Catalysis Communications最新文献_第5页

Enhancing SO2 tolerance of Pt/CeO2 catalyst for CO oxidation via carbon-coated layers 通过碳涂层提高 Pt/CeO2 催化剂在 CO 氧化过程中对二氧化硫的耐受性

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106911

Yuwei Zhou , Xiao Yang , Xuan Tang , Yang Lou

引用次数: 0

Effect of alkali metal cation doping in graphitic carbon nitride towards photocatalytic generation of hydrogen peroxide under direct sunlight 氮化石墨碳中掺杂碱金属阳离子对阳光直射下光催化生成过氧化氢的影响

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106909

P. Haripriya , T. Anjana , K. Sreelakshmi , Nikhil T. Madhu , M. Anjana , P.V. Suneesh , Darbha V. Ravi Kumar

{"title":"Effect of alkali metal cation doping in graphitic carbon nitride towards photocatalytic generation of hydrogen peroxide under direct sunlight","authors":"P. Haripriya , T. Anjana , K. Sreelakshmi , Nikhil T. Madhu , M. Anjana , P.V. Suneesh , Darbha V. Ravi Kumar","doi":"10.1016/j.catcom.2024.106909","DOIUrl":"10.1016/j.catcom.2024.106909","url":null,"abstract":"<div>H2O2, a powerful oxidant with a vast number of industrial applications, is being synthesized by the energy intensive anthraquinone process. Recently, H2O2 has been synthesized using H2O and O2 by photocatalysis. Graphitic carbon nitride (g-C3N4) is a popular low-cost photocatalyst that is known to produce H2O2. However, the properties g-C3N4 needs to be tailored to improve the yield of H2O2. We discuss such a modification of g-C3N4 by alkali metal cation doping. Among the Li+, Na+ and K+ ions, doping of 10 wt% of K+ in g-C3N4 increase the yield of H2O2 (200 μmol g−1 h−1) by 2.5 times as compared un-doped g-C3N4 under natural sunlight.</div>","PeriodicalId":263,"journal":{"name":"Catalysis Communications","volume":"187 ","pages":"Article 106909"},"PeriodicalIF":3.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1566736724000694/pdfft?md5=eb45e617f6c13b5e8a34ae62393d9546&pid=1-s2.0-S1566736724000694-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140182186","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}

引用次数: 0

Preparation of 4,4-bis(5-methylthiophen-2-yl)pentanoic acid from biomass-based functional molecules using solid acid catalysts 利用固体酸催化剂从生物质功能分子制备 4,4-双(5-甲基噻吩-2-基)戊酸

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106906

Sreedhar Gundekari , Rajathsing Kalusulingam , Mohan Varkolu , Kannan Srinivasan

引用次数: 0

Enhanced low-temperature selective catalytic reduction (SCR) activity and H2O and SO2 resistance of flower-like SmMnOx and SmMnOx-rGO catalysts 增强花状 SmMnOx 和 SmMnOx-rGO 催化剂的低温选择性催化还原 (SCR) 活性以及耐 H2O 和 SO2 性能

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106908

Yungang He , Sitong Meng , Haofeng Zhu , Kaijiao Duan , Yumei Duan , Jing Zhang , Lijuan Jia , Mingwu Xiang , Vishesh Manjunath , Ezhumalai David , Sivasankar Koppala

{"title":"Enhanced low-temperature selective catalytic reduction (SCR) activity and H2O and SO2 resistance of flower-like SmMnOx and SmMnOx-rGO catalysts","authors":"Yungang He , Sitong Meng , Haofeng Zhu , Kaijiao Duan , Yumei Duan , Jing Zhang , Lijuan Jia , Mingwu Xiang , Vishesh Manjunath , Ezhumalai David , Sivasankar Koppala","doi":"10.1016/j.catcom.2024.106908","DOIUrl":"10.1016/j.catcom.2024.106908","url":null,"abstract":"<div>Reed flower-like SmMnOx and cauliflower-like SmMnOx-rGO catalysts were successfully synthesized by a coprecipitation-coupled solvothermal method for selective catalytic reduction (SCR) of NOx. The NOx conversion of the two catalysts is more than 90% in the temperature range of 75–200 °C, and the N2 selectivity of SmMnOx-rGO is above 90%. Moreover, both of them exhibit more than 62% of resistance to H2O and SO2 at a very low temperature of 100 °C, much superior than the fluffy spherical SmMnOx prepared by coprecipitation method. The strong synergy between Mn and Sm endowed by the flower-like structure contributes to a low degree of crystallization, a high ratio of (Mn3++Mn4+)/Mn, more chemisorbed oxygen species, strong redox ability, and more Lewis acid sites, hence effectively enhancing low-temperature SCR activity and resistance to H2O and SO2. In addition, the decreased ratio of Mn4+/Mn after rGO doping hinders the side reaction of NH3 oxidation, thus enhancing the N2 selectivity of rGO-doped SmMnOx catalyst.</div>","PeriodicalId":263,"journal":{"name":"Catalysis Communications","volume":"187 ","pages":"Article 106908"},"PeriodicalIF":3.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1566736724000682/pdfft?md5=0b10f182f4c6d03e941c5c0d3d2769d6&pid=1-s2.0-S1566736724000682-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140182298","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}

引用次数: 0

Highly efficient synthesis of high-density biofuels from biomass-derived α-pinene catalyzed by mesoporous H-ZSM-5 介孔 H-ZSM-5 催化生物质源 α-蒎烯高效合成高密度生物燃料

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106881

Chenan Yang, Yi Liu, Ying Hu, Peng Wang, Yuling Yang, Shangxing Chen, Zongde Wang, Xiang Li

引用次数: 0

Effects of alloying palladium with gold in furfural hydrogenation:An in situ ATR-IR spectroscopy and density functional theory study 糠醛氢化过程中金与钯合金化的影响：原位 ATR-IR 光谱和密度泛函理论研究

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106894

Sebastiano Campisi , Silvio Bellomi , Lidia E. Chinchilla , Marta Stucchi , Laura Prati , Alberto Roldan , Davide Ferri , Alberto Villa

引用次数: 0

High-pressure hydrothermal dope Ce into MoVTeNbOx for one-step oxidation of propylene to acrylic acid 高压水热掺杂 Ce 到 MoVTeNbOx 中，用于丙烯到丙烯酸的一步氧化反应

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106849

Yiwen Wang, Shuangming Li, Jiao Song, Haonan Qu, Sansan Yu

{"title":"High-pressure hydrothermal dope Ce into MoVTeNbOx for one-step oxidation of propylene to acrylic acid","authors":"Yiwen Wang, Shuangming Li, Jiao Song, Haonan Qu, Sansan Yu","doi":"10.1016/j.catcom.2024.106849","DOIUrl":"10.1016/j.catcom.2024.106849","url":null,"abstract":"<div>A high-pressure hydrothermal method was employed to introduce Ce element facilely into MoVTeNbOx catalysts in 0.5 h. It was indicated that Ce atoms were doped into the framework of MoVTeNbOx without changing the unique crystal structure of MoVTeNbOx. The introduction of Ce could facilitate the formation of oxygen vacancies and improve the redox ability of surfacial V. However, it was worth noting that the doping amount of Ce was negatively related to the content of M1 active phase. Within a certain range, the catalytic performance could be improved by sacrificing an appropriate amount of M1 phase. In the conversion of propylene to acrylic acid, the highest yield of 58.2% was obtained under catalyst MoVTeNbCeOx (V: Ce =1: 0.05) at 380 °C with the M1 phase content of 81.6%. The appropriate amount of Ce doping improved the propylene conversion by more than 20% compared to undoped. Moreover, the changes in Gibbs free energy of the rate-limiting step of direct oxidation of propylene before and after Ce doping were evaluated by Density functional theory (DFT). It is illustrated that the doping of Ce is thought to affect the main reason for the reduction of Gibbs free energy.</div>","PeriodicalId":263,"journal":{"name":"Catalysis Communications","volume":"187 ","pages":"Article 106849"},"PeriodicalIF":3.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1566736724000098/pdfft?md5=d121c760af196bde3a93fcff2c14e87a&pid=1-s2.0-S1566736724000098-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139508883","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}

引用次数: 0

Catalytic hydrogenolysis of lignin over Ni/CeO2-Al2O3 catalysts with formic acid as hydrogen source 以甲酸为氢源，在 Ni/CeO2-Al2O3 催化剂上催化木质素氢解

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106868

Jiaxin Liu , Pengcheng Xiu , Yafei Zhu , Kanghong Wang , Shanshan Tong , Yunpeng Ma , Haoquan Guo , Xiaoli Gu

引用次数: 0

Hydrothermally prepared unactivated bean sprouts biochar supported CdS with significantly enhanced photocatalytic hydrogen evolution activity 水热法制备的未活化豆芽生物炭支持的 CdS 具有显著增强的光催化氢进化活性

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106861

Lili Zhang , Chunyan Zhang , Jianjun Li , Keyuan Sun , Jindi Zhang , Mengyang Huang , Jiaqiang Wang

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Adopting chitosan supported Ag and Ag2O nano-clusters for catalytic hydrogenation of CO2 to formic acid: A quantum semi-empirical calculation 采用壳聚糖支撑的 Ag 和 Ag2O 纳米簇催化 CO2 加氢制甲酸：量子半经验计算

IF 3.7 3区化学

Catalysis Communications Pub Date : 2024-02-01 DOI: 10.1016/j.catcom.2024.106872

Ali H. Bashal

引用次数: 0