{"title":"KCl acts as a flux to assist the growth of sub-millimeter-scale metallic 2D non-layered molybdenum dioxide","authors":"Li-Ying Deng, Qing Zhang, Wang-Yang Li, Xiao-Yuan Ye, Yi-Fan Zhao, Shen-Zhong Chen, Yu-Lan Wang, Xing-Hui Wang, Hui-Peng Chen, Zhi-Yang Yu, Qun Yan, Shu-Ying Cheng, Tai-Liang Guo, Wen-Ping Hu, Feng Ding, Jie Sun","doi":"10.1007/s12598-024-02898-0","DOIUrl":"https://doi.org/10.1007/s12598-024-02898-0","url":null,"abstract":"<p>Two-dimensional (2D) metal oxides (2DMOs), such as MoO<sub>2</sub>, have made impressive strides in recent years, and their applicability in a number of fields such as electronic devices, optoelectronic devices and lasers has been demonstrated. However, 2DMOs present challenges in their synthesis using conventional methods due to their non-van der Waals nature. We report that KCl acts as a flux to prepare large-area 2DMOs with sub-millimeter scale. We systematically investigate the effects of temperature, homogeneous time and cooling rate on the products in the flux method, demonstrating that in this reaction a saturated homogenous solution is obtained upon the melting of the salt and precursor. Afterward, the cooling rate was adjusted to regulate the thickness of the target crystals, leading to the precipitation of 2D non-layered material from the supersaturated solution; by applying this method, the highly crystalline non-layered 2D MoO<sub>2</sub> flakes with so far the largest lateral size of up to sub-millimeter scale (~ 464 μm) were yielded. Electrical studies have revealed that the 2D MoO<sub>2</sub> features metallic properties, with an excellent sheet resistance as low as 99 Ω·square<sup>−1</sup> at room temperature, and exhibits a property of charge density wave in the measurement of resistivity as a function of temperature.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3><p>TOC (Table of Content)</p>\u0000","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 1","pages":""},"PeriodicalIF":8.8,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A cost-effective pyrrole additive for realizing highly stable Zn anode","authors":"Qian Wang, Bo-Hui Xu, Yi-Xun Du, Ling-Yao Kuang, Zhe-Shuai Lin, Xing-Xing Gu","doi":"10.1007/s12598-024-02927-y","DOIUrl":"https://doi.org/10.1007/s12598-024-02927-y","url":null,"abstract":"<p>In recent years, researchers have increasingly focused on aqueous rechargeable Zn-ion batteries (AZIBs) as a cost-effective and safe alternative to lithium-ion batteries for energy storage. Nevertheless, the limited reversibility of the Zn anode and the low coulombic efficiency of the electroplating process limit the application of AZIBs. In this work, pyrrole is employed as a cost-effective electrolyte additive for stabilizing the Zn anode for the first time. By altering the coordination environment of Zn (H<sub>2</sub>O)<sub>6</sub><sup>2+</sup>, chemical and hydrogen evolution corrosion was reduced, and a molecular interface layer was in-situ constructed on the surface of the metal Zn anode, thus effectively inhibiting the corrosion of Zn anode and the growth of dendrites. In addition, the molecular interface layer based on pyrrole can effectively regulate the uniform deposition of Zn ions and limit the 2D diffusion of Zn ions. Therefore, the electrochemical performance of the metal Zn anode is greatly improved in the pyrrole-based electrolyte. At the current density of 1 mA·cm<sup>−2</sup>, the stable cycle can exceed 1200 h, and the average Coulomb efficiency is as high as 99%. Moreover, the full battery can have more than 400 stable cycles with a reversible capacity 247.9 mAh·g<sup>−1</sup> at a current density 0.5 A·g<sup>−1</sup> when assembled with V<sub>2</sub>O<sub>5</sub> cathodes. This work provides a simple and feasible strategy for realizing the high performance of aqueous Zn-ion batteries.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"77 1","pages":""},"PeriodicalIF":8.8,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rare MetalsPub Date : 2024-08-05DOI: 10.1007/s12598-024-02925-0
Kun Chen, Yu-Rong Qin, Sheng-Qiu Liu, Rou-Ling Chen
{"title":"Remission of iron overload in adipose tissue of obese mice by fatty acid-modified polyoxovanadates","authors":"Kun Chen, Yu-Rong Qin, Sheng-Qiu Liu, Rou-Ling Chen","doi":"10.1007/s12598-024-02925-0","DOIUrl":"https://doi.org/10.1007/s12598-024-02925-0","url":null,"abstract":"<p>Iron overload has been evidenced to contribute to obesity-associated metabolic disorders, including insulin resistance. Strategies to reduce iron levels might help manage the metabolic complications associated with obesity. Here, it is demonstrated that the specific accumulation of oleic acid-modified polyoxovanadates (OPOVs) in adipose tissue leads to the reduction of iron concentrations in adipocytes in mice fed with a high-fat diet (HFD). Conjugation of oleic acids to polyoxovanadates enables tissue-specific depletion of iron from white adipose tissue (WAT) by OPOVs, protecting mice from HFD-induced obesity and obesity-associated metabolic deteriorations. Glucose tolerance and insulin sensitivity are improved in OPOV-treated mice, which demonstrates that the OPOV-induced iron depletion can reverse the metabolic degeneration caused by HFD-induced obesity. Furthermore, a decrease in expression of the marker genes of iron overload suggests the participation of OPOVs in maintaining iron homeostasis and a potential medical application of vanadium clusters in targeting the iron overload caused by obesity. These findings underscore the potential of vanadate-based clusters tailored to address the complex interplay between iron metabolism and metabolic health.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"120 1","pages":""},"PeriodicalIF":8.8,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rare MetalsPub Date : 2024-08-05DOI: 10.1007/s12598-024-02886-4
Ying-Gang Sun, Xin Du, Ji-Gang Wang, Qiang Liu, Jing-Lin Mu, Zhong-Fang Li, He-Qing Jiang, Li-Kai Wang
{"title":"Interface engineering of Co nanoparticles decorated by Ir confined in N-doped carbon nanotubes for flexible Zn–air batteries and pH-universal overall water splitting","authors":"Ying-Gang Sun, Xin Du, Ji-Gang Wang, Qiang Liu, Jing-Lin Mu, Zhong-Fang Li, He-Qing Jiang, Li-Kai Wang","doi":"10.1007/s12598-024-02886-4","DOIUrl":"10.1007/s12598-024-02886-4","url":null,"abstract":"<div><p>To alleviate the crisis of energy shortages, the scalable fabrication of highly efficient electrocatalysts is highly sought after for metal–air batteries and pH-universal overall water splitting. Hereby, an in situ construction to achieve Co@Ir nanoparticles in N-doped carbon nanotubes has been explored, which were directly fabricated by the pyrolysis and galvanic replacement. The interface engineering of Co@Ir core–shell structures could enhance interfacial and synergistic effects, achieving the tailorable electrocatalytic activities for oxygen reduction reaction, oxygen evolution reaction and hydrogen evolution reaction. Co@Ir-NT demonstrates the outstanding stability for overall water splitting under pH-universal conditions. Co@Ir-NT-based r-ZABs display a high power density of 295.1 mW·cm<sup>−2</sup> and a ultralong cycle stability over 2000 continuous charge–discharge cycles, and Co@Ir-NT-based F-ZABs maintain the similar performance at different bending angles, suggesting its promising potential in the application of wearable electronics. The corresponding theoretical calculations also indicate that Co@Ir core–shell structure could improve the adsorption capacity and facilitate the breakage of O–O band. Hence, this work might be helpful for developing multifunctional catalysts for metal–air batteries and water splitting under pH-universal conditions.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"43 12","pages":"6447 - 6459"},"PeriodicalIF":9.6,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electronic structure regulation of Fe-doped Ni2P nanocrystals towards durable electrocatalytic oxygen evolution","authors":"Ya Liu, Xing Cao, Jia-Jia Liu, Mei-Sheng Han, Gao-Wei Zhang, Yu-Bin Zhao, Huan-Hui Chen, Liang Yu, Jun-Rong Zeng, Zhi-Kai Cheng, Liu-Biao Zhong, Li-Juan Song, Ye-Jun Qiu","doi":"10.1007/s12598-024-02845-z","DOIUrl":"10.1007/s12598-024-02845-z","url":null,"abstract":"<div><p>The inherent electrocatalytic potential of transition metal phosphides (TMPs) for oxygen evolution is influenced by the reduced efficiency of electron transfer resulting from the interaction between electronegative phosphorus atoms and transition metals. Here, we introduce Fe into Ni<sub>2</sub>P nanocrystals by thermal injection synthesis method, and anchor them on nickel foam (NF) by facile spraying to prepare self-supporting oxygen evolution reaction (OER) electrocatalyst. Promisingly, the optimized electrode of Ni<sub>2</sub>P-Fe-2/NF demonstrates low overpotentials of 212 mV with 10 mA·cm<sup>−2</sup> and a 0.9% decay within 300 h test of 50 mA·cm<sup>−2</sup>. Notably, when electrode size was expanded to 600 cm<sup>2</sup> and applied to a larger electrolyzer, its 9 h decay rate at 6 A current was only 1.69%. Characterization results show that Fe doped NiOOH is generated during OER reaction as actual catalyst. Results from density functional theory (DFT) computations suggest that Fe doping shifts NiOOH d-band center to Fermi level, lowering critical *OOH intermediates formation energy barrier during the OER reaction. These findings inform the large-scale industrial application of TMPs as robust electrocatalysts.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"43 12","pages":"6405 - 6415"},"PeriodicalIF":9.6,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"In-situ fabrication of BiOCl/OVs–BiPO4 heterojunctions with enhanced photocatalytic destruction performance","authors":"Zheng-Dong Xu, Xing-Yun Jin, Jun-Bo Zhong, Min-Jiao Li, Shu-Lin Zhang","doi":"10.1007/s12598-024-02700-1","DOIUrl":"https://doi.org/10.1007/s12598-024-02700-1","url":null,"abstract":"<p>In this work, BiOCl/OVs–BiPO<sub>4</sub> heterojunction photocatalysts were successfully in-situ prepared by treating of BiPO<sub>4</sub> with dilute hydrochloric acid (HCl) under hydrothermal condition. Systematically characterization results confirm that BiOCl/BiPO<sub>4</sub> heterojunctions have been successfully in-situ constructed and oxygen vacancies (OVs) are significantly increased. The OVs on the surface of the BiOCl/OV<sub>S</sub>–BiPO<sub>4</sub> heterojunctions photocatalyst and the interface electric field at the interface of the heterojunctions effectively accelerate the separation and migration of photogenerated carriers, and the surface OVs provide more sites for adsorption and reaction. Consequently, BiOCl/OVs–BiPO<sub>4</sub> heterojunction photocatalysts have higher separation rate of photoexcited e<sup>−</sup>/h<sup>+</sup> pairs and exhibit ascendant photocatalytic degradation activity. Electron paramagnetic resonance (EPR) technology and free radical capture experiments give strong evidence that ·O<sub>2</sub><sup>−</sup> exists in the reaction system and is the leading species during the degradation process. The experimental results reveal that the degradation efficiency of rhodamine B (RhB) over BiPO<sub>4</sub> treated with 3 ml of 0.1% dilute hydrochloric acid (3HCl-BPO) is 2.42 times of that over the reference BiPO<sub>4</sub>. After ultraviolet (UV) light illumination for 20 min, the destruction degree of RhB on the 3HCl-BPO sample reaches 99%. Moreover, the degradation rate of tetracycline (TC) is also obviously improved over 3HCl-BPO compared with that on the reference BiPO<sub>4</sub> after 40 min exposure to ultraviolet light. The excellent stability of the sample was demonstrated by five cycles. A reasonable enhancement mechanism for BiOCl/OVs–BiPO<sub>4</sub> heterojunctions was proposed to elucidate the boosted photocatalytic performance. This work offers a facile and reliable reference to design high performance BiPO<sub>4</sub>-based photocatalysts for environment purification.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"48 1","pages":""},"PeriodicalIF":8.8,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141936224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rare MetalsPub Date : 2024-08-03DOI: 10.1007/s12598-024-02891-7
Jing-Ting Yang, Tao Xu, Pan-Di Lv, Yue Su, Jing Xie, Zhen-Xing Li, Huan Zhou, Peng-Peng Chen
{"title":"Ni3S2@MoS2 nano-arrays with Mo atomic site as efficient photoanode materials for photoelectrocatalytic inactivation of antibiotic-resistance bacteria and degradation of antibiotic-resistance gene","authors":"Jing-Ting Yang, Tao Xu, Pan-Di Lv, Yue Su, Jing Xie, Zhen-Xing Li, Huan Zhou, Peng-Peng Chen","doi":"10.1007/s12598-024-02891-7","DOIUrl":"https://doi.org/10.1007/s12598-024-02891-7","url":null,"abstract":"<p>In this paper, hierarchical ultra-thin core/shell Ni<sub>3</sub>S<sub>2</sub>@MoS<sub>2</sub> nano-arrays with Mo atomic site grown on nickel foam (Ni<sub>3</sub>S<sub>2</sub>@MoS<sub>2</sub>-NF) were designed and synthesized through the hydrothermal method. When they are tested as photoelectric catalysis electrodes to anti-bacteria, the Ni<sub>3</sub>S<sub>2</sub>@MoS<sub>2</sub> within core/shell structure exhibits about several times higher rate capability and outstanding cycling stability than traditional photocatalysts. After reacting with water and oxygen, large numbers of extracellular reactive oxygen species on the surface of Ni<sub>3</sub>S<sub>2</sub>@MoS<sub>2</sub> are observed. These reactive oxygen species can penetrate bacterial cells, resulting in a rapid rise of intracellular reactive oxygen species in a short time. The integrity of the bacterial cell membrane is also destroyed, which can be observed in both scanning and transmission images. The synthetic primer was used to specifically label the gene fragment with antibiotic resistance, which was oxidized and eliminated after the photoelectron catalysis (PEC) reaction, proving that this material for PEC antibacterial can not only kill bacteria. Successful elimination of antibiotic-resistance gene fragments can also be achieved.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"16 1","pages":""},"PeriodicalIF":8.8,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141881171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ce-doped defective titanium oxide coating with antibacterial, antioxidant and anti-inflammatory properties for potential application of peri-implantitis treatment","authors":"Yun-Hao Chen, Shi-Wei Guan, Min Xing, Kelvin Wai-Kwok Yeung, Xuan-Yong Liu, Wen-Hao Qian, Jing-Bo Yin, Jia-Jun Qiu","doi":"10.1007/s12598-024-02935-y","DOIUrl":"https://doi.org/10.1007/s12598-024-02935-y","url":null,"abstract":"<p>Implant-related infections and tissue inflammation are the main factors for peri-implantitis. Lack of antibacterial activity and poor soft tissue sealing property increase the occurrence probability of peri-implantitis. To prevent and treat peri-implantitis, cerium-doped defective titanium oxide coatings are prepared on medical titanium surfaces by plasma electrolytic oxidation and thermal reduction treatment. In the darkness, Ce-doped defective titanium oxide coatings with micro-porous structure surface can inhibit the bacteria adhesion to some extent with antibacterial rates of 38.0% against <i>S. aureus</i> and 65.0% against <i>E. coli</i>. Under near infrared (NIR) irradiation, Ce-doped defective titanium oxide coatings show good photothermal antibacterial activity with antibacterial rates of 99.9% against <i>S. aureus</i> and 99.9% against <i>E. coli</i>. Moreover, with the increasing content of Ce-doping, the coatings exhibit higher capacity to scavenge hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS<sup>·+</sup>). The coatings with enhanced antioxidant effect can protect human gingival fibroblasts from oxidative stress damage by eliminating reactive oxygen species and promoting initial cell adhesion. Besides, Ce-doped coatings can regulate the immune microenvironment by up-regulating the expression of anti-inflammatory genes and down-regulating the pro-inflammatory genes. In vivo animal experiments further confirm the good antibacterial activity of Ce-doped defective titanium oxide coatings under NIR irradiation and good biosafety. This work provides a novel surface modification strategy for implant abutment, which shows good application prospects for preventing and treating peri-implantitis.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"30 1","pages":""},"PeriodicalIF":8.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"NiCoFeCu medium-entropy alloy nanoparticles encapsulated in carbon nanotubes as catalysts for enhancing the hydrogen desorption of MgH2","authors":"Ya-Fei Liu, Yi-Ke Huang, Yu-Sang Guo, Meng-Yuan Yue, Hua-Xu Shao, Yi-Jing Wang","doi":"10.1007/s12598-024-02936-x","DOIUrl":"10.1007/s12598-024-02936-x","url":null,"abstract":"<div><p>Recently, high/medium-entropy alloys (HEAs/MEAs) have been considered attractive catalysts due to their unique physicochemical properties. However, the synthesis of nano-sized HEAs/MEAs catalysts with desirable morphology presents significant challenges. Herein, we report the synthesis of NiCoFeCu MEA nanoparticles encapsulated in nitrogen-doped carbon nanotubes (NCTs) via a straightforward one-step pyrolysis method. The unique structure of NiCoFeCu/NCTs and the nano-sized MEA catalysts contributes to the improved hydrogen desorption kinetics of MgH<sub>2</sub>. The onset dehydrogenation temperature of the MgH<sub>2</sub>-NiCoFeCu/NCTs composite decreased to 173.4 °C, a reduction of 117.4 °C compared to pure MgH<sub>2</sub>. The MgH<sub>2</sub>-NiCoFeCu/NCTs composite could release 6.50 wt% H<sub>2</sub> within 30 min at 325 °C. Furthermore, an activation energy of 116.3 kJ·mol<sup>−1</sup> for the MgH<sub>2</sub>-NiCoFeCu/NCTs composite has been obtained, much lower than pure milled MgH<sub>2</sub>, demonstrating an enhanced hydrogen desorption kinetics. Moreover, the exceptional dispersion capability of the carbon material contributes to outstanding cyclic stability without any loss of capacity even after 10 cycles of de/hydrogenation at 300 °C.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"43 11","pages":"5868 - 5879"},"PeriodicalIF":9.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}