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| 1 | Enhanced CO catalytic oxidation by Sr reconstruction on the surface of LaxSr1-xCoO3-δ显示文摘Surface electronic structure of solid materials plays a critical role in heterogeneous catalysis. However,surface chemical composition of the perovskite oxides is usually dominated by segregated A-site cations and the amount of oxygen vacancies is relatively low, which seriously restricts their catalytic oxidation property. Here, we prepare perovskite La_xSr_(1-x)CoO_(3-δ)(x = 0.3, 0.5, 0.7) with different Sr doping amount and experiment results show that perovskite LSCO with higher content of surface Sr possesses more oxygen vacancies and better catalytic activity. On this basis, we develop a new experimental strategy to create more surface oxygen vacancies to promote their CO catalytic activity. In this method, we use high active hydrogen atoms(BH^(4-)) as reductant to realize surface in-situ chemical composite modification of La_xSr_(1-x)CoO_(3-δ)(x = 0.3, 0.5, 0.7), which causes their surface reconstruction(surface Sr enrichment).The regulation mainly focuses on the atomic layer level without damaging their bulk phase structure.Different from traditional high temperature annealing under reducing atmosphere, this method is high-efficiency, green and controllable. Furthermore, we study the surface reconstruction process and demonstrated that it is atomic layer engineering on the surface of La_xSr_(1-x)CoO_(3-δ)(x = 0.3, 0.5, 0.7) by X-ray photoelectron spectroscopy(XPS) and X-ray absorption fine structure(XAFS). Our experiment results also show that these samples treated by this method exhibit superior activity for CO oxidation compared with original samples. | Xiyang Wang Keke Huang Jingyu Qian Yingge Cong Chengda Ge Shouhua Feng | 2017 | Science Bulletin2017，62，9： | 5 |
| 2 | Posterior quadrantic disconnection maintains the activity of isolated temporal-parietal-occipital nerve tissue: neuroprotective measures in the surgical treatment of epilepsy显示文摘Extensive lesions involving the posterior quadrant of the cerebral hemisphere(temporal,parietal,and occipital lobes)induce intractable epilepsy.These patients are potential candidates for surgical treatment[1].Maintenance of isolated nerve tissue activity after surgery plays a crucial role in the neuroprotective effects of neurosurgery treatment.Disconnection surgery of the posterior quadrant is used to completely isolate nerve fibers,while blood supply at the isolated lobes is maintained.Subsequently,cavities caused by | Shaoya Yin Keke Feng Mei Feng Xueqing Zhang Yuqin Zhang | 2014 | Neural Regeneration Research2014，9，4： | 4 |
| 3 | Mixed H_2/H_∞ State Feedback Attitude Control of Microsatellite Based on Extended LMI Method显示文摘For the appearance of the additive perturbation of controller gain when the controller parameter has minute adjustment at the initial running stage of system,to avoid the adverse effects,this paper investigates the mixed H_2/H_∞ state feedback attitude control problem of microsatellite based on extended LMI method.Firstly,the microsatellite attitude control system is established and transformed into corresponding state space form.Then,without the equivalence restriction of the two Lyapunov variables of H_2 and H∞performance,this paper introduces additional variables to design the mixed H_2/H_∞ control method based on LMI which can also reduce the conservatives.Finally,numerical simulations are analyzed to show that the proposed method can make the satellite stable within 20 s whether there is additive perturbation of the controller gain or not.The comparative analysis of the simulation results between extended LMI method and traditional LMI method also demonstrates the effectiveness and feasibility of the proposed method in this paper. | Keke Shi Chuang Liu Feng Wang Zhaowei Sun | 2016 | Journal of Harbin Institute of Technology(New Series)2016，23，5： | 2 |
| 4 | Epitaxial thin film of SmFeO_3 ferroelectric heterostructures显示文摘Epitaxial growth of SmFeO3/SrRuO3 was achieved on SrTiO3 substrates by the pulsed laser deposition(PLD)method at 973 K under oxygen partial pressure of 12.5 Pa.No Fe2+leakage was detected in our SmFeO3 film.The remanent polarization and coercive electric field of the thin film with a higher degree of orientation along(110)were 1.97μC/cm2 and 0.89×104 V/cm at room temperature,respectively.This film showed enhanced canted antiferromagnetism spin ordering compared with its corresponding powder materials. | SI WenZhe HUANG KeKe WU XiaoFeng FENG ShouHua | 2014 | Science China Chemistry2014，57，6： | 2 |
| 5 | Novel internal photoemission in manganite/ZnO heterostructure显示文摘A novel photovoltaic phenomenon of internal photoemission was found in a low cost manganite La0.62Ca0.29K 0.09MnO3 (LCKMO)/zinc oxide (ZnO) heterojunction bilayers grown on ITO substrate by pulsed laser deposition (PLD) at relative low growth temperature. The heterostructure ITO/LCKMO/ZnO/Al exhibits reproducible rectifying characteristics and light current under continuous laser irradiation of = 325 nm. We report here the influence of LCKMO/ZnO bilayers' thickness on the electrical and photoelectric properties of the heterostructure at room temperature. The power conversion efficiency (PCE) is achieved when the LCKMO and ZnO layers are thin enough or the full space charge layer is sufficient. We obtained the maximum value of PCE of 0.0145% when the thicknesses of LCKMO and ZnO layers are 25 and 150 nm, respectively. The open circuit voltage is 0.04 V under this condition due to the internal photoemission. | ZHANG JiaQi HUANG KeKe SI WenZhe WU XiaoFeng CHENG Gang FENG ShouHua | 2013 | Science China Chemistry2013，56，5： | 2 |
| 6 | Strategies for improving fertilizer phosphorus use efficiency in Chinese cropping systems显示文摘A four-year project,entitled'The mechanisms of fraction transformation and high use efficiency of P fertilizer in Chinese cropping systems'commenced in 2017.The project was established to answer three key questions and looked at 17 cropping systems on ten soils.First,we asked what are the dynamics of transformation,fixation and mobilization of P fertilizers in soil-cropping systems?Second,what are the mechanisms of soil-cropmicrobe interactions by which P fertilizer can be efficiently used?Third,how to manipulate the processes of P use in cropping systems?The targets of this project are(1)to explore the mechanisms of P fixation,the pathways of loss of P availability and the threshold of migration of fertilizer P in the field;(2)to uncover mechanisms by which soil legacy P is mobilized through root physiological and morphological processes and through arbuscular mycorrhizal fungi and P-solubilizing bacteria in rhizosphere and hyphosphere;(3)to estimate the biological potential of crops for high efficiency P absorption and use;(4)to innovate new approaches for improving the efficiency of P fertilizers.The outcomes will provide theoretical support for setting standards for limitation of P fertilizer application rate in the main cropping zones of China. | Gu FENG Jingping GAI Xionghan FENG Haigang LI Lin ZHANG Keke YI Jialong LV Yiyong ZHU Li TANG Yilin LI | 2019 | Frontiers of Agricultural Science and Engineering2019，6，4： | 2 |
| 7 | Saddle-Dolomite-Bearing Fracture Fillings and Records of Hot Brine Activity in the Jialingjiang Formation,Libixia Section,Hechuan Area of Chongqing City显示文摘Most vein minerals deposited in fractures of the Jialingjiang Formation from Libixia section,Hechan area include a large amount of saddle dolomite and accompanying celestite,calcite and fluorite.This study analyzed the nature,source,evolution of the fluids by plane-light petrography,fluid-inclusion methods,cathodoluminescence images,and stable isotopic compositions.The homogenization temperatures of two-phase aqueous fluid inclusions in dolomite range between100 and 270℃.Combined with theδ^(18)O data,it is suggested that the fluid responsible for the precipitation of fracture fillings haveδ^(18)O values between 10‰and 18‰(relative to SMOW).The saddle dolomite and the accompanying minerals were the result of activity of dense brines at elevated temperatures.Moreover,analysis shows that the fluid was derived from a mixture of marine-derived brine and deeper circulating flow.This fluid was enriched in Sr during diagenesis and formed celestite in fracture and for regional mineralization.Dissolution of saddle dolomite was attributed to the cooling of Mg/Ca-decreased fluids,which may relate to a leaching of gypsum to celestite in surrounding carbonates. | HUANG Keke ZHONG Yijiang HUANG Sijing LI Xiaoning FENG Mingshi | 2016 | Acta Geologica Sinica(English Edition)2016，90，1： | 2 |
| 8 | Design of platinum single-atom doped metal nanoclusters as efficient oxygen reduction electrocatalysts by coupling electronic descriptor显示文摘Inspired by the single-atom catalysts(SACs)concept,we rationally design a series of Pt single atom catalysts embedded in different transition metal nanoclusters through first-principles calculations.In these so-called“crown-jewel”(CJ)structures,Pt atoms(jewels)occupy the vertex sites of the metal nanocluster(crown)surface.We investigated the thermal stability and oxygen reduction reaction(ORR)catalytic activity of these catalysts.The results reveal that CJ-structured PtCu nanoclusters are stable and possess a comparable or even better ORR activity compared to Pt catalyst,making it a promising candidate for low-cost ORR catalysts.The effect of cluster size on the adsorption strength of ORR intermediates and catalytic property has also been studied.Furthermore,the overall ORR catalytic activity trend of these SACs is explained based on analysis of their electronic properties.A descriptorΨwas established to provide further insight into the correlation between the electronic structure and catalytic activity,which provides a design strategy for new ORR catalysts.More importantly,we reveal that this electronic descriptor can be extended to predict other CJ-structured nanoclusters. | Qing Liu Xiaoxu Wang Lu Li Keke Song Ping Qian Yuan Ping Feng | 2022 | Nano Research2022，15，8： | 1 |
| 9 | Enhancement of the enzymatic digestibility of sugarcane bagasse by alkali-per?acetic acid pretreatment显示文摘 | Zhao Xuebing Peng Feng Cheng Keke | 2009 | Enzyme and Microbial Technolo?gy2009，44，1： | 1 |
| 10 | Enhancement of the enzymatic digestibility of sugarcane bagasse by alkali–peracetic acid pretreatment显示文摘 | Xuebing Zhao Feng Peng Keke Cheng Dehua Liu | 2008 | Enzyme and Microbial Technology2008，，1： | 1 |
| 11 | Crystalfacet tailoring arts in perovskite oxides 显示文摘 | HUANG Keke YUAN Long FENG Shouhua | 2015 | InorganicChemistry Frontiers-2015，2，： | 1 |
| 12 | The effect of NH方 on shape modulation of Lai_xSrxMn03 crystals in a hydrothermal environment 显示文摘 | HUANG Keke FENG Wenchen YUAN Long | 2014 | CrystEngComm2014，16，： | 1 |
| 13 | Enhancement of the enzymatic digestibility of sugarcane bagasse by alkali- peracetic acid pretreatment显示文摘 | Zhao Xuebing Peng Feng Cheng Keke | 2009 | Enzyme and Microbial Technology2009，44，： | 1 |
| 14 | Enhancement of the enzymatic digestibility of sugarcane bagasse by alkali-peracetic acid pretreatment 显示文摘 | XUEBING ZHAOA FENG PENGB KEKE CHENG et al | 2009 | Enzyme and Microbial Technology Enzyme and Microbial Technology2009，44，1： | 1 |
| 15 | NO hydrogenation to NH3 over FeCu/TiO_(2) catalyst with improved activity显示文摘Ammonia is crucial in industry and agriculture, but its production is hindered by environmental concerns and energy-intensive processes. Hence, developing an efficient and environmentally friendly catalyst is imperative. In this study, we employed a straightforward and efficient impregnation technique to create various Cu-doped catalysts. Notably, the optimized 10Fe-8Cu/TiO_(2) catalyst exhibited exceptional catalytic performance in converting NO to NH3, achieving an NO conversion rate exceeding 80% and an NH3 selectivity exceeding 98% at atmospheric pressure and 350 °C. We employed in situ diffuse reflectance Fourier transform infrared spectroscopy and conducted density functional theory calculations to investigate the intermediates and subsequent adsorption. Our findings unequivocally demonstrate that Cu doping enhances the rate-limiting hydrogenation step and lowers the energy barrier for NH3 desorption, thereby resulting in improved NO conversion and enhanced selectivity toward ammonia. This study presents a pioneering approach toward energy-efficient ammonia synthesis and recycling of nitrogen sources. | Dan Cui Yanqin Li Keke Pan Jinbao Liu Qiang Wang Minmin Liu Peng Cao Jianming Dan Bin Dai Feng Yu | 2023 | Frontiers of Chemical Science and Engineering2023，17，12： | 1 |
| 16 | Construction of an artificial intelligence system in dermatology: effectiveness and consideration of Chinese Skin Image Database (CSID)显示文摘After more than 60 years of development,artificial intelligence(AI)has been widely used in various fields.Especially in recent years,with the development of deep learning,AI has made many remarkable achievements in the medical field.Dermatology,as a clinical discipline with morphology as its main feature,is particularly suitable for the development of AI.The rapid development of skin imaging technology has helped dermatologists to assist in the diagnosis of diseases and has greatly improved the accuracy of diagnosis.Skin imaging data have natural big data attributes,which is important for AI research.The establishment of the Chinese Skin Image Database(CSID)has solved many problems such as isolated data islands and inconsistent data quality.Based on the CSID,many pioneering achievements have been made in the research and development of AI-assisted decision-making software,the establishment of expert organizations,personnel training,scientific research,and so on.At present,there are still many problems with AI in the field of dermatology,such as clinical validation,medical device licensing,interdisciplinary,and standard formulation,which urgently need to be solved by joint efforts of all parties. | Chengxu Li Wenmin Fei Yang Han Xiaoli Ning Ziyi Wang Keke Li Ke Xue Jingkai Xu Ruixing Yu Rusong Meng Feng Xu Weimin Ma Yong Cui | 2021 | Intelligent Medicine2021，1，2： | 1 |
| 17 | Electron transfer in Cu/Cu_(2)O generated by disproportionation promoting efficient CO_(2)photoreduction显示文摘Constructing a high-efficiency composite material for CO_(2)photoreduction is a key step to the achievement of carbon neutralization,but a comprehensive understanding of the factors that dictate CO_(2)reduction activity remains elusive.Here,we constructed a series of Cu in situ combined on Cu_(2)O(Cu/Cu_(2)O-1,-2,-3)via an acid disproportionation method with various processing time.The optimal photocatalyst(Cu/Cu_(2)O-2)affords CO at a rate of 10.43μmol·g^(−1)·h^(−1),which is more than fourfold to that of pristine Cu_(2)O.Electron transfer in the samples was detected by X-ray absorption spectroscopy(XAS)as well as X-ray photoelectron spectroscopy(XPS).Interestingly,the best photoreduction performance was not achieved by the sample possessing the most electron transfer(Cu/Cu_(2)O-1)but by the one with moderate electron transfer(Cu/Cu_(2)O-2).By virtue of density functional theory(DFT)calculations,a linear relationship between Bader charge variation(Δq)of the active sites and adsorption energy of CO_(2)reduction intermediates was discovered,wherein the moderate charge transfer corresponds to appropriate adsorption energy,which benefits CO_(2)photoreduction activity substantially.This work provides guidance for the construction of composite catalysts for efficient CO_(2)photoreduction in a perspective of the quantity of electron transfer. | Qian Zhu Kainan Zhu Minmin Cai Yaowen Zhang Zhiyu Shao Mengpei Jiang Xiyang Wang Zhibin Geng Xiaofeng Wu Manrong Li Keke Huang Shouhua Feng | 2022 | Nano Research2022，15，8： | 0 |
| 18 | The genome of Orychophragmus violaceus provides genomic insights into the evolution of Brassicaceaepolyploidizationandits distinct traits显示文摘Orychophragmus violaceus,referred to as‘‘eryuelan’’(February orchid)in China,is an early-flowering ornamental plant.The high oil content and abundance of unsaturated fatty acids in O.violaceus seeds make it a potential high-quality oilseed crop.Here,we generated a whole-genome assembly for O.violaceus using Nanopore and Hi-C sequencing technologies.The assembled genome of O.violaceus was~1.3 Gb in size,with 12 pairs of chromosomes.Through investigation of ancestral genome evolution,we determined that the genome of O.violaceus experienced a tetraploidization event from a diploid progenitor with the translocated proto-Calepineae karyotype.Comparisons between the reconstructed subgenomes of O.violaceus identified indicators of subgenome dominance,indicating that subgenomes likely originated via allotetraploidy.O.violaceus was phylogenetically close to the Brassica genus,and tetraploidy in O.violaceus occurred approximately 8.57 million years ago,close in time to the whole-genome triplication of Brassica that likely arose via an intermediate tetraploid lineage.However,the tetraploidization in Orychophragmus was independent of the hexaploidization in Brassica,as evidenced by the results from detailed phylogenetic analyses and comparisons of the break and fusion points of ancestral genomic blocks.Moreover,identification of multi-copy genes regulating the production of high-quality oil highlighted the contributions of both tetraploidization and tandem duplication to functional innovation in O.violaceus.These findings provide novel insights into the polyploidization evolution of plant species and will promote both functional genomic studies and domestication/breeding efforts in O.violaceus. | Kang Zhang Yinqing Yang Xin Zhang Lingkui Zhang Yu Fu Zhongwei Guo Shumin Chen Jian Wu James C.Schnable Keke Yi Xiaowu Wang Feng Cheng | 2023 | Plant Communications2023，4，2： | 0 |
| 19 | Manipulation and observation of atomic-scale superlattices in perovskite manganate显示文摘Superlattices in crystals,particularly in perovskite oxides with strong correlation effects,can create new states of matter and produce peculiar physicochemical phenomena.However,the newfangled perovskite superlattices depend on physical deposition with unit-cell precision.It has been challenging to explore a new suitable chemical method to tailor perovskite superlattices.Herein,we present a new bottomup strategy to precisely prepare atomic-scale oxide superlattices of(LaMnO_(3))_(1)-(La_(1-x-y)Ca_(x)K_(y)MnO_(3))_(2)in a monodispersed perovskite La_(0.66)Ca_(0.29)K_(0.05)MnO_(3)(LCKMO).The special atomic-scale perovskite superlattices are demonstrated using SAED,HAADF-STEM,XRD,and atomic-resolution elemental mapping.Our experiments reveal that the perovskite superlattices can be fabricated under extreme hydrothermal conditions utilizing ultra-high concentrations of KOH.An approximate molten salt system in the hydrothermal process can induce the disproportionation reaction of MnO_(2)solids,which is vital to the growth of ordered perovskite superlattices.This work not only clarifies the hydrothermal growth process of perovskite oxides in extreme conditions,but also proposes a novel engineering route toward perovskite superlattices. | Xiyang Wang Keke Huang Xiaofeng Wu Long Yuan Liping Li Guangshe Li Shouhua Feng | 2023 | Chinese Chemical Letters2023，34，12： | 0 |
| 20 | Surface polarization enables high charge separation in TiO_(2) nanorod photoanode显示文摘Poor charge separation efficiency of semiconductors often stands in the way of photoelectrochemical (PEC) water splitting realization. In this report, a surface polarized TiO_(2) photoanode is obtained via −OH moiety decoration, which achieves a fundamentally improved charge separation efficiency of about 94% at 1.23 VRHE. Detailed data shows that these hydroxyls with electric dipoles polarize the surface, inducing substantial electric field in the surface region, and elevating band edges so as to form a homojunction within TiO_(2). Such serves as the direct driving force for the photogenerated charge separation and migration. Moreover, these hydroxyls also facilitate water oxidation kinetics. Without typical doping or cocatalyst, surface polarized TiO_(2) photoanode delivers a considerably increased photocurrent density of about 1.41 mA·cm^(−2) at 1.23 VRHE (AM 1.5 G) and a cathodic shift on onset potential over 200 mV. This report highlights new opportunities to modulate charge separation by surface polarization for the construction of robust photoanodes. | Wei Ma Keke Huang Xiaofeng Wu Meng Wang Shouhua Feng | 2021 | Nano Research2021，14，11： | 0 |
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