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Structure transformation induced bi-component Co–Mo/A-Co(OH)_(2)as highly efficient hydrogen evolution catalyst in alkaline media

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Nano Materials Science 2024年第5期6卷 565-575页

作者： yingqing ou Lu Liu Xiao Peng Lili Zhang Zhongwen ou Wendong Zhang Yunhuai Zhang School of Chemistry and Chemical Engineering Chongqing UniversityChongqing400044China Department of Chemistry National University of SingaporeSingapore117543Singapore Institute of Sustainability for Chemicals Energy and Environment(ISCE2)Agency for ScienceTechnology and Research in Singapore(A*STAR)Singapore627833Singapore School of Physics Chongqing UniversityChongqing400044China College of Chemistry Chongqing Normal UniversityChongqing401331China Materials Science and Engineering College Sichuan University of Science&EngineeringZigong643000China Department of Military Infrastructure Army Logistics University of PLAChongqing401311China

Elucidating the inherent origins of the sluggish hydrogen evolution reaction(HER)kinetics in alkaline media and developing high-performance electrocatalysts are fundamental for the advances of conventional alkaline water electrolyzers and emerging anion exchange membrane(AEM)*** we present a facile electrochemical modification strategy for the synthesis of bi-component Co–Mo_((18%))/A-Co(OH)_(2)catalyst toward efficient HER catalysis in alkaline *** Co–Mo alloys with adjustable Mo/Co atomic ratio are first prepared by H2-assisted cathodic *** virtue of the appropriate electronic structure and hydrogen binding energy,Co–Mo_((18%))is the most HER active among the alloys and is further activated by a constant-current electrochemical modification *** characterizations reveal the formation of amorphous Co(OH)_(2)nanoparticles on the *** analysis combined with theoretical calculations reveal that the in-situ formed Co(OH)_(2)can efficiently promote the water dissociation,resulting in accelerated Volmer-step *** a result,the Co–Mo_((18%))/A-Co(OH)_(2)simultaneously achieves the optimization of the two factors dominating alkaline HER activity,i.e.,water dissociation and hydrogen adsorption/desorption via the bifunctional synergy of the *** high HER activity(η10 of 47 mV at 10 mA cm^(-2))of Co–Mo_((18%))/A-Co(OH)_(2)is close to benchmark Pt/C catalyst and comparable or superior to the most active non-noble metal catalysts.

关键词： Co-Mo_((18%))/A-Co(OH)_(2) Electrochemical modification Water dissociation Alkaline HER

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Surface structural engineering of carbonyl iron powder for enhancing microwave absorption and anti-oxidation performance

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Journal of Materials Science & Technology 2024年第11期178卷 201-209页

作者： Ming-Lu Huang Cheng-Long Luo Chang Sun Kun-Yan Zhao yingqing ou Ming Wang Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China Department of Chemistry National University of Singapore3 Science Drive 3117543Singapore

Surface structural engineering is desirable in modifying the surface performance of carbonyl iron powder(CIP)to enhance microwave absorption(MA)and anti-oxidation ***,the surface shape-dependent CIP absorbers are designed via surface coating with zinc oxide(ZnO)nanoparticles and then a thermal annealing *** morphology of ZnO nanoparticles which can be easily regulated by controlling the annealing temperature ultimately affects the MA performance of CIP coating with ZnO nanoparticles(CIP@ZnO).The core-shell CIP@ZnO particles with cubic cone ZnO nanoparticles exhibit ex-cellent MA performance and thermal stability in comparison to the original ***,the CIP@ZnO annealed at 350 ℃(CIP@ZnO-350)samples which have the cubic cone ZnO nanoparticles exhibit a min-imum reflection loss(RLmin)of-55.35 dB at a thickness of 2.1 mm and a maximum effective absorp-tion bandwidth(EAB)of 7.09 GHz at a thickness of 2.0 *** addition,the antioxidant property of the CIP@ZnO composite particles is abruptly enhanced,which breaks the restriction of the application of CIP at high *** superior MA performance of CIP@ZnO particles with cubic cone ZnO nanoparti-cles comes from the enhancement in surface shape-dependent multiple microwave scattering,interfacial polarization,and electromagnetic-dielectric synergism between ZnO and CIP.

关键词： Microwave absorption Carbonyl iron powder Anti-oxidation Interfacial polarization Surface structural engineering

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Effects of surface chlorine atoms on charge distribution and reaction barriers for photocatalytic CO_(2)reduction

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Nano Materials Science 2024年第2期6卷 235-243页

作者： Wendong Zhang Wenjun Ma Yuerui Ma Peng Chen Qingqing Ye Yi Wang Zhongwei Jiang yingqing ou Fan Dong Chongqing Key Laboratory of Green Synthesis and Application&Chongqing Key Laboratory of Inorganic Functional Materials College of ChemistryChongqing Normal UniversityChongqing401331China Suzhou Industrial Technology Research Institute of Zhejiang University Jiangsu215000China Department of Chemistry Faculty of ScienceNational University of SingaporeSingapore117543Singapore Yangtze Delta Region Institute(Huzhou)&Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaHuzhou313001China

Photocatalytic CO_(2)reduction to produce high value-added carbon-based fuel has been proposed as a promising approach to mitigate global warming ***,the conversion efficiency and product selectivity are still low due to the sluggish dynamics of transfer processes involved in proton-assisted multi-electron *** the formation energy barriers of intermediate products is an effective method to enhance the selectivity and productivity of final *** this study,we aim to regulate the surface electronic structure of Bi_(2)WO_(6)by doping surface chlorine atoms to achieve effective photocatalytic CO_(2)*** Cl atoms can enhance the absorption ability of light,affect its energy band structure and promote charge *** with DFT calculations,it is revealed that surface Cl atoms can not only change the surface charge distribution which affects the competitive adsorption of H_(2)O and CO_(2),but also lower the formation energy barrier of intermediate products to generate more intermediate*COOH,thus facilitating CO ***,this study demonstrates a promising surface halogenation strategy to enhance the photocatalytic CO_(2)reduction activity of a layered structure Bi-based catalyst.

关键词： Surface chlorine atoms Charge distribution Reaction barriers Photocatalytic CO_(2)reduction Bi_(2)WO_(6)

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Oxygen Electrocatalysis on Mixed-Metal Oxides/Oxyhydroxides:From Fundamentals to Membrane Electrolyzer Technology

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Accounts of Materials Research 2021年第7期2卷 548-558页

作者： Raina A.Krivina yingqing ou Qiucheng Xu Liam P.Twight T.Nathan Stovall Shannon W.Boettcher Department of Chemistry and Biochemistry and the Oregon Center for Electrochemistry University of OregonEugeneOregon 97403United States College of Chemistry and Chemical Engineering Chongqing UniversityChongqingChina Department of Materials Science East China University of Science and TechnologyShanghaiChina

CONSPECTUS:Catalyzing the oxygen evolution reaction(OER)is important for key energy-storage technologies,particularly water electrolysis and photoelectrolysis for hydrogen fuel *** neutral-to-alkaline conditions,first-row transitionmetal oxides/(oxy)hydroxides are the fastest-known OER catalysts and have been the subject of intense study for the past *** to their high performance is the intentional or accidental addition of Fe to Ni/Co oxides that convert to layered(oxy)hydroxide structures during the *** the role that Fe plays in the catalysis and the molecular identity of the true“active site”has proved challenging,however,due to the dynamics of the host structure and absorbed Fe sites as well as the diversity of local structures in these disordered active *** this Account,we highlight our work to understand the role of Fe in Ni/Co(oxy)hydroxide OER *** first discuss how we characterize the intrinsic activity of the first-row transition-metal(oxy)hydroxide catalysts as thin films by accounting for the contributions of the catalyst-layer thickness(mass loading)and electrical conductivity as well as the underlying substrate’s chemical interactions with the catalyst and the presence of Fe species in the *** show how Fe-doped Ni/Co(oxy)hydroxides restructure during catalysis,absorb/desorb Fe,and in some cases degrade or regenerate their activity during electrochemical *** highlight the relevant techniques and procedures that allowed us to better understand the role of Fe in activating other first-row transition metals for *** find several modes of Fe incorporation in Ni/Co(oxy)hydroxides and show how those modes correlate with activity and *** also discuss how this understanding informs the incorporation of earthabundant transition-metal OER catalysts in anion-exchange-membrane water electrolyzers(AEMWE)that provide a locally basic anode environment but run on pure water and have advan

关键词： hydroxide catalyst catalysis

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大尺寸高端显示器件用薄膜晶体管Al–Mo复合电极坡度的形成过程与可控调节

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中国科学：化学 2023年第10期53卷 2079-2088页

作者：刘丹欧忠文方亮黄中浩李砚秋熊永林鸿涛欧影轻刘璐软凝聚态物理及智能材料研究重庆市重点实验室重庆大学物理学院重庆400044 中国人民解放军陆军勤务学院重庆401331 重庆京东方光电科技有限公司重庆400700 北京京东方显示技术有限公司北京100176 重庆大学溧阳智慧城市研究院江苏213300

栅极坡度角(PA)对薄膜晶体管(TFT)性能和良率具有重要影响,如何将坡度角调节到合适的范围是TFT量产中关键技术之一.本文以大尺寸高端显示器件用a-Si TFT的Al/Mo、Mo/Al/Mo电极在磷酸系溶液下刻蚀得到的坡度角为研究对象,探究了膜层结构... 详细信息

栅极坡度角(PA)对薄膜晶体管(TFT)性能和良率具有重要影响,如何将坡度角调节到合适的范围是TFT量产中关键技术之一.本文以大尺寸高端显示器件用a-Si TFT的Al/Mo、Mo/Al/Mo电极在磷酸系溶液下刻蚀得到的坡度角为研究对象,探究了膜层结构、Mo厚度、刻蚀时间对坡度角的影响.结果表明:在Al/Mo结构中,随着顶Mo厚度增加,Al与光刻胶之间的间隙增加,刻蚀液更易侵入,侧向刻蚀增强,坡度角减小;在Mo/Al/Mo三层电极结构中,随着底Mo厚度增加,底Mo和中间临近的Al侧壁发生电偶腐蚀,Al侧壁上形成氧化物钝化层,Al刻蚀速率减慢,坡度角变小.水池效应将导致刻蚀液残留在电极底部,阻碍新鲜刻蚀液与底部接触,底部刻蚀速率低于顶部;故当刻蚀时间延长时,底部和顶部刻蚀速率差进一步增大,导致坡度角减小.得到了Mo/Al/Mo坡度角与顶Mo和底Mo厚度回归方程,为调节坡度角和优选Mo厚度提供了依据.此电极坡度角的调节技术可为确保TFT的良率和性能提供参考.

关键词：薄膜晶体管 Al电极坡度角叠层结构水池效应电偶腐蚀

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Transfer RNA-derived small RNA serves as potential non-invasive diagnostic marker and a novel therapeutic target for acute pancreatitis

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World Journal of Gastroenterology 2025年第1期31卷 152-156页

作者： Jing Zhang Chun-Lin ou Department of Immunology School of Basic MedicineCentral South UniversityChangsha 410000Hunan ProvinceChina Department of Pathology Xiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina

Transfer RNA(tRNA)-derived fragments,a new type of tRNA-derived small RNA(tsRNA),can be cleaved from tRNA by enzymes to regulate target gene expression at the transcriptional and translational *** are not only degradation fragments but also have biological functions,including those in immune inflammation,metabolic disorders,and cell *** dysregulation is closely associated with multiple diseases,including various cancers and acute pancreatitis(AP).AP is a common gastrointestinal disease,and its incidence increases *** development is associated with tsRNAs,which regulate cell injury and induce inflammation,especially pyroptosis and ***,serum tRF36 has the potential to serve as a non-invasive diagnostic biomarker and leads to pancreatic acinar cell ferroptosis causing inflammation to promote *** show the characteristics of tsRNAs and their diagnostic value and function in AP,and discuss the potential opportunities and challenges of using tsRNAs in clinical applications and research.

关键词： Transfer RNA derived small RNAs Acute pancreatitis Liquid biopsy Biomarker Cell pyroptosis Ferroptosis

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Exercise preconditioning alleviates ischemia-induced memory deficits by increasing circulating adiponectin

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Neural Regeneration Research 2025年第5期20卷 1445-1454页

作者： Meifeng Zheng Borui Zhang Sonata S Y Yau Kwok-Fai So Li Zhang Haining ou Department of Rehabilitation Medicine Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Medicine The Fifth Clinical College of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of CNS Regeneration(Ministry of Education) Guangdong-Hong Kong-Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina State Key Laboratory of Brain and Cognitive Science Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina Center for Exercise and Brain Science School of PsychologyShanghai University of SportShanghaiChina Neuroscience and Neurorehabilitation Institute University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina

Cerebral ischemia is a major health risk that requires preventive approaches in addition to drug *** exercise enhances neurogenesis and synaptogenesis,and has been widely used for functional rehabilitation after *** this study,we determined whether exercise training before disease onset can alleviate the severity of cerebral *** also examined the role of exercise-induced circulating factors in these *** mice were subjected to 14 days of treadmill exercise training before surgery for middle cerebral artery *** found that this exercise pre-conditioning strategy effectively attenuated brain infarct area,inhibited gliogenesis,protected synaptic proteins,and improved novel object and spatial memory *** analysis showed that circulating adiponectin plays a critical role in these preventive effects of *** activation of adiponectin receptors by Adipo Ron mimicked the effects of exercise,while inhibiting receptor activation abolished the exercise *** summary,our results suggest a crucial role of circulating adiponectin in the effects of exercise pre-conditioning in protecting against cerebral ischemia and supporting the health benefits of exercise.

关键词： adiponectin cerebral ischemia exercise pre-conditioning hippocampus memory function middle cerebral artery occlusion prefrontal cortex synaptic proteins treadmill exercise

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突发化学中毒事件应急桌面推演实施效果分析

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职业卫生与应急救援 2018年第5期36卷 439-441页

作者：陈婉霞黄燕玲谢迎庆欧美英李红丽佛山市职业病防治所广东佛山528000

[目的]分析突发化学中毒事件应急桌面演练的效果,为加强城市卫生应急能力建设,探索全面、可行的演练模式提供参考。[方法]对佛山市举办的一起突发化学中毒事件应急桌面演练的设计与实施过程进行总结与效果分析。[结果]来自市、区职业病... 详细信息

[目的]分析突发化学中毒事件应急桌面演练的效果,为加强城市卫生应急能力建设,探索全面、可行的演练模式提供参考。[方法]对佛山市举办的一起突发化学中毒事件应急桌面演练的设计与实施过程进行总结与效果分析。[结果]来自市、区职业病防治机构共6支队伍参加了演练,各队伍的演练平均得分为77.5分(满分100分)。各应急队伍对情景与题目的考虑均较全面,对处置方法与流程较熟悉,但在处置细节上存在照搬规范、预案的情况,不够贴近案例情景。[结论]演练的举行完成了对队伍应急能力的考核,达到了锻炼队伍、磨合机制的应急演练目的。通过演练获取的实战经验和要害暴露问题,需在今后的培训与演练中有针对性地进行提高或改正。

关键词：突发化学中毒事件桌面演练疾控中心场景模拟

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Early identification of stroke through deep learning with multi-modal human speech and movement data

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Neural Regeneration Research 2025年第1期20卷 234-241页

作者： Zijun ou Haitao Wang Bin Zhang Haobang Liang Bei Hu Longlong Ren Yanjuan Liu Yuhu Zhang Chengbo Dai Hejun Wu Weifeng Li Xin Li School of Computer Science and Engineering Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Department of Neurology Guangdong Neuroscience InstituteGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina Department of Emergency Medicine Guangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhouGuangdong ProvinceChina

Early identification and treatment of stroke can greatly improve patient outcomes and quality of *** clinical tests such as the Cincinnati Pre-hospital Stroke Scale(CPSS)and the Face Arm Speech Test(FAST)are commonly used for stroke screening,accurate administration is dependent on specialized *** this study,we proposed a novel multimodal deep learning approach,based on the FAST,for assessing suspected stroke patients exhibiting symptoms such as limb weakness,facial paresis,and speech disorders in acute *** collected a dataset comprising videos and audio recordings of emergency room patients performing designated limb movements,facial expressions,and speech tests based on the *** compared the constructed deep learning model,which was designed to process multi-modal datasets,with six prior models that achieved good action classification performance,including the I3D,SlowFast,X3D,TPN,TimeSformer,and *** found that the findings of our deep learning model had a higher clinical value compared with the other ***,the multi-modal model outperformed its single-module variants,highlighting the benefit of utilizing multiple types of patient data,such as action videos and speech *** results indicate that a multi-modal deep learning model combined with the FAST could greatly improve the accuracy and sensitivity of early stroke identification of stroke,thus providing a practical and powerful tool for assessing stroke patients in an emergency clinical setting.

关键词： artificial intelligence deep learning diagnosis early detection FAST screening stroke

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光照不均匀条件下无人机航拍低照度图像增强方法

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现代电子技术 2025年第1期48卷 55-59页

作者：黄静欧余韬桂林电子科技大学计算机工程学院广西北海536000

增强图像时高低频参数未增强,没有更好地保留图像的细节和平衡图像的亮度,因此,提出一种光照不均匀条件下无人机航拍低照度图像增强方法。首先通过高斯滤波预处理无人机航拍图像,实现无人机航拍图像中的噪声抑制,将预处理后的图像通过... 详细信息

增强图像时高低频参数未增强,没有更好地保留图像的细节和平衡图像的亮度,因此,提出一种光照不均匀条件下无人机航拍低照度图像增强方法。首先通过高斯滤波预处理无人机航拍图像,实现无人机航拍图像中的噪声抑制,将预处理后的图像通过小波分解得到图像的高频参数和低频参数,分别通过双边滤波算法、软阈值方法和直方图对图像的低频参数和高频参数进行增强,采用小波重构对增强后的图像高频参数和低频参数进行重构,得到增强后的无人机航拍图像。通过实验验证,该方法能够实现一种效果较好的图像增强,在原始图像基础上,通过文中方法增强原始亮度8.14%、对比度提高了37.90%以及清晰度增加了31.01%,使得图像的整体质量得到了显著提升,为后续的图像分析、处理提供了更加准确、丰富的信息。

关键词：无人机航拍低照度图像增强高斯滤波小波分解与重构双边滤波算法软阈值方法

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