{"title":"Metal Oxide Bronzes as Catalysts and Catalyst Precursors for Redox and/or Acid Catalysis","authors":"José M. López Nieto","doi":"10.1007/s11244-025-02143-7","DOIUrl":"10.1007/s11244-025-02143-7","url":null,"abstract":"<div><p>In recent decades, the synthesis, characterization, and potential applications of metal oxide bronzes have been studied, with their potential applications as catalysts and electrocatalysts. Among these, materials based on mixed oxide bronzes, with specific crystalline structures, of molybdenum and/or tungsten have garnered some attention for their application in catalytic processes for the valorization of natural gas fractions (especially ethane and propane) and/or biomass derivatives (especially glycerol, but also other components). This paper presents a review of the types of synthesized materials and the catalytic processes in which molybdenum and/or tungsten oxides bronzes have been studied. In addition, it will be also presented P-containing catalysts as well as other pseudo-crystalline materials, which can be also of interest in these types of reaction.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 16-17","pages":"1966 - 1984"},"PeriodicalIF":3.0,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11244-025-02143-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230413","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}
{"title":"Catalysis Towards Safer and Efficient Processes","authors":"Sounak Roy, Benjaram M. Reddy, Pascal Granger","doi":"10.1007/s11244-025-02192-y","DOIUrl":"10.1007/s11244-025-02192-y","url":null,"abstract":"","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 18-19","pages":"2027 - 2029"},"PeriodicalIF":3.0,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230228","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}
Maren-Kathrin Heubach, Fabian M. Schuett, Jerome Mayer, Omar W. Elkhafif, Albert K. Engstfeld, Timo Jacob
{"title":"Reproducibility of Electrochemical Measurements with Ionic Liquids: Role of Supplied Batches, Water and Adventitious Oxygen","authors":"Maren-Kathrin Heubach, Fabian M. Schuett, Jerome Mayer, Omar W. Elkhafif, Albert K. Engstfeld, Timo Jacob","doi":"10.1007/s11244-025-02123-x","DOIUrl":"10.1007/s11244-025-02123-x","url":null,"abstract":"<div><p>Studying the potential dependent interaction of non-aqueous electrolytes, such as ionic liquids (ILs), with model electrode surfaces plays a crucial role not only in the field of battery-related research. These electrolytes bear the advantage that their electrochemical stability windows often exceed that of water. However, comparing results using ILs as electrolytes reported in the literature reveals strong discrepancies in the reproducibility of the data. In this study, we show that parameters such as the supplier, the supplied batch, and the purification steps can have a huge impact on the electrochemical properties. As a reference system, these properties are studied by cyclic voltammetry on a Au(111) single crystal electrode in <i>N</i>-methyl-<i>N</i>-propylpiperidinium bis(trifluoromethane)sulfonimide ([MPPip][TFSI]). Analysing the different features observed in the cyclic voltammograms, we were to some extent able to deconvolute the features that are related to the interaction of ILs with the substrate and impurities added from the pretreatment due to the influence of residual water and oxygen.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 16-17","pages":"1910 - 1923"},"PeriodicalIF":3.0,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11244-025-02123-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230437","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}
Tong Li, Leila Dehimi, Andrei Khodakov, Pascal Granger, Mirella Virginie
{"title":"Dry Methane Reforming over Alumina Supported Molybdenum Carbide Catalysts Promoted with Nickel","authors":"Tong Li, Leila Dehimi, Andrei Khodakov, Pascal Granger, Mirella Virginie","doi":"10.1007/s11244-025-02146-4","DOIUrl":"10.1007/s11244-025-02146-4","url":null,"abstract":"<div><p>Nickel-promoted molybdenum carbide (Mo<sub>2</sub>C) catalysts supported on γ-Al<sub>2</sub>O<sub>3</sub> were synthesized via incipient wetness impregnation and evaluated for dry methane reforming (DMR). Comprehensive physicochemical characterizations including XRD, SEM-EDS, H<sub>2</sub>-TPR, XPS, TPSR, and TG-DSC were conducted to elucidate structure-performance relationships. Non-promoted Mo<sub>2</sub>C exhibited poor catalytic stability due to oxidation during DMR. The incorporation of nickel significantly enhanced catalytic activity and stability by promoting the in-situ re-carburization of oxidized Mo species and facilitating methane activation. The optimized Ni/Mo molar ratio of 1:1 led to the formation of a stable Ni-Mo synergistic phase, which exhibited superior resistance to sintering and deactivation.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 18-19","pages":"2124 - 2143"},"PeriodicalIF":3.0,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230467","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}
Balendra V. S. Chauhan, Maureen J. Berg, Kirsty L. Smallbone, Indra Rautela, Suhas Ballal, Kevin P. Wyche
{"title":"Machine Learning Driven Prediction and Analysis of NO2 and its Catalyst Based Reduction in Urban Environments","authors":"Balendra V. S. Chauhan, Maureen J. Berg, Kirsty L. Smallbone, Indra Rautela, Suhas Ballal, Kevin P. Wyche","doi":"10.1007/s11244-025-02161-5","DOIUrl":"10.1007/s11244-025-02161-5","url":null,"abstract":"<div><p>This study employed machine learning (ML) to predict nitrogen dioxide (NO₂) pollution in Marylebone Road, London a high-traffic urban corridor using historical data from 2015 to 2022 to forecast concentrations for the period January 2023 to January 2025. Four ML models were developed and evaluated: Linear Regression, Random Forest, LightGBM, and an Ensemble Stacking model. These models incorporated meteorological and pollutant data and were assessed using Mean Absolute Error (MAE), Root Mean Square Error (RMSE), and R-squared (R²). The Ensemble Stacking model outperformed the others, achieving an R² of 0.9723, MAE of 3.91 µg/m³, and RMSE of 6.25 µg/m³. In comparison, the Linear Regression model showed the lowest performance (R² = 0.8307, MAE = 11.55, RMSE = 15.45), while Random Forest (R² = 0.9232) and LightGBM (R² = 0.9719) demonstrated intermediate accuracy. The best-performing ensemble model was further used to simulate NO₂ trends with and without titanium dioxide (TiO₂) catalyst intervention, assuming a 28% NO₂ reduction. Temporal analysis revealed that NO, NO₂, and NOₓ concentrations peaked during colder months (November–January) and weekdays. Correlation analysis showed a weak negative relationship between NO₂ and ozone (O₃) (R² = 0.26), moderate positive correlations with black carbon (BC) (R² = 0.597) and sulfur dioxide (SO₂) (R² = 0.654), and a very weak positive correlation with particulate matter (PM2.5) (R² = 0.143). The study concludes that ensemble stacked ML models are effective for predicting NO₂ concentrations and that TiO₂ nanocatalyst interventions hold promise for reducing NO₂, BC, and SO₂ levels in urban environments.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 18-19","pages":"2089 - 2108"},"PeriodicalIF":3.0,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11244-025-02161-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230359","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}
Günther Rupprechter, Zdenek Dohnálek, Anthony F. Volpe Jr.
{"title":"Preface to “Complexity at Catalytically Relevant Interfaces, Irsee X Symposium Sponsored by the Robert Karl Grasselli Foundation, Kloster Irsee, Germany, 6–9 June 2024”","authors":"Günther Rupprechter, Zdenek Dohnálek, Anthony F. Volpe Jr.","doi":"10.1007/s11244-025-02181-1","DOIUrl":"10.1007/s11244-025-02181-1","url":null,"abstract":"","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 16-17","pages":"1825 - 1827"},"PeriodicalIF":3.0,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230325","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":"Effect of SiO2 Morphology on CH4 Pyrolysis Activity of Ni Catalyst in the Emission Free H2 Production","authors":"Kalpana Manda, Sasikumar Boggala, Anjaneyulu Chatla, Venugopal Akula","doi":"10.1007/s11244-025-02151-7","DOIUrl":"10.1007/s11244-025-02151-7","url":null,"abstract":"<div><p>Ni supported on SiO<sub>2</sub> with various morphologies such as nanocubes, nanorods, nanospheres and dendritic mesoporous silica (DMS) are prepared and employed for zero emission hydrogen production (Turquoise hydrogen). The fresh calcined catalysts possessed NiO (200) planes predominantly while in the reduced samples Ni<sup>0</sup> (111) planes are majorly exposed irrespective of SiO<sub>2</sub> morphology. Among these the Ni-DMS demonstrated a higher rate of H<sub>2</sub> production while, the Ni/nanorods showed inferior activity. Formation of Ni silicate was found only in case of Ni/nanorods. Ionic Ni reduced below 600 °C seems to exhibit better CH<sub>4</sub> cracking rate, as was depicted from H<sub>2</sub>-TPR results. Variation in graphitic carbon was found due to difference in SiO<sub>2</sub> morphology as well as the reducibility of nickel interacted with SiO<sub>2</sub>.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 18-19","pages":"2189 - 2199"},"PeriodicalIF":3.0,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230397","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":"Electrocatalytic Oxygen Evolution Over Co3 − xMnxO4: Correlating Structure with Reactivity","authors":"Saraswati Roy, Sounak Roy","doi":"10.1007/s11244-025-02163-3","DOIUrl":"10.1007/s11244-025-02163-3","url":null,"abstract":"<p>Water electrolysis, driven by renewable energy, offers a sustainable route for alternate energy. The oxygen evolution reaction, the key anodic reaction of water electrolysis is a complex reaction due to its four-electron process involving multiple oxygen intermediates. Mixed-valence spinel oxides, such as Co<sub>3</sub>O<sub>4</sub> and Mn<sub>3</sub>O<sub>4</sub> have attracted significant attention as anodic catalyst owing to the low cost, earth abundance, low toxicity, and multiple oxidation states. Despite extensive studies on activity descriptors and the mechanistic aspects of the oxygen evolution reaction over these spinel oxides, a comprehensive understanding of the structure–reactivity correlation remains underexplored. While Co<sub>3</sub>O<sub>4</sub> adopts a cubic structure, Mn<sub>3</sub>O<sub>4</sub> crystallizes in a tetragonal form due to Jahn–Teller distortion, making intermediate Co<sub>3 − x</sub>Mn<sub>x</sub>O<sub>4</sub> solid solutions ideal for studying structure–reactivity correlations. Phase-pure Co<sub>2</sub>MnO<sub>4</sub> (cubic) and CoMn<sub>2</sub>O<sub>4</sub> (tetragonal) were synthesized via combustion synthesis. Despite similar porosity and surface area, CoMn<sub>2</sub>O<sub>4</sub> showed higher electrochemical surface area, better charge transfer, and more oxygen vacancies. Mn-rich CoMn<sub>2</sub>O<sub>4</sub> exhibited superior OER activity, requiring just 260 mV overpotential at 10 mA cm<sup>− 2</sup>, alongside a low Tafel slope of 55 mV dec<sup>− 1</sup> and activation energy of 10 kJ mol<sup>− 1</sup>. Surface analysis confirmed the formation of <span>(:{text{C}text{o}}_{text{o}text{h}}^{3+})</span><sub>–</sub>OOH intermediates, highlighting the role of optimal doping and structural tuning in enhancing oxygen evolution reaction performance and stability.</p>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 18-19","pages":"2281 - 2295"},"PeriodicalIF":3.0,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230341","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":"Hybrid Lithium Electrolytes as Potential Electrolytes for Energy Storage Devices: A Pathway to Sustainable and High-Efficiency Solutions","authors":"Chitra Sharma, Harpreet Kaur, Abhinay Thakur, Ramesh Chand Thakur, Harmanjit Singh Dosanjh","doi":"10.1007/s11244-025-02154-4","DOIUrl":"10.1007/s11244-025-02154-4","url":null,"abstract":"<div><p>The urgent demand for high-performance and sustainable energy storage solutions necessitates the development of advanced electrolytes with superior electrochemical properties. Hybrid lithium electrolytes, which integrate the advantages of inorganic and organic ionic conductors, have emerged as promising candidates for next-generation energy storage devices. This review presents a comprehensive bibliometric analysis of 1569 research articles from 2019 to 2024, sourced from Scopus and Web of Science (WOS) databases, highlighting the rising research focus on hybrid electrolytes. Key material properties such as wide electrochemical windows, thermal and chemical stability, low toxicity, and reduced volatility are critical for enhancing battery performance. The discussion encompasses recent advancements in solid-state, polymer, and hybrid electrolytes, emphasizing their role in improving energy density, cycling stability, and safety. Furthermore, this study examines the challenges associated with hybrid electrolytes, including ionic conductivity limitations, interfacial compatibility, and scalability for industrial applications. The integration of novel materials such as NASICON-type ceramics, perovskites, sulfides, and garnet-based electrolytes is explored for their potential to revolutionize lithium-ion battery technologies. By bridging the gap between fundamental research and practical implementation, this review provides insights into the future directions of hybrid electrolytes, paving the way for more efficient and sustainable energy storage systems.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 18-19","pages":"2356 - 2372"},"PeriodicalIF":3.0,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230344","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}
Marcus A. Sharp, Christopher J. Lee, Mausumi Mahapatra, Bruce D. Kay, Zdenek Dohnálek
{"title":"Active Site Evolution during Formic Acid Conversion on Rh-Substituted Fe3O4(001)","authors":"Marcus A. Sharp, Christopher J. Lee, Mausumi Mahapatra, Bruce D. Kay, Zdenek Dohnálek","doi":"10.1007/s11244-025-02101-3","DOIUrl":"10.1007/s11244-025-02101-3","url":null,"abstract":"<div><p>Single-atom catalysts (SACs) offer a promise of providing unique properties, superior selectivity, and maximum atomic efficiency compared to traditional nanoparticle catalysts. However, their stability under reaction conditions remains a critical challenge. This study examines the reactivity and structural evolution of a thermally stable (~ 700 K) model Rh/Fe<sub>3</sub>O<sub>4</sub>(001) SAC, where Rh is substituted into the surface layer. Previously, we demonstrated that water formation via the Mars-van Krevelen mechanism during formic acid conversion destabilizes in-surface octahedral Rh, yielding active Rh adatoms and clusters that dynamically re-incorporate into the Fe<sub>3</sub>O<sub>4</sub> lattice at 700 K. Here, we follow the evolution of the catalyst structure and changes in the CO and CO<sub>2</sub> formation kinetics during multiple formic acid conversion cycles. Temperature-programmed reaction spectroscopy (TPRS) cycles to 700 K reveal that small Rh clusters formed during the first several cycles can re-incorporate into the Fe<sub>3</sub>O<sub>4</sub>(001) lattice. Over subsequent cycles, larger nanoparticles eventually form and persist. These effects are further accelerated when annealing is limited to only 550 K. Changes in the CO<sub>2</sub> formation/desorption temperature in TPRS reveal that the activity for formic acid dehydrogenation increases progressively from single atoms to clusters and nanoparticles. This study provides fundamental insights into the dynamic behavior and performance of SACs during catalytic reactions.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"68 16-17","pages":"1848 - 1856"},"PeriodicalIF":3.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145230532","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}