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A Pt-Bi bimetallic nanoparticle catalyst for direct electro- oxidation of formic acid in fuel cells

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Frontiers of Environmental Science & Engineering 2013年第3期7卷 388-394页

作者： Shu-Hong LI Yue ZHAO Jian chu Wen-Wei LI Han-Qing YU Gang LIU Yang-chao TIAN Department of Chemistry University of Science and Technology of China Hefei 230026 China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230026 China

Direct formic acid fuel cells are a promising portable power-generating device, and the development of efficient anodic catalysts is essential for such a fuel cell. In this work Pt-Bi nanoparticles supported on micro-fabri- cated gold wire array substrate were synthesized using an electrochemical deposition method for formic acid oxida- tion in fuel cells. The surface morphology and element components of the Pt-Bi/Au nanoparticles were character- ized, and the catalytic activities of the three Pt-Bi/Au nanoparticle electrodes with different Pt/Bi ratios for formic acid oxidation were evaluated. It was found that Pt4Bi96/Au had a much higher catalytic activity than Pt11Bis89/Au and Pt13Bis87/Au, and Pt4Bi96/Au exhibited a current density of ***^-2, which was 27-times greater than that of Pt/Au. The electro-catalytic activity of the Pt-Bi/Au electrode for formic acid oxidation increased with the increasing Bi content, suggesting that it would be possible to achieve an efficient formic acid oxidation on the low Pt-loading. Therefore, the Pt-Bi/Au electrode offers a promising catalyst with a high activity for direct oxidation of formic acid in fuel cells.

关键词： catalyst electrochemical deposition formicacid oxidation fuel cell gold wire array microfabrication

Genome-wide scan for oil quality reveals a coregulation mechanism of tocopherols and fatty acids in soybean seeds

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Plant Communications 2023年第5期4卷 234-245页

作者： Danni chu Zhifang Zhang Yang Hu chao Fang Xindan Xu Jia Yuan Jinsong Zhang Zhixi Tian Guodong Wang State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed DesignChinese Academy of SciencesBeijing 100101China State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyThe Innovative Academy of Seed DesignChinese Academy of SciencesBeijing 100101China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100039China Present address:Department of Plant Biology Michigan State UniversityEast LansingMI 48824USA

Tocopherols(vitamin E)play essential roles in human health because of their antioxidant activity,and plantderived oils are the richest sources of tocopherols in the human *** soybean(Glycinemax)is one of themain sources of plant-derived oil and tocopherol in the world,the relationship between tocopherol and oil in soybean seeds remains ***,we focus on dissecting tocopherol metabolism with the longterm goal of increasing a-tocopherol content and soybean oil *** first collected tocopherol and fatty acid profiles in a soybean population(>800 soybean accessions)and found that tocopherol content increased during soybean domestication.A strong positive correlation between tocopherol and oil content was also *** tocopherol pathway–related lociwere identified using a metabolite genome-wide association study *** variations in three tocopherol pathway genes were responsible for total tocopherol content and composition in the soybean population through effects on enzyme activity,mainly caused by non-conserved amino acid substitution or changes in gene transcription ***,the fatty acid regulatory transcription factor GmZF351 directly activated tocopherol pathway gene expression,increasing both fatty acid and tocopherol contents in soybean *** study reveals the functional differentiation of tocopherol pathway genes in soybean populations and provides a framework for development of new soybean varieties with high a-tocopherol content and oil quality in seeds.

关键词： soybean fatty acid tocopherol vitamin E mGWAS oil quality

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增程式电动拖拉机动力电池供电系统研究

农机化研究 2025年第2期47卷 216-221页

作者：初香港王宝超乔明睿青岛农业大学机电工程学院山东青岛266109

增程式电动拖拉机具有节能减排、续航时间长等优点,但现有动力电池组电压等级较低,无法满足增程式电动拖拉机整机直流母线电压需求。为此,针对增程式电动拖拉机整机500 V电压平台需求,研究了其动力电池供电系统,完成了动力电池供电系统... 详细信息

增程式电动拖拉机具有节能减排、续航时间长等优点,但现有动力电池组电压等级较低,无法满足增程式电动拖拉机整机直流母线电压需求。为此,针对增程式电动拖拉机整机500 V电压平台需求,研究了其动力电池供电系统,完成了动力电池供电系统硬件设计和控制设计,最终利用MatLab/Simulink进行了仿真验证。仿真试验方面,所设计的动力电池供电系统实现了从320 V到500 V良好的升压稳压控制与闭环直流电源供电效果,能够适应与增程器等其他电源并联均流供电需求,动力电池供电系统具有良好的动态性能和稳态性能,满足稳定供电需求。

关键词：增程式电动拖拉机动力电池供电双闭环控制动态仿真

NaF assisted preparation and the improved corrosion resistance of high content ZnO doped plasma electrolytic oxidation coating on AZ31B alloy

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Journal of Magnesium and Alloys 2024年第9期12卷 3602-3615页

作者： chao Yang Jian Huang Suihan Cui Ricky Fu Liyuan Sheng Daokui Xu Xiubo Tian Yufeng Zheng Paul K.chu Zhongzhen Wu School of Advanced Materials Peking University Shenzhen Graduate SchoolShenzhen 518055China Department of Physics Department of Materials Science&Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong Kong 999077China Shenzhen Institute Peking UniversityShenzhen 518057China PKU-HKUST ShenZhen-HongKong Institution Shenzhen 518057China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

In the present research,the NaF assisted plasma electrolytic oxidation(PEO)is designed to fabricate the high-content ZnO nanoparti-cles doped coating on AZ31B *** microstructure,phase constituents and corrosion behavior of the PEO coatings are investigated *** results reveal that the introduction of NaF promotes the formation of MgF2 nanophases in the passivation layer on Mg alloy,decreasing the breakdown voltage and discharge *** a result,the continuous arcing caused by high discharge voltage is *** the increasing of NaF content,the Zn content in the PEO coating is enhanced and the pore size in the coating is decreased *** to the high-content ZnO doping,the PEO coating protected AZ31B alloy demonstrates the better corrosion *** with the bare AZ31B alloy,the high-content ZnO doped PEO coated sample shows an increased corrosion potential from-1.465 V to-1.008 V,a decreased corrosion current density from 3.043×10^(-5) A·cm^(-2) to 3.960×10^(-8) A·cm^(-2) and an increased charge transfer resistance from 1.213×10^(2) ohm·cm^(2) to 2.598×10^(5) ohm·cm^(2).Besides,the high-content ZnO doped PEO coated sample also has the excellent corrosion resistance in salt solution,exhibiting no obvious corrosion after more than 2000 h neutral salt spraying and 28 days’immersion *** improved corrosion resistance can be ascribed to the relative uniform distribution of ZnO in PEO coating which can transform to Zn(OH)2 and form a continuous protective layer along the corrosion interface.

关键词： AZ31B alloy Plasma electrolytic oxidation(PEO) ZnO doping NaF Corrosion resistant

Comparison of pyrolysis characteristics of two Chinese oil shales based onthe migration and conversion of organic carbon

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Carbon Resources Conversion 2018年第3期1卷 209-217页

作者： Zhi-bing Chang Mo chu chao Zhang Shu-xia Bai Sheng-tao Wang Bao-man Liu School of Chemical and Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China

In this study,the Huadian oil shale(HD-R)and Balikun oil shale(BLK-R)were pyrolyzed in a fixed-bed pyrolyzer at 360–530℃.Based on the migration and conversion of organic carbon,their pyrolysis characteristics were investigated and *** aliphaticity of Huadian kerogen(HD-K)and Balikun kerogen(BLK-K)are 80.53%and 52.83%,*** HD-K contains more C=O,which will render the depolymerization and decomposition of kerogen to occur at low temperatures to produce volatile ***,the cumulative conversion of the Huadian shale oil is greater than the Balikun shale oil at 390–435℃.The aliphatic carbons of the BLK-K are mainly present as short methylene chains attached to aromatic *** will leave the kerogen matrix with the breakage of relatively weaker CeC bonds at β-sites from aromatic rings at medium *** contrast,aliphatic carbons of the HD-K are dominated by long aliphatic *** temperature is necessary to break other stronger CeC to form shale oil and gaseous species,which appears to make the oil accumulation conversion of BLK-R exceed that of HD-R at 450–510℃.

关键词： Oil shale Pyrolysis Kerogen Organic carbon Thermal bitumen Shale oil

Massive left atrial and interatrial septal calcification after mitral valve replacement

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Chinese Medical Journal 2008年第15期121卷 1497-1499页

作者： Yu-Shen Lin Feng-chun Tsai Pao-hsien chu The First Cardiovascular Division Department of Internal Medicine Chang Gung Memorial Hospital Taipei Taiwan China Division of Thoracic & Cardiovascular Surgery Chang Gung Memorial Hospital Chang Gung University College of Medicine Taipei Taiwan China

Massive calcification of left atrium is an uncommon complication of long-standing rheumatic valvular disease, and is most often observed in patients with a previous operation on mitral valve. Most patients have experienced symptoms for more than 15 years. Massive calcification of the left atrium generality spared the interatrial septum in the previous studies. However, to our knowledge, fewer than five cases have presented as full left atrial calcification （Table）.

关键词： calcification left atrial interatrial septal mitral valve replacement

A review on pavement distress and structural defects detection and quantification technologies using imaging approaches

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第2期9卷 135-150页

作者： chu chu Linbing Wang Haocheng Xiong National Center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China Department of Civil&Environmental Engineering Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China

Pavement distress detection(PDD)plays a vital role in planning timely pavement maintenance that improves pavement service *** order to promote the development of PDD technologies and find out the insufficiencies in PDD field,this paper reviews the technical development history and characteristics of various PDD technologies,which contributes to the current state of research on ***,processes of PDD are briefly *** PDD technologies based on radar ranging,2D image,laser ranging and 3 D structured light are *** newest 3D PDD technology based on interference fringe,which has better accuracy,is in *** principles and implementation processes of these methods are ***,the shortcomings of these technologies in the field of PDD are *** for future development are *** research results show that various PDD technologies have been continuously improved,developed,over the past decade,and have achieved a series of ***,the measurements from existing PDD technologies can not be metrological traced to acquire the true dimensions of pavement *** lack of metrological traceability technology in the PDD field needs to be further *** order to achieve more accurate and efficient PDD,the metrological traceability technology of PDD systems has become the future development direction in this field.

关键词： Pavement service life Pavement distress detection Metrological traceability Development direction

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Gear downshift control of inverse-automatic mechanical transmission of electric vehicle

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Green Energy and Intelligent Transportation 2022年第1期1卷 52-62页

作者： Jinlong Hong chao Zhang Hankun chu Bingzhao Gao Hao Wu Guangjie Wei Hua Liu Fuguo Xu Postdoctoral Station of Mechanical Engineering School of Automotive StudiesTongji UniversityShanghai201804China Qingdao Laiji Transmission System Technology Co. LtdQingdao United Automotive Electronic Systems Co. Ltd.Shanghai201206China New Energy Vehicle Engineering Center Tongji UniversityShanghai201804China Jiangling Motors Co. Ltd.Nanchang330052China Nanchang Automotive Institute of Intelligence&New Energy Tongji UniversityNanchang330052China Intelligent Robotics Center Advanced Research LaboratoriesTokyo City UniversityJapan

In order to improve the driving dynamics and riding comfort of pure electric vehicles,taking a two-speed I-AMT(Inverse-Automatic Mechanical Transmission)with rear friction clutch as the research object,a gear shift strategy,which consists of the open-loop control of the clutch position control and the closed-loop control of the drive motor speed control,is *** the inherent time-delay and external disturbances within the motor speed adjustment system,a two DOF(degree-of-freedom)Smith predictor with feedforward input is designed to track the target speed of the drive *** feedforward input is used to eliminate the influence of clutch sliding friction on the motor speed control,while the feedback speed tracking controller is applied to realize the speed tracking performance with the existence of time-delay and the external *** order to verify the effectiveness of the gear shift control strategy and the accuracy of the two DOF Smith controller with feedforward control,simulation results comparison is firstly carried out to illustrate the effectiveness of the control ***,a light pure electric vehicle equipped with I-AMT was used for downshift experiments under large throttle,which is the most difficult working scenario to control the *** experimental results show that the two DOF Smith controller can eliminate the influence of time-delay on the closed-loop control,and the proposed whole gear shift control strategy can limit the clutch slippage time within 1.5 s,resulting in a smaller shift jerk,thus guarantee the driving dynamics and riding comfort simultaneously.

关键词： Gear shift control Pure electric vehicle Inverse-automatic mechanical transmission Two-degree-of-freedom smith controller

Refeeding syndrome in Southeastern Taiwan:Our experience with 11 cases

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World Journal of Gastroenterology 2014年第30期20卷 10525-10530页

作者： Li-Ju Chen Huan-Lin Chen Ming-Jong Bair Chia-hsien Wu I-Tsung Lin Yuan-Kai Lee Cheng-Hsin chu Department of Nutrition Mackay Memorial Hospital Division of Gastroenterology Department of Internal MedicineMackay Memorial Hospital Department of Nursing Meiho University Department of Pharmacy and Graduate Institute of Pharmaceutical Technology Tajen University Department of Nutrition and Gastroenterology Mackay Memorial Hospital Mackay Junior College of Medicine Nursingand Management College

AIM: To present our experience with refeeding syndrome in southeastern Taiwan.

关键词： Refeeding syndrome Nutrition status Cachexia Hypophosphatemia Risk assessment