Catalysis Science & Technology最新文献

{"title":"Designing a Rh-based bimetallic catalyst for heterogeneous ethylene hydroformylation: combining theoretical predictions and experimental screening†","authors":"Ning Huang ,&nbsp;Yue Ma ,&nbsp;Boyang Liu ,&nbsp;Letong Yang ,&nbsp;Xiaocheng Lan ,&nbsp;Xiaodong Wu ,&nbsp;Tiefeng Wang","doi":"10.1039/d4cy00959b","DOIUrl":"10.1039/d4cy00959b","url":null,"abstract":"<div><div>An approach to the design of a Rh-based bimetallic catalyst for ethylene hydroformylation was introduced. Among late 3d transition metals (Fe, Co, Ni, Cu and Zn), the thermodynamic feasibility of alloying with Rh was evaluated using phase diagrams, with Cu excluded from consideration. The reducibility of the oxide precursor to form an alloy with Rh was examined by H₂ temperature-programmed reduction (H₂-TPR), further excluding Fe and Zn from the potential alloying elements. Density functional theory (DFT) calculations were employed to select descriptors for catalytic performance, suggesting that a lower CO adsorption energy would enhance hydroformylation activity, and a larger difference between CO and H adsorption energies would promote selectivity to aldehydes and alcohols (oxy selectivity), suggesting that Co would be a better alloying element than Ni. As predicted, a RhCo bimetallic catalyst was successfully synthesized, which showed the highest oxy yield in ethylene hydroformylation among all the bimetallic catalysts, with a superior selectivity compared to that of a monometallic Rh catalyst.</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 1113-1121"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A mini review on photocatalytic lignin conversion into monomeric aromatic compounds†","authors":"Shibo Shao ,&nbsp;Xiangzhou Wang ,&nbsp;Wenbing Li ,&nbsp;Yiming Zhang ,&nbsp;Shi Liu ,&nbsp;Weisheng Xiao ,&nbsp;Zongyang Yue ,&nbsp;Xu Lu ,&nbsp;Xianfeng Fan","doi":"10.1039/d4cy01187b","DOIUrl":"10.1039/d4cy01187b","url":null,"abstract":"<div><div>To meet the growing demand for chemicals and energy while minimizing environmental impact, it is necessary to employ sustainable resources instead of fossil fuel feedstock and develop green processes to upgrade the chemical industry. Lignin, as the only abundant natural aromatic structured biomass, has been identified as a promising feedstock for producing monomeric aromatics through the depolymerisation process. However, the robust structure of lignin, coupled with the limitations of conventional catalytic methods, presents significant challenges for converting lignin into aromatic monomers. Recently, photocatalysis has emerged as a remarkable platform for versatile lignin transformation and has achieved some significant progress. The unique photogenerated reactive species as well as the mild reaction conditions enable the selective cleavage of targeted interunit bonds in lignin while preserving the aromatic structures and functional groups for further processing. In this review, we aimed to provide an overview of the state-of-the-art advances in key photocatalytic processes applied for the conversion of lignin using various photocatalysts. This review focuses on the latest investigations into lignin conversion mechanisms, emphasizing selective C–O and C–C bond cleavage. Additionally, we discuss catalyst modification strategies and key factors influencing the lignin conversion process based on significant recent publications. Furthermore, we elucidate future perspectives and challenges for the photocatalytic conversion of lignin into valuable products. Hopefully, this mini review will inspire future work on the photocatalytic lignin conversion process to achieve lignin valorisation and a sustainable supply of aromatic chemicals.</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 962-987"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/cy/d4cy01187b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430670","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}

{"title":"Transition metal atoms embedded in monolayer C13N3 as OER/ORR bifunctional electrocatalysts†","authors":"Xiaoxue Yu ,&nbsp;Junkai Xu ,&nbsp;Yunhao Wang ,&nbsp;Jianjun Fang ,&nbsp;Xianfang Yue ,&nbsp;Breno R. L. Galvão ,&nbsp;Jing Li","doi":"10.1039/d4cy01160k","DOIUrl":"10.1039/d4cy01160k","url":null,"abstract":"<div><div>Developing bifunctional electrocatalysts for efficiently catalyzing the oxygen evolution/reduction reaction (OER/ORR) is essential for water electrolysis and other processes. Herein, we have investigated the OER and ORR performance of monolayered TM-C₁₃N₃ by first-principles calculations, where TM includes Cr, Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, and Au. The results show that Pt-C₁₃N₃ has excellent bifunctional OER/ORR activity with overpotentials of 0.27 V for the OER and 0.39 V for the ORR. In addition, volcano plots and contour maps based on the linear relationship between the adsorption energies of oxygenated intermediates were established to characterize the OER/ORR activity trends of TM-C₁₃N₃. The origin of the OER/ORR activity is revealed by analyzing Bader charges, the d-band center, and the crystal orbital Hamiltonian population (COHP).</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 1122-1133"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovations and fundamentals in visible light-driven photocatalysis for CO2 reduction","authors":"Rajesh Sahu ,&nbsp;Tarun Patodia ,&nbsp;Sakshi Juyal ,&nbsp;Fateh Singh Gill ,&nbsp;Brijesh Prasad ,&nbsp;Ankur Jain","doi":"10.1039/d4cy01305k","DOIUrl":"10.1039/d4cy01305k","url":null,"abstract":"<div><div>Visible light-induced photocatalysis has attracted significant attention as a sustainable strategy to mitigate climate change by reducing CO₂. This process uses semiconductor materials to convert CO₂ into valuable chemicals and fuels under visible light, providing an environmentally friendly alternative to traditional energy-intensive methods. This review explores the fundamental principles and innovative photocatalysts, including metal-based, metal-free and hybrid systems, aimed at enhancing photocatalytic efficiency and selectivity. It begins with an overview of the basic mechanisms of photocatalysis, including charge generation, separation, and recombination, and examines the thermodynamic factors that influence CO₂ reduction, such as temperature, light intensity, and the properties of the semiconductor material. Key challenges are explored, such as improving light absorption properties, increasing reaction rates, and optimizing charge carrier dynamics. Recent advancements in material design, nanostructuring, and doping techniques have shown promising results in improving photocatalytic CO₂ conversion. Future research will focus on addressing the scalability, stability, and efficiency of photocatalytic systems, as well as exploring the potential for coupling CO₂ reduction with renewable energy sources for practical applications.</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 988-1002"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phosphate modulated nitrogen-doped titanium dioxide/carbon nitride heterogeneous photocatalysts with efficient O2 activation for ametryn degradation†","authors":"Xingyang Feng ,&nbsp;Changmei Zhao ,&nbsp;Junjie Zhou ,&nbsp;Fangzhu Shi ,&nbsp;Rui Yan ,&nbsp;Zhiqiang Wang","doi":"10.1039/d4cy01167h","DOIUrl":"10.1039/d4cy01167h","url":null,"abstract":"<div><div>4P-5NT/CN nanocomposites with high O₂ activation and charge separation properties were synthesized <em>via</em> wet chemistry and calcination for photocatalytic degradation of ametryn (AME). With their wide visible light absorption range, the 4P-5NT/CN nanocomposites exhibited excellent charge transfer and separation properties, which significantly improved the photocatalytic degradation of AME by CN photocatalysts. The Z-type charge transfer mechanism between N-doped TiO₂ (NT) and g-C₃N₄ (CN) and the high oxygen adsorption oxygen activation function of surface-modified phosphoric acid were crucial to the improved photocatalytic performance. The improved oxygen activation performance further induced the generation of more active species and accelerated the interaction with AME to initiate degradation. Results showed that the photocatalytic degradation of AME by 4P-5NT/CN was 25.8 times greater than that by pure CN under optimal loading conditions. Oxygen temperature-programmed desorption (O₂-TPD) experiments showed that H₃PO₄ promoted the physical adsorption of O₂ on the surface of the material, effectively facilitating oxygen activation and inducing ·O₂⁻ generation. Reactive oxide species (ROS) were determined through ESR and free radical capture detection. The intermediate fragmentation products of AME degradation were detected using liquid chromatography-tandem mass spectrometry (LC-MS/MS), and the synergistic degradation pathways of ·O₂⁻ and ·OH were obtained. The synergistic effect is reflected in the fact that ·O₂⁻ tends to attack the ethyl chain, triggering the degradation reaction, whereas ·OH tends to attack the sulfur methyl group, ultimately leading to better mineralisation. This work reveals the selection pattern of AME active sites by ROS during photocatalytic degradation and provides a new idea for the design of visible-light-driven high-oxygen-activity photocatalysts for the efficient treatment of environmental pollutants with effective mineralisation.</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 1174-1184"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hexagonal In2O3 short nanorods rich in O vacancy-defects toward promoting highly efficient photothermal CO2 reduction into C2H5OH†","authors":"Kai Zhao ,&nbsp;Qiutong Han ,&nbsp;Zhe Lu ,&nbsp;Yubin Zheng ,&nbsp;Boye Zhou ,&nbsp;Haoqiang Chi ,&nbsp;Dawei Liu ,&nbsp;Lu Wang ,&nbsp;Zhigang Zou ,&nbsp;Yong Zhou","doi":"10.1039/d4cy01376j","DOIUrl":"10.1039/d4cy01376j","url":null,"abstract":"<div><div>Harnessing solar energy to catalytically reduce CO₂ into chemical fuels represents a promising solution to simultaneously address the energy crisis and global warming. However, the efficient and selective synthesis of high value-added products under relatively mild conditions remains a challenge. Herein, a catalyst composed of hexagonal In₂O₃ (abbrev. as h-In₂O₃) short nanorods with a high specific surface area was synthesized <em>via</em> a straightforward solvothermal method. Compared to commercial cubic In₂O₃ (abbrev. as com-In₂O₃), the h-In₂O₃ short nanorods exhibited high yield in the photothermal reduction of CO₂ to CO, CH₄, CH₃OH, and C₂H₅OH, using water vapor as the reducing agent. With oxygen vacancies being introduced into h-In₂O₃ through H₂ treatment, C₂H₅OH yield rate represents a remarkable 5.89 times and 13.22 times higher than h-In₂O₃ and com-In₂O₃, respectively. The product selectivity of C₂H₅OH for V_O-In₂O₃ reached an impressive 47.07%, far surpassing 11.37% for com-In₂O₃ and 12.84% for h-In₂O₃. Electrochemical measurement and <em>in situ</em> DRIFTS spectra indicate that the introduction of O vacancies could contribute to the reduced recombination of photogenerated carriers and the enhanced dissociation of H₂O, which may be beneficial to the improvement of C₂H₅OH yield and selectivity.</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 1090-1095"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient photocatalytic selective oxidation of 5-hydroxymethylfurfural on Bi24O29Br10(WO4)2 solid solution via enhanced charge separation†","authors":"Yingxin Guo ,&nbsp;Ming Gong ,&nbsp;Xin Xu ,&nbsp;Yuming Dong ,&nbsp;Guangli Wang","doi":"10.1039/d4cy01420k","DOIUrl":"10.1039/d4cy01420k","url":null,"abstract":"<div><div>The photocatalytic oxidation of biomass-derived structural units such as 5-hydroxymethylfurfural is a promising reaction for obtaining valuable chemicals and effectively storing solar radiation for long periods. In this work, we developed a Bi₂₄O₂₉Br₁₀(WO₄)₂ solid solution photocatalyst for the selective oxidation of 5-hydroxymethylfurfural to produce 2,5-diformylfuran. The doping of WO₄²⁻ allows for effective separation of photogenerated charges, thereby enhancing the utilization of both photogenerated holes and reactive oxygen species in the reaction. Under optimal conditions, the conversion rate of 5-hydroxymethylfurfural reached 98.9%, and the selectivity for 2,5-diformylfuran reached 92.5%, making it one of the best-performing photocatalytic systems in this field. This work provides a new strategy for the development of efficient bismuth-based photocatalysts for selective oxidation in organic reactions.</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 1061-1069"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unravelling the deactivation of CuZnO-based catalysts at the industrial scale: a micro to macro scale perspective†","authors":"Vera P. Santos ,&nbsp;Ewa Tocha ,&nbsp;Jin Yang ,&nbsp;Mark McAdon ,&nbsp;Carla Schmidt ,&nbsp;Stuart Leadley ,&nbsp;David Yancey ,&nbsp;Stefan van Bloois ,&nbsp;Joost Depicker ,&nbsp;Swati Naik ,&nbsp;Linh Bui ,&nbsp;Saurabh Bhandari ,&nbsp;Daniel Grohol ,&nbsp;David G. Barton","doi":"10.1039/d4cy01323a","DOIUrl":"10.1039/d4cy01323a","url":null,"abstract":"<div><div>Unexpected changes in catalyst performance can have a significant impact on manufacturing plant operations with respect to both economics and sustainability. The useful lifespan of a catalyst is influenced by various factors, including catalyst performance aging (activity and selectivity), or the mechanical damage of catalyst pellets leading to high reactor pressure drops. Deactivation of industrial catalysts often results from thermal (metal sintering, loss of active surface areas, and vaporization), chemical (poisons: inorganic and organic and fouling), and mechanical mechanisms (abrasion, fracture, and dusting). Conducting a proper root-cause analysis can be complex and typically requires multidimensional fundamental scientific approaches. This study illustrates the mechanical degradation of CuZnO catalyst pellets under industrial hydrogenation conditions, leading to an increased pressure drop and reduced catalyst lifetime. Post-mortem analysis at different length scales in combination with the development of accelerating aging tools played a substantial role in the identification of catalyst failure modes for these industrial catalysts. Careful interpretation of the microscopy results enabled the identification of characteristic fingerprints of the failure mechanism. The presence of organic chloride impurities in the feed in combination with a reducing atmosphere accelerated both the sintering of ZnO and deformation of the catalyst pills. This reduced the effective lifespan of the catalyst, as the decrease in particle void fractions led to an increased reactor pressure drop, eventually necessitating the reloading of the reactor with a fresh catalyst. Understanding these mechanisms at both micro and macro scales is crucial for improving the economics and sustainability of commercial operations.</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 1055-1060"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Partial framework-Al in lamellar H-[Al]-RUB-18: acidity by probe TMPO adsorption and catalytic study in the presence and absence of water†","authors":"Paulla B. F. Sousa ,&nbsp;Elise M. Albuquerque ,&nbsp;Marco A. Fraga ,&nbsp;Heloise O. Pastore","doi":"10.1039/d4cy01288g","DOIUrl":"10.1039/d4cy01288g","url":null,"abstract":"<div><div>While framework-Al (Al_Td) sites on [Al]-RUB-18 materials with Brønsted acidity were active in ethanol dehydration, the acidity of partial framework-Al sites (Al_Oh or aluminol sites) remains unknown. ³¹P-MAS-NMR of adsorbed trimethylphosphine oxide (TMPO) was used together with catalytic reactions, in the presence and absence of water, to elucidate the acidity features of aluminol sites on lamellar RUB-18. Herein, spectroscopic analysis indicates that the ³¹P signals arise from TMPO adsorbed on the lamella surface of RUB-18 (<em>δ</em>_³¹P = 40–49 ppm), silanol/aluminol sites (<em>δ</em>_³¹P = 49–56 ppm), and Brønsted acid sites (60–75 ppm). The crystallinity degree of the structure, Si/Al and Al_Td/Al_Oh molar ratios, and TMPO loadings, under wet and dry conditions, all lead to changes in ³¹P resonances. Two resonance signals at 64 ppm and 69 ppm were attributed to partial and complete framework-Al sites, respectively. A clear correlation between the adsorption capacity of the active sites and peak intensities in the BAS region proves the influence of water in the adsorption process. This study brings additional evidence that the (SiO₄)₄Al and (SiO₄)₃Al–(OH)(H₂O)₂ species played a crucial role in biomass-derivative conversion reactions. The simultaneous activity of Brønsted/Lewis acid sites was revealed, with the possibility of the (SiO₄)₃Al–(OH)(H₂O)₂ sites acting as LAS. The present study clarifies the acidity features of aluminol sites on lamellar [Al]-RUB-18 and brings attention to the evaluation of solid catalysts under aqueous-phase conditions.</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 1157-1173"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards superior efficiency of the CO2-derived Fischer–Tropsch synthesis process over iron-based metal–organic framework-derived multifunctional catalytic materials†","authors":"Shican Jiang ,&nbsp;Zuozheng Liu ,&nbsp;Abhishek Dutta Chowdhury","doi":"10.1039/d4cy01508h","DOIUrl":"10.1039/d4cy01508h","url":null,"abstract":"<div><div>The strategic implementation of carbon utilization technologies is crucial for combatting climate change. The success relies on storing captured CO₂ as high-volume, energy-dense synthetic fuels and chemicals. Herein, iron-based systems in the Fischer–Tropsch synthesis process have shown potential for higher efficiency. However, examples of producing fuel and aromatic-range C₅₊ heavy hydrocarbons are scarce. Given the enhanced significance of metal–organic framework-based materials in our decarbonization efforts, this project demonstrates the direct transformation of CO₂ into C₅₊ liquid paraffins, olefins, and aromatics—key chemical building blocks in the petrochemical industry. This work systematically investigated the catalytic impact of critical synthetic parameters, such as pyrolysis temperature and duration. Thinner carbon layers with more defects from higher pyrolysis temperatures or extended times improve gas diffusion to internal iron species, governing catalytic performance. The additional promotion of alkali metals and the construction of bifunctional catalytic systems combined with zeolite also alter the catalytic outcome.</div></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"15 4","pages":"Pages 1096-1112"},"PeriodicalIF":4.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}