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The component-activity interrelationship of cobalt-based bifunctional electrocatalysts for overall water splitting:Strategies and performance

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Journal of Energy Chemistry 2024年第4期91卷 453-474页

作者： mingjie sun Riyue Ge Sean Li Liming Dai Yiran Li Bin Liu Wenxian Li School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong Kong SAR 999077China School of Materials Science and Engineering University of New South WalesSydneyNew South Wales 2052Australia UNSW Materials&Manufacturing Futures Institute UNSW SydneyNew South Wales 2052Australia School of Chemical Engineering University of New South WalesSydneyNew South Wales 2052Australia

Cobalt-based electrocatalysts take advantage of potentially harmonizable microstructure and flexible coupling effects compared to commercial noble metal-based catalytic materials.However,conventional water electrolysis systems based on cobalt-based monofunctional hydrogen evolution reaction(HER)or oxygen evolution reaction(OER)catalysts have certain shortcomings in terms of resource utilization and universality.In contrast,cobalt-based bifunctional catalysts(CBCs)have attracted much attention in recent years for overall water splitting systems because of their practicality and reduced preparation cost of electrolyzer.This review aims to address the latest development in CBCs for total hydrolysis.The main modification strategies of CBCs are systematically classified in water electrolysis to provide an overview of how to regulate their morphology and electronic configuration.Then,the catalytic performance of CBCs in total-hydrolysis is summarized according to the types of cobalt-based phosphides,sulfides and oxides,and the mechanism of strengthened electrocatalytic ability is emphasized through combining experiments and theoretical calculations.Future efforts are finally suggested to focus on exploring the dynamic conversion of reaction intermediates and building near-industrial CBCs,designing advanced CBC materials through micro-modulation,and addressing commercial applications.

关键词： Cobalt Bifunctional electrocatalysis Water splitting Modification strategies Electrocatalytic performances

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Continuous preparation of strong and tough PVA nanocomposite fibers by mechanical stretching-assisted salting-out treatment

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Nano Research 2024年第4期17卷 3156-3163页

作者： Hang Chen Guangze Yang Yingzhi sun Yichao Xu mingjie Liu Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China Research Institute for Frontier Science Beihang UniversityBeijing 100191China International Research Institute for Multidisciplinary Science Beihang UniversityBeijing 100191China

Polymer composite fibers with superior properties such as excellent combined strength and toughness and biocompatibility can be used in high-tech applications of braided protective devices and smart wearable,however the research of high-performance polymer composite fiber remains in the infant stage.Here we present a strategy to produce strong and tough anisotropic polymer nanocomposite fibers with orientedly aligned salt rods using mechanical stretching-assisted salting-out treatment.The prepared nanocomposite fibers have a tensile strength of up to 786±2.7 MPa and an elongation at break of 81%,and the anisotropic fibers exhibit good transmission of mechanical vibration in the longitudinal direction with high resolution.During the fabrication process,the salt builds up into oriented rods during the directional salting process,and the polymer is confined to the 150 nm domain between the rods after the solvent is completely evaporated,giving the nanocomposite fibers superior mechanical properties.The presented strategy can be applied to the continuous mass production of nanocomposite fibers and is also generalizable to other polymer nanocomposites,which could extend the applicability of nanocomposite fibers to conditions involving more demanding mechanical loading and mechanical vibration transmission.

关键词： poly(vinyl alcohol)(PVA)nanofibers oriented structure ultrastrong and stiff mechanical vibration transmission salting out continuous production

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Large-area ultrastrong and stiff aramid nanofiber based layered nanocomposite films

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Nano Research 2024年第2期17卷 829-835页

作者： Zhidong Nie Yingzhi sun Tianxu Zhou Shengwen Kong Linxing Liu Chuangqi Zhao mingjie Liu Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China University of Science and Technology of China Hefei 230026China Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China International Research Institute for Multidisciplinary Science Beihang UniversityBeijing 100191China

One-dimensional(1D)aramid nanofiber(ANF)based nanocomposite films have drawn increasing attentions in various applications due to their excellent mechanical properties and impressive chemical and thermal stabilities.However,the large-area fabrication of aramid nanocomposite films with ultrastrong mechanical properties under mild conditions remains a great challenge.Here we present a facile superspreading-assisted strategy to produce aramid nanofiber based oriented layered nanocomposites using phase inversion process that occurs at the fully swollen hydrogel surfaces.The nanocomposite films based on ANF,carboxylation carbon tube(CNT–COOH),poly(vinyl alcohol)(PVA),and MXene nanosheet exhibit a tensile strength of up to 870.8±85 MPa,a Young’s modulus of 21.8±2.2 GPa,and outstanding toughness(up to 43.2±4.6 MJ/m^(3)),which are much better than those conventional aramid nanofiber based materials.Electrical conductivity of our nanocomposite films reaches the maximum of about 1100 S/m.The fabulous mechanical properties combination and continuous production capability render our strategy representing a promising direction for the development of high-performance nanocomposites.

关键词： aramid nanofibers MXene nanosheets nanocomposites ultrastrong and stiff superspreading large-area production

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Flow characteristics and hot workability of a typical low-alloy high-strength steel during multi-pass deformation

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 323-336页

作者： mingjie Zhao Lihong Jiang Changmin Li Liang Huang Chaoyuan sun Jianjun Li Zhenghua Guo School of Aeronautical Manufacturing Engineering Nanchang Hangkong UniversityNanchang 330063China Jiangxi Key Laboratory of Forming and Joining Technology for Aerospace Components Nanchang Hangkong UniversityNanchang 330063China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China China National Erzhong Group Deyang Wanhang Die Forging Co.LTD. Deyang 618000China Hubei Huangshi Mold Industrial Technology Research Institute Huangshi 435007China

Heavy components of low-alloy high-strength(LAHS) steels are generally formed by multi-pass forging. It is necessary to explore the flow characteristics and hot workability of LAHS steels during the multi-pass forging process, which is beneficial to the formulation of actual processing parameters. In the study, the multi-pass hot compression experiments of a typical LAHS steel are carried out at a wide range of deformation temperatures and strain rates. It is found that the work hardening rate of the experimental material depends on deformation parameters and deformation passes, which is ascribed to the impacts of static and dynamic softening behaviors. A new model is established to describe the flow characteristics at various deformation passes. Compared to the classical Arrhenius model and modified Zerilli and Armstrong model, the newly proposed model shows higher prediction accuracy with a confidence level of 0.98565. Furthermore, the connection between power dissipation efficiency(PDE) and deformation parameters is revealed by analyzing the microstructures. The PDE cannot be utilized to reflect the efficiency of energy dissipation for microstructure evolution during the entire deformation process, but only to assess the efficiency of energy dissipation for microstructure evolution in a specific deformation parameter state.As a result, an integrated processing map is proposed to better study the hot workability of the LAHS steel, which considers the effects of instability factor(IF), PDE, and distribution and size of grains. The optimized processing parameters for the multi-pass deformation process are the deformation parameters of 1223–1318 K and 0.01–0.08 s^(-1). Complete dynamic recrystallization occurs within the optimized processing parameters with an average grain size of 18.36–42.3 μm. This study will guide the optimization of the forging process of heavy components.

关键词： low-alloy high-strength steel work hardening rate constitutive model hot workability multi-pass deformation

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Roles of cancer-associated fibroblast functional heterogeneity in shaping the lymphatic metastatic landscape:new insights and therapeutic strategies

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Cancer Biology & Medicine 2024年第6期21卷 445-450页

作者： Hanhao Zheng Daiyin Liu Zhicong Liu mingjie An Yuming Luo Changhao Chen Tianxin Lin Department of Urology Sun Yat-sen Memorial Hospital Sun Yat-sen University Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation Sun Yat-sen Memorial Hospital State Key Laboratory of Oncology in South China Department of General Surgery Guangdong Provincial People's Hospital Guangdong Academy of Medical Sciences

Lymph node (LN) metastasis is a process in which cancer cells travel from primary tumors to LNs via the lymphatic system,then proliferate and spread within the LNs. In most cancers,LN metastasis is a major mode of cancer dissemination,and a critical indicator of cancer progression and worsening prognosis1. The occurrence of LN metastasis indicates that the tumor has invaded the lymphatic system,

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Effects of lead pollution on soil microbial community diversity and biomass and on invertase activity

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Soil Ecology Letters 2023年第1期5卷 118-127页

作者： Xin sun mingjie sun Ying Chao Xiaoyang Shang Hui Wang Hong Pan Quangang Yang Yanhong Lou Yuping Zhuge National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources College of Resources and EnvironmentShandong Agricultural UniversityTai’an 271018China Tai’an Hi-Tech Industrial Development Zone Tai’an 271000China Rizhao Municipal Bureau of Agricultural and Rural Affairs Rizhao 276800China Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources Ministry of Agriculture and Rural AffairsBeiJing 100125China

Lead(Pb)pollution is one of the most widespread and harmful environmental problems worldwide.Determination of changes in soil properties and microbial functional diversity due to land use is needed to establish a basis for remediation of soil pollution.This study aimed to investigate soils contaminated by Pb from different sources and to analyze the functional diversity and metabolism of soil microbial communities using Biolog technology.Pb pollution(>300 mg kg-1)significantly influenced the diversity and metabolic functions of soil microbial communities.Specifically,Pb contamination significantly reduced soil microbial biomass carbon(C)and nitrogen(N)levels and catalase activity while increasing invertase activity.Furthermore,Biolog EcoPlate assays revealed that Pb pollution reduced the general activities of soil microorganisms,suppressing their ability to utilize C sources.In Pb-contaminated areas lacking vegetation cover,Shannon,Simpson,and McIntosh diversity indices of soil microorganisms were significantly reduced.The microbial diversity and biomass C and N levels were affected by land use and soil properties,respectively,whereas soil enzyme activity was primarily affected by the interaction between land use and soil properties.Our results provide a reference and a theoretical basis for developing soil quality evaluation and remediation strategies.

关键词： Lead pollution Biolog Microbial functional diversity Soil enzyme activities Environment toxicity

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七鳃鳗——铁代谢研究的极佳模型

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遗传 2024年第5期46卷 387-397页

作者：孙明洁卢佳丽逄越辽宁师范大学生命科学学院大连116081 辽宁师范大学七鳃鳗研究中心大连116081

七鳃鳗历经5亿年的进化历程,所处的自然环境具有低温及铁含量较高等特点,且在变态发育过程中组织结构和生命机制已经发展出其独特的适应性的进化方式,这为人们进一步研究生命起源和进化提供了新的方向。铁是人体必需的营养素之一,在代... 详细信息

七鳃鳗历经5亿年的进化历程,所处的自然环境具有低温及铁含量较高等特点,且在变态发育过程中组织结构和生命机制已经发展出其独特的适应性的进化方式,这为人们进一步研究生命起源和进化提供了新的方向。铁是人体必需的营养素之一,在代谢过程中发挥重要的作用,但当过量时可能导致铁中毒。七鳃鳗体内游离铁含量很高,如变态前幼体的血清铁浓度是人类正常男性的149倍,幼体肝中的铁含量约是人类正常含量的2~3倍。七鳃鳗具有完备的生物化学系统耐受体内高浓度的游离铁,铁稳态的重要基因如转铁蛋白、铁蛋白重链、超氧化物歧化酶等基因高表达,提升了铁转运、铁储存及抗氧化能力。七鳃鳗具有IRE/IRP调控系统,是适应组织内高铁环境的重要保护机制。此外,七鳃鳗在变态发育过程中逐渐形成口腔腺,成为独特的铁代谢器官。本文主要介绍了七鳃鳗各组织铁的分布及适应体内高铁含量的潜在机制,为后续寻找调控铁代谢分子机制提供理论基础。

关键词：七鳃鳗铁代谢适应进化变态发育

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试论手工技艺信息的传播特性与要求

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艺术传播研究 2024年第4期 68-77页

作者：孙明洁山东工艺美术学院人文艺术学院

传播学视角下的“手工技艺”是承载于人类身体上的一种特殊信息,它既具有一般信息的基本属性,又具有契合手工技艺特征的独特属性。而手工技艺传承就是关于手工技艺信息的传播活动,它既要满足一般信息的传播要求,又要保持技艺信息传播的... 详细信息

传播学视角下的“手工技艺”是承载于人类身体上的一种特殊信息,它既具有一般信息的基本属性,又具有契合手工技艺特征的独特属性。而手工技艺传承就是关于手工技艺信息的传播活动,它既要满足一般信息的传播要求,又要保持技艺信息传播的实践性、恒定性与核心性等,这些性质是影响和制约手工技艺信息传播效果的重要因素。对手工技艺信息传播特性与传播要求的探析,有助于为实现其高效优质传承提供一种理论依据。

关键词：传播学手工技艺信息传播特性传播要求

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Improving seeking precision by utilizing ghost imaging in a semi-active quadrant detection seeker

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Chinese Journal of Aeronautics 2021年第12期34卷 171-176页

作者： Siyuan WANG Lijing LI Wen CHEN mingjie sun Department of Opto-electronic Engineering Beihang UniversityBeijing 100083China

Conventional semi-active laser guidance takes advantage of the laser designator to illuminate the stable and uniform laser spot on target precisely.The seeker collects the reflected light by a quadrant detector and outputs the relative position information to guide the missile to the illuminating laser spot.However,the designation and guidance accuracy could be jeopardized by the randomly drifting of laser spot caused by the instability of designation platform and air turbulence.In this work,ghost imaging technique is adapted to a quadrant detector semi-active seeker by utilizing structured illumination on the target.With a series of structured illumination masks,the signals from the quadrant detector are multiplexed to perform calculation of the target relative position as well as image reconstruction of the illuminated area simultaneously.Automatic target recognition methods could be further applied to the reconstructed image to calculate the designating error and correct the guidance.The results of simulation and experiment demonstrate that the proposed method could improve the guidance accuracy in many circumstances which would lead to attacking deviation if conventional semi-active laser guidance is used.

关键词： Digital micro-mirror device Ghost imaging Guidance system Image acquisition Semi-active laser seeker

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50岁以上髋臼后壁骨折患者的手术疗效观察

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中华创伤骨科杂志 2024年第3期26卷 202-208页

作者：孙源唐明杰孙玉强上海交通大学医学院附属第六人民医院骨科上海200233

目的探讨50岁以上髋臼后壁骨折患者的手术疗效。方法回顾性分析2003年8月至2021年11月期间上海交通大学医学院附属第六人民医院骨科采用Kocher-Langenbeck入路手术治疗且获得完整随访的67例50岁以上髋臼后壁骨折患者资料。男54例,女13例... 详细信息

目的探讨50岁以上髋臼后壁骨折患者的手术疗效。方法回顾性分析2003年8月至2021年11月期间上海交通大学医学院附属第六人民医院骨科采用Kocher-Langenbeck入路手术治疗且获得完整随访的67例50岁以上髋臼后壁骨折患者资料。男54例,女13例;年龄59.0(54.0,63.0)岁;受伤至手术时间为8.0(5.0,13.0) d。63例患者一期行切开复位内固定术,4例患者一期行髋关节置换术。记录患者的手术时间、术中出血量、术后骨折复位质量、末次随访时髋关节功能及随访期间并发症的发生情况等。结果 67例患者的手术时间为90.0(67.5,101.3) min,术中出血量为350.0(300.0,450.0) mL。63例内固定治疗患者术后骨折复位质量根据Matta评分标准评定:均达到解剖复位。67例患者术后获(112.8±62.4)个月随访。末次随访时63例内固定治疗患者根据改良Merle d’’Aubigné & Postel评分系统评定患髋功能:优56例,良3例,可2例,差2例,优良率为93.6%(59/63);4例一期行髋关节置换术患者假体均生存,髋关节Harris评分分别为94、92、91、93分。术后并发症:异位骨化15例(23.8%,15/63);坐骨神经一过性麻痹1例(1.6%,1/63);股骨头缺血性坏死并创伤性关节炎2例(3.2%,2/63),术后3年行全髋关节置换术治疗。随访期间无一例患者发生感染。结论切开复位内固定仍是50岁以上髋臼后壁骨折患者的主要治疗手段,可取得良好的临床疗效,手术治疗有助于患者关节功能和生活质量的早期恢复。

关键词：髋臼骨折骨折固定术,内治疗结果切开复位后壁 50岁

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