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601篇 您的检索式:关键字=electrocatalysis
    题名 作者 年代 出处 被引量
1Nanostructured energy materials for electrochemical energy conversion and storage: A review显示文摘Nanostructured materials have received tremendous interest due to their unique mechanical/electrical properties and overall behavior contributed by the complex synergy of bulk and interfacial properties for efficient and effective energy conversion and storage. The booming development of nanotechnology affords emerging but effective tools in designing advanced energy material. We reviewed the significant progress and dominated nanostructured energy materials in electrochemical energy conversion and storage devices, including lithium ion batteries, lithium–sulfur batteries, lithium–oxygen batteries, lithium metal batteries, and supercapacitors. The use of nanostructured electrocatalyst for effective electrocatalysis in oxygen reduction and oxygen evolution reactions for fuel cells and metal–air batteries was also included. The challenges in the undesirable side reactions between electrolytes and electrode due to high electrode/electrolyte contact area, low volumetric energy density of electrode owing to low tap density,and uniform production of complex energy materials in working devices should be overcome to fully demonstrate the advanced energy nanostructures for electrochemical energy conversion and storage. The energy chemistry at the interfaces of nanostructured electrode/electrolyte is highly expected to guide the rational design and full demonstration of energy materials in a working device.Xueqiang Zhang Xinbing Cheng Qiang Zhang 2016Journal of Energy Chemistry2016,25,6:35
2Porphyrin-like Fe-N4 sites with sulfur adjustment on hierarchical porous carbon for different rate-determining steps in oxygen reduction reaction显示文摘We developed a strategy based on coordination polymer to synthesize singleatom site Fe/N and S-codoped hierarchical porous carbon (Fe1/N,S-PC).The as-obtained Fe1/N,S-PC exhibited superior oxygen reduction reaction (ORR) performance with a half-wave potential (Ev2,0.904 V vs.RHE) that was better than that of commercial Pt/C (E1/2,0.86 V vs.RHE),single-atom site Fe/N-doped hierarchical porous carbon (Fe1/N-PC) without S-doped (E1/2,0.85 V vs.RHE),and many other nonprecious metal catalysts in alkaline medium.Moreover,the Fe1/N,S-PC revealed high methanol tolerance and firm stability.The excellent electrocatalytic activity of Fe1/N,S-PC is attributed to the synergistic effects from the atomically dispersed porphyrin-like Fe-N4 active sites,the heteroatom codoping (N and S),and the hierarchical porous structure in the carbon materials.The calculation based on density functional theory further indicates that the catalytic performance of Fe1/N,S-PC is better than that of Fe1/N-PC owing to the sulfur doping that yielded different rate-determining steps.Konglin Wu Xin Chen Shoujie Liu Yuan Pan Weng-Chon Cheong Wei Zhu Xing Cao Rongan Shen Wenxing Chen Jun LUO Wensheng Yan Lirong Zheng Zheng Chen Dingsheng Wang Qing Peng Chen Chen Yadong Li 2018Nano Research2018,11,12:18
3CO_(2) utilization: Developments in conversion processes显示文摘Carbon dioxide capture,utilization and storage(CCUS)eincluding conversion to valuable chemicals-is a challenging contemporary issue having multi-facets.The prospect to utilize carbon dioxide(CO_(2))as a feedstock for synthetic applications in chemical and fuel industries-through carboxylation and reduction reactions-is the subject of this review.Current statute of the heterogeneously catalyzed hydrogenation,as well as the photocatalytic and electrocatalytic activations of conversion of CO_(2) to value-added chemicals is overviewed.Envisaging CO_(2) as a viable alternative to natural gas and oil as carbon resource for the chemical supply chain,three stages of development;namely,(i)existing mature technologies(such as urea production),(ii)emerging technologies(such as formic acid or other single carbon(C1)chemicals manufacture)and(iii)innovative explorations(such as electrocatalytic ethylene production)have been identified and highlighted.A unique aspect of this review is the exploitations of reactions of CO2 ewhich stems from existing petrochemical plants-with the commodity petrochemicals(such as,methanol,ethylene and ethylene oxide)produced at the same or nearby complex in order to obtain value-added products while contributing also to CO_(2) fixation simultaneously.Exemplifying worldwide ethylene oxide facilities,it is recognized that they produce about 3 million tons of CO2 annually.Such a CO_(2) resource,which is already separated in pure form as a requirement of the process,should best be converted to a value-added chemical there avoiding current practice of discharging to the atmosphere.The potential utilization of CO_(2),captured at power plants,should also been taken into consideration for sustainability.This CO_(2) source,which is potentially a raw material for the chemical industry,will be available at sufficient quality and at gigantic quantity upon realization of on-going tangible capture projects.Products resulting from carboxylation reactions are obvious conversions.In addition,provided that enough supply of energy from non-fossil resources,such as solar[1],is ensured,CO_(2) reduction reactions can produce several valuable commodity chemicals including multi-carbon compounds,such as ethylene and acrylic acid,in addition to C1 chemicals and polymers.Presently,there are only few developing technologies which can find industrial applications.Therefore,there is a need for concerted research in order to assess the viability of these promising exploratory technologies rationally.Erdogan Alper Ozge Yuksel 2017Petroleum2017,3,1:13
4Multiscale carbon foam confining single iron atoms for efficient electrocatalytic CO2 reduction to CO显示文摘Electrocatalytic CO2 reduction to CO is a sustainable process for energy conversion.However,this process is still hindered by the diffusi limited mass transfer,low electrical conductivity and catalytic activity.Therefore,new strategies for catalyst design should be adopted to solve these problems and improve the electrocatalytic performa nee for CO production.Herein,we report a multiscale carb on foam confining〔single iron atoms prepared with the assistant of S1O2 template.The pore-enriched environment at the macro-scale facilitates the diffusion of reacta nts and products.The graphe ne nano sheets at the nano-scale promote the charge tran sfer duri ng the reaction.The single iron atoms con fined in carb on matrix at the atomic-scale provide the active sites for electrocatalytic CO2 reductio n to CO.The optimized catalyst achieves a CO Faradaic efficiency of 94.9%at a moderate potential of-0.5 V vs.RHE.Furthermore,the performance can be maintained over 60 hours due to the stable single iron atoms coordi nated with four n itroge n atoms in the carb on matrix.This work provides a promising strategy to improve both the activity and stability of single atom catalysts for electrocatalytic CO2 reduction to CO.Zheng Zhang Chao Ma Yunchuan Tu Rui Si Jie Wei Shuhong Zhang Zhen Wang Jian-Feng Li Ye Wang Dehui Deng 2019Nano Research2019,12,9:11
5Recent progress in structural modulation of metal nanomaterials for electrocatalytic CO_(2) reduction显示文摘The electrochemical CO_(2) reduction(ECR)into value-added products presents an appealing approach to mitigate CO_(2) emission caused by excess consumption of fossil fuels.To obtain high catalytic activity and selectivity toward target product in ECR,designing and developing a stable and efficient electrocatalyst is of significant importance.To date,metal nanomaterials have been widely applied as electrocatalysts for ECR due to their unique physicochemical properties.The structural modulation of metal nanomaterials is an attractive strategy to improve the catalytic performance.In this review,the recent progress of structural modulation,including size,facet,grain boundary,composition,interface,ligand modification,and crystal phase,is systematically summarized from both theoretical and experimental aspects.Finally,the opportunities and perspectives of structural modulation of metal nanomaterials for ECR are proposed.Chen-Huai Yang Farhat Nosheen Zhi-Cheng Zhang 2021Rare Metals2021,40,6:11
6Heterogeneous molecular catalysts for electrocatalytic CO2 reduction显示文摘This review provides an overview of the literature regarding heterogeneous molecular catalysts for electrochemical CO2 reduction (ECR).Fundamental aspects of the science,including aggregation,electrochemical rate laws,and electrode-catalyst electronic coupling,are discussed to provide a solid foundation on which to design experiments and interpret results.Mechanistic aspects of ECR are presented based on electrokinetic and spectroscopic measurements as well as density functional theory (DFT) calculations.Consensus is improving for electrokinetic measurements,but the redox state of the metal center under reaction conditions and DFT reaction pathways lack agreement in the literature.Concerning the tunable aspects of the molecular catalyst,the impacts of the metal center,ligand substituents,and electrode support on the activity and selectivity toward ECR are presented with an emphasis on those studies that controlled for aggregation and minimized mass-transport limitations.Extended three-dimensional (3D) structures such as polymers,metal-organic frameworks (MOFs),and covalent-organic frameworks (COFs) are discussed as highly tunable architectures that begin to mimic the catalytic pockets of enzyme active sites.To achieve the full potential of these catalysts,design principles must emerge based on a combination of deconvoluting measurements to extract intrinsic catalyst properties and more reliable theoretical calculations to predict reaction pathways.Nathan Corbin Joy Zeng Kindle Williams Karthish Manthiram 2019Nano Research2019,12,9:10
7Interfacial structure design of MXene-based nanomaterials for electrochemical energy storage and conversion显示文摘2D transition metal carbides,carbonitrides,and nitrides known as MXenes possess high electrical conductivity,large redox active surface area,rich surface chemistry,and tunable structures.Benefiting from these exceptional chemical and physical properties,the applications of MXenes for electrochemical energy storage and conversion have attracted increasing research interests around the world.Notably,the electrochemical performances of MXenes are directly dependent on their synthesis conditions,interfacial chemistries and structural configurations.In this review,we summarize the synthesis techniques of MXenes,as well as the recent advances in the interfacial structure design of MXene-based nanomaterials for electrochemical energy storage and conversion applications.Additionally,we provide an in-depth discussion on the relationship between interfacial structure and electrochemical performance from the perspectives of energy storage and electrocatalysis mechanisms.Finally,the challenges and insights for the future research of interfacial structure design of MXenes are outlined.Jianmin Luo Edward Matios Huan Wang Xinyong Tao Weiyang Li 2020InfoMat2020,2,6:10
8Fabrication of NiFe layered double hydroxide with well-defined laminar superstructure as highly efficient oxygen evolution electrocatalysts显示文摘Structure-activity relationship (SAR) is the key problem of nanoscience,thus to fabricate novel and well-defined nanostructure will provide a new insight on catalyst preparation method.Highly active and low cost electrocatalysts for oxygen evolution reaction (OER) are of great importance for future renewable energy conversion and storage.Herein,NiFe-based layered double hydroxides with laminar structure (NFLS) were successfully fabricated via a one-step hydrothermal approach by using sodium dodecyl sulfate as surfactant.The as-fabricated NFLS showed a well-defined periodic layered-stacking geometry with a scale down to 1-nm.Benefitting from the unique structure,NFLS exhibited an excellent catalytic activity towards OER with current densities of 10 mA·cm^-2 at overpotential of 197 mV.The synergistic effect of Ni and Fe plays a key role in electrode reactions.The present work provides a new insight to improve the OER performance by rational design of electrocatalysts with unique structures.Hao Zhang Haoyi Li Bilal Akram Xun Wang 2019Nano Research2019,12,6:10
9Oxygen vacancy enhancing mechanism of nitrogen reduction reaction property in Ru/TiO2显示文摘To search the new effective nitrogen reduction reaction(NRR)electrocatalyst is very important for the ammonia-based industry.Herein,we reported the design of a novel NRR electrocatalyst with Ru NPs loaded on oxygen-vacancy TiO2(Ru/TiO2-Vo).Structural characterizations revealed that oxygen vacancy was loaded in the matrix of Ru/TiO2-Vo.Electrocatalytic results indicated that Ru/TiO2-Vo showed good NRR performance(2.11μg h^-1 cm^-2).Contrast tests showed that NRR property of Ru/TiO2-Vo was much better than those of Ru/TiO-12(B)(0.53μg hcm^-2)and Ru/P25(0.42μg h^-1 cm^-2).Furthermore,density functional theory calculation results indicated catalytic mechanism of NRR and rate-determining step(*N2+1/2 H2→*N+*NH)was the potential-determining step with the overpotential requirement of 0.21 V.A combination of electronic structure analysis and catalytic measurement shed light on the synergistic effect of Ru and oxygen vacancy on the NRR performance.Shan Cheng Yi-Jing Gao Yi-Long Yan Xu Gao Shao-Hua Zhang Gui-Lin Zhuang Sheng-Wei Deng Zhong-Zhe Wei Xing Zhong Jian-Guo Wang 2019Journal of Energy Chemistry2019,28,12:10
10Rational design of three-phase interfaces for electrocatalysis显示文摘Gas-involving electrochemical reactions,like oxygen reduction reaction (ORR),oxygen evolution reaction (OER),and hydrogen evolution reaction (HER),are critical processes for energy-saving,environment-friendly energy conversion and storage technologies which gain increasing attention.The development of according electrocatalysts is key to boost their electrocatalytic performances.Dramatic efforts have been put into the development of advanced electrocatalysts to overcome sluggish kinetics.On the other hand,the electrode interfaces-architecture construction plays an equally important role for practical applications because these imperative electrode reactions generally proceed at triple-phase interfaces of gas,liquid electrolyte,and solid electrocatalyst.A desirable architecture should facilitate the complicate reactions occur at the triple-phase interfaces,which including mass diffusion,surface reaction and electron transfer.In this review,we will summarize some design principles and synthetic strategies for optimizing triple-phase interfaces of gas-involving electrocatalysis systematically,based on the electrode reaction process at the three-phase interfaces.It can be divided into three main optimization directions:exposure of active sites,promotion of mass diffusion and acceleration of electron transfer.Furthermore,we especially highlight several remarkable works with comprehensive optimization about specific energy conversion devices,including metal-air batteries,fuel cells,and water-splitting devices are demonstrated with superb efficiency.In the last section,the perspectives and challenges in the future are proposed.Yuqing Wang Yuqin Zou Li Tao Yanyong Wang Gen Huang Shiqian Du Shuangyin Wang 2019Nano Research2019,12,9:10
11Electrochemical synthesis of nitric acid from air and ammonia through waste utilization显示文摘Commercial nitric acid(HNO3) and ammonia(NH3) are mostly produced through the Ostwald process and the Haber-Bosch process, respectively. However, high energy demand and enormous greenhouse gas accompy these processes. The development of economical and green ways to synthesize HNO3 and NH3 is highly desirable for solving the global energy and environmental crisis. Here, we present two energy-efficient and environmentally friendly strategies to synthesize HNO3 and NH3 at distributed sources, including the electrocatalytic oxidation of N2 in air to HNO3 and the electrocatalytic reduction of residual NO3- contamination in water to NH3. The isotope-labeling studies combined with theoretical calculation reveal the reaction path of the two proposed strategies, confirming the origin of the electrochemical products. Importantly, the electrooxidation-generated NO3- ions may also serve as reactants for the electroreduction synthesis of NH3 in the future. Our work may open avenues for energy-efficient and green production of HNO3 and NH3 at distributed sources.Yuting Wang Yifu Yu Ranran Jia Chao Zhang Bin Zhang 2019National Science Review2019,6,4:10
12Creation of Triple Hierarchical Micro-Meso-Macroporous N-doped Carbon Shells with Hollow Cores Toward the Electrocatalytic Oxygen Reduction Reaction显示文摘A series of triple hierarchical micro-mesomacroporous N-doped carbon shells with hollow cores have been successfully prepared via etching N-doped hollow carbon spheres with CO_2 at high temperatures.The surface areas, total pore volumes and microporepercentages of the CO_2-activated samples evidently increase with increasing activation temperature from 800 to950 °C, while the N contents show a contrary trend from7.6 to 3.8 at%. The pyridinic and graphitic nitrogen groups are dominant among various N-containing groups in the samples. The 950 °C-activated sample(CANHCS-950) has the largest surface area(2072 m^2 g^(-1)), pore volume(1.96 cm^3 g^(-1)), hierarchical micro-mesopore distributions(1.2, 2.6 and 6.2 nm), hollow macropore cores(*91 nm)and highest relative content of pyridinic and graphitic N groups. This triple micro-meso-macropore system could synergistically enhance the activity because macropores could store up the reactant, mesopores could reduce the transport resistance of the reactants to the active sites, and micropores could be in favor of the accumulation of ions.Therefore, the CANHCS-950 with optimized structure shows the optimal and comparable oxygen reduction reaction(ORR) activity but superior methanol tolerance and long-term durability to commercial Pt/C with a 4 e--dominant transfer pathway in alkaline media. These excellent properties in combination with good stability and recyclability make CANHCSs among the most promising metal-free ORR electrocatalysts reported so far in practical applications.Ruohao Xing Tingsheng Zhou Yao Zhou Ruguang Ma Qian Liu Jun Luo Jiacheng Wang 2018Nano-Micro Letters2018,10,1:9
13High-temperature electrocatalysis and key materials in solid oxide electrolysis cells显示文摘Solid oxide electrolysis cells(SOECs)can convert electricity to chemicals with high efficiency at ~600-900℃,and have attracted widespread attention in renewable energy conversion and storage.SOECs operate in the inverse mode of solid oxide fuel cells(SOFCs)and therefore inherit most of the advantages of SOFC materials and energy conversion processes.However,the external bias that drives the electrochemical process will strongly change the chemical environments in both in the cathode and anode,therefore necessitating careful reconsideration of key materials and electrocatalysis processes.More importantly,SOECs provide a unique advantage of electrothermal catalysis,especially in converting stable low-carbon alkanes such as methane to ethylene with high selectivity.Here,we review the state-of-the-art of SOEC research progress in electrothermal catalysis and key materials and provide a future perspective.Lingting Ye Kui Xie 2021Journal of Energy Chemistry2021,30,3:9
14Pushing the activity of CO2 electroreduction by system engineering显示文摘As a promising technology that may solve global environmental challenges and enable intermittent renewable energy storage as well as zero-carbon-emission energy cycling, the carbon dioxide reduction reaction has been extensively studied in the past several years. Beyond the fruitful progresses and innovations in catalysts, the system engineering-based research on the full carbon dioxide reduction reaction is urgently needed toward the industrial application. In this review, we summarize and discuss recent works on the innovations in the reactor architectures and optimizations based on system engineering in carbon dioxide reduction reaction. Some challenges and future trends in this field are further discussed, especially on the system engineering factors.Hao Shen Zhengxiang Gu Gengfeng Zheng 2019Science Bulletin2019,64,24:9
15Advances in efficient electrocatalysts based on layered double hydroxides and their derivatives显示文摘The explore and development of electrocatalysts have gained significant attention due to their indispensable status in energy storage and conversion systems, such as fuel cells, metal–air batteries and solar water splitting cells. Layered double hydroxides(LDHs) and their derivatives(e.g., transition metal alloys, oxides, sulfides, nitrides and phosphides) have been adopted as catalysts for various electrochemical reactions, such as oxygen reduction, oxygen evolution, hydrogen evolution, and CO_2 reduction, which show excellent activity and remarkable durability in electrocatalytic process. In this review, the synthesis strategies, structural characters and electrochemical performances for the LDHs and their derivatives are described. In addition, we also discussed the effect of electronic and geometry structures to their electrocatalytic activity. The further development of high-performance electrocatalysts based on LDHs and their derivatives is covered by both a short summary and future outlook from the viewpoint of the material design and practical application.Lei Zhou Mingfei Shao Min Wei Xue Duan 2017Journal of Energy Chemistry2017,26,6:9
16原位形成的In/In2O3-x异质结:In2O3用于CO2电还原生成甲酸的活性物种显示文摘揭示反应条件下催化材料的结构转化与活性物种是理解构效关系和设计高效电催化剂的关键.本文发现结晶性的In2O3在CO2电还原的条件下会原位生成由结晶性In和非晶In2O3-x组成的In/In2O3-x异质结,并作为催化二氧化碳还原反应的活性物种.该异质结电还原CO2生成甲酸的法拉弟效率为89.2%,高于纯In的67.5%.实验表征和理论计算结果表明,In/In2O3-x表现出高活性的原因是肖特基效应导致的In的富电子状态提升了催化剂对于甲酸的选择性.此外,将阴极二氧化碳还原与阳极辛胺氧化反应耦合,不仅可以降低槽电压,还可以同时在两极分别获得甲酸和高附加值的辛腈.梁瑜 周伟 史艳梅 刘翠波 张兵 2020Science Bulletin2020,65,18:9
17Recent Advances in Interface Engineering for Electrocatalytic CO_(2) Reduction Reaction显示文摘Electrocatalytic CO_(2) reduction reaction(CO_(2) RR) can store and transform the intermittent renewable energy in the form of chemical energy for industrial production of chemicals and fuels,which can dramatically reduce CO_(2) emission and contribute to carbon-neutral cycle. E cient electrocatalytic reduction of chemically inert CO_(2) is challenging from thermodynamic and kinetic points of view. Therefore,low-cost,highly e cient,and readily available electrocatalysts have been the focus for promoting the conversion of CO_(2). Very recently,interface engineering has been considered as a highly e ective strategy to modulate the electrocatalytic performance through electronic and/or structural modulation,regulations of electron/proton/mass/intermediates,and the control of local reactant concentration,thereby achieving desirable reaction pathway,inhibiting competing hydrogen generation,breaking binding-energy scaling relations of intermediates,and promoting CO_(2) mass transfer. In this review,we aim to provide a comprehensive overview of current developments in interface engineering for CO_(2) RR from both a theoretical and experimental stand-point,involving interfaces between metal and metal,metal and metal oxide,metal and nonmetal,metal oxide and metal oxide,organic molecules and inorganic materials,electrode and electrolyte,molecular catalysts and electrode,etc. Finally,the opportunities and challenges of interface engineering for CO_(2) RR are proposed.Junjun Li Sulaiman Umar Abbas Haiqing Wang Zhicheng Zhang Wenping Hu 2021Nano-Micro Letters2021,13,12:9
18Revealing the hidden performance of metal phthalocyanines for CO2 reduction electrocatalysis by hybridization with carbon nanotubes显示文摘Metal phthalocyanines(MePcs)have been considered as promising catalysts for CO2 reduction electrocatalysis due to high turnover frequency and structural tunability.However,their performance is often limited by low current density and the performance of some systems is con troversial.Here,we report a carb on nano tube(CNT)hybridizati on approach to study the electrocatalytic performa nee of MePcs(Me=Co,Fe and Mn).MePc molecules are anchored on CNTs to form the hybrid materials without noticeable molecular aggregations.The MePc/CNT hybrids show higher activities and better stabilities than their molecular counterparts.FePc/CNT is slightly less active than CoPc/CNT,but it could deliver higher Faradaic efficiencies for CO production at low overpotentials.In contrast,the catalytic performance of MePc molecules directly loaded on substrate is hin dered by molecular aggregati on,especially for FePc and MnPc.Our results suggest that carbon nano tube hybridization is an efficient approach to construct advaneed MePc electrocatalysts and to understand their catalytic performance.Zhan Jiang Yang Wang Xiao Zhang Hongzhi Zheng Xiaojun Wang Yongye Liang 2019Nano Research2019,12,9:9
19Defect-rich MoS2 nanowall catalyst for efficient hydrogen evolution reaction显示文摘为氢进化反应设计有效 electrocatalysts (她的) 由于对干净精力的迫切要求吸引了实质的注意在不久的将来面对精力危机和随后的环境问题。在她的催化剂的大变化之中,铝二硫化物(瞬间 2) 由于它的丰富,低价格,高效率,和明确的催化机制被认为是最著名的催化剂。在这研究,有可控制的厚度的设计缺点的瞬间 2 nanowall (NW ) 催化剂被制作并且展出一显著地提高了她的表演。得益于高度暴露的活跃的边地点和不平的表面由柔韧的 NW 结构伴随了,有优化厚度的充满缺点的瞬间 2 NW 催化剂显示出 85 mV 的 ultralow 发作过电位, 310.6Junfeng Xie Haichao Qu Jianping Xin Xinxia Zhang Guanwei Cui Xiaodong Zhang Jian Bao Bo Tang Yi Xie 2017Nano Research2017,10,4:8
20Reduced graphene oxide-based materials for electrochemical energy conversion reactions显示文摘There have been ever-growing demands to develop advanced electrocatalysts for renewable energy conversion over the past decade.As a promising platform for advanced electrocatalysts,reduced graphene oxide(rGO)has attracted substantial research interests in a variety of electrochemical energy conversion reactions.Its versatile utility is mainly attributed to unique physical and chemical properties,such as high specific surface area,tunable electronic structure,and the feasibility of structural modification and functionalization.Here,a comprehensive discussion is provided upon recent advances in the material preparation,characterization,and the catalytic activity of rGO-based electrocatalysts for various electrochemical energy conversion reactions(water splitting,CO2 reduction reaction,N2 reduction reaction,and O2 reduction reaction).Major advantages of rGO and the related challenges for enhancing their catalytic performance are addressed.Seokhoon Choi Changyeon Kim Jun Min Suh Ho Won Jang 2019Carbon Energy2019,1,1:8
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