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11篇 您的检索式:作者名="Ruohan Chen"
    题名 作者 年代 出处 被引量
1Low-strain TiP_(2)O_(7) withthree-dimensionalionchannelsas long-life and high-rate anode material for Mg-ion batteries显示文摘Rechargeable magnesium batteries are identified as a promising next-generation energy storage system,but their development is hindered by the anode−electrolyte−cathode incompatibilities and passivation of magnesium metal anode.To avoid or alleviate these problems,the exploitation of alternative anode materials is a promising choice.Herein,we present titanium pyrophosphate(TiP_(2)O_(7))as anode materials for magnesium-ion batteries(MIBs)and investigate the effect of the crystal phase on its magnesium storage performance.Compared with the me-tastable layered TiP_(2)O_(7),the thermodynamically stable cubic TiP_(2)O_(7) displays a better rate capability of 72 mAh g^(−1) at 5000 mA g^(−1).Moreover,cubic TiP_(2)O_(7) exhibits excellent cycling stability with the capacity of 60 mAh g^(−1) after 5000 cycles at 1000 mA g^(−1),which are better than pre-viously reported Ti-based anode materials for MIBs.In situ X-ray diffraction technology confirms the single-phase magnesiumion inter-calation/deintercalation reaction mechanism of cubic TiP_(2)O_(7) with a low volume change of 3.2%.In addition,the density functional theory calcu-lation results demonstrate that three-dimensional magnesiumion diffu-sion can be allowed in cubic TiP_(2)O_(7) with a low migration energy barrier of 0.62 eV.Our work demonstrates the promise of TiP_(2)O_(7) as high-rate and long-life anode materials for MIBs and may pave the way for further development of MIBs.Fangyu Xiong Yalong Jiang Li Cheng Ruohan Yu Shuangshuang Tan Chen Tang Chunli Zuo Qinyou An Yunlong Zhao Jean-Jacques Gaumet Liqiang Mai 2022Interdisciplinary Materials2022,1,1:3
2Tunable Ru-Ru2P heterostructures with charge redistribution for efficient pH-universal hydrogen evolution显示文摘Designing synergistic heterogeneous catalytic interfaces is the key to developing highly compatible pH-universal electrocatalysts for complex chemical environments.Our theoretical calculation results demonstrate that the Ru-Ru2P heterointerface can not only promote the redistribution of charges,but also reduce the d-band center,and then enhances the adsorption capacity of the key intermediate.However,in situ and facile synthesis of Ru-Ru2P heterostructures is severely limited by thermodynamic obstacles.Herein,we propose a molten salt-assisted catalytic synthesis scheme,and successfully build a series of homologous metallic Ru-Ru2P heterostructure catalysts with different molar ratios of Ru to P under atmospheric pressure and low-temperature(400C).The resultant Ru-Ru2P with rich heterostructures show the Pt-like HER performance in different pH media.Particularly,it is prominent under alkaline conditions(18 mV@10 mA cm^(2)),which outperforms the Pt catalyst(37 mV@10 mA cm^(2)).Furthermore,Ru-Ru2P heterostructures also show certain potential in the electrolysis of seawater to produce hydrogen.This work represents a significant supplement of high-efficiency pH-universal HER catalysts,and provides a new light on interface engineering in energy technology fields and beyond.Ding Chen Ruohan Yu Ruihu Lu Zonghua Pu Pengyan Wang Jiawei Zhu Pengxia Ji Dulan Wu Jinsong Wu Yan Zhao Zongkui Kou Jun Yu Shichun Mu 2022InfoMat2022,4,5:2
3Structural architecture of Neoproterozoic rifting depression groups in the Tarim Basin and their formation dynamics显示文摘The Tarim Basin is the largest, oil-bearing, superimposed basin in the northwest of China. The evolution and tectonic properties of the initial Tarim Basin have been hotly disputed and remain enigmatic. The Neoproterozoic basin is covered by a vast desert and a huge-thickness of sedimentary strata, has experienced multiple tectonic movements, had a low signal to noise ratios(SNRs) of deep seismic reflection data, all of which have posed critical obstacles to research. We analysed four field outcrops, 18 wells distributed throughout the basin, 27 reprocessed seismic reflection profiles with higher SNRs across the basin and many ancillary local 2D and 3D profiles and aeromagnetic data. We found about 20 normal fault-controlled rifting depressions of the Cryogenian and Ediacaran scattered throughout the basin, which developed on the Precambrian metamorphic and crystalline basement. The structural framework is clearly different from that of the overlying Phanerozoic. The rifting depressions consist of mainly half grabens, symmetrical troughs and horst-grabens. From the northeast to southwest of the basin,they are divided into three rifting depression groups with the WNW, ENE, and NW-trends that are mainly controlled by normal faults. The maximum thicknesses of the strata are up to 4100 m. From the Cryogenian to Ediacaran, most of the main inherited faults to active and eventually ceased at the end of the Ediacaran or Early Cambrian, while subsidence centres appeared and migrated eastward along the faults. They revealed that the different parts of the Tarim continental block were in NNE-SSWoriented and NNW-SSE-oriented extensional paleo-stress fields(relative to the present) during the Neoproterozoic, and were accompanied by clockwise shearing. According to the analysis of the activities of syn-sedimentary faults, filling sediments,magmatic events, and coordination with aeromagnetic anomalies, the tectonic properties of the fault depressions are different and are primarily continental rifts or intra-continental fault-controlled basins. The rifting phases mainly occurred from 0.8–0.61 Ga.The formation of the rifting depression was associated with the initial opening of the South Altun-West Kunlun Ocean and the South Tianshan Ocean, which were located at the northern and southern margins of the Tarim Block, respectively, in response to the break-up of the Supercontinent Rodinia and the initial opening of the Proto-Tethys Ocean.Bizhu HE Cunli JIAO Taizhu HUANG Xingui ZHOU Zhihui CAI Zicheng CAO Zhongzheng JIANG Junwen CUI Zhuoyin YU Weiwei CHEN Ruohan LIU Xiaorui YUN Guangming HAO 2019Science China Earth Sciences2019,62,3:2
4Highly efficient degradation of emerging contaminants by magnetic CuO@Fe_(x)O_(y) derived from natural mackinawite(FeS) in the presence of peroxymonosulfate显示文摘In this study,natural mackinawite (Fe S),a chalcophilic mineral,was utilized to prepare iron/copper bimetallic oxides (Cu^(O)@Fe_(x)O_(y)) by displacement plating and calcination process.Various characterization methods prove that Cu;is successfully coated on the surface of Fe S,which were further oxidized to Cu^(O),Fe_(3)O_(4)and/or Fe_(2)O_(3)during calcination process,respectively.Cu^(O)@Fe_(x)O_(y)performed highly efficient capacity to activate PMS for the degradation of various emerging pollutants including sulfamethoxazole(SMX),carbamazepine (CBZ),bisphenol A (BPA),2,4-dichlorophenol (2,4-DCP) and diclofenac (DCF) in aqueous solution.Complete removal of the above pollutants was observed after 8 min of Cu^(O)@Fe_(x)O_(y)/PMS treatment.Taking SMX as an example,the key parameters including Cu^(O)@Fe_(x)O_(y)dosage,PMS dosage and initial p H were optimized.The results show that the catalytic system can be worked in a wide p H range (3.0-9.0).The quenching experiments and electron spin resonance (ESR) test demonstrated that the main reactive oxygen species in Cu^(O)@Fe_(x)O_(y)/PMS system were hydroxyl radicals (^(·)OH) and sulfate radicals(SO_(4)^(·ˉ)),and SO_(4)^(·ˉ)was the primary reactive species.Besides,the influence of coexisting anions (i.e.,Cl^(ˉ),NO_(3)^(ˉ),HCO_(3)^(ˉ)and H_(2)PO_(4)^(ˉ)) for the degradation of SMX was explored.Cu^(O)@Fe_(x)O_(y)/PMS system can maintain good catalytic activity and reusability in different water bodies and long-term running.This work provided a green strategy to fabricate the efficient catalyst in PMS-based advanced oxidation processes.Ruohan Zhang Maolian Chen Zhaokun Xiong Yong Guo Bo Lai 2022Chinese Chemical Letters2022,33,2:1
5Tuning Active Metal Atomic Spacing by Filling of Light Atoms and Resulting Reversed Hydrogen Adsorption-Distance Relationship for Efficient Catalysis显示文摘Precisely tuning the spacing of the active centers on the atomic scale is of great significance to improve the catalytic activity and deepen the understanding of the catalytic mechanism,but still remains a challenge.Here,we develop a strategy to dilute catalytically active metal interatomic spacing(d_(M-M))with light atoms and discover the unusual adsorption patterns.For example,by elevating the content of boron as interstitial atoms,the atomic spacing of osmium(d_(Os-Os))gradually increases from 2.73 to 2.96?.More importantly,we find that,with the increase in dOs-Os,the hydrogen adsorption-distance relationship is reversed via downshifting d-band states,which breaks the traditional cognition,thereby optimizing the H adsorption and H_2O dissociation on the electrode surface during the catalytic process;this finally leads to a nearly linear increase in hydrogen evolution reaction activity.Namely,the maximum dOs-Os of 2.96?presents the optimal HER activity(8 mV@10 mA cm^(-2))in alkaline media as well as suppressed O adsorption and thus promoted stability.It is believed that this novel atomic-level distance modulation strategy of catalytic sites and the reversed hydrogen adsorption-distance relationship can shew new insights for optimal design of highly efficient catalysts.Ding Chen Ruihu Lu Ruohan Yu Hongyu Zhao Dulan Wu Youtao Yao Kesong Yu Jiawei Zhu Pengxia Ji Zonghua Pu Zongkui Kou Jun Yu Jinsong Wu Shichun Mu 2023Nano-Micro Letters2023,15,10:0
6Photoexcitation-induced passivation of SnO_(2) thin film for efficient perovskite solar cells显示文摘A high-quality tin oxide electron transport layer(ETL)is a key common factor to achieve high-performance perovskite solar cells(PSCs).However,the conventional annealing technique to prepare high-quality ETLs by continuous heating under near-equilibrium conditions requires high temperatures and a long fabrication time.Alternatively,we present a non-equilibrium,photoexcitation-induced passivation technique that uses multiple ultrashort laser pulses.The ultrafast photoexcitation and following electron–electron and electron–phonon scattering processes induce ultrafast annealing to efficiently passivate surface and bulk defects,and improve the crystallinity of SnO_(2),resulting in suppressing the carrier recombination and facilitating the charge transport between the ETL and perovskite interface.By rapidly scanning the laser beam,the annealing time is reduced to several minutes,which is much more efficient compared with conventional thermal annealing.To demonstrate the university and scalability of this technique,typical antisolvent and antisolvent-free processed hybrid organic–inorganic metal halide PSCs have been fabricated and achieved the power conversion efficiency(PCE)of 24.14%and 22.75%respectively,and a 12-square-centimeter module antisolvent-free processed perovskite solar module achieves a PCE of 20.26%,with significantly enhanced performance both in PCE and stability.This study establishes a new approach towards the commercialization of efficient low-temperature manufacturing of PSCs.Nianyao Chai Xiangyu Chen Zhongle Zeng Ruohan Yu Yunfan Yue Bo Mai Jinsong Wu Liqiang Mai Yi-Bing Cheng Xuewen Wang 2023National Science Review2023,10,11:0
7Nowcasting and Forecasting Seasonal Influenza Epidemics—China,2022-2023显示文摘Background:Seasonal influenza resurged in China in February 2023,causing a large number of hospitalizations.While influenza epidemics occurred across China during the coronavirus disease 2019(COVID-19)pandemic,the relaxation of COVID-19 containment measures in December 2022 may have contributed to the spread of acute respiratory infections in winter 2022/2023.Methods:Using a mathematical model incorporating influenza activity as measured by influenza-like illness(ILI)data for northern and southern regions of China,we reconstructed the seasonal influenza incidence from October 2015 to September 2019 before the COVID-19 pandemic.Using this trained model,we predicted influenza activities in northern and southern China from March to September 2023.Results:We estimated the effective reproduction number Re as 1.08[95%confidence interval(CI):0.51,1.65]in northern China and 1.10(95%CI:0.55,1.67)in southern China at the start of the 2022-2023 influenza season.We estimated the infection attack rate of this influenza wave as 18.51%(95%CI:0.00%,37.78%)in northern China and 28.30%(95%CI:14.77%,41.82%)in southern China.Conclusions:The 2023 spring wave of seasonal influenza in China spread until July 2023 and infected a substantial number of people.Zhanwei Du Zengyang Shao Xiao Zhang Ruohan Chen Tianmu Chen Yuan Bai Lin Wang Eric H.Y.Lau Benjamin J.Cowling 2023China CDC weekly2023,5,49:0
8Realizing Plain Optimization of the Thermoelectric Properties in BiCuSeO Oxide via Self-Substitution-Induced Lattice Dislocations显示文摘Seeking new strategies to tune the intrinsic defect and optimize the thermoelectric performance via no or less use of external doped elements(i.e.,plain optimization)is an important method to realize the sustainable development of thermoelectric materials.Meanwhile,creating dislocation defects in oxide systems is quite challenging because the rigid and stiff ionic/covalent bonds can hardly tolerate the large strain energy associated with dislocations.Herein,taking BiCuSe_(O) oxide as an example,the present work reports a successful construction of dense lattice dislocations in BiCuSe_(O) by self-doping of Se at the O site(i.e.,Se_(O) self-substitution),and achieves plain optimization of the thermoelectric properties with only external Pb doping.Owing to the self-substitution-induced large lattice distortion and the potential reinforcement effect by Pb doping,high-density(about 3.0×10^(14 )m^(−2))dislocations form in the grains,which enhances the scattering strength of mid-frequency phonon and results in a substantial low lattice thermal conductivity of 0.38 W m^(−1) K^(−1) at 823 K in Pb-doped BiCuSe_(O).Meanwhile,PbBi doping and Cu vacancy markedly improve the electrical conductivity while maintaining a competitively high Seebeck coefficient,thereby contributing to a highest power factor of 942μW m^(−1) K^(−2).Finally,a remarkably enhanced zT value of 1.32 is obtained at 823 K in Bi_(0.94)Pb_(0.06)Cu_(0.97)Se_(1.05)O_(0.95) with almost compositional plainification.The high-density dislocation structure reported in this work will also provide a good inspiration for the design and construction of dislocations in other oxide systems.Rui Xu Zhiwei Chen Qizhu Li Xiaoyu Yang Han Wan Mengruizhe Kong Wei Bai Nengyuan Zhu Ruohan Wang Jiming Song Zhou Li Chong Xiao Binghui Ge 2023Research2023,,4:0
9The effect of cylindrospermopsin on the bacterioplankton community:a microcosm experiment on water from Dishui Lake,Shanghai,China显示文摘Eutrophication and climate warming have intensified the global expansion of invasive cyanobacteria such as Cylindrospermopsis spp.and Chrysosporum spp.Cylindrospermopsin(CYN)produced by species of the latter two genera may harm phytoplankton,zooplankton,and fishes.However,effects of CYN on the bacterioplankton community have not been studied.Based on high-throughput sequencing,we explored the effect of CYN on the structure and function of the bacterioplankton community by adding pure CYN to in-situ water collected from a brackish coastal shallow lake:Dishui Lake,China.We found that most bacterioplankton taxa had a certain tolerance potential to CYN,but that high concentrations of CYN(40μg/L)caused a significant decrease in microbial abundance and functional groups.Of the dominant phyla,Actinobacteria had the strongest tolerance to CYN.Network analysis indicated that CYN caused shifts in the community structure of the bacterioplankton,reducing community stability and structural complexity.High CYN concentrations also reduced the correlation between the different bacterioplankton groups,and the abundances of some bacterial taxa associated with the denitrification function and the process of carbon transfer in the microbial food web were inhibited.Our study provide s new insight into the response of the bacterioplankton communities to harmful algal toxins produced by cyanobacteria.Sicheng YIN Ruohan HUANG Erik JEPPESEN Lijing CHEN Liqing WANG Xin FANG Wei ZHANG 2022Journal of Oceanology and Limnology2022,40,5:0
10Metabolic signatures and potential biomarkers for the diagnosis and treaeatment of colon cancer cachexia显示文摘Cancer cachexia(CAC)is a debilitating condition that often arises from noncachexia cancer(NCAC),with distinct metabolic characteristics and medical treatments.However,the metabolic changes and underlying molecular mechanisms during cachexia progression remain poorly understood.Understanding the progression of CAC is crucial for developing diagnostic approaches to distinguish between CAC and NCAC stages,facilitating appropriate treatment for cancer patients.In this study,we establish a mouse model of colon CAC and categorize the mice into three groups:CAC,NCAC and normal control(NOR).By performing nuclear magnetic resonance(NMR)-based metabolomic profiling on mouse sera,we elucidate the metabolic properties of these groups.Our findings unveil significant differences in the metabolic profiles among the CAC,NCAC and NOR groups,highlighting significant impairments in energy metabolism and amino acid metabolism during cachexia progression.Additionally,we observe the elevated serum levels of lysine and acetate during the transition from the NCAC to CAC stages.Using multivariate ROC analysis,we identify lysine and acetate as potential biomarkers for distinguishing between CAC and NCAC stages.These biomarkers hold promise for the diagnosis of CAC from noncachexia cancer.Our study provides novel insights into the metabolic mechanisms underlying cachexia progression and offers valuable avenues for the diagnosis and treatment of CAC in clinical settings.Xu Qiu Ruohan Lu Qiqing He Shu Chen Caihua Huang Donghai Lin 2023Acta Biochimica et Biophysica Sinica2023,55,12:0
11Inhibition of aryl hydrocarbon receptor signaling promotes the terminal differentiation of human erythroblasts显示文摘The aryl hydrocarbon receptor(AHR)plays an important role during mammalian embryo development.Inhibition of AHR signaling promotes the development of hematopoietic stem/progenitor cells.AHR also regulates the functional maturation of blood cells,such as T cells and megakaryocytes.However,little is known about the role of AHR modulation during the development of erythroid cells.In this study,we used the AHR antagonist StemRegenin 1(SR1)and the AHR agonist 2,3,7,8-tetrachlorodibenzo-p-dioxin during different stages of human erythropoiesis to elucidate the function of AHR.We found that antagonizing AHR signaling improved the production of human embryonic stem cell derived erythrocytes and enhanced erythroid terminal differentiation.RNA sequencing showed that SR1 treatment of proerythroblasts upregulated the expression of erythrocyte differentiation-related genes and downregulated actin organization-associated genes.We found that SR1 accelerated F-actin remodeling in terminally differentiated erythrocytes,favoring their maturation of the cytoskeleton and enucleation.We demonstrated that the effects of AHR inhibition on erythroid maturation were associated with F-actin remodeling.Our findings help uncover the mechanism for AHRmediated human erythroid cell differentiation.We also provide a new approach toward the large-scale production of functionally mature human pluripotent stem cell-derived erythrocytes for use in translational applications.Yijin Chen Yong Dong Xulin Lu Wanjing Li Yimeng Zhang Bin Mao Xu Pan Xiaohong Li Ya Zhou Quanming An Fangxin Xie Shihui Wang Yuan Xue Xinping Cai Mowen Lai Qiongxiu Zhou Yan Yan Ruohan Fu Hong Wang Tatsutoshi Nakahata Xiuli An Lihong Shi Yonggang Zhang Feng Ma 2022Journal of Molecular Cell Biology2022,14,2:0
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