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| 1 | Oxygen-vacancy-rich TiO_(2)enables highly active and durable water electrolysis of urchin-like RuO_(2)catalyst显示文摘The material innovation is prerequisite to accelerating sluggish oxygen evolution reaction(OER)kinetics,thus promoting the realization of hydrogen energy community.Herein,we develop an oxygen-vacancy-rich TiO_(2)supported RuO_(2)catalyst(RuO_(2)@r-TiO_(2))towards improved OER activity and stability.The oxygen vacancy on TiO_(2)not only supplies electrons to produce lower valence Ru,but also provides sufficient anchoring site for the deposition of RuO_(2)nanocrystal.Beyond that,it can generate strong electronic interaction between TiO_(2)and supported RuO_(2),and thereby tailors the intermediates’adsorption energy on the RuO_(2)surface.As a result,the derived RuO_(2)@r-TiO_(2)catalyst exhibits superior OER activity and stability with the overpotential of 211 mV at a current density of 10 mA cm^(−2)and negligible activity degradation after 6 h operation,outperforming the non-oxygen-vacancy counterpart(223.3 mV,12.75%activity loss)and RuO_(2)catalyst(234.6 mV,42.86%activity loss). | GAO HongMei XIAO MeiLing LI GuoQiang GAO LiQin MENG QingLei LUO ZhaoYan LUO ErGui LIU ChangPeng JIN Zhao GE JunJie XING Wei | 2022 | Science China(Technological Sciences)2022，65，10： | 3 |
| 2 | Microenvironment regulation of M-N-C single-atom catalysts towards oxygen reduction reaction显示文摘The development of cost-effective,robust,and durable electrocatalysts to replace the expensive Pt-based catalysts towards oxygen reduction reaction(ORR)is the trending frontier research topic in renewable energy and electrocatalysis.Particular attention has been paid to metal-nitrogen-carbon(M-N-C)single atom catalysts(SACs)due to their maximized atom utilization efficiency,biomimetic active site,and distinct electronic structure.More importantly,their catalytic properties can be further tailored by rationally regulating the microenvironment of active sites(i.e.,M-N coordination number,heteroatom doping and substitution.Herein,we present a comprehensive summary of the recent advancement in the microenvironment regulation of MN-C SACs towards improved ORR performance.The coordination environment manipulation regarding central metal and coordinated atoms is first discussed,focusing on the structure-function relationship.Apart from the near-range coordination,longrange substrate modulation including heteroatom doping,defect engineering is discussed as well.Besides,the synergy mechanism of nanoparticles and single atom sites to tune the electron cloud density at the active sites is summarized.Finally,we provide the challenges and outlook of the development of M-N-C SACs. | Li Zhang Qinglei Meng Ruixue Zheng Liuqing Wang Wei Xing Weiwei Cai Meiling Xiao | 2023 | Nano Research2023，16，4： | 2 |
| 3 | Karyotype Analysis of Cyprinus carpio in Dongping Lake显示文摘To investigate the genetic composition of the carp( Cyprinus carpio) in Dongping Lake and to provide cytogenetic data for exploration,protection and appropriate utilization of the germplasm resources,karyotype of the carp was analyzed in this study.In detail,colchicine was given to the fish an intraperitoneal route 24 h after the intraperitoneal injection of phytohemagglutinin( PHA) solution to arrest cells in metaphase.The kidney cells were collected for the preparation of chromosome specimens,which were observed under a microscope.Ten cells having correct number of chromosomes and clear morphology were photographed and zoomed to measure the relative length,arm ratio,arm number( NF) and other parameters of chromosomes.The results showed that the chromosome number of C.carpio in Dongping Lake was( 2 n = 100); the karyotype formula was( 2 n = 20 m + 38 sm + 20 st + 22 t).The total number of chromosome arms( NF) was 158.By comparing the karyotype of Dongping Lake carp with that of other Cyprinus species,we concluded that Dongping Lake carp is more highly evolved among Cyprinus species. | Lu Hong Meng Qinglei Yang Ling | 2017 | Animal Husbandry and Feed Science2017，9，6： | 1 |
| 4 | Synthesis of the composite material Y/ASA and its catalytic performance for the cracking ofn-decane显示文摘 | Meng Qinglei Liu Baijun Piao Jiarui | 2012 | J Catal2012，290，1： | 1 |
| 5 | The investigation of stablility and optimal encapsulation time for ITO/CuPc/C60/A1 bilayer cells 显示文摘 | Xi Xi Li Fangxiao Meng Qinglei | 2010 | Solar Energy Materials & Solar Cells2010，94，5： | 1 |
| 6 | Efficient Security Multimedia System on Embedded Platform显示文摘Security video communication is a challenging task,especially for wireless video applications.An efficient security multimedia system on embedded platform is designed.By analyzing the hardware architecture and resource,the efficient DSP-based H.264/AVC coding is studied by efficient video coding techniques and system optimizing implementation.To protect the confidentiality and integrity of media information,a novel security mechanism is presented,which includes user identify authentication and a perceptual video encryption algorithm based on exploiting the special feature of entropy coding in H.264.Experimental results show that the proposed hardware framework has high performance and achieves a better balance between security and efficiency.The proposed security mechanism can achieve high security and low complexity cost,and has a little effect on the compression ratio and transmission bandwidth.What’s more,encoding and encryption at the same time,the performance of data process can meet real-time application. | WANG Lifeng MENG Qinglei XIAO Chen MA Jian DU Yaogang WANG Wendong | 2010 | China Communications2010，7，4： | 1 |
| 7 | Cobalt-Catalyzed Enantioselective Ring-Opening Reactions of Oxa- and Aza-bicyclic Alkenes with Alkenylboronic Acids显示文摘Catalytic enantioselective ring-opening of oxa-and aza-bicyclic alkenes with readily available accessible alkenylboronic acids,promoted by a chiral phosphine-Co complex,is reported.Such a process represents the unprecedented Co-catalyzed introduction of various alkenyl groups onto the oxa-and aza-bicyclic alkenes,affording a wide range of multisubstituted functionalized cyclohexenes in up to 98%yield and 99.5:0.5 er. | Di Zhu Yongmei Zhao Qinglei Chong Fanke Meng | 2022 | Chinese Journal of Chemistry2022，40，2： | 1 |
| 8 | Acute Toxicity of Four Drugs to Larvae of Channa argus显示文摘The acute toxicity of 4 drugs,dipterex,potassium permanganate,copper sulfate and formaldehyde to larvae of black-spot hybrid snakehead was tested with the semi hydrostatic test method under water temperature of( 28. 3 ± 1. 5) ℃,pH of( 8. 01 ± 0. 12) and dissolved oxygen of( 4. 6 ± 0. 5) mg / L. The results showed that 96 h median-lethal concentration( LC_(50)) of copper sulphate was the lowest,1. 586 mg/L,while 96 h LC50 of formaldehyde was the highest,115. 159 mg / L. The toxicity of the 4 drugs ranked in the order of copper sulphate,dipterex,potassium permanganate and formaldehyde from high to low. The safe concentrations( SCs) of the 4 drugs were in order of formaldehyde( 35. 529 mg / L),potassium permanganate( 1. 277 mg / L),dipterex( 1. 450 mg / L) and copper sulphate( 0. 882 mg / L). According to the results,the SCs of dipterex,formaldehyde and copper sulphate were higher than the conventional dosage,they were safe to be used for control of corresponding diseases of Channa argus by the conventional dosage. The SC of potassium permanganate was in the conventional dosage range,so it could be used for control of diseases in accordance with the SC of C. argus to the drug in production. | Zhenhai YU Yongan ZHU Qinglei MENG Shuren ZHU Xirong WANG | 2016 | Agricultural Biotechnology2016，5，6： | 1 |
| 9 | High-Performance Magnetic-core Coils for Targeted Rodent Brain Stimulations显示文摘Objective and Impact Statement.There is a need to develop rodent coils capable of targeted brain stimulation for treating neuropsychiatric disorders and understanding brain mechanisms.We describe a novel rodent coil design to improve the focality for targeted stimulations in small rodent brains.Introduction.Transcranial magnetic stimulation(TMS)is becoming increasingly important for treating neuropsychiatric disorders and understanding brain mechanisms.Preclinical studies permit invasive manipulations and are essential for the mechanistic understanding of TMS effects and explorations of therapeutic outcomes in disease models.However,existing TMS tools lack focality for targeted stimulations.Notably,there has been limited fundamental research on developing coils capable of focal stimulation at deep brain regions on small animals like rodents.Methods.In this study,ferromagnetic cores are added to a novel angle-tuned coil design to enhance the coil performance regarding penetration depth and focality.Numerical simulations and experimental electric field measurements were conducted to optimize the coil design.Results.The proposed coil system demonstrated a significantly smaller stimulation spot size and enhanced electric field decay rate in comparison to existing coils.Adding the ferromagnetic core reduces the energy requirements up to 60%for rodent brain stimulation.The simulated results are validated with experimental measurements and demonstration of suprathreshold rodent limb excitation through targeted motor cortex activation.Conclusion.The newly developed coils are suitable tools for focal stimulations of the rodent brain due to their smaller stimulation spot size and improved electric field decay rate. | Hedyeh Bagherzadeh Qinglei Meng Hanbing Lu Elliott Hong Yihong Yang Fow-Sen Choa | 2022 | Biomedical Engineering Frontiers2022，3，1： | 0 |
| 10 | Investigation of Phylogenetic Relationship among Three Species of Channa Based on ITS Sequence Analysis显示文摘Objective This study aimed to analyze genetic variation of ribosomal ITS region sequences in Channa argus,C. maculata and C. asiatica,and to investigate the phylogenetic relationship among Channa species based on ITS sequences. Method ITS sequences of three Channa species were amplified by PCR,cloned and assembled to obtain the full length of ITS sequences. Result The full length of ITS sequences of C. argus,C. maculata and C. asiatica was 902,927,and 902 /903 bp,respectively. ITS sequences of C. argus,C. maculata and C. asiatica exhibited higher G + C( 72%) than A + T. Interspecific nucleotide differences were significantly greater than intraspecific differences of these three Channa species. Thus,these remarkably differential ITS fragments could be used to identify C. argus,C. maculata and C. asiatica. Phylogenetic tree constructed by Neighbor-joining and Maximum Likehood methods showed that C. argus shared the lowest genetic distance with C. maculata and the highest genetic distance with C. asiatica. [Conclusion] This study provided reference for classification,identification,phylogenetic analysis and interspecific hybridization of Channa species. | Shuren ZHU Qinglei MENG Yongan ZHU Xirong WANG | 2016 | Agricultural Biotechnology2016，5，1： | 0 |
| 11 | Cobalt-catalyzed atom-economical, diastereo-and enantioselective coupling of aldimines and cyclopropanols显示文摘Catalytic generation of cobalt enolates through ring-opening of easily accessible cyclopropanols, subsequent β-hydride elimination and site-selective reinsertion followed by diastereo-and enantioselective additions to aldimines is presented. Such a process represents an unprecedented reaction pathway of cobalt homoenolates, affording a wide range of β-amino-ketones in up to 95% yield, 90:10 dr and 99:1 er without the need of any stoichiometric amount of additive or reagent. | Zhikun Liang Qinglei Chong Fanke Meng | 2021 | Science China Chemistry2021，64，10： | 0 |
| 12 | Atomically dispersed Fe sites on hierarchically porous carbon nanoplates for oxygen reduction reaction显示文摘Developing cost-effective,robust and stable non-precious metal catalysts for oxygen reduction reaction(ORR) is of paramount importance for electrochemical energy conversion devices such as fuel cells and metal-air batteries.Although Fe-N-C single atom catalysts(SACs) have been hailed as the most promising candidate due to the optimal binding strength of ORR intermediates on the Fe-N_(4) sites,they suffer from serious mass transport limitations as microporous templates/substrates,i.e.,zeolitic imidazolate frameworks(ZIFs),are usually employed to host the active sites.Motivated by this challenge,we herein develop a hydrogen-bonded organic framework(HOF)-assisted pyrolysis strategy to construct hierarchical micro/mesoporous carbon nanoplates for the deposition of atomically dispersed Fe-N_(4) sites.Such a design is accomplished by employing HOF nanoplates assembled from 2-aminoterephthalic acid(NH_(2)-BDC) and p-phenylenediamine(PDA) as both soft templates and C,N precursors.Benefitting from the structural merits inherited from HOF templates,the optimized catalyst(denoted as Fe-N-C SAC-950) displays outstanding ORR activity with a high half-wave potential of 0.895 V(vs.reversible hydrogen electrode(RHE)) and a small overpotential of 356 mV at 10 mA cm^(-2) for the oxygen evolution reaction(OER).More excitingly,its application potential is further verified by delivering superb rechargeability and cycling stability with a nearly unfading charge-discharge gap of 0.72 V after 160 h.Molecular dynamics(MD) simulations reveal that micro/mesoporous structure is conducive to the rapid mass transfer of O_(2),thus enhancing the ORR performance.In situ Raman results further indicate that the conversion of O_(2) to~*O_(2)-the rate-determining step(RDS) for Fe-N-C SAC-950.This work will provide a versatile strategy to construct single atom catalysts with desirable catalytic properties. | Ruixue Zheng Qinglei Meng Hao Zhang Teng Li Di Yang Li Zhang Xiaolong Jia Changpeng Liu Jianbing Zhu Xiaozheng Duan Meiling Xiao Wei Xing | 2024 | Journal of Energy Chemistry2024，90，3： | 0 |
| 13 | A new pathway for formic acid electro-oxidation:The electro-chemically decomposed hydrogen as a reaction intermediate显示文摘Formic acid electro-oxidation reaction(FAOR)is generally believed that follows a two-pathway mechanism.Herein,we resorted to in situ electrochemical mass spectrometry and successfully captured the trace of H_(2),as the new intermediate species,during the process of FAOR on both Pt based catalyst and two single atom catalysts(Rh-N-C and Ir-N-C).Inspired by this,we proposed a new reaction path named hydrogen oxidation pathway:at the oxidation potential,formic acid will break the C–H bond and combine with the protons in the solution to form H_(2) species,then hydrogen oxidation reaction(HOR)will occur to generate two protons.This process is accompanied by electron transfer and contributes currently to the whole reaction. | Xiaolong Yang Qinglei Meng Xian Wang Zhao Jin Changpeng Liu Junjie Ge Wei Xing | 2022 | Journal of Energy Chemistry2022，31，8： | 0 |
| 14 | Revealing the true origin of size-dependent Pd/C catalytic behavior towards formic acid decomposition显示文摘Formic acid decomposition(FAD)is considered a promising hydrogen production route to facilitate the ambient storage and on demand release of hydrogen energy.To optimize the catalysts for FAD,efforts have been paid to explore the underlying reason for the varied catalytic activity among catalysts with similar composition but differed structure.However,such endeavors are highly challenging due to the deeply intermingled effects of electronic structure,particle size,and facets,etc.Herein,to separately evaluate the respective effects of these factors,a series of catalysts with the same surface electronic structure and different particle size was prepared by cation dipole adjustment method.The performance and characterization results showed that the catalysts with different sizes and facets exhibited similar intrinsic activity with deviation of less than 5%.However,they showed 252%deviation of site stability,indicating that only the optimized electronic structure could enhance the intrinsic activity and a smaller particle size could extend the catalyst’s life. | Qinglei Meng Xian Wang Meiling Xiao Zhao Jin Junjie Ge Changpeng Liu Wei Xing | 2023 | Chinese Chemical Letters2023，34，1： | 0 |
| 15 | Fe,Cu-codoped metal-nitrogen-carbon catalysts with high selectivity and stability for the oxygen reduction reaction显示文摘Metal-nitrogen-carbon materials(M-N-C) are non-noble-metal-based alternatives to platinum-based catalysts and have attracted tremendous attention due to their low-cost,high abundance,and efficient catalytic performance towards the oxygen reduction reaction(ORR).Among them,Fe-based materials show remarkable ORR activity,but they are limited by low selectivity and low stability.To address these issues,herein,we have synthesized FeCu-based M-N-C catalysts,inspired by the bimetal center of cytochrome c oxidase(CcO).In acidic media,the selectivity was notably improved compared with Febased materials,with peroxide yields less than 1.2%(<1/3 of the hydrogen peroxide yields of Fe-N-C catalysts).In addition to Cu-N-C catalysts which can catalytically reduce hydrogen peroxide,the reduction current of hydrogen peroxide using FeCu-N-C-20 exceeded that of Fe-N-C by about 6% when the potential was greater than 0.4 V.Furthermore,FeCu-based M-N-C catalysts suffered from only a15 mV attenuation in their half-wave potentials after 10,000 cycles of accelerated degradation tests(ADT),while there was a 30 mV negative shift for Fe-N-C.Therefore,we propose that the H_(2)O_(2) released from Fe-Nx sites or N-doped carbon sites would be reduced by adjacent Cu-Nx sites,re sulting in low H_(2)O_(2) yields and high stability. | Yuemin Wang Ergui Luo Xian Wang Qinglei Meng Junjie Ge Changpeng Liu Wei Xing | 2021 | Chinese Chemical Letters2021，32，1： | 0 |
| 16 | Recent Advances in Stability Improvement Strategies of M-N_(x)/C Catalysts Towards Oxygen Reduction Reaction显示文摘Although fuel cells possess advantages of high energy conversion efficiency and zero-carbon emission,their large-scale commercialization is restricted by expensive and scarce platinum(Pt)catalysts.Metal-nitrogen-carbon(M-Nx/C)catalysts are hailed as the most promising candidates to replace Pt due to their considerable oxygen reduction reaction(ORR)activity and low cost.Despite tremendous progress in terms of active site identification and activity improvement being achieved in the past few decades,the M-Nx/C catalysts still suffer from insufficient durability,which drastically limits their practical application.In this regard,understanding degradation mechanisms and customizing stabilization strategies are of significant importance yet challengeable.In this review,we summarize the recent advances in the stability improvement of M-Nx/C catalysts.The stability test protocols of the M-Nx/C are firstly introduced.Subsequently,with the combination of advanced ex situ and in situ characterization techniques and density functional theory calculation,we present a comprehensive overview of the main degradation mechanisms during ORR process.Aiming at these deactivation issues,a variety of novel improvement strategies are developed to enhance the stability of M-Nx/C.Finally,the current challenges and prospects to design highly stable M-Nx/C catalysts are also proposed. | Xiaolong Jia Qinglei Meng Ruixue Zheng Xiaohui Liu Yaling Zhao Changpeng Liu Meiling Xiao Wei Xing | 2023 | Renewables2023，1，6： | 0 |
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