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| 1 | Highway constructions on the Qinghai-Tibet Plateau:Challenge,research and practice显示文摘Highway constructions on the Qinghai-Tibet Plateau(QTP)face great challenges induced by the unique local environmental,geological,and engineering conditions.The large area of permafrost,great temperature variability,strong UV rays,and complex geological conditions are the major factors that adversely influence the longterm performance of pavement systems.Since 1960s,Chinese engineers and researchers have started conducting research on the QTP to enhance the performance and durability of pavement systems.The present paper provide a comprehensive review of challenge,research and practice of highway constructions on the QTP including the special environmental and geological conditions,history of highway constructions on the QTP,major challenges and the state-of-the-art technology of subgrade constructions on permafrost,developments of the pavement structures and materials,performance prediction and maintenance methods of pavement surfaces,and applications of the research achievements on the first expressway on the QTP(i.e.,Gongyu Expressway).Based on the comprehensive literature review,it can be found that(1)frost heave and thaw weakening induced subgrade disease and longitudinal cracks on the pavement surface are complex coupled water-thermal-load problems.Engineering solutions are focusing on active cooling and thermal insulation methods,which can help to reduce temperature variations in the subgrade and thus improving its stability,(2)the harsh environmental and construction conditions may reduce the early strength and induce premature damage of cement-treated base materials.Some field validations showed that geocell-reinforced or asphalt-treated flexible base materials can provide better long-term performance,(3)the large temperature variability and strong UV rays can significantly accelerate aging of asphalt binders and greatly reduce the service life of asphalt mixtures.Various binder modification methods were developed for improving their viscoelasticity and enhance the low-temperature cracking resistance of pavement surface materials but are still lack of field validation data and comparisons of their life cycle costs.Therefore,it is recommended that a demonstration research project build test sections to examine a range of pavement structures and materials,and compare their long-term performance and life cycle costs,which can serve as important reference for future highway constructions on the QTP. | Aimin Sha Biao Ma Hainian Wang Liqun Hu Xuesong Mao Xilan Zhi Huaxin Chen Yu Liu Feng Ma Zhuangzhuang Liu Rui He Wei Si Xuhao Wang Cheng Li | 2022 | Journal of Road Engineering2022，2，1： | 4 |
| 2 | Recent advances and perspectives for Zn-based batteries:Zn anode and electrolyte显示文摘Zn-based batteries have attracted extensive attention due to their high theoretical energy density,safety,abundant resources,environmental friendliness,and low cost.They are a new energy storage and conversion technology with significant development potential and have been widely used in renewable energy and portable electronic devices.Considerable attempts have been devoted to improving the performance of Zn-based batteries.Specifically,battery cycle life and energy efficiency can be improved by electrolyte modification and the construction of highly efficient rechargeable Zn anodes.This review compiles the progress of the research related to Zn anodes and electrolytes,especially in the last five years.This review will introduce fundamental concepts,summarize recent development,and inspire further systematic research for high-performance Zn-based batteries in the future. | Huaiyun Ge Xilan Feng Dapeng Liu Yu Zhang | 2023 | Nano Research Energy2023，2，1： | 3 |
| 3 | A study of SVDD-based algorithm to the fault diagnosis of mechanical equipment system显示文摘 | Jiang Zhiqiang Feng Xilan Feng Xianzhang | 2012 | Physics Procedia2012，33，： | 1 |
| 4 | Preparation of Quaternary FeCoMoCu Metal Oxides for Oxygen Evolution Reaction显示文摘Molybdenum doping is an effective way to improve the oxygen evolution reaction(OER)properties of catalysts,which can efficiently improve the electronic conductivity,mass transport process,and intrinsic activity of transition metal oxides or hydroxides,especially for those multi-component oxides with more abundant active sites.Herein,we have prepared a quaternary FeCoMoCu metal oxide on Cu foam(FeCoMoCuO_(x)@Cu)as an efficient OER catalyst.As expected,FeCoMoCuO_(x)@Cu could exhibit a low overpotential(252 mV at the current density of 10 mA/cm^(2))and exceptional stability(10000 cycles of CV scans or constant electrolysis for 48 h). | HAO Zhimin LIU Dapeng GE Huaiyun ZUO Xintao FENG Xilan SHAO Mingzhe YU Haohan YUAN Guobao ZHANG Yu | 2022 | Chemical Research in Chinese Universities2022，38，3： | 0 |
| 5 | Directing in-situ self-optimization of single-atom catalysts for improved oxygen evolution显示文摘The demand for clean and sustainable energy has encouraged the production of hydrogen from water electrolyzers.To overcome the obstacle to improving the efficiency of water electrolyzers,it is highly desired to fabricate active electrocatalysts for the sluggish oxygen evolution process.However,there is generally an intrinsic gap between the as-prepared and real electrocatalysts due to structure evolution under the oxidative reaction conditions.Here,we combine in-situ anionic leaching and atomic deposition to realize single-atom catalysts with self-optimized structures.The introduced F ions facilitate structural transformation from Co(OH)xF into CoOOH(F),which generates an amorphous edge surface to provide more anchoring sites for Ir single atoms.Meanwhile,the in-situ anionic leaching of F ions elevates the Co valence state of Ir_(1)/CoOOH(F)more significantly than the counterpart without F ions(Ir_(1)/CoOOH),leading to stronger adsorption of oxygenated intermediates.As revealed by electrochemical measurements,the increased Ir loading together with the favored adsorption of*OH intermediates improve the catalytic activity of Ir_(1)/CoOOH(F).Specifically,Ir_(1)/CoOOH(F)delivered a current density of 10 mA cm-2at an overpotential of 238 mV,being lower than 314 mV for Ir_(1)/CoOOH.The results demonstrated the facility of the in-situ optimization process to optimize catalyst structure for improved performance. | Peiyu Ma Chen Feng Huihuang Chen Jiawei Xue Xinlong Ma Heng Cao Dongdi Wang Ming Zuo Ruyang Wang Xilan Ding Shiming Zhou Zhirong Zhang Jie Zeng Jun Bao | 2023 | Journal of Energy Chemistry2023，，5： | 0 |
| 6 | Ru Nanoparticles Supported on Co-Embedded N-Doped Carbon Nanotubes as Efficient Electrocatalysts for Hydrogen Evolution in Basic Media显示文摘A challenging but urgent task is to construct efficient and robust hydrogen evolution reaction(HER)electrocatalysts for practically feasible and sustainable hydrogen production through alkaline water electrolysis.Herein we report a simple and mild pyrolysis method to synthesize the efficient Ru nanoparticles(NPs) supported on Co-embedded N-doped carbon nanotubes(Ru/Co-NCNTs)catalyst for HER in basic media.The Ru/Co-NCNTs display remarkable performance with a low overpotential of only 35mV at 10mA/cm^2,a small Tafel slope(36mV/dec),and a high mass activity in 1mol/L KOH,which is superior to commercial 20% Pt/C catalyst.This excellent performance is benefited from the enhanced conductivity of N-doped carbon nanotubes(NCNTs)and high intrinsic activity triggered by synergistic coupling between Ru NPs and Co-embedded N-doped carbon nanotubes(Co-NCNTs). | YAN Baolin LIU Dapeng FENG Xilan SHAO Mingzhe ZHANG Yu | 2020 | Chemical Research in Chinese Universities2020，36，3： | 0 |
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