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Rational Design of Cost-Effective Metal-Doped ZrO_(2)for Oxygen Evolution Reaction

Nano-Micro Letters 2024年第9期16卷 385-396页

作者： Yuefeng Zhang Tianyi Wang Liang Mei Ruijie Yang Weiwei Guo Hao Li zhiyuan zeng Department of Materials Science and Engineering and State Key Laboratory of Marine PollutionCity University of Hong Kong83 Tat Chee AvenueKowloon 999077Hong KongPeople’s Republic of China Advanced Institute for Materials Research(WPI‑AIMR) Tohoku UniversitySendai 980‑8577Japan Shenzhen Research Institute City University of Hong KongShenzhen 518057People’s Republic of China Shanxi Supercomputing Center Lvliang 033000ShanxiPeople’s Republic of China

The design of cost-effective electrocatalysts is an open challenging for oxygen evolution reaction(OER)due to the“stable-oractive”dilemma.Zirconium dioxide(ZrO_(2)),a versatile and low-cost material that can be stable under OER operating conditions,exhibits inherently poor OER activity from experimental observations.Herein,we doped a series of metal elements to regulate the ZrO_(2)catalytic activity in OER via spin-polarized density functional theory calculations with van der Waals interactions.Microkinetic modeling as a function of the OER activity descriptor(G_(O*)-G_(HO*))displays that 16 metal dopants enable to enhance OER activities over a thermodynamically stable ZrO_(2)surface,among which Fe and Rh(in the form of single-atom dopant)reach the volcano peak(i.***.the optimal activity of OER under the potential of interest),indicating excellent OER performance.Free energy diagram calculations,density of states,and ab initio molecular dynamics simulations further showed that Fe and Rh are the effective dopants for ZrO_(2),leading to low OER overpotential,high conductivity,and good stability.Considering cost-effectiveness,single-atom Fe doped ZrO_(2)emerged as the most promising catalyst for OER.This finding offers a valuable perspective and reference for experimental researchers to design cost-effective catalysts for the industrial-scale OER production.

关键词： Oxygen evolution reaction Metal oxide Electrocatalysis Surface Pourbaix analysis Doping

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Tungsten oxide-anchored Ru clusters with electron-rich and anti-corrosive microenvironments for efficient and robust seawater splitting

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SusMat 2024年第1期4卷 106-115页

作者： Yiming Zhang Weiqiong Zheng Huijuan Wu Ran Zhu Yinghan Wang Mao Wang Tian Ma Chong Cheng zhiyuan zeng Shuang Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengduChina Department of Chemical and Biomolecular Engineering National University of SingaporeSingaporeSingapore Department of Materials Science and Engineering and State Key Laboratory of Marine PollutionCity University of Hong KongKowloonHong KongChina Shenzhen Research Institute City University of Hong KongShenzhenChina

Ruthenium(Ru)has been recognized as a prospective candidate to substitute platinum catalysts in water-splitting-based hydrogen production.However,minimizing the Ru contents,optimizing the water dissociation energy of Ru sites,and enhancing the long-term stability are extremely required,but still face a great challenge.Here,we report on creating tungsten oxide-anchored Ru clusters(Ru-WO_(x))with electron-rich and anti-corrosive microenvironments for efficient and robust seawater splitting.Benefiting from the abundant oxygen vacancy structure in tungsten oxide support,the Ru-WO_(x)exhibits strong Ru-O and Ru-W bonds at the interface.Our study elucidates that the strong Ru-O bonds in Ru-WO_(x)may accelerate the water dissociation kinetics,and the Ru-W bonds will lead to the strong metal-support interaction and electrons transfer fromWto Ru.The optimal Ru-WO_(x)catalysts exhibit a low overpotential of 29 and 218mVat the current density of 10 mA cm^(−2) in alkaline and seawater media,respectively.The outstanding long-term stability discloses that the Ru-WO_(x)catalysts own efficient corrosion resistance in seawater electrolysis.We believe that thiswork offers new insights into the essential roles of electron-rich and anti-corrosivemicroenvironments in Ru-based catalysts and provide a new pathway to design efficient and robust cathodes for seawater splitting.

关键词： hydrogen production microenvironment modulation noble metal catalysts seawater splitting tungsten oxide

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A Review on Particle Reinforced Mg Matrix Composites Fabricated by Powder Metallurgy

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 391-400页

作者： zhiyuan Liu Li Jin Jian zeng Fulin Wang Fenghua Wang Shuai Dong Jie Dong National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

This paper provides a comprehensive review of research progress in particle-reinforced Mg matrix composites prepared via powder metallurgy.The article discusses different strategies,such as micro-sized,nano-sized particles,and multi-particle hybridization,which has been employed to enhance the performance of the composites.In addition,a range of preparation techniques that optimize the dispersion of the reinforcing particles are summarized.The paper also highlights how the different configurations between the reinforcements and matrix alloy impact the composites’performance.Finally,the article outlines the prospects of particles reinforced Mg matrix composites fabricated via powder metallurgy and recommends modification methods that could be explored to further develop these materials for various applications.

关键词： Magnesium matrix composites Reinforcing particle Powder metallurgy Mechanical properties Configuration

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Pu-erh tea partly improved liver cholesterol metabolism disorders in colitis mice via the gut-liver axis

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Food Science and Human Wellness 2024年

作者： Shanshan Hu zhiyuan Lin Sibo Zhao Bowen Zhang Liyong Luo Liang zeng Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing Southwest University College of Food Science Southwest University

Pu-erh tea has been shown to reduce gut inflammation in DSS-induced mice. Also， we found abnormal liver cholesterol metabolism in dextran sulfate sodium (DSS)-induced mice. However， it’s not clear how Pu-erh tea improves DSS-induced impaired liver cholesterol metabolism. Here， we established the DSS-induced model and clarified that DSS exacerbated gut inflammation accompanied by disorders of liver cholesterol metabolism. Pu-erh tea reshaped gut microbes， limited gut oxidative stress and inflammation (NOX2/ROS/MyD88/NF-κB， 24.97%-52.89%)， reduced gut bile acid reabsorption (up-regulation of FXR/FGF15， 24.53%-55.91%)， and promoted liver bile acid synthesis (up-regulation of PPARα/CYP7A1， 34.65%-79.14%)， thereby partly restoring liver cholesterol metabolism (regulated FXR/SHP/SREBPs， 53.19%-95.40%). Altered bile acid metabolic profiles (increased chenodeoxycholic acid， ursodeoxycholic acid， lithocholic acid， etc.) may also improve liver cholesterol metabolism by altering gut and liver inflammation. Thus， gut microbial reshaping and altered bile acid metabolism may be key targets of Pu-erh tea for improving DSS-induced liver cholesterol metabolism disorders via the gut-gut microbe-bile acid-liver axis.

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Separation of aluminum from rare earth by solvent extraction with 4-octyloxybenzoic acid

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Journal of Rare Earths 2023年第2期41卷 290-299页

作者： Gaoshan Yu zhiyuan zeng Yun Gao Shuainan Ni Hepeng Zhang Xiaoqi Sun CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Research Center for Rare Earth Engineering Technology Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100039China Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou 341000China

Leaching method is usually used to extract rare earth(RE)elements from ion adsorbed RE ores.In the leaching process,some impurities such as aluminum(Al)enter the leaching solution.The separation of Al from RE by carboxylic acid extractant 4-octyloxybenzoic acid(POOA)was studied in this article.By changing the pH value,temperature,solvent,saponification degree and other parameters,the extraction and separation performance of POOA in chloride system was systematically studied.Through specific extraction experiments and slope analysis,it can be seen that the stoichiometric ratio of POOA to Al is 3:1during the extraction process.The separation factor of Al^(3+)and Pr^(3+)can reach about 160.00.Compared with easily emulsified naphthenic acid,POOA achieves better phase separation.The above results show that saponified POOA(S-POOA)has a good separation effect on Al and RE.Under the condition of low concentration stripping acid of 0.60 mol/L HCl,the developed extraction system can be almost completely stripped,and the stripping rate reaches 97.52%.The regenerated POOA can be directly used for the recycling extraction.

关键词： Rare earths Aluminium 4-octyoxybenzoic acid Solvent extraction Separation

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Hetero Nucleus Growth Stabilizing Zinc Anode for High‑Biosecurity Zinc‑Ion Batteries

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Nano-Micro Letters 2023年第12期15卷 349-360页

作者： Jingjing Li Zhexuan Liu Shaohua Han Peng Zhou Bingan Lu Jianda Zhou zhiyuan zeng Zhizhao Chen Jiang Zhou Department of Plastic Surgery and National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangsha 410008People’s Republic of China School of Materials Science and Engineering Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional MaterialsCentral South UniversityChangsha 410083People’s Republic of China Hunan Provincial Key Defense Laboratory of High Temperature Wear‑Resisting Materials and Preparation Technology Hunan University of Science and TechnologyXiangtan 411201People’s Republic of China School of Physics and Electronics Hunan UniversityChangsha 410082People’s Republic of China Department of Plastic Surgery The Third Xiangya HospitalCentral South UniversityChangsha 410013People’s Republic of China Department of Materials Science and Engineering City University of Hong Kong83 Tat Chee AvenueKowloon 999077Hong KongPeople’s Republic of China

Biocompatible devices are widely employed in modernized lives and medical fields in the forms of wearable and implantable devices,raising higher requirements on the battery biocompatibility,high safety,low cost,and excellent electrochemical performance,which become the evaluation criteria toward developing feasible biocompatible batteries.Herein,through conducting the battery implantation tests and leakage scene simulations on New Zealand rabbits,zinc sulfate electrolyte is proved to exhibit higher biosecurity and turns out to be one of the ideal zinc salts for biocompatible zinc-ion batteries(ZIBs).Furthermore,in order to mitigate the notorious dendrite growth and hydrogen evolution in mildly acidic electrolyte as well as improve their operating stability,Sn hetero nucleus is introduced to stabilize the zinc anode,which not only facilitates the planar zinc deposition,but also contributes to higher hydrogen evolution overpotential.Finally,a long lifetime of 1500 h for the symmetrical cell,the specific capacity of 150 mAh g^(-1)under 0.5 A g^(-1)for the Zn-MnO_(2)battery and 212 mAh g^(-1)under 5 A g^(-1)for the Zn—NH4V4O10 battery are obtained.This work may provide unique perspectives on biocompatible ZIBs toward the biosecurity of their cell components.

关键词： Aqueous zinc-ion batteries Biocompatible devices Operating stability Zinc anode Zinc salts electrolyte

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Exploring the effect of a low-carbon city pilot policies on carbon dioxide emission intensity:Based on the PSM-DID method

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Chinese Journal of Population,Resources and Environment 2022年第3期20卷 209-216页

作者： Yan Song Xiulian Chen Zhenran Li zhiyuan zeng Ming Zhang School of Economics and Management China University of Mining and TechnologyXuzhou221116China School of Economics and Management Xidian UniversityXi’an710126China School of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing210016China School of Economics Southwestern University of Finance and EconomicsChengdu611130China

In 2010,the National Development and Reform Commission launched the low-carbon city(LCC)pilot pro‐gram.The scope of the pilot program was then gradually expanded to address the dilemma concerning eco‐nomic development and low-carbon transition.Selecting the second batch of LCCs in China,this study uses a combination of propensity score matching and difference-in-differences models to determine the effect of LCC pilot policies on CO_(2) emission intensity.We also used the mediation effect model to further investigate its in‐ternal mechanism.The findings of the study are as follows.First,the LCC pilot policy plays an important role in reducing carbon emissions.Second,LCC pilots policies reduce CO_(2) emissions through intermediary paths of output adjustment and technological innovation.Third,our heterogeneity analysis reveals that cities with higher levels of economic growth and better levels of human capital have superior carbon emission reduction effects;lastly,non-resource-based cities have better carbon emission reduction effects.

关键词： Low-carbon city(LCC) Carbon emissions PSM-DID Output adjustment Technology innovation

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葫芦素B诱导人结直肠癌细胞铁死亡的分子机制研究

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食品工业科技 2024年第8期45卷 325-335页

作者：刘致远曾瑾子郑桐煜黄日明华南农业大学食品学院广东广州510642 广东医科大学第一临床医学院广东湛江524023

为了探究葫芦素B(Cucurbitacin B,CuB)的抗结肠癌活性,并明确铁死亡在CuB发挥抗癌作用中的关键作用及其分子机制。本文将人结肠癌细胞HCT-116作为研究对象,评价了CuB的抗结肠癌活性,检测了铁死亡相关指标如细胞内铁离子浓度、谷胱甘肽(G... 详细信息

为了探究葫芦素B(Cucurbitacin B,CuB)的抗结肠癌活性,并明确铁死亡在CuB发挥抗癌作用中的关键作用及其分子机制。本文将人结肠癌细胞HCT-116作为研究对象,评价了CuB的抗结肠癌活性,检测了铁死亡相关指标如细胞内铁离子浓度、谷胱甘肽(Glutathione,GSH)含量和乳酸脱氢酶(Lactatedehydrogenase,LDH)水平,并采用网络药理学分析、代谢组学分析、分子对接及分子动力学模拟,探究了CuB抑制结肠癌的作用机制。结果表明,CuB能显著(P<0.05)抑制人结肠癌细胞HCT-116增殖,半数抑制浓度(IC50)为64.48 nmol/L。此外,CuB可以降低细胞内GSH含量、促进总铁离子的积累和LDH的释放,并且铁死亡抑制剂Fer-1能够逆转CuB诱导的LDH释放。网络药理学分析和代谢组学分析结果表明,CuB抑制结肠癌的作用机制与铁死亡密切相关的谷胱甘肽代谢途径有关。随后,分子对接结果提示CuB能与谷胱甘肽代谢通路中的关键蛋白SLC7A11和GPX4分别以-4.819和-3.833的得分结合,分子动力学模拟结果表明CuB与SLC7A11的结合具有较好的结构稳定性、波动性以及能量稳定性。由此,本研究发现CuB可以通过诱导人结肠癌细胞HCT-116中铁死亡的发生来发挥抗癌作用。

关键词：葫芦素B 结肠癌铁死亡分子机制

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安宁缓和医疗门诊医护一体化全程管理模式的构建

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中国医学科学院学报 2024年第2期46卷 210-216页

作者：曾耀鑫宁晓红郑莹张志媛王奕又张雨康倩中国医学科学院北京协和医学院北京协和医院国际医疗部北京100730 中国医学科学院北京协和医学院北京协和医院缓和医学中心北京100730

目的构建科学、实用的安宁缓和医疗门诊医护一体化全程管理模式,为安宁缓和医疗门诊的运行及发展提供借鉴。方法基于文献分析、访谈、专家小组会议,初步确定安宁缓和医疗门诊医护一体化全程管理模式的基本框架,采用德尔菲专家函询法对1... 详细信息

目的构建科学、实用的安宁缓和医疗门诊医护一体化全程管理模式,为安宁缓和医疗门诊的运行及发展提供借鉴。方法基于文献分析、访谈、专家小组会议,初步确定安宁缓和医疗门诊医护一体化全程管理模式的基本框架,采用德尔菲专家函询法对18名从事安宁缓和医疗及医护联合门诊相关领域专家进行2轮专家函询。结果2轮专家函询问卷有效回收率均为100%,第1轮函询专家的权威系数为0.88,第2轮函询专家的权威系数为0.91。最终构建安宁缓和医疗门诊医护一体化全程管理模式,形成人员构成、工作结构、效果评价共3项一级指标,5项二级指标,62项三级指标。结论构建的安宁缓和医疗门诊医护一体化全程管理模式具有较强的科学性、创新性、延续性,可为安宁缓和医护联合门诊的运行及发展提供借鉴。

关键词：安宁缓和医疗医护一体化全程管理模式德尔菲法

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可感知脑起搏器在丘脑底核脑深部电刺激治疗帕金森病中的初步应用

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中华神经外科杂志 2024年第1期40卷 22-27页

作者：何平徐欣郑智元汤浩曾冉凌至培南开大学医学院天津300071 解放军总医院第一医学中心神经外科医学部北京100853 解放军总医院海南医院神经外科三亚572000 上海冬雷脑科医院神经外科上海201702

目的初步观察可感知脑起搏器(Percept PC)在丘脑底核(STN)脑深部电刺激(DBS)治疗帕金森病(PD)中的应用,并与Lead-DBS成像技术对比在开机程控中的作用。方法纳入2023年1-9月在解放军总医院第一医学中心神经外科医学部(10例)及其他两家医... 详细信息

目的初步观察可感知脑起搏器(Percept PC)在丘脑底核(STN)脑深部电刺激(DBS)治疗帕金森病(PD)中的应用,并与Lead-DBS成像技术对比在开机程控中的作用。方法纳入2023年1-9月在解放军总医院第一医学中心神经外科医学部(10例)及其他两家医院神经外科(5例)接受STN-DBS的原发性PD患者进行回顾性研究。其中Percept PC组5例、Lead-DBS组10例。Percept PC组根据监测到的电生理信息选择程控触点,β频段局部场电位(LFP)振幅最高的触点作为开机触点;Lead-DBS组由Lead-DBS成像软件辅助,针对核团内触点采用传统的方法开机程控。观察Percept PC的记录情况,比较两组首次开机程控情况。结果5例Percept PC组患者,术后开启Timeline功能,均记录到微毁损效应的LFP表现;通过"Survey"功能和"Streaming"功能观察到的LFP波动,确定开机触点和刺激电流后,5例患者的临床症状均有所改善。首次开机测试,Percept PC组与Lead-DBS组的程控耗时分别为(44.0±4.2)min、(63.9±6.2)min,测试中出现不良反应的次数[M(Q_(1),Q_(3))]分别为0(0,1)次、2(1,3)次,差异均有统计学意义(均P0.05)。结论STN-DBS治疗PD中应用可感知脑起搏器通过感知功能选择程控触点,可有效缓解患者的临床症状;与Lead-DBS成像技术辅助程控比较,开机程控时间短、发生不良反应的次数少。

关键词：帕金森病深部脑刺激法丘脑底核可感知的程控

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