Journal of Catalysis最新文献

{"title":"Tuning the electron structure of single-atom Fe catalyst for designed peroxymonosulfate activation and phenols degradation","authors":"Ting He ,&nbsp;Yuwei Lu ,&nbsp;Shihao Han ,&nbsp;Jingbin Hu ,&nbsp;Pan Gao ,&nbsp;Feng Xiao ,&nbsp;Shaoxia Yang","doi":"10.1016/j.jcat.2024.115920","DOIUrl":"10.1016/j.jcat.2024.115920","url":null,"abstract":"<div><div>Transition metal single atom catalysts (SACs) for boosting peroxymonosulfate (PMS) activation involving complex catalytic mechanism and multiple reaction pathways have received much attention, but regulating the reaction pathway of SACs is still an important challenge in the PMS-mediated Fenton-like reaction. Herein, a boron-doped Fe SAC with FeN₃B configurations (Fe—BNC) was synthesized and selectively generated a non-radical pathway, in which the high-valent iron-oxo species (Fe^IV<img>O) were determined as the main reactive oxygen species (ROS) by PMS activation. The Fe-BNC/PMS system not only exhibited remarkable reaction kinetic constant (0.949 min⁻¹) and turnover frequency (9.49 L min⁻¹g⁻¹) for the phenol degradation, but also showed excellent selectivity to phenols with strong electron-donating ability. Mechanism exploration based on theoretical calculations revealed that high activity of Fe-BNC originated from the reinforced adsorption energy and enhanced overlap between Fe 3d and O 2p orbits, which facilitated to strengthen the Fe-O bonding and accelerate the electron transfer, thus modulating the PMS activation via a non-radical pathway. Successful extendibility of Fe-BNC in treatment of the real water and coking wastewater demonstrates its application potential. This work elucidates the mechanism of selectively generating a non-radical pathway over B-doped Fe-based SAC, and provides a rational strategy for preparing SACs alone with a non-radical pathway.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"442 ","pages":"Article 115920"},"PeriodicalIF":6.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Pd site structural changes on Wacker oxidation of ethylene over PdCu/zeolites","authors":"Deepak Sonawat,&nbsp;Patrick G. Granowski,&nbsp;Tara T. DuBridge,&nbsp;Siddarth H. Krishna","doi":"10.1016/j.jcat.2024.115901","DOIUrl":"10.1016/j.jcat.2024.115901","url":null,"abstract":"<div><div>Heterogeneous Wacker oxidation over PdCu/zeolites could replace corrosive PdCu-chlorides for selective oxidation of olefins to carbonyl compounds. Wacker oxidation is traditionally thought to occur on Pd ions, while PdO clusters are assumed to be inactive. Here, we combined Pd ion titrations, X-ray absorption spectroscopy (XAS), and reaction kinetics measurements on a PdCu/Faujasite material (1 wt% Pd, 4 wt% Cu, Si/Al 2.6) to investigate how high-temperature air treatments impact the structure of Pd sites and their reactivity for Wacker oxidation of ethylene to acetaldehyde. The fraction of ionic Pd was assessed through NH₄⁺-ion back-exchange corroborated by XAS. As-synthesized catalysts contain solely Pd²⁺ ions, which are progressively converted to small PdO clusters upon calcination in air at elevated temperature (573 K, 773 K), creating a series of materials with varying fractions of ionic Pd. Wacker rates (per Pd, 378 K, 3 kPa H₂O) are invariant across these materials, showing, counterintuitively, that Pd ions and PdO clusters are similar active site precursors for Wacker oxidation at the conditions studied here. Post-reaction XAS confirms the absence of significant restructuring between PdO clusters and Pd ions following exposure to Wacker reaction conditions. We further performed <em>in situ</em> XAS during reduction and oxidation transients to understand the fraction of redox-active Pd and Cu. While most Pd²⁺ and Cu²⁺ ions are reducible in ethylene + H₂O to sub-nanometer Pd⁰ clusters and Cu⁺ ions, Pd⁰ clusters are recalcitrant to re-oxidation by O₂ (378 K), implying that rapid Pd re-oxidation is needed to avoid sintering. While catalysts deactivate during reaction or under reducing conditions, calcination removes coke and regenerates an active pool of Pd ions and PdO clusters. This work provides new insights into Pd active sites and their stability for Wacker oxidation over PdCu-zeolites.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"442 ","pages":"Article 115901"},"PeriodicalIF":6.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142804813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diatomic cobalt–catalyzed cyclization of o-aminobenzyl alcohol with amidine for the synthesis of quinazolines","authors":"Guozhang Fu ,&nbsp;Yunong Li ,&nbsp;Zhuoqun Hou ,&nbsp;Shasha Wang ,&nbsp;Shaohua Jiang ,&nbsp;Tianxiang Chen ,&nbsp;Tsz Woon Benedict Lo ,&nbsp;Xiuwen Chen","doi":"10.1016/j.jcat.2024.115889","DOIUrl":"10.1016/j.jcat.2024.115889","url":null,"abstract":"<div><div>This article describes the development of a stable and reusable diatomic cobalt catalyst for the synthesis of various quinazoline derivatives via the dehydrogenation cyclization reaction of anthranilic alcohol with amidine in a simple and environmental friendly manner. Crystallographic studies reveal that the superior catalytic reactivity can be attributed to the synergistic cooperation between the adjacent cobalt active centers within a confined domain for the co-adsorption and co-activation of substrates. This work provides new insights into the application of heterogeneous catalysts in organic synthesis.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"442 ","pages":"Article 115889"},"PeriodicalIF":6.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142804821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Palladium-catalyzed carbonylative synthesis of 13C-labeled flavones","authors":"Zijun Huang ,&nbsp;Xiaolin Jiang ,&nbsp;Zhaowu Yan ,&nbsp;Pengtao Liu ,&nbsp;Junyong Dong ,&nbsp;Bing Yi ,&nbsp;Zhengjun Fang ,&nbsp;Yuehui Li","doi":"10.1016/j.jcat.2025.115993","DOIUrl":"10.1016/j.jcat.2025.115993","url":null,"abstract":"<div><div>¹³C-labeled compounds are invaluable in drug discovery as lead compounds and as tracers for studying drug bioavailability and pharmacodynamics. However, these approaches are mainly limited to high-value chemical labeling materials and low atom economy multistep synthesis. Herein, we report a highly efficient Pd-catalyzed reductive carbonylation method for the synthesis of ¹³C-labeled flavones using near-stoichiometric [¹³C]CO₂. With aromatic alkynes, aliphatic alkynes and substituted 2-iodophenols as the reaction partners, the corresponding ¹³C-labeled flavones were obtained in good yields with excellent functional group tolerance. Mechanistic studies suggest that the phenolic group accelerates CO₂ mass transfer, followed by intramolecular migration and the formation of key acylpalladium intermediates. Notably, para-<em>t</em>Bu substituted ¹³C-flavone results in a more pronounced enhancement of antitumor efficacy compared to ester or OMe substitutions, relative to their ¹²C analogs.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115993"},"PeriodicalIF":6.5,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification of Pt co-catalyst on SrTiO3 with amorphous FeOx towards enhanced photocatalytic overall water splitting","authors":"Mingge Zhai ,&nbsp;Zheng Li ,&nbsp;Rengui Li ,&nbsp;Zhendong Feng ,&nbsp;Qingnan Wang ,&nbsp;Chengbo Zhang ,&nbsp;Haibo Chi ,&nbsp;Na Ta ,&nbsp;Can Li","doi":"10.1016/j.jcat.2025.115989","DOIUrl":"10.1016/j.jcat.2025.115989","url":null,"abstract":"<div><div>Sunlight-driven overall water splitting (OWS) using particulate photocatalysts presents a promising strategy for a sustainable clean energy supply. Noble metals like platinum (Pt) are frequently employed as a hydrogen evolution reaction (HER) co-catalyst for photocatalytic OWS reaction. However, understandings on the dynamic evolution of co-catalysts during photocatalytic OWS remain poor and there lacks effective approaches to mediate this process as well as the metal-hydrogen interaction for efficient H₂ evolution. In this work, using Pt/SrTiO₃ photocatalyst as a model, we studied the change of Pt co-catalyst from PtO_x to metallic Pt, and developed an amorphous FeO_x modifier to promote this process by accelerating charge transfer to stabilize Pt in its metallic state, thereby thermodynamically facilitating HER by maintaining the Pt potential within a favorable range. Additionally, it weakens the Pt-H interaction, thereby promoting product release during photocatalytic OWS. This modification of amorphous FeO_x exhibits universality on various noble metals co-catalysts such as Rh, Pd, Ru and Ni, paving the way for constructing efficient co-catalysts in photocatalysis and photoelectrochemistry.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115989"},"PeriodicalIF":6.5,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated activation and conversion of CO2 and propargylamine by a robust multi-active site copper catalyst","authors":"Lingfang Kong ,&nbsp;Yi Liu ,&nbsp;Zhonggao Zhou ,&nbsp;Zhichao He ,&nbsp;Yun Bai ,&nbsp;Guohai Xu ,&nbsp;Yunxiang Pan ,&nbsp;Hongyu Zhen ,&nbsp;Yiwang Chen","doi":"10.1016/j.jcat.2025.115992","DOIUrl":"10.1016/j.jcat.2025.115992","url":null,"abstract":"<div><div>The conversion of carbon dioxide (CO₂) and propargylamines to 2-oxazolidinones is an essential reaction in industry, but efficiently activating both feedstocks remains a huge challenge for majority of catalysts. Herein, we developed a long-term stable copper catalyst, co-coordinated with sugar acetates (acetylglucose, AcGlu) and 2-methyl-imidazolium (Im-Cu <strong>A</strong>). This catalyst features multi-active site, enabling it to efficiently capture and activate CO₂, activate propargylamines, and stabilize the catalyst species simultaneously. As expected, 2-oxazolidinone was synthesized by this cyclization reaction with an exciting turnover frequency of 880 h⁻¹, which is around 180 times higher than that of CuCl₂. Moreover, the catalytic activity of Im-Cu <strong>A</strong> did not decrease even after 20 replicates, which is exceptionally rare for homogeneous catalysts. Density functional theory calculations indicate that the electron-donating AcGlu and 2-methyl-imidazolium units facilitate electrons transport from Im-Cu <strong>A</strong> to CO₂. Moreover, the high electron density of AcGlu and 2-methyl-imidazolium groups is believed to play a crucial role in the long-term stability across various temperatures and excellent catalytic performance of Im-Cu <strong>A</strong>. This represents a significant advancement in the development of a highly stable copper catalyst with multi-active site that effectively activates all reaction substrates. This strategy could improve the development of metal catalysts with sustained superior performance for CO₂ conversion.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115992"},"PeriodicalIF":6.5,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanistic insights into the selectivity switch in CO2 reduction over Ni/SiO2 and NiMo/SiO2 catalysts: A combined study of temperature programmed desorption, infrared spectroscopy and kinetics","authors":"Ruoyu Zhang ,&nbsp;Chang-Jun Liu ,&nbsp;Jinyu Han ,&nbsp;Qingfeng Ge ,&nbsp;Xinli Zhu","doi":"10.1016/j.jcat.2025.115994","DOIUrl":"10.1016/j.jcat.2025.115994","url":null,"abstract":"<div><div>A combined temperature programmed desorption (TPD), infrared (IR) spectroscopy and kinetic modeling was performed to investigate the reaction mechanism of CO₂ reduction on Ni/SiO₂ and NiMo/SiO₂ (Ni/Mo molar ratio of 1) and to reveal the role of MoO_x in switching the product from CH₄ to CO. The results of CO_2, CO and H₂ TPD demonstrated that the presence of MoO_x enhances CO₂ adsorption, facilitates CO desorption, and weakens hydrogenation ability on the Ni catalysts. The IR results indicate the reaction proceeds with the direct dissociation of CO₂ to CO*, which either desorbs as CO or undergoes further hydrogenation to CH₄ on both catalysts, with formate acting as a spectator in the process. Compared with Ni/SiO₂, the reaction order of CO₂ decreased while the order of H₂ increased significantly for CO formation on NiMo/SiO₂, indicating a change in the rate-determining steps. Langmuir-Hinshelwood kinetic modeling confirmed that the formation of CO and CH₄ on Ni/SiO₂ was rate-limited by desorption of CO* and hydrogenation of CO*, respectively. In contrast, on NiMo/SiO₂, the formation of CO is rate-limited by hydrogenation of OH* to H₂O*. These findings demonstrate that coverage of MoO_x on Ni eliminates large surface Ni ensembles and creates MoO_x/Ni interfacial sites, which facilitate CO₂ activation, promote CO desorption and weaken hydrogenation. Consequently, the rate-determining step for CO formation shifts from CO* desorption on Ni/SiO₂ to OH* hydrogenation on NiMo/SiO₂, which also suppresses CH₄ formation and results in CO as the dominant product on NiMo/SiO₂.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115994"},"PeriodicalIF":6.5,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Engineering atomic rhodium sites on conjugated porous monophosphine polymers for superior heterogeneously catalytic hydroformylation and hydrosilylation of alkenes","authors":"Min Xu ,&nbsp;Dexi Yang ,&nbsp;Hu Fang ,&nbsp;Zuowei Sun ,&nbsp;Shaokun Tao ,&nbsp;Siheng Yang ,&nbsp;Ruixiang Li ,&nbsp;Hua Chen ,&nbsp;Chong Cheng ,&nbsp;Xiaolin Wang ,&nbsp;Tian Ma ,&nbsp;Xueli Zheng","doi":"10.1016/j.jcat.2025.115977","DOIUrl":"10.1016/j.jcat.2025.115977","url":null,"abstract":"<div><div>Efficient rhodium-based heterogeneous catalysts with exceptional catalytic activity and efficient atom utilization are crucial for converting alkene feedstocks into valuable fine chemicals. Phosphine-functionalized porous organic polymers (POP) have emerged as promising supports for rhodium catalysts. Herein, we synthesize atomic Rh sites coordinated on conjugated porous monophosphine polymers (Rh@POP) for superior heterogeneously catalytic hydroformylation and hydrosilylation of alkenes. The Rh@POP features triphenyl phosphine-Rh coordination and alkenyl nitrile conjugation. A 2.3 % Rh@POP catalyst (Rh mass loading 2.3 wt%) exhibits exceptional activity and selectivity in mild hydroformylation and hydrosilylation of alkenes. The turnover frequency (TOF) reaches 5549 h⁻¹ in hydroformylation of 1-octene. Remarkably, this catalyst maintains consistent reactivity over 6 recycling runs. The high dispersion of rhodium atoms, phosphine coordination, and alkenyl nitrile-containing POP framework contribute to its outstanding performance. This study offers insights into designing single-atom heterogeneous catalysts with high activity and recyclability, effectively combining the merits of homogeneous and heterogeneous catalysis.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115977"},"PeriodicalIF":6.5,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient photocatalytic C(sp3)-H oxidation of ethylbenzene enhanced by photochromic Mo-doped BiOCl ultrathin nanosheets","authors":"Derong Kong,&nbsp;Guanfeng Ji,&nbsp;Yao Dou,&nbsp;Mei Yan,&nbsp;Yun Zhang,&nbsp;Wenshou Wang","doi":"10.1016/j.jcat.2025.115987","DOIUrl":"10.1016/j.jcat.2025.115987","url":null,"abstract":"<div><div>The photocatalytic activation of C(sp³)-H bonds has exhibited great potential for producing high-value chemicals. However, the poor charge separation and transfer efficiency as well as limited active sites of semiconductor photocatalysts restrict photocatalytic performance. Herein, we report the photochromic Mo-doped BiOCl ultrathin nanosheets with abundant oxygen vacancies for efficient photocatalytic oxidation of C(sp³)-H of ethylbenzene. Mo-doping effectively extends the light absorption of BiOCl to visible range and empowers BiOCl visible-light-responsive photochromic properties. The photochromic effect induced Mo⁶⁺/Mo⁵⁺ species could act as electron trapping centers for capturing photogenerated electrons to improve the separation and transfer efficiency of photogenerated charges, and thus promoting the photogenerated holes to oxidize ethylbenzene to its benzyl radicals. The abundant oxygen vacancies in Mo-doped BiOCl ultrathin nanosheets act as active sites for enhancing adsorption and activation of the O₂ to O₂^<img>− by photogenerated electrons stored at Mo⁶⁺/Mo⁵⁺ species and oxygen vacancies. The reduction of O₂ and oxidation of C(sp³)-H bonds can be effectively accomplished to produce acetophenone. The Mo-doped BiOCl ultrathin nanosheets display an excellent acetophenone production rate of 8033 μmol·g⁻¹·h⁻¹, which is 9 times higher than that of undoped BiOCl. This work shows that photochromic catalysts would provide a new way to design efficient photocatalysts for activation of C(sp³)-H bonds.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115987"},"PeriodicalIF":6.5,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ir-catalyzed hydroaminomethylation of olefins with formic acid as hydrogen source","authors":"Lu-Yao Tian ,&nbsp;Zhen-Tao Zhang ,&nbsp;Long-Li Zhang ,&nbsp;Huan Liu ,&nbsp;Da Yang","doi":"10.1016/j.jcat.2025.115991","DOIUrl":"10.1016/j.jcat.2025.115991","url":null,"abstract":"<div><div>Formic acid (FA) is a neat and safe source of hydrogen storage. In this paper, PPh₃-based Ir catalyst was applied to the hydroaminomethylation of olefins with FA as the hydrogen source successfully. The conversion of 1-octene reached 99 % under the optimal reaction conditions (150 °C, 20 h, P/Ir = 1/1, CO 3.0 MPa, NMP as the solvent), and the product amine’s selectivity was 92 %. The catalytic system was also suitable for a variety of aliphatic, aromatic α-olefins and cycloolefins. It was demonstrated that the reaction system underwent the following steps: the dehydrogenation of FA to release H₂; the hydroformylation of olefins to aldehydes; the condensation of amines and aldehydes to enamines; and the reduction of enamines by H₂ to produce amines. <em>In situ</em> high-pressure ¹H NMR spectroscopy analyses proved that the Ir–H species were facilitated by the involving of FA, which played crucial roles in hydroaminomethylation. Additionally, mercury poisoning test indicated the homogeneous nature of the catalytic process.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115991"},"PeriodicalIF":6.5,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}