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Asymmetric Cu Sites for Enhanced CO_(2)Electroreduction to C_(2+)Products

CCS Chemistry 2024年第5期6卷 1231-1239页

作者： Weiwei Guo Xingxing Tan Shunhan Jia Shoujie Liu Xinning Song Xiaodong Ma Limin Wu Lirong Zheng Xiaofu Sun Buxing Han Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and ThermodynamicsCenter for Carbon Neutral ChemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190 Institute of Molecular Metrology College of Chemistry and Chemical EngineeringQingdao UniversityQingdao 266071 School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049 School of Materials Science and Engineering Anhui UniversityHefei 230601 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049 Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062

Cu-based electrocatalysts can have excellent activity for the generation of C_(2+)products from a CO_(2)reduction reaction(CO_(2)RR).Cuδ+species is crucial in tuning the performance of the ***,we discovered that Si-doped Cu catalysts had excellent performance for electrochemical CO_(2)to C_(2+)products.A high Faradaic efficiency(FE)of 84.7%was achieved with a current density of 289mA cm^(−2)in the flow-cell *** situ experimental results showed that the significant reconstruction occurred during the electrolysis,resulting in the formation of the asymmetric Cu sites(Cu^(0)-Cu^(+)).The ratio of Cu^(0)and Cu^(+)could be tuned by changing Si *** experiments and theoretical calculations demonstrated that the asymmetric Cu sites caused by the appropriate Si doping promoted CO_(2)activation and strengthened the adsorption of^(*)CO *** was beneficial to the subsequent^(*)CO–^(*)CO dimerization step,and thus,accounted for the enhancement of C_(2+)selectivity.

关键词： carbon dioxide electrocatalysis asymmetric Cu sites C-C coupling green chemistry

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Bipyridine-Confined Silver Single-Atom Catalysts Facilitate In-Plane C-O Coupling for Propylene Electrooxidation

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Nano Letters 2024年第5期24卷 1801-1807页

作者： Chi, Mingfang Zhao, Jiankang Ke, Jingwen Liu, Yan Wang, Ruyang Wang, Chuanhao Hung, Sung-Fu Lee, Tsung-Ju Geng, Zhigang Zeng, Jie Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Anhui Hefei230026 China School of Chemistry & Chemical Engineering Anhui University of Technology Anhui Ma’anshan243002 China Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu300 Taiwan

The electrooxidation of propylene presents a promising route for the production of 1,2-propylene glycol (PG) under ambient conditions. However, the C-O coupling process remains a challenge owing to the high energy barrier. In this work, we developed a highly efficient electrocatalyst of bipyridine-confined Ag single atoms on UiO-bpy substrates (Ag SAs/UiO-bpy), which exposed two in-plane coordination vacancies during reaction for the co-adsorption of key intermediates. Detailed structure and electronic property analyses demonstrate that CH3CHCH2OH* and *OH could stably co-adsorb in a square planar configuration, which then accelerates the charge transfer between them. The combination of stable co-adsorption and efficient charge transfer facilitates the C-O coupling process, thus significantly lowering its energy barrier. At 2.4 V versus a reversible hydrogen electrode, Ag SAs/UiO-bpy achieved a record-high activity of 61.9 gPG m-2 h-1. Our work not only presents a robust electrocatalyst but also advances a new perspective on catalyst design for propylene electrooxidation. © 2024 American Chemical Society.

关键词： Propylene

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Near-Infrared Light-Activatable Melanized Paclitaxel Nano-Self-Assemblies for Synergistic Anti-tumor Therapy

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Journal of Analysis and Testing 2023年第3期7卷 204-214页

作者： Qiming Zhu Peizhe Li Qiwen Huang Xinpei Ding Nan Wang Weijun Yao Maozhong Miao Zhijun Zhang Key Laboratory of Surface&Interface Science of Polymer Materials of Zhejiang Province School of Chemistry and Chemical EngineeringZhejiang Sci-Tech UniversityHangzhou 310018China Shaoxing Keqiao Research Institute of Zhejiang Sci-Tech University Shaoxing 312000China Shengzhou Innovation Research Institute of Zhejiang Sci-Tech University Shengzhou 312400China

Building self-assembly nanostructures is an important way to overcome the limitations of paclitaxel in tumor ***,this strategy is also faced with challenges,such as difficulties in efficient release and the potential for drug ***,we developed a near-infrared light-activatable melanized paclitaxel self-assembly nanoparticles for synergistic anti-tumor *** this strategy,paclitaxel dimer prodrugs were synthesized and paclitaxel nanoparticles were obtained through ***,the paclitaxel dimer nanoparticles were capped with polydopamine(PDA,melanoidin)and human serum albumin(HSA).The disulfide bonds in paclitaxel dimeric prodrug specifically respond to high concentrations of glutathione(GSH)and reactive oxygen species(ROS)in tumor *** enhances the biocompatibility of the drug molecules and imparts near-infrared photothermal conversion capability to the *** the in vitro and in vivo experiments demonstrated that this paclitaxel nanoprodrug exhibited enhanced tumor therapeutic efficacy under near-infrared light irradiation.

关键词： Paclitaxel nano-self-assemblies Synergistic anti-tumor therapy Photothermal eff ect Melanoidins Nearinfrared light-activatable

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Heat transfer simulation of optogenetics-LED based on microchannel heat dissipation

Heat transfer simulation of optogenetics-LED based on microc...

引用

2024 International Conference on Optoelectronic Information and Computer engineering, OICE 2024

作者： Liu, Lusheng Le, Song Zhang, Yuan Zhang, Jing Wang, Aiping Bin, Jianxiong Niu, Lan Zhang, Lihua Kang, Xiaoyang Laboratory for Neural Interface and Brain Computer Interface Engineering Research Center of AI & Robotics Ministry of Education Shanghai Engineering Research Center of AI & Robotics MOE Frontiers Center for Brain Science State Key Laboratory of Medical Neurobiology Institute of AI and Robotics Academy for Engineering & Technology Fudan University Shanghai200433 China Ji Hua Laboratory Guangdong Province Foshan528200 China Yiwu Research Institute of Fudan University Zhejiang Yiwu City322000 China Research Center for Intelligent Sensing Zhejiang Lab Hangzhou311121 China

ISBN: (纸本)9781510682504

Optogenetics technology has greatly promoted the development of neuroscience. Flexible gene manipulation tools and sensitive light activation methods have provided convenience for neural function research. However, the thermal effect generated in the process of light stimulation affects the activation of neurons by optogenetic technology, which makes the results of light-activated light-sensitive proteins to generate neural currents inaccurate. Here, we established an in vivo activation model of LED-based optogenetic technology through simulation and analyzed the thermal effect produced by it. We propose to use microchannels to dissipate heat from implanted devices, reducing the thermal effect of light stimulation for neural activation. Through simulation, we propose the use of the vortex-like and cobweb-like microchannels for heat dissipation, which can control the temperature rise within 0.28K and 0.31K, respectively. © 2024 SPIE.

关键词： Heat losses

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Size effect of amorphous layers on radiation resistance in Cu/Nb multilayers

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Journal of Materials science & Technology 2024年第30期197卷 25-31页

作者： Zhe Yan Wenfan Yang Jingyu Pang Jiahao Yao Jian Zhang Lixin Yang Shijian Zheng Jian Wang Xiuliang Ma Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjin 300130China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China School of Energy Research Xiamen UniversityXiamen 361005China Mechanical and Materials Engineering University of Nebraska-LincolnLincolnNE 68588USA Bay Area Center for Electron Microscopy Songshan Lake Materials LaboratoryDongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China

In nuclear reactors,the irradiation of metal materials by high-energy particles results in a substantial number of point defects,i.e.,vacancies and interstitials[1-3].High-density accumulation of point defects leads to the formation of defect clusters,including voids,bubbles,and dislocation loops[4-6].These radiation defects contribute to the degradation of structural integrity and perfor-mance,such as hardening,embrittlement,swelling,and surface de-terioration[7-9].Therefore,the regulation and elimination of radi-ation defects have been a long-standing and serious challenge for nuclear materials.

关键词： resistance amorphous swelling

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Graphitic carbon nitride loaded with bismuth nanoparticles displays antibacterial photocatalytic activity

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Rare Metals 2022年第5期41卷 1570-1582页

作者： Hui Zhang Ling Li Qian-Qian Li Tao Ma Jia-Qi Gao Jin-Bo Xue Shuang Gao Department of Plastic Surgery Second Hospital of Shanxi Medical UniversityTaiyuan 030001China Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of TechnologyMinistry of EducationTaiyuan 030024China Department of Materials and Earth Sciences Technical University of DarmstadtDarmstadt 64287Germany

Metal-free graphitic carbon nitride nanomaterials have been widely applied in the medical antibacterial field owing to their high anisotropy, excellent stability,satisfactory biocompatibility, and non-toxicity. Herein, Bi/C_(3)N_(4) nanocomposites were successfully constructed by hydrothermal method followed by loading bismuth on the surface of graphite carbon nitride. Bi nanospheres were tightly combined with the layered g-C_(3)N_(4) surface to promote effective separation of photo-induced charges, which results in the Bi/C_(3)N_(4) composite material that exhibited excellent photocatalytic activity under visible light. In addition, the surface plasmon resonance characteristics of semi-metal Bi further enhanced the visible-light absorption of the Bi/C_(3)N_(4). However, excessive Bi may inhibit the light-trapping ability of Bi/C_(3)N_(4).1.0% Bi/C_(3)N_(4) demonstrates excellent bactericidal efficiency as high as 96.4% against Escherichia coli(E. coli), which is attributed to the promotion of the production of reactive oxidative *** enhanced mechanism of Bi/C_(3)N_(4) synergistically achieving enhanced photocatalytic antibacterial activity under the coupling of multiple advantages was clarified,providing theoretical guidance for its application in the field of water disinfection and antibacterial treatment.

关键词： Carbon nitride Bi nanospheres Schottky barrier ROS Photocatalytic antibacterial

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Two-step Thompson Sampling for Multi-Armed Bandit Problem

Two-step Thompson Sampling for Multi-Armed Bandit Problem

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第43届中国控制会议

作者： Zhigang Shang Lifang Yang Mengmeng Li School of Electrical and Information Engineering Zhengzhou University Henan Key Laboratory of Brain Science and Brain-Computer Interface Technology

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

An important feature of sequential decision-making under uncertain conditions is to strike a balance between exploration(obtaining information about the value of actions) and utilization(selecting the best action based on existing knowledge). The multi-armed bandit is a classic task for balancing their relationship. As the agent has learnt the relationship between two options in a 2-armed bandit task,it will no longer explore but instead use them directly. Inspired by the research, an algorithm based on two-step Thompson sampling(T-TS)is proposed to solve multi-armed bandit problem. First, posterior Beta distributions for the reward of each arm and the probability of the superior arm were established respectively. In the first-step TS, Thompson sampling was used to extract the maximum value from the posterior distribution of probability for the superior arm, determining it as the selected arm. In the two-step TS, Thompson sampling was used to sample from the distributions of the reward. During the updating, the posterior distribution of the probability for the superior arm was updated based on observations including actions and reward, and the distribution of the reward was updated based on the reward feedback. We performed the comparative experiments to solve the static multi-bandit tasks with 10, 20, 40, and 80 arms respectively by the state-of-the-art B-UCB algorithm, Thompson sampling and the proposed T-TS. The results shown that our proposed T-TS can learn the superior action more quickly with the best robustness.

关键词： Thompson sampling multi-armed bandit Beta distribution cumulative regret cumulative reward

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Novel photoelectrochemical immunosensor for MCF-7 cell detection based on n-p organic semiconductor heterojunction

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Chinese Chemical Letters 2022年第6期33卷 2954-2958页

作者： Qin Zeng Qingya Wei Jiarong Luo Yong Qian Minghui Yang Yingping Zou Limin Lu Hunan Provincial Key Laboratory of Micro&Nano Materials Interface Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Institute of Functional Materials and Agricultural Applied Chemistry College of ScienceJiangxi Agricultural UniversityNanchang 330045China Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of TechnologyNanchang 330013China

In this work,we developed a novel photoelectrochemical(PEC)sensor based on n-p organic semiconductor heterojunction for sensitive detecting MCF-7 cancer ***-C4 Ph and PM6 were designed as photoactive materials to form n-p heterojunction,which greatly enhanced the photoelectric conversion ***-modified magnetic nanoparticles were utilized to capture and separate MCF-7 cells from *** of MCF-7 is ascribed to the loading of MCF-7 onto BTA-C4 Ph-PM6 modified electrode that resulted in the decrease of photocurrent *** PEC immunosensor displayed a linear concentration ranging from 50 cell/m L to 1×10^(4) cell/m L with a limit of detection(LOD)of 41 cell/m L(S/N=3)for ***,the senor also exhibited good stability,excellent selectivity and prominent ***,the sensor was successfully applied to detect MCF-7 in whole *** work illustrates that n-p heterojunction of organic semiconductor may find wide applications for the preparation of different photoelectrochemical sensors.

关键词： Photoelectrochemical immunosensor Organic semiconductors n-p Heterojunction MCF-7

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Enhanced photoresponse of Ti0_(2)/MoS_(2)heterostructure phototransistors by the coupling of interface charge transfer and photogating

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Nano Research 2021年第4期14卷 982-991页

作者： Bingxu Liu Yinghui Sun Yonghuang Wu Kai Liu Huanyu Ye Fangtao Li Limeng Zhang Yong Jiang Rongming Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceSchool of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

Two-dimensional(2D)MoS_(2)with appealing physical properties is a promising candidate for next-generation electronic and optoelectronic devices,where the ultrathin MoS_(2)is usually laid on or gated by a dielectric oxide *** oxide/MoS_(2)interfaces widely existing in these devices have significant impacts on the carrier transport of the MoS_(2)channel by diverse interface *** design of the oxide/MoS_(2)interfaces would provide an effective way to break through the performance limit of the 2D devices but has yet been well ***,we report a high-performance MoS_(2)-based phototransistor with an enhanced photoresponse by interfacing few-layer MoS_(2)with an ultrathin Ti0_(2)*** Ti0_(2)is deposited on MoS_(2)through the oxidation of an e-beam-evaporated ultrathin Ti *** a visible-light illumination,the fabricated Ti0_(2)/MoS_(2)phototransistor exhibits a responsivity of up to 2,199 A/W at a gate voltage of 60 V and a detectivity of up to 1.67×10^(13)Jones at a zero-gate voltage under a power density of 23.2μW/mm^(2).These values are 4.0 and 4.2 times those of the pure MoS_(2)*** significantly enhanced photoresponse of Ti0_(2)/MoS_(2)device can be attributed to both interface charge transfer and photogating *** results not only provide valuable insights into the interactions at Ti0_(2)/MoS_(2)interface,but also may inspire new approach to develop other novel optoelectronic devices based on 2D layered materials.

关键词： MoS_(2) heterojunction photodetector charge injection photocurrent

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Depth-optimized quantum circuit synthesis for diagonal unitary operators with asymptotically optimal gate count

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Physical Review A 2024年第4期109卷 042601-042601页

作者： Shihao Zhang Kai Huang Lvzhou Li School of Computer Science and Engineering Sun Yat-sen University Guangzhou 510006 China Hebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface School of Science Hebei University of Science and Technology Shijiazhuang 050018 China

Diagonal unitary operators are well known to be key building blocks of many quantum algorithms and quantum computing procedures, and thus resource-efficient quantum circuit implementations are in demand. Here we propose a constructive algorithm that can generate a quantum circuit over the primitive gate set {cnot, RZ} for realizing any given diagonal unitary operator piece by piece. The theoretical analysis reveals that, for the general case, our generated circuit not only ensures the asymptotically optimal gate count, but also nearly halves the circuit depth compared with the previous Welch's method [New J. Phys. 16, 033040 (2014)]. Specifically, this substantial depth optimization originates from the use of a uniform circuit rewriting rule developed here. The performance of our circuit synthesis algorithm is further validated by numerical evaluations on two examples. First, we achieve a nearly 50% depth reduction over Welch's method for synthesizing random diagonal unitary operators with up to 16 qubits. Second, we achieve an average of 22.05% depth reduction for resynthesizing the diagonal part of the specific quantum approximate optimization algorithm (QAOA) circuits with up to 14 qubits.

关键词： Quantum algorithms Quantum circuits

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