Applied Catalysis A: General最新文献_第10页

Positive potential pretreatment of TiO2 photoanode towards efficient charge separation 正电位预处理二氧化钛光阳极，实现高效电荷分离

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-08-05 DOI: 10.1016/j.apcata.2024.119904

Li Zou , Jiale Xie , Shuxiang Wang , Yixing Yu , Jing Huang , Liuliu Wang , Pingping Yang , Wenyan Tao

{"title":"Positive potential pretreatment of TiO2 photoanode towards efficient charge separation","authors":"Li Zou , Jiale Xie , Shuxiang Wang , Yixing Yu , Jing Huang , Liuliu Wang , Pingping Yang , Wenyan Tao","doi":"10.1016/j.apcata.2024.119904","DOIUrl":"10.1016/j.apcata.2024.119904","url":null,"abstract":"<div>Low charge separation efficiency (ηsep) of TiO2 impedes its applications of photoelectrochemical (PEC) water splitting. A positive potential pretreatment approach has been developed to construct a surface polarization with −OH groups at a potential of 1.48 VRHE. When the pretreatment time of 6 h is used, the ηsep and photocurrent density (Jph) reach up to 54 % (vs. 24 %, TiO2) and 0.92 mA cm−2 (vs. 0.32 mA cm−2, TiO2) under AM 1.5 G illumination, respectively. The photovoltage can be increased from 0.17 V to 0.52 V. When the pretreatment time is extended to 22 h, a higher Jph of 1.57 mA cm−2 and ηsep of 87 % can be obtained. Furthermore, the positive potential pretreated TiO2 possesses excellent PEC stability. The PEC improvements can be attributed to the surface polarization with the −OH groups and favorable surface states of Ti-OH, but not to the formation of Ti3+ or oxygen vacancies.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"685 ","pages":"Article 119904"},"PeriodicalIF":4.7,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141978807","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}

引用次数: 0

Hydrogenation of inert aromatic compounds under mild conditions catalyzed by confined trimetal sites in porous metal silicate materials 多孔金属硅酸盐材料中的封闭三金属位催化惰性芳香化合物在温和条件下的氢化反应

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-08-05 DOI: 10.1016/j.apcata.2024.119901

Zikun Liu, Chuan-De Wu

{"title":"Hydrogenation of inert aromatic compounds under mild conditions catalyzed by confined trimetal sites in porous metal silicate materials","authors":"Zikun Liu, Chuan-De Wu","doi":"10.1016/j.apcata.2024.119901","DOIUrl":"10.1016/j.apcata.2024.119901","url":null,"abstract":"<div>Complete hydrogenation of aromatic compounds is an important subject in various industry fields. However, due to the high stabilization energy of aromatic compounds resulting from their high aromaticity and non-polarity, the hydrogenation reaction is usually performed under harsh reaction conditions in the presence of noble metal-based catalysts. We report herein a porous metal silicate (PMS) material PMS-58, which consists of Cu, Ce and Co trimetal active sites, demonstrating high catalytic activity and selectivity in hydrogenating of a series of aromatic compounds under mild conditions (60 °C and 0.5 MPa H2). PMS-58 is superior to the previously reported non-noble metal-based catalysts and could be favorably compared to noble metal-based catalysts. The unique catalytic properties of PMS-58 are derived from the synergistic work of trimetal sites with Ce species serving as strong Lewis acid sites for dissociation of dihydrogen, Co species stabilizing Cu(I) species, and Cu(I) species playing a crucial role in activating aromatic rings. Therefore, this work provides a new approach in developing highly efficient non-noble metal catalysts for complete hydrogenation of arenes under mild conditions, which could be applied in removal of aromatic compounds in petroleum products.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"685 ","pages":"Article 119901"},"PeriodicalIF":4.7,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141978808","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}

引用次数: 0

Regioselective hydrophosphorylation of alkynes by a functionalized heterogeneous Cu-chitosan based catalyst 基于铜-壳聚糖的功能化异相催化剂对炔烃的区域选择性氢化磷酸化作用

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-08-03 DOI: 10.1016/j.apcata.2024.119900

Yining Ren, Liyong Chen, Mingyu Xie, Shipan Xu, Yu Liu, Longzhi Zhu, Weifeng Xu, Biquan Xiong

{"title":"Regioselective hydrophosphorylation of alkynes by a functionalized heterogeneous Cu-chitosan based catalyst","authors":"Yining Ren, Liyong Chen, Mingyu Xie, Shipan Xu, Yu Liu, Longzhi Zhu, Weifeng Xu, Biquan Xiong","doi":"10.1016/j.apcata.2024.119900","DOIUrl":"10.1016/j.apcata.2024.119900","url":null,"abstract":"<div>The functionalized heterogeneous Cu-chitosan based catalyst was developed for the regioselective hydrophosphorylation of alkynes with secondary H-phosphine oxides. The functionalized chitosan framework was produced through a cross-coupling reaction between chitosan and 2,4,6-trichloro-1,3,5-triazine. Following this, the coordination of Cu(OAc)2 with the functionalized chitosan framework led to the synthesis of the heterogeneous Cu-chitosan based catalyst. Various techniques, such as powder FT-IR spectroscopy, X-ray diffraction (XRD), N2 physical adsorption, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM), were employed to characterize the catalyst. Subsequently, the resulting Cu(OAc)2@chitosan@2,4,6-trichloro-1,3,5-triazine catalyst exhibited remarkable catalytic activity in the regioselective hydrophosphorylation of alkynes with the formation of P–C bonds, displaying exceptional E/Z selectivity. This successful catalysis led to the synthesis of a range of (E) anti-Markovnikov adducts with high yields. The catalyst shows high recyclability in this transformation. On the basis of step-by-step control experiments, a plausible mechanism is proposed.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"684 ","pages":"Article 119900"},"PeriodicalIF":4.7,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142020491","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}

引用次数: 0

CO2 capture and methanation over iron and cobalt-containing catalysts operated in a domestic microwave oven 在家用微波炉中使用含铁和钴催化剂进行二氧化碳捕获和甲烷化

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-31 DOI: 10.1016/j.apcata.2024.119898

Loren Acher, Jessim Gana, Thierry Caillot, Akim Kaddouri, Frederic C. Meunier

{"title":"CO2 capture and methanation over iron and cobalt-containing catalysts operated in a domestic microwave oven","authors":"Loren Acher, Jessim Gana, Thierry Caillot, Akim Kaddouri, Frederic C. Meunier","doi":"10.1016/j.apcata.2024.119898","DOIUrl":"10.1016/j.apcata.2024.119898","url":null,"abstract":"<div>SiC and Fe3O4 were used as microwave (MW) susceptors in a novel type of domestic MW oven featuring the so-called “Inverter” technology used for CO2 trapping and methanation. A catalyst based on cobalt was added and the conversion of CO2 was studied both in continuous mode (co-feeding H2 and CO2) and pulsed mode (sequential CO2 trapping and desorption/hydrogenation). CO2 conversion up to 80 % could be achieved over the physical mixture of SiC, Fe3O4 and Co/Al2O3, although high selectivities to CO were observed. The periodic glow of the susceptors and the corresponding oscillation of the catalytic activity at powers lower than 440 W revealed that MW power delivery was actually pulsed, unlike the manufacturer claim. Higher output power enabled both higher CO2 conversion rate and selectivity to CH4. The catalytic performances were improved by operating in CO2 trapping/methanation mode as compared to a continuous flow mode.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"685 ","pages":"Article 119898"},"PeriodicalIF":4.7,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946943","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}

引用次数: 0

In situ growth of Cs3Bi2Br9/BiOBr S-scheme heterojunction in alcohol aqueous solution for boosting photocatalytic activity 在酒精水溶液中原位生长 Cs3Bi2Br9/BiOBr S 型异质结以提高光催化活性

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-31 DOI: 10.1016/j.apcata.2024.119899

Xue-Li Yang , Min Qiu , Zi-Xuan Zhao , Ling Chen , Jun Du , Xing Fan , Bing-Xin Lei , Zhao-Qing Liu

{"title":"In situ growth of Cs3Bi2Br9/BiOBr S-scheme heterojunction in alcohol aqueous solution for boosting photocatalytic activity","authors":"Xue-Li Yang , Min Qiu , Zi-Xuan Zhao , Ling Chen , Jun Du , Xing Fan , Bing-Xin Lei , Zhao-Qing Liu","doi":"10.1016/j.apcata.2024.119899","DOIUrl":"10.1016/j.apcata.2024.119899","url":null,"abstract":"<div>Heterojunction fabrication is a general and practical method for producing high-efficiency photocatalysts. The photocatalyst of S-type heterojunction greatly improves the carrier separation efficiency to a certain extent, thereby promoting the degradation efficiency. In this work, we reported a unique S-scheme heterojunction photocatalyst composed of n-type Cs3Bi2Br9 (CBB) and p-type BiOBr with well-defined junction interfaces for photocatalytic degradation of Rhodamine B (RhB). By soaking CBB in an aqueous alcohol solution, the desirable BiOBr/CBB heterostructure was created in-situ, forming the intimate interfaces and facilitating the separation of photogenerated charge carriers. Compared with the pristine CBB, a substantial enhancement in photocatalytic performance of BiOBr/CBB heterostructure was achieved through an optimized water treatment. The results showed that the degradation efficiency of the optimal BiOBr/CBB heterostructure reached 98.55 % in 20 min.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"685 ","pages":"Article 119899"},"PeriodicalIF":4.7,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141961425","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}

引用次数: 0

Review on the poisoning behavior of typical metals on cracking catalysts for chemicals production from petroleum and anti-poisoning strategies 石油化学品生产裂解催化剂上典型金属的中毒行为及防毒策略综述

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-30 DOI: 10.1016/j.apcata.2024.119897

Zhen Xu , Youbing Zhu , Maoming Gong , Nianming Jiao , Tao Zhang , Hui Wang

引用次数: 0

Enhanced catalytic performance for gas phase epoxidation of propylene with H2 and O2 by multiple pretreated Au/TS-1 catalysts 经多重预处理的 Au/TS-1 催化剂提高了丙烯与 H2 和 O2 气相环氧化的催化性能

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-30 DOI: 10.1016/j.apcata.2024.119895

Chenyang Zhao , Yujia Liu , Yupeng Tian , Yahui Li , Junjie Feng , Wei Xu , Ning Shi , Zhe Yang , Bing Sun

{"title":"Enhanced catalytic performance for gas phase epoxidation of propylene with H2 and O2 by multiple pretreated Au/TS-1 catalysts","authors":"Chenyang Zhao , Yujia Liu , Yupeng Tian , Yahui Li , Junjie Feng , Wei Xu , Ning Shi , Zhe Yang , Bing Sun","doi":"10.1016/j.apcata.2024.119895","DOIUrl":"10.1016/j.apcata.2024.119895","url":null,"abstract":"<div>Direct epoxidation of propylene (C3H6) with hydrogen (H2) and oxygen (O2) over Au/TS-1 catalyst was promising way for the synthesis of propylene oxide (PO). However, high selectivity of PO (>95 %) and conversion of C3H6 (>5 %) cannot be achieved at the same time. The industrialization process was severely restricted. In this paper, Au/TS-1 catalysts were synthesized by deposition precipitation method with alkali metal promoter. And alkaline gases and silane coupling post-treatment were performed to promote the catalytic activity. The prepared samples exhibited a much better C3H6 conversion (6.5 %) and PO selectivity (95.1 %) compared with general catalyst using normal synthetic technology. Cs2CO3 was beneficial to increasing Au nanoparticles uptake efficiency. Both NH3 and triethoxyvinylsilane post-treatment were good for smaller and more uniform loading of Au nanoparticles. The decreasing in surface hydroxyl density effectively alleviated the occurrence of PO ring opening isomerization. The increased hydrophobicity of TS-1 surface was conducive to the rapid desorption of generated PO and significantly increased PO selectivity. Multiple pretreatment was also favorable for extending the lifetime of Au/TS-1 catalyst.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"685 ","pages":"Article 119895"},"PeriodicalIF":4.7,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946940","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}

引用次数: 0

Deactivation effect of elemental mercury oxidation over a V2O5-WO3/TiO2 catalyst by Pb in simulated coal-fired flue gas 模拟燃煤烟气中铅对 V2O5-WO3/TiO2 催化剂上元素汞氧化的失活效应

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-26 DOI: 10.1016/j.apcata.2024.119896

Qi Wan , Feiyu Gao , Lei Duan

引用次数: 0

Tuning the amount of Sn0 around Ru to promote hydrodeoxygenation of furfural 调节 Ru 周围的 Sn0 含量以促进糠醛的加氢脱氧反应

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-24 DOI: 10.1016/j.apcata.2024.119894

Wenqiang Ren , Jiamin Tian , Zhiqiang Wang , Minghui Zhang

{"title":"Tuning the amount of Sn0 around Ru to promote hydrodeoxygenation of furfural","authors":"Wenqiang Ren , Jiamin Tian , Zhiqiang Wang , Minghui Zhang","doi":"10.1016/j.apcata.2024.119894","DOIUrl":"10.1016/j.apcata.2024.119894","url":null,"abstract":"<div>2-methylfuran (2-MF) is a high-performance gasoline additive due to its high-octane value and good explosion resistance. In this study, cerium tin oxide solid solutions were prepared by a co-precipitation method. The selectivity of 2-MF and the conversion of furfural significantly improved after doping CeO2 with SnO2. 95 % yield of 2-MF was obtained on 5 %Ru/Ce0.975Sn0.025O2, compared to only 40 % yield on 5 %Ru/CeO2. The reaction rate of furfural over 5 %Ru/Ce0.975Sn0.025O2 was 4.9 times higher than that with 5 %Ru/CeO2. Characterizations show an increased concentration of SnO2 around Ru, and the ratio of Ruδ+/Ru reaches a maximum on 5 %Ru/Ce0.975Sn0.025O2. The binding energy shift of Ru0, Sn0, O, and Ce3+ indicates that the introduction of Sn plays an important role in regulating the interface between Ru and CeO2. The increase of Ruδ+/Ru ratio benefits the hydrodeoxygenation of furfural and contributes to the high yield of 2-MF. This study provides a highly active catalyst for the hydrodeoxygenation of furfural.</div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"685 ","pages":"Article 119894"},"PeriodicalIF":4.7,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949755","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}

引用次数: 0

Enhancing control over individual selectivities of benzene, toluene, and xylene in n-butane aromatization: Impact of reaction and catalytic parameters 加强对正丁烷芳香化过程中苯、甲苯和二甲苯各自选择性的控制：反应和催化参数的影响

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2024-07-23 DOI: 10.1016/j.apcata.2024.119892

Yeseul Hwang , Yong Hyun Lim , Jangeon Roh , Hae Won Ryu , Kihun Nam , Sooyeon Hong , Jong-Ki Jeon , Do Heui Kim

引用次数: 0