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Mo-doped one-dimensional needle-like Ni_(3)S_(2) as bifunctional electrocatalyst for efficient alkaline hydrogen evolution and overall-water-splitting

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ChemPhysMater 2024年第1期3卷 74-82页

作者： Junjie Huang yupeng xing Jinzhao Huang Fei Li Gang Zhao xingmin Yu Binxun Li Xinran Zhang School of Physics and Technology University of JinanJinan 250022China

Hydrogen energy plays an important role in clean energy system and is considered the core energy source for future technological development owing to its lightweight nature,high calorific value,and clean combustion *** electrocatalytic conversion of water into hydrogen is considered a highly promising *** electrocatalyst is indispensable in the electrocatalytic process,and finding an efficient electrocatalyst is ***,the current commercial electrocatalysts(such as Pt/C and Ru)are expensive;therefore,there is a need to find an inexpensive and efficient electrocatalyst with high stability,corrosion resistance,and high electrocatalytic *** this study,we developed a cost-effective bifunctional electrocatalyst by incorporating molybdenum into nickel sulfide(Ni_(3)S_(2))and subsequently tailoring its structure to achieve a one-dimensional(1D)needle-like *** hydrogen production efficiency of nickel sulfide was improved by changing the ratio of Mo *** analyzing the electrochemical performance of different Mo-doped catalysts,we found that the Ni_(3)S_(2)-Mo-0.1 electrocatalyst exhibited the best electrocatalytic effect in 1 M KOH;at a current density of 10 mA cm^(-2),it exhibited overpotentials of 120 and 279 mV for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER),respectively;at a higher current density of 100 mA cm^(-2),the HER and OER overpotentials were 396 and 495 mV,***,this electrocatalyst can be used in a two-electrode water-splitting ***,we thoroughly investigated the mechanism of the overall water splitting of this electrocatalyst,providing valuable insights for future hydrogen production via overall-water-splitting.

关键词： Hydrogen evolution reaction Molybdenum doped Nickel sulfide Overall water splitting Needle-like multistage structure

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以STM32为控制器的物流核心设备设计

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昆明冶金高等专科学校学报 2024年第4期40卷 64-70页

作者：邢宇鹏邓晶蒋琼谢颖云南昆船电子设备有限公司云南昆明650236 昆明冶金高等专科学校商学院云南昆明650033

物流输送线上设备分为核心设备与普通设备,每一个输送链路均由一台核心设备与多台普通设备构成。现阶段工业生产是多元化的,因客户及产品变更需要,物流输送线需要频繁变更。核心设备担负着物流输送线去中心化的责任,使生产线重新搭建更... 详细信息

物流输送线上设备分为核心设备与普通设备,每一个输送链路均由一台核心设备与多台普通设备构成。现阶段工业生产是多元化的,因客户及产品变更需要,物流输送线需要频繁变更。核心设备担负着物流输送线去中心化的责任,使生产线重新搭建更为柔性化。为此开展了以STM32F407VET6为控制器的核心设备的设计,实际使用证明产品达到了预定的目标,实现了生产线搭建柔性化的要求。

关键词： STM32控制器物流输送线核心设备

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Rational construction of phosphate layer to optimize Cu-regulated Fe_(3)O_(4) as anode material with promoted energy storage performance for rechargeable Ni-Fe batteries

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Journal of Materials Science & Technology 2022年第13期108卷 133-141页

作者： Shuhua Hao yupeng xing Peiyu Hou Gang Zhao Jinzhao Huang Shipeng Qiu Xijin Xu Laboratory of Functional Micro and Nano Materials and Devices School of Physics and TechnologyUniversity of JinanJinan 250024China

Flexible aqueous energy storage devices with high security and flexibility are crucial for the progress of wearable energy ***,aqueous rechargeable Ni-Fe batteries owning a large theoretical capacity,low cost and outstanding safety characteristics have emerged as a promising candidate for flexible aqueous energy storage ***,Cu-doped Fe_(3)O_(4)(CFO)with 3D coral structure was prepared by doping Cu^(2+) based on Fe_(3)O_(4)nanosheets(FO).Furthermore,the Fe-based anode material(CFPO)grown on carbon fibers was obtained by reconstructing the surface of CFO to form a low-crystallization shell which can enhance the ion ***,the newly developed CFPO electrode as an innovative anode material further exhibited a high capacity of 117.5 mAh g^(-1)(or 423 F g^(-1))at 1 A g^(-1).Then,the assembled aqueous Ni-Fe batteries with a high cell-voltage output of 1.6 V deliver a high capacity of 49.02 mAh g^(-1) at 1 A g^(-1) and retention ratio of 96.8%for capacitance after 10000 continuous ***’s more,the aqueous quasi-solid-state batteries present a remarkable maximal energy density of 45.6 Wh kg^(-1) and a power density of 12 kW kg^(-1).This work provides an innovative and feasible way and optimization idea for the design of high-performance Fe-based anodes,and may promote the development of a new generation of flexible aqueous Ni-Fe batteries.

关键词： Ni-Fe batteries High voltage window regulation High energy and power density Anode materials Amorphous phosphate layer

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Interfacial coupling of sea urchin-like(Mo4O11-MoS2-VO_(2)) promoted electron redistributions for significantly boosted hydrogen evolution reaction

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Chinese Chemical Letters 2023年第4期34卷 368-373页

作者： yupeng xing Na Li Shipeng Qiu Gang Zhao Shuhua Hao Baojie Zhang Laboratory of Functional Micro-nano Materials and Devices School of Physics and TechnologyUniversity of JinanJi’nan 250022China

Developing efficient electrocatalysts for hydrogen evolution reaction(HER) is of great importance in contemporary water electrolysis technology. Here, a novel hierarchically sea urchin-like electrocatalyst(Mo_(4)O_(11)-MoS_(2)-VO_(2)) is synthesized by hydrothermal deposition and post-annealing strategy. The optimized electrocatalyst behaves as a high active hydrogen evolution electrode in 0.5 mol/L H_(2)SO_(4). This electrode needs overpotential of only 43 m V to achieve 10 m A/cm^(2)with a Tafel slope of 37 m V/dec and maintains its catalytic activity for at least 36 h. Better than most previously reported non-noble metal electrocatalysts anchored on carbon cloth. It is worth mentioning that the hierarchical sea urchin-like structure promotes the redistribution of electrons and provides more catalytic active sites. This strategy shows a way for the construction of inexpensive non-noble metal electrocatalysts in the future.

关键词： Non-noble metal Hierarchical sea urchin-like (Mo4O11-MoS2-VO_(2)) Interfacial coupling Electron redistribution HER

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Why the hydrothermal fluorinated method can improve photocatalytic activity of carbon nitride

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Chinese Chemical Letters 2021年第1期32卷 277-281页

作者： Gang Zhao yupeng xing Shuhua Hao Xijin Xu Wenxuan Ma Jinghua Guo Laboratory of Functional Micro and Nano Materials and Devices School of Physics and TechnologyUniversity of JinanJi’nan 250022China

Carbon nitride(CN) photocatalysts have attracted much attention due to their excellent photocatalytic *** hydrothermal fluorination is a common method to improve the photocatalytic effect of CN ***,the influence of the band gap was first revealed of fluorination and hydroxylation of CN photocatalyst based on the first theoretical ***,the effect of fluorination and hydroxylation on the CN band gap was discussed for the first time using the first theoretical *** F atoms and OH doping,the band gap of CN was significantly improved,conduction band and valence band moved ***,F-CN photocatalyst with F atoms and OH was successfully synthesized by a hydrothermal fluorinated ***,the reasons why F-CN photocatalyst was more effective than that of traditional CN photocatalyst were fully *** the photocatalytic effect of photocatalyst(12,593.2 μmolg^(-1) h^(-1)to the morphology(super-small nanosheets),structure(homojunctions),composition(metal-free),specific surface area(54.1 m^(2)/g),visible light absorption response(AQE is10.9% at 420 nm) and photo-induced carrier life(14.13 ns).Therefore,this work has a great guiding effect on the development of CN photocatalyst.

关键词： Carbon nitride Band gap Density-functional theory(DFT) Fluorination and hydroxylation Reasons Time-resolved photoluminescence spectra

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Exploring the growth mechanism of CuSbSe_(2)thin film prepared by electrodeposition

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Optoelectronics Letters 2023年第9期19卷 532-540页

作者： WANG Ruihu BI Jinlian LI Wei YUAN Yujie xing yupeng YAO Liyong Tianjin Key Laboratory of Film Electronic and Communication Devices School of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Institute of Power Source Tianjin 300384China

Copper antimony selenium(CuSbSe_(2))has advantages of adjustable band gaps from 1.09 eV to 1.2 eV,high light absorption coefficient(>105 cm-1),and low grain generation temperature(300—400℃),which is suitable for the preparation of solar ***,the stable range of CuSbSe_(2)(CASe)phase is narrow,which is inevitable to form Sb_(2)Se_(3)and Cu_(3)SbSe_(4)second phase during the preparation *** this work,selenization annealing of Sb/Cu metal layer to prepare CASe thin films with pulse electrodeposition process was studied,and the growth mechanism of CASe film was *** and Sb reacted with Se to form Cu_(2)Se and Sb_(2)Se_(3),*** Cu_(2)Se and Sb_(2)Se_(3)further reacted to generate *** the formation temperature of Cu_(3)SbSe_(4)was lower than that of CASe,the preferential formation of Cu_(3)SbSe_(4)led to layer *** the annealing temperature was too high,CASe decomposed to form Cu_(3)SbSe_(3)and Sb_(2)Se_(3).Additionally,by increasing the heating rate,the separation of CASe thin films was effectively improved,and the CASe thin films with relatively high crystallinity were obtained at 360℃with heating rate of 30℃/min and selenization time of 20 min.

关键词： Exploring the growth mechanism of CuSbSe_(2)thin film prepared by electrodeposition

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Recent advances in the improvement of g-C_(3)N_(4) based photocatalytic materials

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Chinese Chemical Letters 2021年第1期32卷 13-20页

作者： yupeng xing Xiaoke Wang Shuhua Hao Xueli Zhang Xiao Wang Wenxuan Ma Gang Zhao Xijin Xu School of Physics and Technology University of JinanJi’nan 250022China

g-C_(3)N_(4) have been widely used in the fields of photocatalytic hydrogen production,photocatalytic degradation of dyes and oxidative degradation of toxic gases due to their excellent *** has attracted extensive attention in recent years due to its highly efficient photocatalytic capacity of hydrogen generation,water oxidation,carbon dioxide reduction and degradation of organic *** of the abundant carbon and nitrogen composition of the earth,large-scale production and industrial applications of this material are *** modification of this material makes its performance more excellent so that this new material can obtain a steady stream of *** outstanding works have become important materials and milestones on the road to mankind's photocatalytic hydrogen *** review will begin with the basic idea of designing,synthesizing and improving g-C_(3)N_(4) based photocatalytic materials,and introduce the latest development of g-C_(3)N_(4) photocatalysts in hydrogen production from four aspects of controlling the carbon/nitrogen ratio,morphology,element doping and heterojunction structure of g-C_(3)N_(4) materials.

关键词： Carbon nitride Modification Enhancement Photocatalyst Hydrogen evolution reaction

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Amorphous nickel borate nanosheets as cathode material with high capacity and better cycling performance for zinc ion battery

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Chinese Chemical Letters 2023年第6期34卷 517-520页

作者： Na Li Xixi Zhang Shunshun Zhao Chuanlin Li Xiaojuan Li Tongkai Wang yupeng xing Gangmeng Qu Xijin Xu School of Physics and Technology University of JinanJi’nan 250022China School of Electronic and Information Engineering(Department of Physics) Qilu University of Technology(Shandong Academy of Sciences)Ji’nan 250353China

Zinc-ion batteries are under current research focus because of their uniqueness in low cost and high ***,the pursuing of high-performance cathode materials of aqueous Zinc ion batteries(AZBs)with low cost,high energy density and long cycle life has become the key problem to be *** we synthesized a series of amorphous nickel borate(AM-NiBO)nanosheets by varying corrosion time with in-situ electrochemical corrosion *** AM-NiBO-T13 as electrode material possesses a high areal capacity of 0.65 m Ah/cm^(2) with the capacity retention of 95.1%after 2000 *** addition,the assembled AM-NiBO-T13//Zn provides high energy density(0.77 m Wh/cm^(2) at 1.76 m W/cm^(2)).The high areal capacity and better cycling performance can be owing to the amorphous nanosheets structure and the stable coordination characteristics of boron and oxygen in borate *** shows that amorphous nickel borate nanosheets have great prospects in the field of energy storage.

关键词： Amorphous Nickel borate Nanosheets structure Alkaline Aqueous zinc ion battery

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Analysis of effects of front and back surface dopants on silicon vertical multi-junction solar cell by 2D numerical simulation

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Science China(Technological Sciences) 2013年第11期56卷 2798-2807页

作者： xing yupeng HAN PeiDe WANG Shuai LIANG Peng LOU ShiShu ZHANG YuanBo HU ShaoXu ZHU HuiShi MI YanHong ZHAO ChunHua State Key Lab on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of Sciences

The silicon vertical multi-junction （VMJ） solar cell has a good potential in high concentration, but it requires high quality front and back surface passivation layers to keep its high efficiency. We try to add dopants into the front and back surfaces of the VMJ cell to release this strict requirement in this work. The effects of recombination velocities, doping types and doping pro- files of front and back surfaces on the performance of the P-type VMJ cell were calculated under 1 sun and 1000 suns. The 2D numerical simulation tool TCAD software was used. The performance of the VMJ cell without front and back surface dopants was also calculated for comparison. It was found that the requirement of high quality front and back surface passivation layers could be released remarkably by adding either N-type or W-type front and back surface dopants. For the two types of front surface dopants, the highest efficiencies of the cells were got by light dopant; for the two types of back surface dopants, the doping type and profile affected little on the performance of the cell in our calculation range. It was also found that the series resistance of the VMJ cell with N-type front surface dopant was decreased by the 2D effect of front surface emitter. The VMJ cell with W-type front surface dopant had the highest efficiency under 1000 suns and the VMJ cell with N-type front surface dopant had the highest efficiency under 1 sun in our calculation range.

关键词： vertical junction concentration 2D numerical simulation doping profile

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单频调制的相位调制激光在频率损失下激发的幅频效应

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光通信技术 2024年第4期48卷 31-35页

作者：韦佳天金奇黎志刚李晓晖吕宏伟杨万里邢宇鹏杨小亮中国电子科技集团公司第三十四研究所广西桂林541004

鉴于当前对幅频效应的研究主要局限于从时域角度关注脉冲顶部调制,无法全面揭示其在频域或其它维度上的特性,从单频激光相位调制模型出发,结合理论仿真和实验验证,从波形强度调制度、激发的幅度调制信号强度和频谱分布变化等角度,研究... 详细信息

鉴于当前对幅频效应的研究主要局限于从时域角度关注脉冲顶部调制,无法全面揭示其在频域或其它维度上的特性,从单频激光相位调制模型出发,结合理论仿真和实验验证,从波形强度调制度、激发的幅度调制信号强度和频谱分布变化等角度,研究了单阶次频率损失、整体频率损失以及调制深度变化对幅频效应激发的影响。研究结果表明,随着相位调制激光偏离滤波器中心位置距离增大,波形强度调制度随之增强,但激发的调制信号强度则呈现先上升后下降的趋势;与单阶次频率损失相比,整体频率损失所激发的幅频效应中,调制信号主要集中在基频和二次谐波上;此外,调制深度的增加会导致光谱宽度增大以及激发的调制信号强度增强。

关键词：幅频效应相位调制激光滤波

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