Materials Today Catalysis最新文献_第5页

(Ru-)Mo2C (MXene) catalysts for ammonia synthesis: From Haber-Bosch to chemical looping processes 用于合成氨的 (Ru-)Mo2C (MXene) 催化剂：从哈伯-博什到化学循环过程

Materials Today Catalysis Pub Date : 2024-09-23 DOI: 10.1016/j.mtcata.2024.100066

Charlotte Croisé, Xavier Courtois, Stéphane Célérier, Lola Loupias, Christine Canaff, Julie Rousseau, Nicolas Bion, Fabien Can

{"title":"(Ru-)Mo2C (MXene) catalysts for ammonia synthesis: From Haber-Bosch to chemical looping processes","authors":"Charlotte Croisé, Xavier Courtois, Stéphane Célérier, Lola Loupias, Christine Canaff, Julie Rousseau, Nicolas Bion, Fabien Can","doi":"10.1016/j.mtcata.2024.100066","DOIUrl":"10.1016/j.mtcata.2024.100066","url":null,"abstract":"<div><div>This study investigated (Ru-)Mo2C (MXene) materials for ammonia thermo-catalytic synthesis under atmospheric or moderate pressure. Under a H2-N2 (3:1) flow, the Mo2C MXene phase showed limited activity in ammonia synthesis at atmospheric pressure at 400 °C (0.01 mmol h⁻¹ g⁻¹), which increased significantly with temperature and pressure, reaching 2.07 mmol h⁻¹ g⁻¹ at 500°C and under 5 bar. Interestingly, Mo-based MXene was able to generate an appreciable quantity of ammonia without promoters such as ruthenium, the most active metal for the ammonia synthesis reaction. Unexpectedly, the addition of Ru to Mo2C did not enhance its activity. The nitriding of the MXene under NH3 or N2 was then performed and characterized. A thermal treatment under NH3 (600 °C, 5 bar) was efficient and, interestingly, nitriding also occurred in a lower extent under N2 (600 °C, 5 bar) for the sample containing ruthenium. The N-containing MXene produced ammonia under pure H2 flow from temperatures lower than 250 °C. Consecutive nitriding treatments and ammonia production under pure H2 were successfully achieved and demonstrated for 5 cycles. This result is promising for chemical looping ammonia production process. This work highlights essential aspects that should be explored for future advances to consider using Mo2CTx MXene for the efficient thermal production of ammonia.</div></div>","PeriodicalId":100892,"journal":{"name":"Materials Today Catalysis","volume":"7 ","pages":"Article 100066"},"PeriodicalIF":0.0,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142320116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Advancements in Amorphous Oxides For Electrocatalytic Carbon Dioxide Reduction 用于电催化二氧化碳还原的无定形氧化物的研究进展

Materials Today Catalysis Pub Date : 2024-09-21 DOI: 10.1016/j.mtcata.2024.100065

Youcai Meng , Junyang Ding , Yifan Liu , Guangzhi Hu , Yanhong Feng , Yinghong Wu , Xijun Liu

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Synergistic boosting the electrooxidation of biomass-based 5-hydroxymethylfurfural on cellulose-derived Co3O4/N-doped carbon catalysts 纤维素衍生 Co3O4/N 掺杂碳催化剂对生物质基 5-羟甲基糠醛电氧化的协同促进作用

Materials Today Catalysis Pub Date : 2024-09-19 DOI: 10.1016/j.mtcata.2024.100062

Haixin Sun , Yingying Gao , Mengyuan Chen , Ming Li , Qinqin Xia , Yongzhuang Liu , Juan Meng , Shuo Dou , Haipeng Yu

{"title":"Synergistic boosting the electrooxidation of biomass-based 5-hydroxymethylfurfural on cellulose-derived Co3O4/N-doped carbon catalysts","authors":"Haixin Sun , Yingying Gao , Mengyuan Chen , Ming Li , Qinqin Xia , Yongzhuang Liu , Juan Meng , Shuo Dou , Haipeng Yu","doi":"10.1016/j.mtcata.2024.100062","DOIUrl":"10.1016/j.mtcata.2024.100062","url":null,"abstract":"<div><div>Catalysts play a pivotal role in the efficient conversion of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) through electrochemical oxidation. In this work, a cost-effective and highly efficient cobalt-based electrocatalyst for the synthesis of bio-based carboxylic acids was reported. By the employment of cellulose, which was dissolved in the alkaline-urea with cobalt ion, as the precursor, it derived a carbon-coated Co3O4 (Co3O4@NC) catalyst with a high specific surface area and rich porous structure. When utilized in the electrocatalytic conversion of HMF to FDCA, the catalyst exhibited exceptional yields and Faradaic efficiency which surpassed 95 %. In-situ Raman spectra unveiled that a dual-pathway process occurred on this catalyst, with part of Co3O4 serving as active sites for HMF adsorption, while other Co3O4 transformed into CoOOH during the reaction. This dual-pathway electrocatalysis facilitated the highly efficient conversion of HMF. Additionally, using bio-based alcohols/aldehydes as the feedstocks, eight carboxylic acids were successfully synthesized with yields ranging from 91.5 % to 99 %. This study presents a highly efficient electrocatalyst derived from biomass, enabling diverse bio-based carboxylic acid production with significant potential for sustainable chemical synthesis.</div></div>","PeriodicalId":100892,"journal":{"name":"Materials Today Catalysis","volume":"7 ","pages":"Article 100062"},"PeriodicalIF":0.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142320114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Innovations in catalytic understanding: A journey through advanced characterization 催化理解方面的创新：高级表征之旅

Materials Today Catalysis Pub Date : 2024-09-13 DOI: 10.1016/j.mtcata.2024.100061

Ifeanyi Michael Smarte Anekwe , Stephen Okiemute Akpasi , Emeka Michael Enemuo , Darlington Ashiegbu , Sherif Ishola Mustapha , Yusuf Makarfi Isa

{"title":"Innovations in catalytic understanding: A journey through advanced characterization","authors":"Ifeanyi Michael Smarte Anekwe , Stephen Okiemute Akpasi , Emeka Michael Enemuo , Darlington Ashiegbu , Sherif Ishola Mustapha , Yusuf Makarfi Isa","doi":"10.1016/j.mtcata.2024.100061","DOIUrl":"10.1016/j.mtcata.2024.100061","url":null,"abstract":"<div><div>This work provides a comprehensive overview of advanced characterisation techniques to unravel the molecular intricacies of catalytic processes. It begins with an introduction to catalytic processes and emphasises the importance of innovations in characterisation techniques, including SEM, XRD, UV-Vis, FTIR, RAMAN, XPS, NMR, TEM, AFM and the combined application of these techniques for improved catalytic investigation. The review of the development of catalytic processes provides a historical overview of progress and examines paradigm shifts in catalytic mechanisms and catalyst categories. Conventional microscopic and spectroscopic tools are revisited, highlighting the improvements in these techniques that provide insight into catalytic structures through surface analysis. Significant advances, including the application of computational techniques, in the study of catalysts are also discussed, focusing on state-of-the-art techniques that provide unprecedented detail on catalyst properties, mechanisms and processes. Comparative evaluations highlight the advantages and limitations of these techniques. The study concludes by identifying and overcoming challenges, anticipating prospects and emphasising the constant quest for innovation in understanding catalysts. By integrating developments in microscopic and spectroscopic methods, the study provides a comprehensive insight into how these tools improve the precision and depth of catalyst characterisation, driving innovation and future directions in catalysis research.</div></div>","PeriodicalId":100892,"journal":{"name":"Materials Today Catalysis","volume":"7 ","pages":"Article 100061"},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949754X24000231/pdfft?md5=eda9c71863431be2bd77dc1b0173f6ef&pid=1-s2.0-S2949754X24000231-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Cover 封面

Materials Today Catalysis Pub Date : 2024-09-01 DOI: 10.1016/S2949-754X(24)00025-5

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Wafer scale and substrate-agnostic growth of MoS2 nanowalls for efficient electrocatalytic hydrogen generation in acidic and alkaline media 晶圆级和基底无关的 MoS2 纳米壁生长，用于在酸性和碱性介质中高效电催化制氢

Materials Today Catalysis Pub Date : 2024-09-01 DOI: 10.1016/j.mtcata.2024.100060

Ziyang Gan , Rayantan Sadhukhan , Christof Neumann , Nandita Mohandas , Emad Najafidehaghani , Manuel Mundszinger , Johannes Biskupek , Ute Kaiser , Tharangattu N. Narayanan , Antony George , Andrey Turchanin

{"title":"Wafer scale and substrate-agnostic growth of MoS2 nanowalls for efficient electrocatalytic hydrogen generation in acidic and alkaline media","authors":"Ziyang Gan , Rayantan Sadhukhan , Christof Neumann , Nandita Mohandas , Emad Najafidehaghani , Manuel Mundszinger , Johannes Biskupek , Ute Kaiser , Tharangattu N. Narayanan , Antony George , Andrey Turchanin","doi":"10.1016/j.mtcata.2024.100060","DOIUrl":"10.1016/j.mtcata.2024.100060","url":null,"abstract":"<div>Emerging as a promising alternative to expensive platinum-based catalysts for electrocatalytic hydrogen evolution reaction (HER), molybdenum disulfide (MoS2) stands out for its favourable thermodynamic properties. However, the catalytic activity of MoS2 is mostly confined to its edges while the basal plane remains inactive, limiting practical applicability. Fabrication of stable MoS2 structures with enhanced active sites on a given surface area still remains a complex task. Here we introduce a substrate-agnostic, metal-organic chemical vapour deposition (MOCVD) method for large-area 3D dendritic nanostructures of 2D MoS2, termed as “MoS2 nanowalls”. Using scanning and transmission electron microscopy (SEM/TEM), we elucidate the growth mechanism of the MoS2 nanowalls and their branched dendritic structure. Even subjected to extreme pH environments (0 and 14) during the HER, the grown MoS2 nanowalls show remarkable stability even after >170 hours of continuous operation and exhibit excellent catalytic activity with 10 mAcm−2 current density achievable by applying low overpotentials (309±2 mV at pH = 0 and 272±2 mV at pH = 14). The presented large-area growth method for inexpensive MoS2 nanowall based catalyst can pave the way for practical applications of water electrolysis cells operating at low voltages (≤1.5 V).</div>","PeriodicalId":100892,"journal":{"name":"Materials Today Catalysis","volume":"6 ","pages":"Article 100060"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949754X2400022X/pdfft?md5=3786ea9c0af59ae7ea78710e2288582f&pid=1-s2.0-S2949754X2400022X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142239346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Ediorial Board 编辑委员会

Materials Today Catalysis Pub Date : 2024-09-01 DOI: 10.1016/S2949-754X(24)00026-7

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“Heating where it hurts”: Electromagnetic induction remote energy transfer to a solid catalyst enables waste polymer upcycling "加热痛处"：电磁感应远程能量转移到固体催化剂，实现废弃聚合物的再循环利用

Materials Today Catalysis Pub Date : 2024-07-25 DOI: 10.1016/j.mtcata.2024.100059

Marcos G. Farpón, Enrique Torregrosa, Gonzalo Prieto

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Investigation of m- and p-xylene linked bimetallic Ni-cyclam-complexes as potential electrocatalysts for the CO2 reduction 研究作为潜在二氧化碳还原电催化剂的间二甲苯和对二甲苯连接双金属镍-环-络合物

Materials Today Catalysis Pub Date : 2024-06-23 DOI: 10.1016/j.mtcata.2024.100058

Sarah Bimmermann , Daniel Siegmund , Kallol Ray , Ulf-Peter Apfel

{"title":"Investigation of m- and p-xylene linked bimetallic Ni-cyclam-complexes as potential electrocatalysts for the CO2 reduction","authors":"Sarah Bimmermann , Daniel Siegmund , Kallol Ray , Ulf-Peter Apfel","doi":"10.1016/j.mtcata.2024.100058","DOIUrl":"https://doi.org/10.1016/j.mtcata.2024.100058","url":null,"abstract":"<div>Among the various molecular CO2 reduction catalysts, the [Ni(cyclam)]2+ (Ni-{N4}) complex with its earth-abundant metal center and macrocyclic ligand proved to be efficient for the selective electrochemical conversion of CO2 to CO. In the present study we now connected the two Ni-cyclam units by using para- and meta-xylene as organic linkers attached to the amines of the macrocycle to form the p-{Ni2} and m-{Ni2} complexes, respectively, and test them as catalysts for the electrochemical CO2 reduction reactions. Notably, the p-{Ni2} complex demonstrates a higher faraday efficiency in the electrochemical reduction of CO2 to CO compared to the m-{Ni2} complex. This finding highlights the significant role played by the M-M distance in influencing this catalytic process.</div>","PeriodicalId":100892,"journal":{"name":"Materials Today Catalysis","volume":"6 ","pages":"Article 100058"},"PeriodicalIF":0.0,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949754X24000206/pdfft?md5=b643e202f5402da26a8e5f551eaf7f0d&pid=1-s2.0-S2949754X24000206-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141479384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Ediorial Board 编辑委员会

Materials Today Catalysis Pub Date : 2024-06-01 DOI: 10.1016/S2949-754X(24)00019-X

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