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Hybridization of iron phthalocyanine and MoS_(2)for high-efficiency and durable oxygen reduction reaction

Journal of Energy Chemistry 2022年第8期31卷 528-538,I0014页

作者： Haibing Meng Xiaolong Liu Xiao Chen Ying Han chenhui zhou Qinyuan Jiang Ting Tan Rufan Zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Laboratory of Theoretical and Computational Nanoscience CAS Key Laboratory of Nanophotonic Materials and DevicesNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China

Hybrid catalysts based on iron phthalocyanine(FePc)have raised much attention due to their promising applications in electrocatalytic oxygen reduction reaction(ORR).Various hybridization strategies have been developed for improving their activity and ***,the influence of different hybridization strategies on their catalytic performance remains *** this study,Fe Pc was effectively distributed on molybdenum disulfide(MoS_(2))forming Fe Pc-based hybrid catalysts,namely Fe Pc-MoS_(2),Fe Pc*-MoS_(2),and Fe Pc-Py-MoS_(2),respectively,to disclose the related *** direct hybridization,the stacked and highly dispersed Fe Pc on MoS_(2)resulted in Fe Pc-MoS_(2),and Fe Pc*-MoS_(2),respectively,in which the substrate and Fe Pc are mainly bound through van der Waals *** covalent hybridization strategy using pyridyl(Py)as a linker,Fe Pc-Py-MoS_(2)hybrid catalyst was *** and theoretical results disclosed that the linker hybridization of Fe Pc and MoS_(2)facilitated the exposure of Fe-N4 sites,maintained the intrinsic activity of Fe Pc by forming a more dispersed phase and increased the durability via Fe-N bonding,rendering the Fe Pc-Py-MoS_(2)an excellent ORR hybrid *** with van der Waals hybridized Fe Pc-MoS_(2)and Fe Pc*-MoS_(2)in alkaline media,the linker hybridized Fe Pc-Py-MoS_(2)showed an obviously enhanced ORR activity with a half-wave potential(E_(1/2))of 0.88 V vs RHE and an ultralow Tafel slope of 26 m V ***,the Fe Pc-Py-MoS_(2)exhibited a negligible decay of E_(1/2) after 50,000 CV cycles for ORR,showing its superior *** work gives us more insight into the influence of different hybrid strategies on Fe Pc catalysts and provides further guidance for the development of highly efficient and durable ORR catalysts.

关键词： FePc MoS_(2) Hybridization strategies Charge transfer ORR performance

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Post-acute ischemic stroke hyperglycemia aggravates destruction of the blood-brain barrier

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Neural Regeneration Research 2024年第6期19卷 1344-1350页

作者： Tianqi Xu Jianhong Yang Yao Xu Xiaofeng Wang Xiang Gao Jie Sun chenhui zhou Yi Huang Department of Neurology The First Affiliated Hospital of Ningbo UniversityNingboZhejiang ProvinceChina Department of General Surgery The First Affiliated Hospital of Ningbo UniversityNingboZhejiang ProvinceChina Department of Neurosurgery The First Affiliated Hospital of Ningbo UniversityNingboZhejiang ProvinceChina Key Laboratory of Precision Medicine for Atherosclerotic Diseases of Zhejiang Province NingboZhejiang ProvinceChina

Post-acute ischemic stroke hyperglycemia increases the risk of hemorrhagic transformation,which is associated with blood-brain barrier *** microvascular endothelial cells are a major component of the blood-brain *** mitochondrial transfer has emerged as a novel paradigm for repairing cells with mitochondrial *** this study,we first investigated whether mitochondrial transfer exists between brain microvascular endothelial cells,and then investigated the effects of post-acute ischemic stroke hyperglycemia on mitochondrial transfer between brain microvascular endothelial *** found that healthy brain microvascular endothelial cells can transfer intact mitochondria to oxygen glucose deprivation-injured brain microvascular endothelial ***,post-oxygen glucose deprivation hyperglycemia hindered mitochondrial transfer and exacerbated mitochondrial *** established an in vitro brain microvascular endothelial cell model of the blood-brain *** found that post-acute ischemic stroke hyperglycemia reduced the overall energy metabolism levels of brain microvascular endothelial cells and increased permeability of the blood-brain *** a clinical study,we retrospectively analyzed the relationship between post-acute ischemic stroke hyperglycemia and the severity of hemorrhagic *** found that post-acute ischemic stroke hyperglycemia serves as an independent predictor of severe hemorrhagic *** findings suggest that post-acute ischemic stroke hyperglycemia can aggravate disruption of the blood-brain barrier by inhibiting mitochondrial transfer.

关键词： acute ischemic stroke blood-brain barrier brain microvascular endothelial cells mitochondrial transfer stress hyperglycemia

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Antioxidative effects of berberine pre-treatment on hydrogen peroxide-induced PC12 cell toxicity

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Neural Regeneration Research 2010年第18期5卷 1391-1395页

作者： Daohua Xu chenhui zhou Department of Pharmacology Guangdong Medical College Dongguan 523808 Guangdong Province China Institution of Traditional Chinese Medicine and New Drugs Research Guangdong Medical College Dongguan 523808 Guangdong Province China

Oxidative stress has been implicated in the pathogenesis of Alzheimer＇s disease. Oxidative damage could be prevented by augmenting the endogenous defense capacity against oxidative stress by antioxidant intake. As an effective alkaloid component of Chinese herbal medicine Rhizoma coptidis extract, berberine exhibits antioxidative properties and ameliorates memory impairment in a rat model of Alzheimer＇s disease. The present study investigated the protective effects of berberine on H2O2-induced PC12 cell toxicity. Results demonstrated that berberine protects PC12 cells from H2O2-induced apoptosis and increases PC12 cell viability. Lactate dehydrogenase release, reactive oxygen content, and malonyl dialdehyde levels were significantly decreased （P 〈 0.01）. The protective effects of berberine on H2O2-induced PC12 cell toxicity were achieved via the antioxidative effects of berberine.

关键词： berberine PC12 cells Alzheimer's disease reactive oxygen oxidative stress neural regeneration

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Sevoflurane pretconditioning has similar effects as sevoflurane postconditioning to attenuate transient outward potassium channel current suppression after ischemia reperfusion injury

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中国循环杂志 2018年第S1期33卷 171-172页

作者： Junsong Gong Nengxin Fang chenhui zhou Jian Huang Lihuan Li Anesthesia Center National Center for Cardiovascular DiseasesFuwai HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

Objective To investigate the effects of sevoflurane preconditioning and postconditioning on electrophysiological characteristics of transient outward potassium channel(Ito)in rat ventricular *** Isolated rat hearts were harvested and balanced with Langendorff perfusion system,then they were randomly assigned to one of the following 4 groups(n=10):(1)Time Control group(perfused with KH solution for 75 min);(2)Ischemia/reperfusion(I/R)group(perfused with KH solution for 20 min and then subjected to 25 min of global ischemia followed by 30 min of reperfusion with KH solution).

关键词： similar effects sevoflurane preconditioning rat ventricular myocytes

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Protective effect of paeonol on beta-amyloid 25-35- induced toxicity in PC12 cells

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Neural Regeneration Research 2008年第8期3卷 863-866页

作者： Daohua Xu chenhui zhou Bilian Xu Shiying Luo Department of Pharmacology Guangdong Medical College Zhanjiang 524023 Guangdeng Province China School of Nursing Guangdong Medical College Zhanjiang 524023 Guangdong Province China

BACKGROUND：Paeonol is a primary phenolic component of the Chinese medicinal herb Cortex moutan. Recent studies have shown that paeonol has anti-inflammatory, analgesic, and antioxidative effects as well as a significant cardioprotective effect against myocardial ischemia. OBJECTIVE： To investigate the protective effect of paeonol on β-amyloid 25-35-induced toxicity in PC12 cells and analyze its mechanism of action. DESIGN, TIME AND SETTING： A controlled repeated-measures cell-based study was performed in the Department of Pharmacology of Guangdong Medical College between September 2006 and December 2007. MATERIALS： Paeonol was supplied by Xuancheng Baicao Plant Industry and Trade Company, China. PC12 cells were a kind gift from Dr. Haitao Zhang at Guangdong Medical College. β-amyloid 25-35 was purchased from Sigma Company, USA. Lactate dehydrogenase （LDH） and malondialdehyde （MDA） kits were purchased from Nanjing Jiancheng Bioengineering Research Institute, China. METHODS： PC12 cells were maintained in Dulbecco＇s modified eagle＇s medium （DMEM） supplemented with 100 mL/L heat-inactivated horse serum and 50 mL/L fetal bovine serum at 37 ℃ and cultured in an incubator with 5% CO2. The medium was renewed every other day. Batches of cells were assigned into three groups. （1） Paeonol group： cells were preincubated with different concentrations of paeonol （12, 25 or 50 μmol/L） for one hour and β-amyloid 25-35 was added to the medium; （2） control group： cells were cultured in DMEM supplemented with 100 mL/L heat-inactivated horse serum and 50 mL/L fetal bovine serum; and （3） β-amyloid 25-35 group： β-amyloid 25-35 was added to the medium. MAIN OUTCOME MEASURES： When PC12 cells in each group were cultured for 24 hours, the cell viability was determined using the MTT reduction assay, LDH release into the culture media was measured by 2,4-dinitrophenylhydrazine chromatometry and MDA content was measured using a thiobarbituric acid assay. RESULTS： When PC12 cells were treated wi

关键词： paeonol PC12 cells Alzheimer's disease β-amyloid

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FeCoSi合金磁粉磷化处理及高频电磁性能

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中国材料进展 2021年第3期40卷 161-166页

作者：陈起明周晨晖严密吴琛浙江大学材料科学与工程学院硅材料国家重点实验室浙江杭州310027

采用快淬甩带和高能球磨工艺制备了成分为Fe70Co12Si18(合金名称中数字为原子百分数)的片状合金磁粉,并用磷酸酒精溶液对磁粉进行了磷化处理。重点研究了磷化前后及不同磷酸浓度对FeCoSi磁粉电磁参数和微波吸收性能的影响。结果表明,随... 详细信息

采用快淬甩带和高能球磨工艺制备了成分为Fe70Co12Si18(合金名称中数字为原子百分数)的片状合金磁粉,并用磷酸酒精溶液对磁粉进行了磷化处理。重点研究了磷化前后及不同磷酸浓度对FeCoSi磁粉电磁参数和微波吸收性能的影响。结果表明,随着磷酸浓度的提高,FeCoSi合金吸波材料的介电常数实部和虚部均减小,磁导率实部基本不变、虚部有少量减小,反射损耗(RL)增加。20%(质量分数)磷酸磷化样品在厚度为1.6 mm时的RL为-33.4 dB,带宽为5.2 GHz。高能球磨增加了磁粉的形状各向异性,使样品具有了较高的自然共振频率,且自然共振频率随着磷酸浓度的升高而进一步提高。样品经磷化处理后在表面生成了磷酸盐层,该磷酸盐层不仅通过增大材料的电阻率调控了样品的介电常数,有效改善了样品的阻抗匹配,同时向样品中引入了磁粉/磷化层等界面,增强了样品的界面极化作用。

关键词： FeCoSi合金磷化处理电磁参数高频性能吸波机制

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Boosting hydrocarbon conversion via Cu-doping induced oxygen vacancies on CeO_(2) in CO_(2)electroreduction

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Journal of Energy Chemistry 2025年第1期100卷 66-76页

作者： Lei Xue Tong Shi chenhui Han Heng Zhang Fenrong Liu Haorun Li Yan Wang Xiaojun Gu Shanghong Zeng Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials School of Chemistry and Chemical EngineeringInner Mongolia UniversityHohhot 010021Inner MongoliaChina State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001ShanxiChina Institute of Catalysis Department of ChemistryZhejiang UniversityHangzhou 310058ZhejiangChina National Key Laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030Inner MongoliaChina

Conversion of CO_(2)back to hydrocarbons is the most direct way of closing the“carbon cycle”,and its significance is further enlarged if this process is driven by renewable energies such as ***,precisely controlling the product selectivity towards hydrocarbons against the competitive hydrogen evolution remains challenging,especially for Cu-based ***,we report a novel defect engineering strategy,by which Cu-doping-induced oxygen vacancies on CeO_(2)nanorods were effectively created,with adjustable vacancy/Cu *** resulting optimum catalyst shows up to 79%catalytic current density to hydrocarbons(excluding CO),with 49%faradaic efficiency to *** and density functional theory unveil that the ratio between oxygen vacancy and Cu affects significantly the formation of*CHO and activation of H2O,which leads to the following deep hydrogenation to *** findings may spur new insights for designing and developing more controllable chemical process relevant to CO_(2)utilization.

关键词： Cu/CeO_(2)-x Oxygen vacancy Hydrocarbon production Reaction mechanism

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二维金属有机框架材料的合成及电催化应用

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高等学校化学学报 2021年第2期42卷 556-574页

作者：姜沁源周晨晖蒙海兵韩莹张如范清华大学化工系绿色反应工程与工艺北京市重点实验室清洁能源化工技术教育部工程研究中心北京100084

二维金属有机框架材料(MOFs)由于具备高比表面积、多孔性以及丰富的活性位点等优异特性而受到广泛关注,并且在电催化领域展现出巨大的应用潜力.研究者们已在二维MOFs的可控制备与电催化性能调控方面取得许多突破性进展,显示出相关研究... 详细信息

二维金属有机框架材料(MOFs)由于具备高比表面积、多孔性以及丰富的活性位点等优异特性而受到广泛关注,并且在电催化领域展现出巨大的应用潜力.研究者们已在二维MOFs的可控制备与电催化性能调控方面取得许多突破性进展,显示出相关研究对开发高性能电催化剂的关键作用.本文总结了二维MOFs的自上而下和自下而上合成策略以及二维MOFs衍生物的典型合成方法,概述了二维MOFs在各尺度下的电催化性能调控策略,并介绍了各种合成方法和调控策略在电催化中的应用.最后讨论了该领域面临的挑战,并对未来的发展方向进行了展望.

关键词：金属有机框架电催化合成方法性能调控

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薄煤层采煤机大截深开采技术研究与应用

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中国矿业 2024年第S2期33卷 204-207页

作者：周晨辉刘银报国能神东煤炭集团有限责任公司高端设备研发中心陕西榆林719315

针对部分薄煤层工作面通过增大滚筒截深来提高开采效率和减少工人劳动强度的需求,建立了折算单刀开采效率计算模型,对开采效率提高影响较大的装煤效果和牵引速度深入研究分析,并提供两个具有代表性的应用案例。本文研究为矿方研究其通... 详细信息

针对部分薄煤层工作面通过增大滚筒截深来提高开采效率和减少工人劳动强度的需求,建立了折算单刀开采效率计算模型,对开采效率提高影响较大的装煤效果和牵引速度深入研究分析,并提供两个具有代表性的应用案例。本文研究为矿方研究其通过增大截深提高开采效率的可行性提供分析思路,同时也对薄煤层大截深开采技术的发展有一定的指导意义。

关键词：薄煤层采煤机大截深开采效率开采技术

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基于有限元法的浆砌石坝除险加固渗流问题分析

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水利科学与寒区工程 2023年第12期6卷 47-50页

作者：周晨晖塔城水利设计研究院有限公司新疆塔城834700

本文以某水库工程为例,浅析了大坝的除险加固措施,并利用北京理正软件的渗流分析模块,对某水库土石坝除险加固前后进行渗流稳定复核,得到加固前后的渗流量对比以及大坝坝坡在不同工况条件下的安全系数。计算结果表明,该水库加固后渗漏... 详细信息

本文以某水库工程为例,浅析了大坝的除险加固措施,并利用北京理正软件的渗流分析模块,对某水库土石坝除险加固前后进行渗流稳定复核,得到加固前后的渗流量对比以及大坝坝坡在不同工况条件下的安全系数。计算结果表明,该水库加固后渗漏量大幅降低,坝坡稳定,满足相关规范要求,除险加固设计合理,论证了工程的安全可靠性,研究可供相关类似工程参考借鉴。

关键词：浆砌石坝除险加固有限元渗流稳定

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