Journal of Catalysis最新文献

{"title":"Competitive strain modulation of oxygen reduction reaction in monolayer binary alloy surfaces","authors":"Mailde S. Ozório,&nbsp;Marcus F. Nygaard,&nbsp;Jan Rossmeisl","doi":"10.1016/j.jcat.2025.115988","DOIUrl":"10.1016/j.jcat.2025.115988","url":null,"abstract":"<div><div>Binary alloys of transition metals show great promise as catalyst materials for the cathodic oxygen−reduction reaction (ORR) in polymer−electrolyte−membrane fuel cells. However, their catalytic application is limited by a lack of understanding of the factors influencing the ORR performance. To improve this understanding, we examine the activity of monolayer Au_xPt_1−x surface alloys supported on Pt(111) using density functional theory. We found that the catalytic activity of Au_xPt_1−x/Pt(111) alloys varies significantly with the surface atomic arrangements, where phase−segregated surfaces show higher activity than those with random atomic arrangements. A key factor is a competitive strain influencing the Pt adsorption site activity. Distant Au atoms induce a long−range compressive strain that enhances Pt site activity, while adjacent Au atoms generate tensile strain that slightly reduces the Pt site activity. These findings suggest that surface alloys of elements with dissimilar lattice constants can generate competitive strain effects that modulate the activity of different adsorption sites. Our findings underscore the importance of understanding and controlling atomic arrangements in alloys to ensure good catalytic performance.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115988"},"PeriodicalIF":6.5,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Catalytic CO−O coupling on high-entropy alloys: A composition optimization dependent on the reaction assumptions","authors":"Jack K. Pedersen,&nbsp;Giona Mainardis,&nbsp;Jan Rossmeisl","doi":"10.1016/j.jcat.2025.115983","DOIUrl":"10.1016/j.jcat.2025.115983","url":null,"abstract":"<div><div>Catalytically joining carbon monoxide and oxygen atoms is crucial for various environmental and industrial applications. However, the reaction environments for this process vary significantly across different applications. In this paper, we demonstrate how reaction environments and associated modeling assumptions influence the predictions of optimal disordered alloy catalysts for CO-O coupling. Our analysis is based on a dataset comprising several hundred *CO, *OH, and *O simulated adsorption energies on atomically disordered face-centered cubic (111) surfaces composed of Ag, Au, Cu, Pd, Pt, and Ru. This dataset is provided alongside this publication to support further machine learning-based searches for optimal CO-O coupling catalysts within this composition space for any CO-O coupling application. We illustrate the impact of different modeling assumptions on the identification of CO-O coupling catalysts through two key examples: electrochemical methanol oxidation and CO-tolerant hydrogen fuel cells.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115983"},"PeriodicalIF":6.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electron-driven self-recovery of PtGa bimetallic sub-nanoclusters for enhanced propane dehydrogenation stability","authors":"Jie Xu ,&nbsp;Yanfei Liu ,&nbsp;SenSen Yu ,&nbsp;Yaohui Dun ,&nbsp;Aimin Zhang ,&nbsp;Yunsheng Dai ,&nbsp;Chun Du ,&nbsp;Bin Shan","doi":"10.1016/j.jcat.2025.115980","DOIUrl":"10.1016/j.jcat.2025.115980","url":null,"abstract":"<div><div>Supported PtM bimetallic cluster catalysts exhibit excellent activity in propane dehydrogenation (PDH), owing to the synergistic effects of metal species. However, suppressing the poisonous inactivation of the active sites in harsh environments while preserving their robust activity remains a challenge. In this study, we propose a strategy to mitigate the active sites deactivation and enhance PtGa sub-nanocluster stability via promoting the desorption of coke precursors. As a result, the sub-nanometer PtGa cluster catalyst dispersed by Ga (III) Lewis sites exhibits outstanding specific activity and deactivation constant (<em>k</em>_d). The kinetic and in situ DRIFTS characterizations suggest that the competitive adsorption of H₂ and C₃H₈ on the Pt–Ga^δ+ site at the Pt–GaAlO_x interface optimizes the C–H bond activation. The electron-rich Pt facilitates the migratory behaviors of C₁, C₂, and hydrogen species through electron-transfer effects from partially reduced GaO_x species, thereby facilitating the timely recovery of active sites and contributing to the stability of propane dehydrogenation.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115980"},"PeriodicalIF":6.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050764","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":"Molybdenum catalyzed homogeneous hydrogenation reaction: Recent innovations in catalysts design, modes of activation and reaction mechanisms","authors":"Shu-Fen Hou,&nbsp;Ailing Zhang,&nbsp;Chunling Xin,&nbsp;Mengyuan Zhang","doi":"10.1016/j.jcat.2025.115984","DOIUrl":"10.1016/j.jcat.2025.115984","url":null,"abstract":"<div><div>Transition metal-catalyzed reactions are increasingly recognized as essential in synthetic organic chemistry, due to their occurrence under relatively mild conditions. In this regard, molybdenum (Mo) complexes are considered as an attractive class of catalysts because of their rich redox activities, abundance and low toxicity. Molybdenum catalysis has seen significant advancements in recent years, leading to a diverse range of useful transformations for the activation of E-H bonds. Recent developments in Mo catalysis focusing on the hydrogenation reaction are highlighted in this perspective. Additionally, the synthesis of Mo-based catalysts and the reaction mechanism for hydrogenation are also discussed.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115984"},"PeriodicalIF":6.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044839","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":"Chloridion induced acid sites in covalent organic frameworks for 5‑hydroxymethylfurfural synthesis from fructose","authors":"Biao Meng,&nbsp;Xiaoling Liu,&nbsp;Tao Chen,&nbsp;Xingchen Ling,&nbsp;Yu Zhou,&nbsp;Jun Li,&nbsp;Jun Wang","doi":"10.1016/j.jcat.2025.115985","DOIUrl":"10.1016/j.jcat.2025.115985","url":null,"abstract":"<div><div>The versatile architecture of covalent organic frameworks (COFs) provides a powerful platform for tailoring their functions. Herein, we demonstrate the molecular engineering of 2D ionic COF nanosheets (iCONs) to reach a family of organic polymeric catalysts with tunable acidity. These solid acidic iCONs are synthesized through Schiff base condensation of the ionic monomer triaminoguanidinium chloride and the aromatic aldehydes with different surface groups. Compared with that in the monomer, the Cl^– in iCON matrix tends to be near the framework H atom, generating a new Brønsted acid site with much short Cl^–∼H⁺ distance that resembles HCl. As a result, these iCONs are highly active in the typical acid reactions of aldol condensation and dehydration of fructose into 5-hydroxymethylfurfural (HMF). The shorter Cl^–∼H⁺ distance, the better acid catalytic activity. The catalyst DHPA-TG_Cl reaches a high HMF yield of above 97 % within a short reaction time of 15 min, providing the turnover frequency (TOF) as high as 155.2 h⁻¹. Facile recycling and stable reusability are also observed. The free energy profiles of these iCONs catalyzing fructose conversion to HMF confirm the function of Cl^–∼H⁺ units in lowering the energy barrier of the rate-determining step for the water release in the HMF synthesis.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115985"},"PeriodicalIF":6.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044787","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":"Alkyl PCCP ligands for chromium-catalyzed ethylene tri-/tetramerization: Strong impact of subtle ligand modification on their performance","authors":"Dongchang Liu,&nbsp;Dandan Chen,&nbsp;Xiaohan Rao,&nbsp;Xing Zhao,&nbsp;Jun Zhang","doi":"10.1016/j.jcat.2025.115979","DOIUrl":"10.1016/j.jcat.2025.115979","url":null,"abstract":"<div><div>Chromium complexes based on PCCP ligands of the type R¹R²PC(R⁵)=CHPR³R⁴ having one, two, three, or four <em>P</em>-alkyl groups exhibited high activities in ethylene tri-/tetramerization. The catalytic performance was not only significantly influenced by the number of the <em>P</em>-alkyl group, but also related to the position of the dialkylphosphino or alkylphenylphosphino group in the ligand backbone. Gradually increasing the steric hindrance of the ligands from <em>ⁱ</em>PrPhPC(<em>ⁱ</em>Pr)=CHPPh₂ (<strong>L¹</strong>), to (<em>ⁱ</em>Pr)₂PC(<em>ⁱ</em>Pr)=CHPPh₂(<strong>L²</strong>), to <em>ⁱ</em>PrPhPC(<em>ⁱ</em>Pr)=CHP(<em>ⁱ</em>Pr)₂ (<strong>L³</strong>) or (<em>ⁱ</em>Pr)₂PC(<em>ⁱ</em>Pr)=CHP<em>ⁱ</em>PrPh (<strong>L⁴</strong>), to (<em>ⁱ</em>Pr)₂PC(<em>ⁱ</em>Pr)=CHP(<em>ⁱ</em>Pr)₂ (<strong>L⁵</strong>), resulted in a gradual decrease in 1-octene selectivity from 45.5 wt% to 4.7 wt% and a gradual increase in 1-hexene selectivity from 44.7 wt% to 83.9 wt%. Among them, ligand <strong>L²</strong> with a <em>P</em>-(<em>ⁱ</em>Pr)₂ group achieved a very high activity of 2087 kg/g Cr·h with a high 1-C₆ + 1-C₈ combined selectivity of 92.5 wt% but gave a low 1-C8 selectivity (27.7 wt%). The better overall catalytic performance was obtained by complex <strong>Cr8</strong> based on ligand <strong>L⁸</strong>, Ph(<em>ⁱ</em>Pr)PC(Cy)=CHPPh₂, achieving a high activity of 2111 kg/g Cr·h and a high 1-C₆ + 1-C₈ combined selectivity of 85.8 wt% with a considerable 1-C₈ selectivity (43.5 wt%), along with a very low PE formation (0.07 wt%). We also discovered<!--> <!-->that<!--> <!-->steric<!--> <!-->repulsion<!--> <!-->between the backbone substituent and P(alkyl)₂ or P(alkyl)Ph could significantly influence the catalytic performance. For example, the ligand <strong>L¹⁴</strong> having a PCy₂ group linked with the unsubstituted backbone carbon showed a significant improvement in activity, achieving a remarkable 150 % increase in activity, compared with its isomer, the ligand <strong>L¹¹</strong> having a PCy₂ group linked with the substituted backbone carbon.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115979"},"PeriodicalIF":6.5,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031278","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":"Enhanced catalytic performance of NH4+-exchanged Ti-MWW zeotypes for the liquid-phase epoxidation of alkenes with H2O2","authors":"Yuexia Wang ,&nbsp;Jiaqi Xu ,&nbsp;Xuan Lin ,&nbsp;Chaosi Liu ,&nbsp;Xinqing Lu ,&nbsp;Yijing Gao ,&nbsp;Francesco Pepe ,&nbsp;Domenico Caputo ,&nbsp;Weidong Zhu","doi":"10.1016/j.jcat.2025.115982","DOIUrl":"10.1016/j.jcat.2025.115982","url":null,"abstract":"<div><div>Ti-MWW zeotypes, characterized by their unique dual pore architecture consisting of intralayer 10-membered ring (MR) pore channels and additional interlayer 10-MR pore channels that are interconnected to intracrystalline 12-MR supercages, exhibit a remarkably catalytic superiority in the selective oxidation of small and/or linear alkenes with hydrogen peroxide (H₂O₂), surpassing other titanosilicate zeotypes in performance. However, a further improvement on their catalytic performance is still needed for the industrialization of alkene epoxidation over Ti-MWW. In the present work, the introduction of NH₄⁺ species into Ti-MWW was conducted via a facile but effective treatment of the as-synthesized zeotypes with NH₄Cl, named N-Ti-MWW. The comprehensive characterization of N-Ti-MWW, derived from NH₄⁺-exchanged Ti-MWW, coupled with Density Functional Theory (DFT) calculations, conclusively demonstrates that the integration of NH₄⁺ into Ti-MWW promotes the generation of -Ti-OOH hydroperoxo intermediates, resulting in a higher catalytic activity in alkene epoxidation in comparison to the parent one. Moreover, the solvolysis of epoxides is significantly suppressed on N-Ti-MWW, enabling the catalyst to display a superior selectivity towards the targeted epoxide, thereby improving its overall catalytic performance. Additionally, N-Ti-MWW is reusable, after the regeneration of the deactivated catalyst simply treated with NH₄Cl. As a result, it is anticipated that N-Ti-MWW would be applicable in the industrial epoxidation of alkenes with H₂O₂.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115982"},"PeriodicalIF":6.5,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031277","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":"Epoxidation of propylene by molecular oxygen at low temperature over AgCl-modified Ag-Cu bimetallic catalyst","authors":"Xuequan Sun ,&nbsp;Zhuangzhuang Lai ,&nbsp;Min Ding ,&nbsp;Xiang Zheng ,&nbsp;Haifang Mao ,&nbsp;Wangcheng Zhan ,&nbsp;Li Wang ,&nbsp;Yun Guo ,&nbsp;Haifeng Wang ,&nbsp;Yanglong Guo ,&nbsp;Aiyong Wang","doi":"10.1016/j.jcat.2025.115981","DOIUrl":"10.1016/j.jcat.2025.115981","url":null,"abstract":"<div><div>As molecular oxygen is the cheapest oxidant, the epoxidation of propylene by molecular oxygen is a topic of great interest and also the most challenge topic in the heterogeneous catalysis. However, the epoxidation of propylene by only molecular oxygen has yet to be optimised to a significant extent. Here we show, AgCl-modified Ag₂₀Cu/BaCO₃ bimetallic catalysts, prepared by <em>in situ</em> reduction co-deposition methods, were demonstrated to exhibit excellent catalytic activity for the epoxidation of propylene. First-principles density functional theory calculations were carried out to explore the inherent reaction mechanism and promotion effect of Cu and Cl addition. The addition of AgCl to Ag₂₀Cu/BaCO₃ bimetallic catalyst inhibited total oxidation of propylene, but enhanced both the rate of PO formation and PO selectivity. The highest PO selectivity of ∼100 % was achieved over 2400 ppm AgCl-Ag₂₀Cu-/BaCO₃ bimetallic catalyst at 80 °C.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115981"},"PeriodicalIF":6.5,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031279","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":"FTIR study of low-temperature CO adsorption on reduced ceria nanoparticles with different morphology: A comparison with oxidized samples","authors":"Kristina K. Chakarova ,&nbsp;Bayan S. Karapenchev ,&nbsp;Nikola L. Drenchev ,&nbsp;Elena Z. Ivanova ,&nbsp;Hristiyan A. Aleksandrov ,&nbsp;Dimitar A. Panayotov ,&nbsp;Mihail Y. Mihaylov ,&nbsp;Georgi N. Vayssilov ,&nbsp;Konstantin I. Hadjiivanov","doi":"10.1016/j.jcat.2025.115986","DOIUrl":"10.1016/j.jcat.2025.115986","url":null,"abstract":"<div><div>The unique catalytic properties of ceria and ceria-based materials are primarily determined by the easy switching between Ce³⁺ and Ce⁴⁺ oxidation states on the catalyst surface. This redox process is also important for other applications of ceria-based materials, such as their biomedical use. Therefore, in situ determination of the oxidation state of cerium cations located on different ceria planes is important. One of the most commonly used and informative techniques in this regard is IR spectroscopy of adsorbed CO. However, there is still strong disagreement in the interpretation of the carbonyl bands on ceria. In this work, we report the results of CO adsorption on reduced ceria nanoshapes (cubes, polyhedra and rods having different proportions of exposed {100}, {110} and {111} facets) and compare them with the results obtained with non-reduced samples. The reduction degree was monitored by the ²F_5/2 → ²F_7/2 spin–orbit electronic transition of Ce³⁺ at 2133–2095 cm⁻¹. In addition to the experiments, DFT simulations were performed. The ν(CO) frequency of adsorbed CO was found to undergo various shifts after reduction of cerium cations on different planes. Thus, for an intermediate coverage, ν(CO) on stoichiometric ceria {100}, {110} and {111} facets is ca. 2162, 2171 and 2152 cm⁻¹, respectively, while for reduced surfaces, at 2151, 2146 and 2160 cm⁻¹, respectively. The reasons for the different shift values and directions are discussed. Adsorption of CO on reduced samples also causes a red shift of some components of the Ce³⁺ 4f electronic band which could be misinterpreted to formation of carbonyl species. In conclusion, CO as an IR probe molecule can provide information about the existence of Ce⁴⁺ and Ce³⁺ sites on the surface. However, the regions of the carbonyl bands of Ce⁴⁺ and Ce³⁺ overlap in the range 2162–2150 cm⁻¹. For a correct interpretation of the bands in this region, further analysis should be performed.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115986"},"PeriodicalIF":6.5,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Superior photocatalytic activity of Pt-loaded rutile-type TiO2 particles in brine splitting reaction","authors":"Takumi Okada ,&nbsp;Masanori Kodera ,&nbsp;Yugo Miseki ,&nbsp;Takahiro Gunji ,&nbsp;Kazuhiro Sayama","doi":"10.1016/j.jcat.2025.115969","DOIUrl":"10.1016/j.jcat.2025.115969","url":null,"abstract":"<div><div>A Pt-loaded rutile-type TiO₂ photocatalyst was investigated for splitting brine (aqueous NaCl solution) into hydrogen and chlorine as a new artificial photosynthesis reaction. Although most of Pt species dissolved in solution during induction period, the small amount of Pt remaining on the TiO₂ surface was active and stable, resulting in continuous hydrogen and chlorine production for 40 h at a catalytically sufficient turnover number. The photocatalytic activity of Pt-loaded TiO₂ increased to more than 10 times the previously reported value, and the quantum efficiency and solar energy conversion efficiency reached 4.3 % at 365 nm and 0.07 %, respectively. Notably, this activity is also higher than that reported for one-step pure water splitting reactions using TiO₂-based photocatalysts. Although chlorine production is thermodynamically more challenging than the oxygen evolution reaction, chlorine production involving a two-electron oxidation process is more kinetically favorable than oxygen production involving a four-electron oxidation process, which is considered as the rate-determining step. Our findings open a new direction for brine splitting and also enrich the field of artificial photosynthetic reactions.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"443 ","pages":"Article 115969"},"PeriodicalIF":6.5,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143027051","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}