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Efficient and stable PtFe alloy catalyst for electrocatalytic methanol oxidation with high resistance to CO

Journal of Energy Chemistry 2024年第3期90卷 327-336,I0008页

作者： qian Yang Sifan Zhang Fengshun Wu lihua Zhu Guang Li Mingzhi Chen An Pei Yingliang Feng Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry College of Chemistry and Chemical EngineeringFaculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000JiangxiChina College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005FujianChina

Direct methanol fuel cells(DMFC) are widely considered to be an ideal green energy conversion device but their widespread applications are limited by the high price of the Pt-based catalysts and the instability in terms of surface CO toxicity in long-term operation.Herein,the PtFe alloy nanoparticles(NPs) with small particle size(~4.12 nm) supported on carbon black catalysts with different Pt/Fe atomic ratios(Pt_(1)Fe_(2)/C,Pt_(3)Fe_(4)/C,Pt_(1)Fe_(1)/C,and Pt_(2)Fe_(1)/C) are successfully prepared for enhanced anti-CO poisoning during methanol oxidation reaction(MOR).The optimal atomic ratio of Pt/Fe for the MOR is 1:2,and the mass activity of Pt_(1)Fe_(2)/C(5.40 A mg_(Pt)^(-1)) is 13.5 times higher than that of conventional commercial Pt/C(Pt/C-JM)(0.40 A mg_(Pt)^(-1)).The introduction of Fe into the Pt lattice forms the PtFe alloy phase,and the electron density of Pt is reduced after forming the PtFe alloy.In-situ Fourier transform infrared results indicate that the addition of oxyphilic metal Fe has reduced the adsorption of reactant molecules on Pt during the MOR.The doping of Fe atoms helps to desorb toxic intermediates and regenerate Pt active sites,promoting the cleavage of C-O bonds with good selectivity of CO_(2)(58.1%).Moreover,the Pt_(1)Fe_(2)/C catalyst exhibits higher CO tolerance,methanol electrooxidation activity,and long-term stability than other Pt_(x)Fe_(y)/C catalysts.

关键词： Alloy catalyst PtFe Methanol oxidation In-situ FTIR CO resistance

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Hodgkin's lymphoma:2023 update on treatment

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Cancer Biology & Medicine 2024年第4期21卷 269-273页

作者： Sicong Zhang Xianming Liu Lanfang Li lihua Qiu Zhengzi qian Shiyong Zhou Xianhuo Wang Huilai Zhang Department of Lymphoma Tianjin Medical University Cancer Institute&HospitalNational Key Laboratory of Druggability Evaluation and Systematic Translational MedicineNational Clinical Research Center for CancerTianjin's Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinThe Sino-US Center for Lymphoma and Leukemia ResearchTianjin 300060China

Hodgkin's lymphoma(HL)is a common,malignant hematological tumor of the lymph nodes and lymphatic system,accounting for 10%of all lymphomas.HL comprises 2 main subtypes:classical HL(cHL)and nodular lymphocyte predomina... 详细信息

关键词： lymphoma treatment predominant

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Ammonium Metavanadate Fabricated by Selective Precipitation of Impurity Chemicals on Inorganic Flocculants

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Journal of Renewable Materials 2023年第4期11卷 1951-1961页

作者： Bo Shi Dandan Zhu Pengxiang Lei Ximin Li Hengbo Xiao lihua qian Shandong Aluminum Industry Corporation Limited ZiboChina Petroleam&Natural Gas Transport Corporation of China WuhanChina School of Chemistry and Chemical Engineering Hubei University of TechnologyWuhanChina School of Physics Huazhong University of Science and TechnologyWuhanChina

High purity ammonium metavanadate(NH_(4)VO_(3))is the most vital chemical to produce V2O5,VO2,VN alloy,VFe alloy and VOSO4,which have some prospective applications for high strength steel,smart window,infrared detector and imaging,large scale energy storage system.NH_(4)VO_(3)is usually produced by spontaneous crystallization from the aqueous solution due to its sharp dependence of solubility on the temperature.However,hazardous chemicals in industrial effluent,include phosphorate,silicate and arsenate,causing severe damage to the environment.In this work,these impurities are selectively precipitated onto inorganic flocculants,while the vanadate dissolved in an aqueous solution keeps almost undisturbed.Therefore,high purity NH_(4)VO_(3)is produced by the crystallization from the purified solution.By screening various flocculants and precipitating parameters,polyaluminum sulfate with an optimal amount of 50 g/L,is demonstrated to selectively remove phosphorate,silicate and arsenate,corresponding to the removing efficiency of 93.39%,97.11%and 88.31%,respectively.NH_(4)VO_(3)from the purified solution holds a purity of 99.21%,in comparison with 98.33%in the product from the crude solution.This purifying technology cannot only produce NH_(4)VO_(3)with high added value,but also reduce the environmental pollution of waste liquid.

关键词： Ammonium metavanadate flocculating agent phosphate arsenate cooling precipitation vanadium slag bayer alumina liquor

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Virtual reality-based cognitive-behavioural therapy for the treatment of anxiety in patients with acute myocardial infarction:a randomised clinical trial

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General Psychiatry 2024年第2期37卷 189-196页

作者： Yuanyuan Li Juan Peng Pingyuan Yang Jiajun Weng Yan'e Lu Jiajia Liu Shikun Xu lihua Guan Dong Huang Qibing Wang Juying qian Zexin Zhao Yabin Wei Junbo Ge Xiao Huang Department of Psychological Medicine Zhongshan Hospital Fudan UniversityShanghaiChina Department of Cardiology Zhongshan HospitalFudan UniversityShanghai Institute of Cardiovascular DiseasesNational Clinical Research Center for Interventional MedicineShanghaiChina Department of Psychological Medicine Shanghai Geriatric Medical CenterShanghaiChina School of Nursing Peking UniversityBeijingChina Beijing Key Laboratory of Drug Dependence Research National Institute on Drug DependencePeking UniversityBeijingChina

Background The presence of mental health conditions is pervasive in patients who experienced acute myocardial infarction(AMI),significantly disrupting their recovery.Providing timely and easily accessible psychological interventions using virtual reality-based cognitive-behavioural therapy(VR-CBT)could potentially improve both acute and long-term symptoms affecting their mental health.Aims We aim to examine the effectiveness of VR-CBT on anxiety symptoms in patients with AMI who were admitted to the intensive care unit(ICU)during the acute stage of their illness.Methods In this single-blind randomised clinical trial,participants with anxiety symptoms who were admitted to the ICU due to AMI were continuously recruited from December 2022 to February 2023.Patients who were Han Chinese aged 18-75 years were randomly assigned(1:1)via block randomisation to either the VR-CBT group to receive VR-CBT in addition to standard mental health support,or the control group to receive standard mental health support only.VR-CBT consisted of four modules and was delivered at the bedside over a 1-week period.Assessments were done at baseline,immediately after treatment and at 3-month follow-up.The intention-to-treat analysis began in June 2023.The primary outcome measure was the changes in anxiety symptoms as assessed by the Hamilton Anxiety Rating Scale(HAM-A).Results Among 148 randomised participants,70 were assigned to the VR-CBT group and 78 to the control group.The 1-week VR-CBT intervention plus standard mental health support significantly reduced the anxiety symptoms compared with standard mental health support alone in terms of HAM-A scores at both post intervention(Cohen’s d=−1.27(95%confidence interval(CI):−1.64 to−0.90,p<0.001)and 3-month follow-up(Cohen’s d=−0.37(95%CI:−0.72 to−0.01,p=0.024).Of the 70 participants who received VR-CBT,62(88.6%)completed the entire intervention.Cybersickness was the main reported adverse event(n=5).Conclusions Our results indicate that VR-CBT can significantly reduce post-AMI anxiety at t

关键词： admitted behaviour treatment

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Origin and the Hardening Mechanism of Twinned Lenticular Martensite in a Fe-33Ni Alloy

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Acta Metallurgica Sinica(English Letters) 2023年第6期36卷 899-905页

作者： Yong Li Zuohua Wang lihua qian Jian Zhao Wu Zhang Ping Wei Hongwang Zhang National Engineering Research Center for Equipment and Technology of Cold Strip Rolling College of Mechanical EngineeringYanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China School of Physics Huazhong University of Science and TechnologyWuhan 430074China China Copper Huazhong Copper Cooperation Limited Huangshi 435004China College of Weaponry Engineering Naval University of EngineeringWuhan 430033China

The twinned substructure of lenticular martensite in a quenched Fe–33Ni alloy was studied.In contrary to the traditional viewpoint that the twinned laths come from{112}deformation twins and show insignificant hardening,we demonstrate that they are actually originated from the twinned Kurdjumov Sachs(KS)variants and can give rise to 3–4 times hardening up to~420 HV(~130 HV for the starting sample).The underlying mechanisms responsible for the propensity for twinned variants and the carbon-independent hardening for Fe–Ni system were discussed.

关键词： Twinned variants Midrib Lenticular martensite Hardening mechanism Fe-33Ni

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A retrospective analysis of mature T-and NK-cell lymphomas

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Cancer Biology & Medicine 2024年第3期21卷 223-229页

作者： Junlei Jia Xiaohui Wang Zheng Song Shen Meng Yue Fei Jingwei Yu Xia Liu Xue Han Lanfang Li lihua Qiu Zhengzi qian Shiyong Zhou Wenchen Gong Bin Meng Xiubao Ren Xianhuo Wang Huilai Zhang National Key Laboratory of Druggability Evaluation and Systematic Translational Medicine and Department of LymphomaTianjin Medical University Cancer Institute&HospitalNational Clinical Research Center for CancerTianjin's Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinThe Sino-US Center for Lymphoma and Leukemia ResearchTianjin 300060China Department of Radiation Oncology Shandong Cancer Hospital and InstituteShandong First Medical University and Shandong Academy of Medical SciencesJinan 250117China Department of Pathology Department of Immunology/Biotherapy Tianjin Medical University Cancer Institute&HospitalNational Clinical Research Center for CancerTianjin's Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin 300060China

Mature T-and natural killer(NK)-cell lymphomas are heterogeneous groups of malignant lymphoid neoplasms arising from T and NK cells. The incidence of mature T-and NK-cell lymphomas is 2.1 per 100,000 people, according... 详细信息

关键词： lymphoma neoplasms killer

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Identification of twist-angle-dependent excitons in WS2/WSe2 heterobilayers

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National Science Review 2022年第6期9卷 56-63页

作者： Ke Wu Hongxia Zhong Quanbing Guo Jibo Tang Jing Zhang lihua qian Zhifeng Shi Chendong Zhang Shengjun Yuan Shunping Zhang Hongxing Xu School of Physics and Technology and Key Laboratory of Artificial Micro-and Nano-Structures of Ministry of Education Wuhan University School of Physics Huazhong University of Science and Technology The Institute for Advanced Studies Wuhan University Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou University

Stacking atomically thin films enables artificial construction of van der Waals heterostructures with exotic functionalities such as superconductivity, the quantum Hall effect, and engineered light-matter interactions.In particular, heterobilayers composed of monolayer transition metal dichalcogenides have attracted significant interest due to their controllable interlayer coupling and trapped valley excitons in moiré superlattices. However, the identification of twist-angle-modulated optical transitions in heterobilayers is sometimes controversial since both momentum-direct(K–K) and-indirect excitons reside on the low energy side of the bright exciton in the monolayer constituents. Here, we attribute the optical transition at ～1.35 eV in the WS2/WSe2heterobilayer to an indirect Γ–K transition based on a systematic analysis and comparison of experimental photoluminescence spectra with theoretical calculations. The exciton wavefunction obtained by the state-of-the-art GW-Bethe-Salpeter equation approach indicates that both the electron and hole of the excitons are contributed by the WS2layer. Polarization-resolved k-space imaging further confirms that the transition dipole moment of this optical transition is dominantly in-plane and is independent of the twist angle. The calculated absorption spectrum predicts that the so-called interlayer exciton peak coming from the K–K transition is located at 1.06 eV, but with a much weaker amplitude. Our work provides new insight into the steady-state and dynamic properties of twist-angle-dependent excitons in van der Waals heterostructures.

关键词： heterobilayers twist angle exciton indirect transition transition dipole moment

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Convective Assembly of Linear Gold Nanoparticle Arrays at the Micron Scale for Surface Enhanced Raman Scattering

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Nano Research 2011年第11期4卷 1117-1128页

作者： lihua qian Ronobir Mookherjee Nevada Nanotechnology Center Howard R. Hughes College of Engineering University of Nevada Las Vegas Nevada 89154-4026 USA Advanced Technologies Academy 2501 Vegas Drive Las Vegas NV 89106 USA

在类似于一支吸量管钢笔的写的行动的微米规模的一种对流集会技术与微米规模宽度和毫米规模长度为金 nanoparticle 脱衣的线性集会被开发了因为表面提高了散布的拉曼(重量的单位) 。有比 3 nm 小的 interparticle 差距的数组六角形地在... 详细信息

在类似于一支吸量管钢笔的写的行动的微米规模的一种对流集会技术与微米规模宽度和毫米规模长度为金 nanoparticle 脱衣的线性集会被开发了因为表面提高了散布的拉曼(重量的单位) 。有比 3 nm 小的 interparticle 差距的数组六角形地在吸量管尖端的附近被叠。叠的层的可变数字和装配 nanoparticles 的干净表面被优化吸量管尖端的速度获得。装配 nanoparticle 数组的重量的单位性质依靠他们的叠的数字和表面清洁。

关键词：表面增强拉曼散射金纳米粒子微米尺度纳米阵列线性汇编对流表面清洁度组装技术

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Melatonin decreases GSDME mediated mesothelial cell pyroptosis and prevents peritoneal fibrosis and ultrafiltration failure

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Science China(Life Sciences) 2024年第2期67卷 360-378页

作者： Hongxia Ruan Xuejuan Li Lina Zhou Zihan Zheng Rulin Hua Xu Wang Yuan Wang Yujie Fan Shuwen Guo lihua Wang Shafiq ur Rahman Ziwei Wang Yuyuan Wei Shuangyan Yu Rongzhi Zhang qian Cheng Jie Sheng Xue Li Xiaoyan Liu Ruqiang Yuan Xiaoyan Zhang Lihong Chen Guowang Xu Youfei Guan Jing Nie Hongqiang Qin Feng Zheng Advanced Institute for Medical Sciences Dalian Medical UniversityDalian 116044China Department of Nephrology Second HospitalDalian Medical UniversityDalian 116023China CAS Key Laboratory of Separation Science for Analytical Chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Chongqing International Institute for Immunology Chongqing 401320China Department of Nephrology Shenzhen HospitalSouthern Medical UniversityShenzhen 518101China Wuhu Hospital and Health Science Center East China Normal UniversityShanghai 200241China Peking University First Hospital Peking UniversityBeijing 100034China

Peritoneal fibrosis together with increased capillaries is the primary cause of peritoneal dialysis failure.Mesothelial cell loss is an initiating event for peritoneal fibrosis.We find that the elevated glucose concentrations in peritoneal dialysate drive mesothelial cell pyroptosis in a manner dependent on caspase-3 and Gasdermin E,driving downstream inflammatory responses,including the activation of macrophages.Moreover,pyroptosis is associated with elevated vascular endothelial growth factor A and C,two key factors in vascular angiogenesis and lymphatic vessel formation.GSDME deficiency mice are protected from high glucose induced peritoneal fibrosis and ultrafiltration failure.Application of melatonin abrogates mesothelial cell pyroptosis through a MT1R-mediated action,and successfully reduces peritoneal fibrosis and angiogenesis in an animal model while preserving dialysis efficacy.Mechanistically,melatonin treatment maintains mitochondrial integrity in mesothelial cells,meanwhile activating m TOR signaling through an increase in the glycolysis product dihydroxyacetone phosphate.These effects together with quenching free radicals by melatonin help mesothelial cells maintain a relatively stable internal environment in the face of high-glucose stress.Thus,Melatonin treatment holds some promise in preserving mesothelium integrity and in decreasing angiogenesis to protect peritoneum function in patients undergoing peritoneal dialysis.

关键词： melatonin mitochondria pyroptosis GSDME peritoneal fibrosis mTOR

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Research and Practice on the Construction of Professional Cluster in Application-Oriented Local Undergraduate Universities:Taking Environ-mental Chemical Engineering Professional Cluster in Pingdingshan University as an Example

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Asian Agricultural Research 2024年第2期16卷 36-39,42页

作者： Yanjiao LI Jiafei SU Xiaonan HU Hongsheng qian Weishuang TONG Shiping CHENG lihua XIE Zhilu ZHANG School of Chemical and Environmental Engineering Pingdingshan UniversityPingdingshan 467000China Henan Jingtong Glass Co. Ltd.Pingdingshan 467000China

Based on the analysis of the importance of professional cluster construction by ecological theory,with the change of social demand for talents,this paper explores the practice of environmental chemical professional cluster construction in Pingdingshan University,including gradually perfecting teaching conditions and reforming teaching mode,breaking through the limitations of resources,integrating the boundaries of colleges and departments,integrating multiple resources,innovating systems and mechanisms,reconstructing professional clusters,decon-structing professional connotations,reorganizing curriculum systems,etc.,in order to better build the ecological chain network of education in application-oriented colleges and universities,realize the deep integration of industry and education,train future-oriented interdisciplinary applied talents of new engineering,and realize the construction of characteristic professional cluster in application-oriented colleges.

关键词： Professional cluster Industrial cluster Talent demand Resource integration Structural adjustment Undergraduate universities

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