crisis are the primary threats facing humanity, and the introduction of solar energy for photocatalytic hydrogen evolution is one of the effective ways to solve these two problems. In this study, the protonated carbon nitride (pCN) which was protonated by hydrochloric acid and molybdenum disulfide (MoS<sub>2</sub>) composites were loaded on foam nickel as the photoanode driving the photoelectrocatalytic (PEC) system and used for hydrogen evolution reaction. The research results show that the hydrogen evolution performance of the photoelectrode is optimal when the mass ratio of MoS<sub>2</sub> to pCN is 1:1. Electrochemical performance studies have shown that the initial overpotential for hydrogen evolution is 0.167 V, and a small amount of loading can increase chemical activity by 23 times. The strong stability was verified through CP testing for 10 hand CV cycling for 3000 cycles. At the same time, it was found that protonation treatment with hydrochloric acid not only helps to strip bulk nitride carbon and load composite materials, but also reduces the bandgap and promotes the improvement of light absorption capacity.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 19","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ChemCatChemPub Date : 2025-08-05DOI: 10.1002/cctc.202500973
Lisa De Vriendt, Dr. Ibrahim Khalil, Matthew Victor Hickson, Prof. Dr. Ir. Bert Sels, Prof. Dr. Ir. Michiel Dusselier
{"title":"Selective Homogeneous Monohydrogenation of Muconic Acid and Muconates via Ru-Catalyzed Transfer Hydrogenation","authors":"Lisa De Vriendt, Dr. Ibrahim Khalil, Matthew Victor Hickson, Prof. Dr. Ir. Bert Sels, Prof. Dr. Ir. Michiel Dusselier","doi":"10.1002/cctc.202500973","DOIUrl":"https://doi.org/10.1002/cctc.202500973","url":null,"abstract":"<p>The hydrogenation of muconic acid (MA), a biobased platform molecule, offers a sustainable pathway to adipic acid (AA), a key industrial dicarboxylic acid. In this study, we explore the catalytic transfer hydrogenation (CTH) of muconic acid and muconates using ionic ruthenium complexes. Unlike previous approaches, our method aims to selectively hydrogenate MA toward the monounsaturated compound hexenedioic acid (HDA) or its ester. Alcohols (methanol and ethanol) are employed as a hydrogen donor, providing a safer and more moderate alternative to H<sub>2</sub> gas. Using hydrated RuCl<sub>3</sub> as the catalyst, the reaction successfully produces HDA, with no over-hydrogenation toward AA observed. The resulting product mixture comprises up to four different HDA isomers, which were all identified and distinguished by GC, GC-MS-FID, and <sup>1</sup>H-NMR methods. The <i>trans</i>-2 isomer was the most abundant, which was supported by mechanistic investigation using isotopically labeled experiments. A 2,5-hydrogenation mechanism following a monohydride reaction cycle could be suggested. Furthermore, a kinetic model is presented to provide a deeper understanding of the various reaction pathways.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 19","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ChemCatChemPub Date : 2025-08-05DOI: 10.1002/cctc.202500873
A. Moreno, L. Lobo, L. M. Martínez, L.F. Bobadilla, S. Ivanova, M. I. Domínguez, M. A. Centeno
{"title":"Boosting Hydrogen Release: Optimized C3N4-Supported Palladium Catalysts for Formic Acid Dehydrogenation","authors":"A. Moreno, L. Lobo, L. M. Martínez, L.F. Bobadilla, S. Ivanova, M. I. Domínguez, M. A. Centeno","doi":"10.1002/cctc.202500873","DOIUrl":"https://doi.org/10.1002/cctc.202500873","url":null,"abstract":"<p>Carbon nitride, C<sub>3</sub>N<sub>4</sub>, was synthesized through thermal polycondensation of melamine with varying temperature and time conditions. This approach represents a cost-effective, straightforward, and environmentally friendly synthetic method with lower energy consumption to obtain hierarchically structured carbon nitride. The resulting materials were subjected to comprehensive characterization to analyze their crystalline structure, textural properties, composition, and light absorption characteristics. To evaluate their catalytic potential, the supports were impregnated with different loadings of palladium (1, 5, and 10 wt%) as the active phase and tested in the decomposition of formic acid for hydrogen production in liquid phase at mild conditions. This study revealed that the structure and composition of the C<sub>3</sub>N<sub>4</sub> were highly dependent on the degree of polycondensation, which in turn was influenced by the temperature and the thermal synthesis process. The most promising catalytic performance was achieved with a support prepared by decomposing melamine at 650 °C for 4 h, followed by impregnation with 10 wt% Pd. Furthermore, a mechanistic study was conducted using <i>operando</i> DRIFTS-MS to explore the plausible catalytic pathways for synthesizing formic acid via CO<sub>2</sub> hydrogenation using the aforementioned catalyst. This investigation highlights the potential of C<sub>3</sub>N<sub>4</sub> as a support, further demonstrating its versatility in the circular economy of formic acid.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 19","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202500873","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ChemCatChemPub Date : 2025-08-05DOI: 10.1002/cctc.202500764
Danny Stark, Prof. Alfons Drochner, Jonas M. Grenz, Jan Welzenbach, Hannah Lamers, Dr. Kathrin Hofmann, Dr. Martin Panthöfer, Prof. Angela Möller, Prof. Christian Hess, Prof. Marcus Rose, Prof. Bastian J. M. Etzold, Prof. Tanja Franken
{"title":"Finding the Right Synergy of Iron and Molybdenum in Mixed Metal Oxide Catalysts for the Sustainable Production of Acetaldehyde via Oxidative Dehydrogenation of Ethanol","authors":"Danny Stark, Prof. Alfons Drochner, Jonas M. Grenz, Jan Welzenbach, Hannah Lamers, Dr. Kathrin Hofmann, Dr. Martin Panthöfer, Prof. Angela Möller, Prof. Christian Hess, Prof. Marcus Rose, Prof. Bastian J. M. Etzold, Prof. Tanja Franken","doi":"10.1002/cctc.202500764","DOIUrl":"https://doi.org/10.1002/cctc.202500764","url":null,"abstract":"<p>Iron–molybdenum mixed oxides are well-established catalysts for the oxidative dehydrogenation (ODH) of methanol, but their performance in the ODH of ethanol (EtOH), particularly with respect to the Mo:Fe ratio, remains unexplored. In this study, we present the synthesis of mixed oxides across the full composition range, their catalytic assessment in the ODH of EtOH, and their structural characterization. While pure iron oxide is unselective toward acetaldehyde (AcH), introducing small amounts of molybdenum oxide enhances the catalyst's selectivity significantly. In contrast, molybdate-rich systems tend to produce more dehydration products such as diethyl ether and ethene due to an increased acid site density. The optimal catalyst was found to be an iron-rich system with a composition of <i>x</i><sub>Fe</sub> = 0.95, yielding 94% AcH at temperatures as low as 220 °C with promising long-term stability. Therefore, while molybdenum is essential for high catalytic activity and selectivity, only small amounts are required when supported by a high surface area, defect-rich iron oxide, highlighting the efficiency of this mixed oxide system as catalyst for the ODH of EtOH.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 19","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202500764","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}