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Paired formate and H_(2) productions via efficient bifunctional Ni-Mo nitride nanowire electrocatalysts

Journal of Energy Chemistry 2022年第9期31卷 432-441,I0012页

作者： Xuan Liu Zhongying Fang Xue Teng Yanli Niu Shuaiqi Gong Wei Chen Thomas JMeyer Zuofeng Chen shanghai Key Lab of Chemical Assessment and Sustainability School of Chemical Science and EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina Department of Chemistry University of North Carolina at Chapel HillChapel HillNC 27599United States

Electrocatalytic water splitting provides a potentially sustainable approach for hydrogen production,but is typically restrained by kinetically slow anodic oxygen evolution reaction(OER)which is of lesser ***,free-standing,hetero-structured Ni_(3)N-Ni_(0.2)Mo_(0.8)N nanowire arrays are prepared on carbon cloth(CC)electrodes for hydrogen evolution reaction(HER)and glycerol oxidation reaction(GOR)to formate with a remarkably high Faradaic efficiency of 96%.A two-electrode electrolyzer for GOR-assisted hydrogen production operates with a current density of 10 mA cm^(-2)at an applied cell voltage of 1.40 V,220 mV lower than for alkaline water ***-situ Raman measurements identify Ni(Ⅲ)as the active form of the catalyst for GOR rather than Ni(IV)and in-situ Fourier transform infrared(FTIR)spectroscopy measurements reveal pathways for GOR to *** density functional theory(DFT)calculations,the Ni_(3)N-Ni_(0.2)Mo_(0.8)N heterostructure is beneficial for optimizing adsorption energies of reagents and intermediates and for promoting HER and GOR activities by charge redistribution across the *** same electrode also catalyzes conversion of ethylene glycol from polyethylene terephthalate(PET)plastic hydrolysate into *** combined results show that electrolytic H_(2) and formate production from alkaline glycerol and ethylene glycol solutions provide a promising strategy as a cost-effective energy supply.

关键词： Transition metal nitrides Heterostructures Hydrogen evolution reaction Glycerol and ethylene glycol oxidation Formic acid

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Power amplifier for 1064 nm using Yb^(3+)-doped double-clad fiber

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Chinese Optics Letters 2004年第2期2卷 98-99页

作者：孔令峰楼祺洪周军吴中林董景星魏运荣朱健强王之江 shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800

A master-oscillator fiber power amplifier (MOPA) system is presented, which consists of a single mode laser as the master oscillator and an Yb3+-doped large-mode-area double-clad fiber as the power amplifier. The system emits up to 6 W of amplified radiation at a wavelength of 1064 nm. The slope efficiency and extracted pulse energy as a function of pulse repetition rate are analyzed.

关键词： Optical fibers Solid state lasers

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Fabrication of porous lithium titanate self-supporting anode for high performance lithium-ion capacitor

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Journal of Energy Chemistry 2020年第11期29卷 344-350页

作者： Yan Liu Wenqiang Wang Jin Chen Xingwei Li Qilin Cheng Gengchao Wang shanghai Engineering Research Center of Hierarchical Nanomaterials Shanghai Key Laboratory of Advanced Polymeric MaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Lithium titanate has unique "zero-strain" characteristics, which makes it promising for rapid energy storage lithium-ion capacitors. However, extremely low electronic conductivity and lithium ion diffusion coefficient severely limit its performance at high rate. Herein, we have constructed in situ clusters of porous lithium titanate nanoparticles on self-supporting carbon nanotube film by combining iron oxide hard template method and F127 soft template method. Due to the nano-structured particle size and the penetrating lithium ion transmission channel, a greatly improved lithium ion diffusion coefficient has been achieved, which brings significantly better electrochemical performance than dense lithium titanate. By assembling with a durable graphene foam cathode, a lithium-ion capacitor with an energy density of up to 101.8 Wh kg-1 was realized(at a power density of 436.1 W kg-1). And its capacitance retention reaches 84.8% after 5000 cycles. With such an alluring result, our work presents a novel lithium-ion capacitor system with practical application prospects.

关键词： Lithium titanate Graphene foam Ion transmission Hybrid capacitor

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50-watt ytterbium-doped double-clad fiber laser

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Chinese Optics Letters 2003年第10期1卷 559-560页

作者：楼祺洪周军朱健强吴中林孔令峰董景星叶震寰魏运荣王之江 shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800

A ytterbium-doped double-clad fiber laser with more than 50-W output, near diffraction-limited is demonstrated in SIOM. The optical-to-optical efficiency is about 44% with respect to incident pump power and the slope ... 详细信息

关键词： Pumping (laser) Ytterbium compounds

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Upcycling PET in parallel with energy-saving H_(2)production via bifunctional nickel-cobalt nitride nanosheets

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Nano Research 2023年第4期16卷 4625-4633页

作者： Xuan Liu Zhongying Fang Dengke Xiong Shuaiqi Gong Yanli Niu Wei Chen Zuofeng Chen shanghai Key Lab of Chemical Assessment and Sustainability School of Chemical Science and EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

We describe here an electro-reforming strategy to upcycle polyethylene terephthalate(PET)waste with simultaneous hydrogen production by a bifunctional nickel-cobalt nitride nanosheets *** plastics are digested in alkaline solution giving an electrochemically active monomer ethylene glycol(EG).The introduction of Co in Co-Ni3N/carbon cloth(CC)promotes the redox behavior of Ni2+/Ni3+,which is beneficial for EG oxidation at an ultra-low potential(1.15 V *** hydrogen electrode(RHE))and breaks through the limitation of high catalytic potentials of simple Ni-based electrocatalysts(1.30 V).In PET hydrolysate with Co-Ni3N/CC couples,an integrated EG oxidation-hydrogen production system achieves a current density of 50 mA·cm^(−2)at a cell voltage of 1.46 V,which is 370 mV lower than the conventional water *** in-situ Raman and Fourier transform infrared(FTIR)spectroscopies and density functional theory(DFT)calculations identify the catalytic mechanism and point to advantages of heterostructure engineering in optimizing adsorption energies and promoting catalytic activities for EG oxidation.

关键词： nickel-cobalt nitride hydrogen evolution reaction polyethylene terephthalate upcycling ethylene glycol oxidation formic acid

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Synthesis and application of an IL-supported diol as protecting group for aldehydes

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Chinese Chemical Letters 2007年第10期18卷 1205-1208页

作者： Yue Qin Cai Ye Liu Guo Hua Gao shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal University Shanghai 200062 China

A new IL-supported diol, 1-（2,3-dihydroxypropyl）-3-methylimidazolium hexafluorophosphate has been synthesized and characterized by Fr-IR, ^1H NMR, ^13C NMR and MS （ESI）. Its physical properties such as freezing point, solubility and specific gravity and thermal stability were determined. Synthetic utilities of the resultant diol as a protecting group for aldehydes were also investigated.

关键词： IL-supported diol Preparation Characterization Protecting group

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IMPROVED STABILITY CRITERIA FOR UNCERTAIN LINEAR SYSTEMS WITH INTERVAL TIME-VARYING DELAY

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Journal of Systems science & Complexity 2013年第2期26卷 175-186页

作者： ZHENG Min XIAO Wei CHEN Qinghai College of Mechatronic Engineering and Automation Shanghai UniversityShanghai Key Laboratory of Power Station Automation Technology

This paper deals with the robust stability analysis of dynamic systems with interval time- varying delay and uncertainties. The innovation of the method includes employment of a tighter integral inequality and construction of an appropriate type of Lyapunov functional. The stability criteria derived from this method have less conservatism than some existing ones. Numerical examples are given to illustrate the effectiveness of the orooosed method.

关键词： Integral inequality robust stability time-delayed systems varying delay-decomposingLKF.

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EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION OF LASER SHOCK FORMING OF TA2 TITANIUM SHEET

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Acta Metallurgica Sinica(English Letters) 2006年第5期19卷 347-354页

作者： F. Wang Z. Q. Yao J. Hu Q.L. Deng School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200030 China

Laser shock forming （ISF） was a new technique realized by applying an impulsive pressure generated by laser-induced shock wave on the surface of metal sheet. LSF of metal sheet was investigated with experiments and numerical simulation. The basic theories were introduced; the surface quality and deformation of the processed titanium sample （TA2） were examined; ABAQUS was used to simulate ISF and the central displacement of the shocked region was measured and compared with the simulation. Overlapped ISF treatment was experimentally carried out to produce groove and simulation. The results showed that the surface quality and the microstructure with single laser pulse had no remarkable change, and ablation was observed on the surface of the sample with overlapped pulses. The deformation observed in the numerical simulation agreeed with that observed in the experimental measurement quite well.

关键词： laser shock forming numerical simulation surface quality deformation

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Deliberative Collision Avoidance for Unmanned Surface Vehicle Based on the Directional Weight

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Journal of shanghai Jiaotong university(science) 2016年第3期21卷 307-312页

作者：吴恭兴史旦达郭佳民 College of Ocean science and Engineering Shanghai Maritime UniversityShanghai 201306China

The purpose of this study is to realize the intelligent deliberative obstacle avoidance for unmanned surface vehicle(USV), based on the International Regulations for Preventing Collisions at Sea called ***, a three-level system architecture is designed for the ship intelligent collision avoidance system. Secondly,an intelligent collision avoidance algorithm is presented based on the calculation of motion parameters and the rules of COLREGS. Thirdly, according to COLREGS, the marine environment is modeled from the electronic chart data and radar information, and a deliberative collision avoidance algorithm is written. Finally, the deliberative collision avoidance simulation is carried out for the USV. The feasibility and reliability of intelligent collision avoidance algorithm are verified by the vivid simulation results.

关键词： ship collision avoidance deliberative collision avoidance architecture visual simulation

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Applications of electrohydrodynamics and Joule heating effects in microfluidic chips:A review

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science China(Technological sciences) 2009年第12期52卷 3477-3490页

作者： CAO Jun CHENG Ping HONG FangJun Ministry of Education Key Laboratory of Power and Machinery Shanghai Jiao Tong UniversityShanghai 200240China

This review article presents an overview on the application of electrohydrodynamics and Joule heating effects in microfluidic chips.A brief introduction of microfluidic chips and a classification of electrohydrodynamics as well as the applications in microfluidic devices are first *** basic theories and governing equations of classical electromagnetics are summarized and electroviscous effects in pressure driven flows in a microchannel are *** and applications of DC electrokinetics,including DC electroosmotic flow,DC electrophoresis,as well as principles of AC electrokinetics,including AC electroosmotic flow and dielectrophoresis are also ***,Joule heating effects in both DC and AC electrokinetics,especially the newly discovered electrothermal flow,are summaried.

关键词： electrohydrodynamics microfluidics electrokinetics Joule heating effect AC electroosmosis dielectrophoresis electrothermal flow

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