Journal of Catalysis最新文献

{"title":"Atomic-scale iron catalyst for the reductive N-formylation of nitroarenes under mild conditions","authors":"Yi Hu ,&nbsp;Xiangzhu Yu ,&nbsp;Meng Miao,&nbsp;Chenlai Guo,&nbsp;Xueying Tang,&nbsp;Enshuang Bai,&nbsp;Yingyu Jiang,&nbsp;Lianyue Wang","doi":"10.1016/j.jcat.2026.116693","DOIUrl":"10.1016/j.jcat.2026.116693","url":null,"abstract":"<div><div>The development of a mild and efficient non-noble metal heterogeneous catalytic system to achieve the conversion of nitroaromatic compounds into high-value products is of great significance, but it remains a substantial challenge. In this study, we present a mild and efficient protocol for the selective <em>N</em>-formylation of nitroarenes over a nitrogen-doped mesoporous carbon-supported iron-based catalyst Fe-opd-900, which was prepared by the method of high-temperature pyrolysis with the sacrifice of the template agent. Various substrates were successfully converted into the desired target products in moderate to excellent yields utilizing versatile formic acid as both a renewable hydrogen carrier and C1 source under mild conditions. The robust catalyst Fe-opd-900 could be used continuously for 15 times without significant loss in catalytic activity. The existence of atomically dispersed iron centers was confirmed by the characterizations of XPS, aberration-corrected HAADF-STEM, XANES, and EXAFS. Characterization and active sites studies indicate that the nitrogen species and highly dispersed Fe-N_x are crucial for the efficient activation of formic acid and the enhancement of catalytic performance. Based on kinetic experiments and control experiments, a reasonable reaction mechanism was proposed.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"455 ","pages":"Article 116693"},"PeriodicalIF":6.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145993180","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":"Finite-temperature composition–activity maps reveal Cu-rich windows for CO2-to-CO reduction on Ag–Au–Cu–Pd–Pt high-entropy alloys","authors":"Ni Yi ,&nbsp;Qi Xiao ,&nbsp;Jilun Song,&nbsp;Shulin Wang,&nbsp;Yingru Wang,&nbsp;Liang Cao","doi":"10.1016/j.jcat.2026.116686","DOIUrl":"10.1016/j.jcat.2026.116686","url":null,"abstract":"<div><div>Rational design of multicomponent alloy electrocatalysts is complicated by vast composition space and finite-temperature surface disorder. Here we develop a multiscale framework that links surface thermodynamics to site-resolved energetics for Ag–Au–Cu–Pd–Pt high-entropy alloy (HEA) nanoparticles in CO₂-to-CO reduction. A cluster-expansion Hamiltonian combined with Metropolis Monte Carlo sampling captures temperature-dependent surface segregation and generates realistic equilibrium surface structures. A compact, strain-aware neural network trained on DFT *CO adsorption energies—using ligand, coordination, and strain descriptors—enables high-throughput prediction of adsorption energetics across diverse local environments. Coupled via a Sabatier-type volcano, these predictions yield composition–activity maps that reveal a robust Cu-rich activity window (75–85%). Representative formulations such as Cu_0.85Pt_0.15 and Ag_0.05Au_0.05Cu_0.8Pt_0.05Pd_0.05 exhibit up to ∼5-fold and ∼10-fold higher activity than Cu(111) and equimolar HEAs, respectively, after annealing at 1500 K. DFT-validated analysis identifies a transferable local motif—Cu-atop sites embedded in Cu-enriched first- and second-neighbor shells—that tunes *CO binding toward the volcano optimum and rationalizes the Cu-rich activity ridges. Treating “high entropy” as a design strategy rather than a strict composition rule provides experimentally accessible composition windows and annealing conditions, as well as a reusable workflow for optimizing multicomponent alloy electrocatalysts.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"455 ","pages":"Article 116686"},"PeriodicalIF":6.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924008","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":"α-Diimine cobalt complexes bearing axial anagostic interaction: a system for accessing ultra-high molecular weight polybutadiene","authors":"Haidong Zhang ,&nbsp;Xin Wang ,&nbsp;Feng Wang ,&nbsp;Xiaohua Wang ,&nbsp;Lishuang Ma ,&nbsp;Xuequan Zhang ,&nbsp;Heng Liu","doi":"10.1016/j.jcat.2026.116676","DOIUrl":"10.1016/j.jcat.2026.116676","url":null,"abstract":"<div><div><em>cis</em>-1,4-Polybutadiene (PBd) with ultra-high molecular weight typically exhibits significantly enhanced mechanical properties, including tear resistance, durability, and tensile strength, etc. Nevertheless, due to inevitable chain transfer reactions during polymerization, achieving such polymers currently remains a major challenge. In this work, we designed a series of <em>α</em>-diimine cobalt complexes featuring axial Co⋯H–C anagostic interactions. When being employed for butadiene polymerization, these complexes not only demonstrated high catalytic activity and excellent <em>cis</em>-1,4-selectivity, but also significantly suppressed chain transfer reactions, enabling the production of polybutadienes with ultra-high molecular weight, markedly exceeding those obtained from cobalt counterparts lacking such interactions.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"455 ","pages":"Article 116676"},"PeriodicalIF":6.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145908154","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":"In-suit growth of MOFs on COFs: Construction of an effective bifunctional hybrid photocatalyst with accelerated electron transfer","authors":"Han Wang ,&nbsp;Yaopeng Xiao ,&nbsp;Hanbo Yu ,&nbsp;Hong Qin ,&nbsp;Ziwei Wang ,&nbsp;Guangming Zeng ,&nbsp;Piao Xu","doi":"10.1016/j.jcat.2026.116696","DOIUrl":"10.1016/j.jcat.2026.116696","url":null,"abstract":"<div><div>Exploring heterojunction photocatalysts with multi-functionalities is of great importance for clean energy production and environmental remediation. Herein, a new type of step (S)-scheme heterojunction photocatalyst based on metal–organic frameworks (MOFs, NH₂-UIO-66) and covalent organic frameworks (COFs, TpMa) was developed by in-suit synthesis. Experimental data along with the density functional theory calculation confirmed the formation of internal electric field (IEF) directing from TpMa to NH₂-UIO-66 upon hybridization. The S-scheme charge transfer path enables the enhancement of surface charge transfer efficiency as well as the prolongation of injected electron lifetime, thereby constraining the recombination rate of charge carriers. As a result, the optimized hybrid shows a robust H₂O₂ evolution of 23.04 mM h⁻¹ g⁻¹ with an apparent quantum efficiency of 4.15 % at 420 nm, and 83.4 % degradation of tetracycline in a 60 min reaction time, which far exceeded those of pristine NH₂-UIO-66. This study opens up a new avenue for the construction of MOF-COF heterojunctions with promising applications.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"455 ","pages":"Article 116696"},"PeriodicalIF":6.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995797","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":"Synergistic catalysis of oxygen vacancy-Cu0 dual-active-site derived from Cu-Zn mineral salt for boosting ethanol dehydrogenation into acetaldehyde","authors":"Qingwei Meng ,&nbsp;Hui Luo ,&nbsp;Fucheng Chen ,&nbsp;Lungang Chen ,&nbsp;Jinliang Song ,&nbsp;Xiaorui Du ,&nbsp;Yiyuan Zhou ,&nbsp;Anqi Wang ,&nbsp;Xiaoping Wu ,&nbsp;Tiejun Wang","doi":"10.1016/j.jcat.2026.116670","DOIUrl":"10.1016/j.jcat.2026.116670","url":null,"abstract":"<div><div>The non-oxidative dehydrogenation of ethanol (EDH) to acetaldehyde represents a promising route for biomass resource utilization. Although Cu/ZnO catalysts are widely employed industrially, their application in EDH remains underexplored. This study investigates the impact of precursor composition—using aurichalcite, zinc malachite, and their mixtures—on the structure and EDH performance of derived Cu/ZnO catalysts. The precursor composition significantly modulates the oxygen vacancy concentration in the catalysts, thereby tuning electronic metal-support (Cu-ZnO) interactions and the relative abundances of Cu⁰ and defective Zn^δ+ species. The aurichalcite-derived catalyst exhibits the smallest Cu particle size, highest oxygen vacancy and Cu⁰ content, facilitating the formation of abundant oxygen vacancy-Cu⁰ dual-active-sites at the Cu-ZnO interface. In situ DRIFTS characterization demonstrate that oxygen vacancies play a critical role in the adsorption of ethanol, and the oxygen vacancy-Cu⁰ dual-active sites facilitate the cleavage of the α-C–H bond, thereby enhancing the rate of ethanol dehydrogenation. Mechanism studies reveal that the oxygen vacancy promotes adsorption via the ethanol C-O or O–H bond, while adjacent metallic Cu⁰&amp;Cu⁺ activates and cleaves the C–H and O–H bonds. This oxygen vacancy-metal dual-active-sites synergistically enhances the intrinsic activity for ethanol dehydrogenation. Furthermore, catalyst with lower acidity and basicity were found to favor acetaldehyde selectivity. The catalyst derived from the mixed-phase precursor demonstrated optimal performance, achieving 63 % ethanol conversion and 90.2 % acetaldehyde selectivity at 270 °C under a WHSV of 1 h⁻¹, with a catalyst lifetime exceeding 230 h. This work provides valuable insights for designing efficient Cu/ZnO catalysts for selective acetaldehyde production via ethanol dehydrogenation.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"455 ","pages":"Article 116670"},"PeriodicalIF":6.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145903489","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":"Pivotal strategies towards stable Ni-based catalysts for dry reforming of methane: resisting carbon accumulation","authors":"Shaoyuan Sun ,&nbsp;Dezheng Li ,&nbsp;Huimin Liu ,&nbsp;Chao Wang ,&nbsp;Manqi Zhao ,&nbsp;Heting Hou ,&nbsp;Yonghua Zhao ,&nbsp;Qijian Zhang ,&nbsp;Dehua He ,&nbsp;Yiming Lei","doi":"10.1016/j.jcat.2026.116671","DOIUrl":"10.1016/j.jcat.2026.116671","url":null,"abstract":"<div><div>Catalytic dry reforming of methane (DRM) can convert greenhouse gases (CO₂ and CH₄) into syngas (CO + H₂) so as to be expected to realize carbon neutrality and green energy production. Ni-based catalysts with low cost and high efficiency are promising for DRM field. However, the rapid cracking of CH₄ on Ni surface becomes a double-edged sword, resulting in high efficiency and undesired carbon accumulation. To improve the anti-carbon accumulation ability, the catalytic communities have proposed effective strategies, represented by i) regulation and stabilization of small metal nanoparticles, ii) regulation of the support improving oxidation of deposited carbon. Herein, we highlight their effects in enhancing anti-carbon accumulation ability and discuss their anti-carbon accumulation abilities under realistic DRM reaction conditions, aiming at inspiring more interesting studies toward DRM and even the whole catalytic field.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"455 ","pages":"Article 116671"},"PeriodicalIF":6.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145903491","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 chlorine evolution via silver-complex-mediated suppression of hydroxyl radicals on acid-resistant Fe2O3(Sn)/WO3 Z-scheme photoanodes","authors":"Xiaobing Shi ,&nbsp;Qianbao Wu ,&nbsp;Yu-Nan Yi ,&nbsp;Junshan Li","doi":"10.1016/j.jcat.2025.116633","DOIUrl":"10.1016/j.jcat.2025.116633","url":null,"abstract":"<div><div>Photoanodic chlorine evolution, as the anodic half-reaction for hydrogen production, enhances solar energy conversion while enabling sustainable Cl₂ synthesis. However, its practical application is hampered by the low Cl₂ Faradaic efficiency (FE) and the poor stability of photoanodes under the requisite harsh acidic conditions. <em>Here</em>, we report an Fe₂O₃(Sn)/WO₃ photoanode that achieves a Cl₂ FE of up to 96% upon the introduction of trace Ag⁺, compared with ∼ 60% without Ag⁺, while sustaining stable photocurrent for over 500 h at 1.5 V (RHE) in acidic simulated saline medium (0.5 M NaCl, pH = 1). Structural characterization reveals that the WO₃ overlayer forms a Z-scheme heterojunction with the Fe₂O₃(Sn), which not only enhances hole injection but also serves as an acid-resistant protective layer. In situ electron paramagnetic resonance (EPR) demonstrates that water oxidation to •OH radicals competes with the chlorine evolution reaction (Cl₂ER), whereas trace Ag⁺ preferentially directs hole transfer. Moreover, in situ Raman spectroscopy identifies [AgCl₂(Cl₂)]⁻ intermediates, verifying the Ag⁺-mediated pathway. This work expands the repertoire of strategies for achieving efficient and durable chloride oxidation, offering a robust pathway in challenging acidic saline media.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"454 ","pages":"Article 116633"},"PeriodicalIF":6.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145732152","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":"Synergistic regulation of charge dynamics and reaction pathways for selective photocatalytic NO oxidation to nitrate via oxygen vacancies and plasmonic Ag nanoparticles","authors":"Dengyu Jiao ,&nbsp;Peng Chen ,&nbsp;Xing’an Dong ,&nbsp;Jiazhen Liao ,&nbsp;Wenjie He ,&nbsp;Wendong Zhang","doi":"10.1016/j.jcat.2025.116650","DOIUrl":"10.1016/j.jcat.2025.116650","url":null,"abstract":"<div><div>Selective photocatalytic oxidation of NO to nitrate (NO₃^–), rather than toxic NO₂, remains highly challenging due to uncontrollable reaction intermediates and extremely low charge migration efficiency. Herein, we design a photocatalyst (BiSbO₄/AgCl-Ag-70) that integrates a BiSbO₄/AgCl heterojunction with spatially correlated Ag nanoparticles (NPs) and oxygen vacancies (OVs) to synergistically regulated charge dynamics and reaction pathways. The formation of a heterojunction establishes a built-in electric field, which facilitates directional electron transfer. Meanwhile, Ag NPs and abundant OVs induce localized electron redistribution, promoting the generation of reactive oxygen species (ROS), and enhancing the selectivity toward nitrate. The BiSbO₄/AgCl-Ag-70 photocatalyst immobilized on ceramic foam achieved 90.0 % NO removal efficiency with excellent stability, maintaining 79.0 % removal after 720 min, while generating only 22 ppb (4.2 %) of toxic NO₂. Furthermore, the BiSbO₄/AgCl-Ag-70 catalyst demonstrated a high nitrate selectivity of 89.2 %. Mechanistic studies combining <em>in situ</em> DRIFTS and DFT calculations reveal that the introduction of OVs activates O₂/H₂O molecules, thereby promoting a reactive oxygen species-dominated pathway for the conversion of NO to NO₃^–, rather than the route involving the formation of the toxic intermediate NO₂. This work provides a strategy for the selective removal of NO by designing a material with rapid interface charge transfer and abundant surface active sites, thereby achieving precise regulation of the photocatalytic oxidation pathways.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"454 ","pages":"Article 116650"},"PeriodicalIF":6.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145813457","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 photocatalytic active centers in covalent organic framework isomers via A/K-region positional isomerization of pyrene for H2O2 production","authors":"Yusen Li ,&nbsp;Xiaobin Hou ,&nbsp;Xitong Ren ,&nbsp;Yajie Tian ,&nbsp;Jiajie Sun ,&nbsp;Feng Bai","doi":"10.1016/j.jcat.2025.116607","DOIUrl":"10.1016/j.jcat.2025.116607","url":null,"abstract":"<div><div>The integration of dual active sites for concurrent oxygen reduction (ORR) and water oxidation (WOR) within a single covalent organic framework (COF) remains a fundamental challenge in the artificial photosynthesis of H₂O₂. To address this, we report a positional isomerization strategy that precisely engineers the substitution sites on a pyrene core, constructing four isomeric pyrene-based COFs (A-Py-COF, KA-Py-COF, AK-Py-COF, and K-Py-COF). Structure-activity studies reveal that K-region substitution is pivotal in activating the framework for efficient stepwise two-electron ORR and two-electron WOR. As a result, the optimized K-Py-COF achieves a remarkable photocatalytic H₂O₂ production rate of 468.3 μmol g^–1h⁻¹ in pure water without sacrificial agents, representing a 7.8-fold enhancement over its A-Py-COF analogue. In a biphasic water-benzyl alcohol system, the H₂O₂ production rate of K-Py-COF increases dramatically by 15.3 times, a performance that surpasses most state-of-the-art metal-free COF photocatalysts. By establishing a clear correlation between molecular isomerism and the localization of redox-active sites, this work provides a novel design principle for developing dual-channel COFs toward sustainable H₂O₂ synthesis.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"454 ","pages":"Article 116607"},"PeriodicalIF":6.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145651295","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":"Interlayer stacking modulation of flexible covalent organic frameworks for broad-spectrum-driven H2O2 production in seawater","authors":"Yiping Chen ,&nbsp;Xiangjing Xie ,&nbsp;Xiayi Hu ,&nbsp;Bei Long ,&nbsp;Guo-Jun Deng ,&nbsp;Ting Song","doi":"10.1016/j.jcat.2025.116639","DOIUrl":"10.1016/j.jcat.2025.116639","url":null,"abstract":"<div><div>Compared with rigid covalent organic frameworks (COFs), flexible COFs exhibit adaptive structural dynamics that help mitigate collapse risks in harsh environments. However, their conformational flexibility often leads to bonding misorientation during synthesis, and precise interlayer stacking regulation remains challenging. Herein, we develop an aldehyde-mediated exchange strategy to construct three flexible COFs with tailored stacking modes: AA stacking (Sq-Ben-COF) mediated by benzaldehyde, AB stacking via 2-thiophenecarboxaldehyde, and unspecified stacking. Using only visible light and without sacrificial agents in natural seawater, Sq-Ben-COF achieved a record H₂O₂ production rate, surpassing AB-stacked and unspecified counterparts. Notably, Sq-Ben-COF also demonstrates photocatalytic H₂O₂ production activity under near-infrared light irradiation. Remarkably, all three COFs exhibited approximately 2-fold higher activity in seawater than in freshwater systems. Mechanistic insights reveal that AA stacking facilitates directional photoexcited electron migration, while optimized interlayer stacking enhances proton transport and active-site accessibility. This work establishes aldehyde exchange as a dual-functional approach to engineer ordered flexible COFs and regulate stacking modes, advancing their applications in energy and catalysis.</div></div>","PeriodicalId":346,"journal":{"name":"Journal of Catalysis","volume":"454 ","pages":"Article 116639"},"PeriodicalIF":6.5,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145760418","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}