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Pulsed dynamic electrolysis enhanced PEMWE hydrogen production:Revealing the effects of pulsed electric fields on protons mass transport and hydrogen bubble escape

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Journal of Energy Chemistry 2025年第1期100卷 201-214页

作者： Xuewei Zhang Wei zhou Yuming Huang Liang Xie Tonghui Li Huimin Kang Lijie Wang yang Yu yani Ding Junfeng Li Jiaxiang Chen Miaoting Sun Shuo Cheng Xiaoxiao Meng Jihui Gao Guangbo zhao School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina China Datang Technology Innovation Co. LtdXiong’an 071799HebeiChina

The transition of hydrogen sourcing from carbon-intensive to water-based methodologies is underway,with renewable energy-powered proton exchange membrane water electrolysis(PEMWE)emerging as the preeminent pathway for hydrogen *** remarkable advancements in this field,confronting the sluggish electrochemical kinetics and inherent high-energy consumption arising from deteriorated mass transport within PEMWE systems remains a formidable *** impediment stems primarily from the hindered protons mass transfer and the untimely hydrogen bubbles *** address these challenges,we harness the inherent variability of electrical energy and introduce an innovative pulsed dynamic water electrolysis *** to constant voltage electrolysis(hydrogen production rate:51.6 m L h^(-1),energy consumption:5.37 kWh Nm-^(3)H_(2)),this strategy(hydrogen production rate:66 m L h^(-1),energy consumption:3.83 kWh Nm-^(3)H_(2))increases the hydrogen production rate by approximately 27%and reduces the energy consumption by about 28%.Furthermore,we demonstrate the practicality of this system by integrating it with an off-grid photovoltaic(PV)system designed for outdoor operation,successfully driving a hydrogen production current of up to 500 mA under an average voltage of approximately 2 *** combined results of in-situ characterization and finite element analysis reveal the performance enhancement mechanism:pulsed dynamic electrolysis(PDE)dramatically accelerates the enrichment of protons at the electrode/solution interface and facilitates the release of bubbles on the electrode *** such,PDE-enhanced PEMWE represents a synergistic advancement,concurrently enhancing both the hydrogen generation reaction and associated transport *** promising technology not only redefines the landscape of electrolysis-based hydrogen production but also holds immense potential for broadening its application across a diverse spectrum of electrocatalytic end

关键词： Water electrolysis Hydrogen production Pulsed dynamic electrolysis Proton exchange membrane water electrolysis Mass transport

超越与融合——《英国病人》对民族主义的超越

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商丘职业技术学院学报 2013年第1期12卷 63-64页

作者：赵亚洲张飞珑云南师范大学外国语学院云南昆明650500

迈克尔.翁达杰成名作《英国病人》中主要人物的言行以及别墅与沙漠都体现了对民族主义的超越。这种超越和作者混杂的身份密切相关。超越民族主义需要避免民族主义的负面影响,在保持独立的民族特性的基础上,促进各民族间的相互融合。

关键词：《英国病人》民族主义超越融合

40%苄嘧·丙草胺可分散油悬浮剂及安全剂解草啶的HPLC分析

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农药 2023年第4期62卷 256-259页

作者：王睿谭正莹赵亚洲张玉梅贵州省检测技术研究应用中心贵阳550014 贵州省分析测试研究院贵阳550014 贵州健安德科技有限公司贵阳550014

[目的]建立一种利用HPLC同时检测40%苄嘧·丙草胺可分散油悬浮剂中有效成分和安全剂解草啶的定量分析方法。[方法]以乙腈和0.05%磷酸水溶液为流动相,搭配岛津C_(18)反相色谱柱,在240 nm波长条件下,同时对苄嘧磺隆、丙草胺和解草啶进行... 详细信息

[目的]建立一种利用HPLC同时检测40%苄嘧·丙草胺可分散油悬浮剂中有效成分和安全剂解草啶的定量分析方法。[方法]以乙腈和0.05%磷酸水溶液为流动相,搭配岛津C_(18)反相色谱柱,在240 nm波长条件下,同时对苄嘧磺隆、丙草胺和解草啶进行定量分析。[结果]苄嘧磺隆、丙草胺和解草啶线性相关系数R^(2)均大于0.999,SD(标准偏差)分别为0.02、0.39和0.04,CV(变异系数)分别为0.49%、1.08%和0.46%,平均回收率分别为98.1%、100.5%和99.4%。[结论]该液相分析方法操作简便,线性关系良好,且拥有较好的分离度、精密度及准确度,适用于市场监管和生产企业对该复配制剂的质量检测和质量控制。

关键词：苄嘧磺隆丙草胺解草啶液相色谱分析方法

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Dual-Mode Colorimetric and Fluorescent Detection of Tumor Cells Based on Gold Nanoparticles-Loaded Phosphine Covalent Organic Frameworks

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Journal of Analysis and Testing 2025年第01期 21-31页

作者： Bilian Li Min zhou Chun zhao Lin Xiao Tianle Qi Hanbin Xu Linjiang Guo Guobao Ning Xiaokang Lu Keming Zhu Hui zhao Can-Peng Li School of Chemical Science and Technology Yunnan University Affiliated Hospital of Yunnan University School of Life Science Yunnan University Laboratory for Conservation and Utilization of Bioresource Yunnan University

Circulating tumor cells(CTCs) are important markers for cancer. The part of tumor cells that are detached from the primary tumor or metastatic tumor and enter the blood circulation is called CTCs. It is crucial to develop a rapid, accurate, and easy-to-implement diagnostic system for CTCs for early tumor diagnosis and for monitoring progression of the disease. In this work, we reported a colorimetric and fluorescent dual-mode assay for the detection of CTCs. Our assay used magnetic nanoparticles and aptamer for CTCs capture and gold nanoparticles-loaded covalent organic frameworks(Au@COFs) for signal amplification, respectively. The magnetic nanoparticles were modified with folic acid to capture CTCs by interaction between folic acid and the folate receptor overexpressed on the surface of tumor cells. The covalent organic frameworks were engineered to have both nitro-reductase-like and glucose–oxidase-like activities. The nitro-reductase-like activity converted the substrate p-nitrophenol to p-nitroaniline for colorimetric detection, and the glucose-oxidase-like activity enabled fluorescence detection. Specifically, Au@COFs catalyzed glucose oxidation and generated hydrogen peroxide to oxidize Fe 2+to Fe 3+, which converted MIL(Al)-MOF to MIL(Fe)-MOF through ion exchange, resulting in the fluorescence quenching of MIL(Al)-MOF. Our assay showed high sensitivity with a detection limit of 17 cells/mL using MCF-7 cells as model cancer cells. This work provided an e fficient and ultrasensitive strategy for CTCs detection and has potential applications in cancer identification and diagnosis. Dual-mode detection system, combining colorimetric and fluorescent signals, integration of magnetic nanoparticles and aptamers for CTC capture, and utilization of covalent organic frameworks loaded with gold nanoparticles for signal amplification can improve sensitivity and accuracy.

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黄连木种群性比格局研究

浙江林业科技 2010年第6期30卷 12-17页

作者：赵亚洲张春雨张琰马钦彦赵秀海上海农林职业技术学院上海201600 北京林业大学北京100083

在100 m×140 m固定样地中检验黄连木种群性比与繁殖植株密度、种群密度和林分密度的关系,分析微生境因子对黄连木种群性比的影响。结果表明:黄连木雌、雄植株数随取样面积的增加而增大,且种群性比显著偏雄性(检验,p<0.05);黄连木种群... 详细信息

在100 m×140 m固定样地中检验黄连木种群性比与繁殖植株密度、种群密度和林分密度的关系,分析微生境因子对黄连木种群性比的影响。结果表明:黄连木雌、雄植株数随取样面积的增加而增大,且种群性比显著偏雄性(检验,p<0.05);黄连木种群性比表现出显著的密度依赖性(p<0.001),雄株比例与繁殖植株密度、种群密度、林分密度均呈显著正相关;在10 m×10 m研究尺度上,雌树和雄树株数均与土壤全氮、有机碳、有机质以及枯落物厚度呈显著正相关,表明黄连木种群雌雄植株具有相似的资源需求;黄连木雄树株数与土壤湿度呈显著正相关,土壤全磷含量对黄连木种群性比具有显著负向影响,而土壤湿度则对种群性比表现出显著正向影响。

关键词：雌雄异株性比密度依赖生境因子黄连木

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永磁辅助式同步磁阻电机航空发电系统的研究

微特电机 2021年第11期49卷 53-57,66页

作者：赵雅周袁静兰李洋北京曙光航空电气有限责任公司北京100028

结合永磁辅助式同步磁阻电机特征及飞机对发电系统高效、高功率密度、高转速的需求,在对比不同类型起动发电机优缺点的基础上,提出了永磁辅助式同步磁阻电机的270 V高压直流电源系统新构型。给出了电机和功率变换器工作原理和结构特征,... 详细信息

结合永磁辅助式同步磁阻电机特征及飞机对发电系统高效、高功率密度、高转速的需求,在对比不同类型起动发电机优缺点的基础上,提出了永磁辅助式同步磁阻电机的270 V高压直流电源系统新构型。给出了电机和功率变换器工作原理和结构特征,重点分析系统发电模式下双三相永磁辅助式同步磁阻电机电压外环恒转矩角电流内环控制策略。以额定功率45 kW直流电源系统为对象,建立Simulink发电控制模型,分别对电机稳态调压、负载瞬态变换和畸变频谱进行仿真,仿真结果表明,该系统性能可满足国军标和飞机对电源系统需求。

关键词：直流电源系统永磁辅助式同步磁阻电机电源变换器控制策略仿真验证

Dynamic evolution of Co species and morphological reconstruction on Co-N-C during the nitrate reduction reaction in neutral solution

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Nano Research 2025年第1期18卷 164-172页

作者： Yuanlin Fu Xiaoting yang ya Yu Kang zhou Xiaoyang Ye Aoxiang Zhang Xiaojiao Hou Bingbing Chen Fuqiang Fan Yuhang Li Yu Fu Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819China Department of Physical Education Shen Yang Institute of Science and TechnologyShenyang 110167China Sungrow Power Supply Co. Ltd.Hefei 230088China

The electrochemical nitrate reduction reaction(eNO_(3)^(-)RR)is considered an effective approach for converting nitrate-containing wastewater to *** adsorption and activation of NO_(3)^(-)is the critical step for many materials and the high energy barrier inhibits the continuation of the reduction *** Co nanoparticles encapsulated in the carbon layer we prepared spontaneously react with NO_(3)^(-)and the resulting Co^(2+)is then reduced by electroreduction to Co^(0),which circulates *** resulted in overcoming the energy input required for NO_(3)^(-)adsorption and conversion,thereby increasing the catalytic *** the same time,the morphology of the catalyst reconstructed from a dodecahedron to an interwoven nanosheet structure and the increased surface area also gives it better *** obtained Co(OH)_(2)@Co-N-C has an excellent eNO_(3)^(-)RR of 2774.7μg·h^(-1)·cm^(-2)with a Faraday efficiency of 81.4%in neutral *** the same time,the material-modified electrode can run stably for more than 100 *** work provides a new idea for the design of Co-based catalysts for eNO_(3)^(-)RR.

关键词： electrochemical nitrate reduction reaction Co-based catalyst dynamic evolution of Co species morphological reconstruction

A versatile synthetic strategy towards rare earth based metal-organic frameworks

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Science China Chemistry 2025年

作者： Quan Shi Yun-Hao Xu Ming-Hui Chen Peng zhao Wen-Bo Deng Ji Xiong Kai Guo ya-Qing Feng Bao Zhang School of Chemical Engineering and Technology Tianjin University Tianjin Collaborative Innovation Center of Chemical Science and Engineering Guangdong Laboratory Chemistry & Fine Chemical Industry Jieyang Center

Rare earth metal-organic frameworks (RE-MOFs) have drawn wide attention owing to diverse network structures and various application ***,due to the unpredictable formation of the nodes,it is still challenging to design novel RE-MOFs.A novel versatile strategy was developed employing a RE-acetate complex (RE2(CH3COO)6·4H2O) as a precursor to construct RE-MOFs.2D RE-MOFs (RE-DBP) and 3D RE-MOFs (RE-TCPP) could be obtained by using dicarboxylic porphyrin ligands H2DBP and tetracarboxylic porphyrin ligands H2TCPP,*** RE-MOFs were further synthesized to verify the universality of the *** crystalline RE-MOFs could also be prepared at room temperature via the developed strategy,which could significantly promote large-scale preparation and practical application of *** proof of the concept,the performance of porphyrin-based RE-MOFs was investigated in the photocatalytic cycloaddition of CO2with *** the RE-DBP(Co) MOFs,Tb-DBP(Co) exhibited the best photocatalytic performance,which was also greater than that of the corresponding 3D MOF Tb-TCPP(Co) due to the optimal 2D structure and thus the accelerated photogenerated charge separation and transfer *** work not only provides a novel versatile strategy to design and develop RE-MOFs,but also proposes a promising approach for the potential bulk production of RE-MOFs at room temperature.

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大国博弈下的亚太绿色产业竞合:主要特征、演化原因与未来趋势

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东北亚论坛 2025年第1期34卷 84-99,128页

作者：周亚敏中国社会科学院亚太与全球战略研究院

《巴黎协定》下21世纪中叶全球实现净零排放的目标导向,促使各国加速推进国内绿色转型进程,因而绿色产业实力跃升为国家竞争优势的主要来源之一。亚太地区既是全球绿色转型的重点区域,也是大国战略博弈的焦点区域,域内绿色产业的竞争张... 详细信息

《巴黎协定》下21世纪中叶全球实现净零排放的目标导向,促使各国加速推进国内绿色转型进程,因而绿色产业实力跃升为国家竞争优势的主要来源之一。亚太地区既是全球绿色转型的重点区域,也是大国战略博弈的焦点区域,域内绿色产业的竞争张力与合作聚力并存。美国及其盟伴将中国的绿色优势产业视为战略竞争对手的战略优势产业,以高补贴、高关税为手段实施边追赶、边遏制的策略,力求以“脱钩断链”方式打压中国的既有绿色竞争优势。亚太广大发展中国家则需要绿色产业合作,需要来自中国的优质绿色技术及应用能力的帮助。一方面,广泛部署绿色技术有助于这些国家以低成本实现碳中和;另一方面,在产业梯度转移规律驱动下,中国绿色产业链的发展将为周边国家创造嵌入先进产业链的历史机遇。亚太绿色产业合作符合域内发展中国家既追求减排又兼顾增长的根本诉求,而亚太绿色产业竞争由政治诉求驱动违背市场规律将大幅折损区域绿色转型效率。

关键词：碳中和大国博弈亚太绿色产业链竞合