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Efficient C-N coupling in electrocatalytic urea generation on copper carbonate hydroxide electrocatalysts

Journal of Energy Chemistry 2024年第6期93卷 289-298,I0008页

作者： Yinuo Wang Yian Wang Qinglan Zhao hongming xu Shangqian Zhu Fei Yang Ernest P.Delmo Xiaoyi Qiu Chi Song Juhee Jang Tiehuai Li Ping Gao MDanny Gu Minhua Shao Advanced Materials Thrust The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511400GuangdongChina Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina Department of Materials Science and Engineering Southern University of Science and Technology of Chin11088 Xueyuan BoulevardShenzhen 518055GuangdongChina Energy Institute and Chinese National Engineering Research Center for Control&Treatment of Heavy Metal PollutionThe Hong Kong University of Science and TechnologyKowloonHong KongChina Department of Chemistry City University of Hong KongTat Chee AvenueKowloonHong KongChina

Urea generation through electrochemical CO_(2) and NO_(3)~-co-reduction reaction(CO_(2)NO_(3)RR)is still limited by either the low selectivity or yield rate of urea.Herein,we report copper carbonate hydroxide(Cu_2(OH)_2CO_(3))as an efficient CO_(2)NO_(3)RR electrocatalyst with an impressive urea Faradaic efficiency of45.2%±2.1%and a high yield rate of 1564.5±145.2μg h~(-1)mg_(cat)~(-1).More importantly,H_(2) evolution is fully inhibited on this electrocatalyst over a wide potential range between-0.3 and-0.8 V versus reversible hydrogen electrode.Our thermodynamic simulation reveals that the first C-N coupling follows a unique pathway on Cu_2(OH)_2CO_(3) by combining the two intermediates,~*COOH and~*NHO.This work demonstrates that high selectivity and yield rate of urea can be simultaneously achieved on simple Cu-based electrocatalysts in CO_(2)NO_(3)RR,and provide guidance for rational design of more advanced catalysts.

关键词： Copper carbonate hydroxide Co-reduction Urea generation C-N coupling DFT calculation

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Driver-Centric Velocity Prediction With Multidimensional Fuzzy Granulation

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IEEE/CAA Journal of Automatica Sinica 2023年第2期10卷 547-549页

作者： Ji Li Quan Zhou xu He hongming xu IEEE the Department of Mechanical Engineering University of BirminghamBirmingham B152TTUK

Dear Editor,This letter deals with a real-world problem regarding chaotic time series prediction, where a driver-centric velocity prediction model is presented for vehicle intelligent control and advanced driver assistance,i.e., multi-dimension fuzzy predictor. Inspired by fuzzy granulation technology, a finite-state Markov chain(MC) is reinforced to capture probabilities of the transitions between velocity and acceleration and present signals that vary in a continuous range.

关键词： letter acceleration chaotic

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欧洲汽车动力系统多元化的发展趋势和展望

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汽车安全与节能学报 2024年第2期15卷 137-153页

作者：徐宏明英国伯明翰大学工程院伯明翰B152TT英国

当前,全球能源结构处在变革时期,低碳和零碳化是包括汽车行业在内的所有经济运行和规划活动中的重中之重。汽车动力系统的能源呈现多元化的发展趋势,始于轻型车的电动化已成为不可逆转的总体方向,而氢时代在到来之前面临各种技术和非技... 详细信息

当前,全球能源结构处在变革时期,低碳和零碳化是包括汽车行业在内的所有经济运行和规划活动中的重中之重。汽车动力系统的能源呈现多元化的发展趋势,始于轻型车的电动化已成为不可逆转的总体方向,而氢时代在到来之前面临各种技术和非技术类等诸多问题的挑战。电动化带来的一个更为广泛应用的新技术是人工智能(AI),从而使得汽车动力系统逐步突破传统设计方法的局限得以适应更加复杂的环境条件并获得高效率。该文介绍欧洲汽车动力系统电动化和多元化的发展趋势,针对欧盟正在考虑中的电力合成燃料等问题并结合动力系统智能化等发展趋势,对欧洲汽车技术领域在2035年前的研发动向作出相关思考以及展望。

关键词：碳中和动力多元化电动汽车(EV) 清洁能源电子燃料(e-fuels) 人工智能(AI)

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Experimental Investigation of the Rail Pressure Fluctuations Correlated with Fuel Properties and Injection Settings

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Automotive Innovation 2021年第2期4卷 215-226页

作者： Carlo Coratella Lewis Parry Yanfei Li hongming xu School of Mechanical Engineering University of BirminghamEdgbastonBirmingham B152TTUK State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijingChina

Injection-induced rail pressure fluctuations are proven to cause nonuniform spray development.These fluctuations are also responsible for generating lower injection pressures,to the detriment of jet penetration length and break-up timing.Despite the vast literature dealing with such issues,several aspects of rail pressure fluctuations remain unclear.Additionally,the need for compliance with the emission legislation has shed light on the potential of alternative fuels,which represent a pathway for sustainable mobility.This scenario has motivated the present study dealing with the assessment of the time history of rail pressure correlated with fuel properties.Tests have been performed using a last-generation common rail injection equipment under various injection settings,employing diesel and 2-methylfuran-diesel blend.This paper describes the research activity and aims to provide new insights into the correlation of rail pressure fluctuations with fuel properties.

关键词： Rail pressure fluctuations Wave propagation Viscosity Bulk modulus 2-Methylfuran Fuel blend

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Spray,atomization and combustion characteristics of oxygenated fuels in a constant volume bomb:A review

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Journal of Traffic and Transportation Engineering(English Edition) 2020年第3期7卷 282-297页

作者： Peng Zhang Xin Su Chengshan Yi Hao Chen hongming xu Limin Geng School of Automobile Chang'an UniversityXi'an 710064China School of Civil and Transportation Engineering Qinghai Nationalities UniversityXining 810007China Department of Mechanical Engineering University of BirminghamEdgbaston B152TTUK

Biofuels have extensive available resources and have an immense potential as promising alternative fuels for automobile.The application advantages of biofuels are mainly reflected as particulate matter(PM)reduction,carbon neutral,greenhouse gases reduction,waste utilization,energy and economic security,and fuel pluralism.Based on the understanding of molecular structure effects of biofuels on soot formation and particles morphology,the effects of alcohols,ethers,esters and biodiesel on spray and combustion process in constant volume bomb in recent years are retrospectively analyzed in this paper.For the mixture,macromolecular ester fuels and polyoxymethylene dimethyl ether(PODE)are conducive to the improvement of liquid spray,while biodiesel,small molecules,dimethyl ether(DME)and alcohols are reversed.Alcohols are advantageous to the extension of mixing time and the increasing of vapor-phase mixture.Through the influence integrated assessment,alcohols show the best performance on the spray,atomization and combustion,while biodiesels show the worst.But in terms of combustion,PODE is the best choice without considering spray and atomization.For binary alternative-diesel fuel blends,methanol or butanol is the best additive based on synthetically considerations on spray,atomization and combustion.To meet the requirements of the fuel application of diesel engine,ternary fuel or even quaternary fuel have been proposed and explored.This review can help to form a systematic understanding on fuel recombining and obtain the guide of clean and efficient fuel formulation for diesel engine.

关键词： Oxygenated biofuel Spray Atomization Combustion Constant volume bomb

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Feedstocks,environmental effects and development suggestions for biodiesel in China

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Journal of Traffic and Transportation Engineering(English Edition) 2020年第6期7卷 791-807页

作者： Hao Chen Meijuan Ding Yuan Li hongming xu Yangyang Li Zhao Wei School of Automobile Chang’an UniversityXi'an 710064China School of Civil and Transportation Engineering Qinghai Nationalities UniversityXining 810007China Department of Mechanical Engineering University of BirminghamEdgbaston B152TTUK

In the usage phase,diesel engines fuelled with diesel-biodiesel blends produced lower soot,HC and CO emissions.However,the environmental effects should include the greenhouse gas(GHG)emissions.GHG variations of biodiesel production from three generation feedstocks were analyzed based on the land use change(LUC).Adequate land use change could keep the biodiversity and did not cause the increase of GHG emissions.The choice for feedstocks of biodiesel in China was comprehensively analyzed based on the land use type,the precipitation and the oil contents and the cultivation conditions of plants.Then,the suggestions for biodiesel development in China were given.Results showed that China should thoroughly abandon the first generation feedstocks due to the lack of arable land.Jatropha curcas(J.curcas),Pistacia chinensis Bunge(P.chinensis),Comus wilsoniana(C.wilsoniana)and Xanthoceras sorbifolium Bunge(X.sorbifolium)were considered as the most promising feedstocks for biodiesel production.It is suggested to plant X.sorbifolium in sand lands in the north and northwest of China with less natural rainfall and the others in south and southwest of China.The concern for microalgae should be transmitted to engineering microalgae cultivated in wastewater.The microalgae biodiesel refinery should be developed together with wastewater proposal industry and coal fired power plants.Lastly,only natural gas-based or biomass-based methanol can be used for biodiesel production.

关键词： Biodiesel Feedstock Greenhouse gas emission Land use change

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一种用于农产品供应链风险预测评估的贝叶斯决策树算法模型

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西南大学学报（自然科学版） 2024年第3期46卷 189-200页

作者：徐爽蔡鸿明赵林畅徐永驰贵阳学院经管学院贵阳550005 上海交通大学软件学院上海201100 贵阳学院数信学院贵阳550005 贵阳学院电通学院贵阳550005

农产品供应链稳定对保障市场供应、稳定需求、扩大居民消费需求具有重要意义.新兴技术的应用可以提高农产品供应链的价值,降低传统供应链的风险.因此,本文在机器学习算法的基础上,将贝叶斯算法融入决策树模型,建立了一种用于农产品供应... 详细信息

农产品供应链稳定对保障市场供应、稳定需求、扩大居民消费需求具有重要意义.新兴技术的应用可以提高农产品供应链的价值,降低传统供应链的风险.因此,本文在机器学习算法的基础上,将贝叶斯算法融入决策树模型,建立了一种用于农产品供应链风险评估预测的模型.首先,基于贝叶斯算法设计了用于风险划分的决策树模型.然后,使用随机变量的权重构建决策树模型用于风险预测评估.最后,将决策树模型应用于农产品供应链(APSC),提出了APSC管理框架,帮助决策者进行评估分析,以降低农产品供应链风险.实验结果表明,对比模型预测风险的性能达到90%左右,而本文提出的模型可以达到95%左右,证明其具有较高的预测准确性.敏感性分析证实,该模型对市场变化具有较高的灵敏度,可以帮助决策者更好地评估农产品供应链风险并及时调整供应链机制.

关键词：决策树农产品供应链风险评估预测机器学习

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Recent Progress in Automotive Gasoline Direct Injection Engine Technology

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Automotive Innovation 2018年第2期1卷 95-113页

作者： Shijin Shuai Xiao Ma Yanfei Li Yunliang Qi hongming xu State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijing 100084China

Gasoline direct injection(GDI)engines are currently the dominant powertrains for passenger cars.With the implementation of increasingly stringent fuel consumption and emission regulationsworldwide,GDI engines are facing challenges owing to high particulate matter emissions and a tendency to knock,leading to a change in the research and design(R&D)issues compared with those in the twentieth century.This paper reviews the progress in research regarding GDI engine technologies over the past 20 years,focusing on combustion system configurations,and also highlights common issues in GDI R&D,including pre-ignition and deto-knock,soot formation and PM emissions,injector deposits and gasoline compression ignition(GCI).First,an overview of recent developments in the field as driven by regulations is provided,following which progress in injection and combustion systems is examined.Third,the review addresses the occurrence and mechanism of deto-knock and considers means of suppressing this phenomenon.The fourth section discusses soot formation mechanisms and particulate matter emission characteristics of GDI engines and describes the application of gasoline particulate filter(GPF)after-treatment.The subsequent section summarizes studies regarding injector deposit formation,as well as pioneering research into GCI combustion modes.Finally,a summary and future prospects for GDI engine technologies are provided.

关键词： Gasoline directioninjection Combustionsystem Pre-ignition Particulatematter Injector deposit Gasoline compression ignition

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人工智能和数据驱动的计算模拟

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中国科学：物理学、力学、天文学 2024年第4期54卷 45-50页

作者：李贺徐勇段文晖肖睿娟翁红明清华大学物理系北京100084 中国科学院物理研究所北京100190

“大数据+人工智能”代表着一种崭新的研究范式,对未来科学研究将产生深远影响.在计算物理领域,人工智能和数据驱动正促成新方法论的形成,也由此衍生出新的重要科学问题.本文将探讨人工智能和数据驱动的计算模拟这一新兴研究领域,综述... 详细信息

“大数据+人工智能”代表着一种崭新的研究范式,对未来科学研究将产生深远影响.在计算物理领域,人工智能和数据驱动正促成新方法论的形成,也由此衍生出新的重要科学问题.本文将探讨人工智能和数据驱动的计算模拟这一新兴研究领域,综述相关研究进展,并对未来的发展进行展望.

关键词：计算物理人工智能数据驱动

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氨基功能化壳聚糖微球对Cr(VI)的吸附性能及其机理

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高分子材料科学与工程 2024年第1期40卷 45-56页

作者：蒋达许倩倩吴雪兰龙红明张秋雨安徽工业大学生物膜法水质净化及利用技术教育部工程研究中心安徽马鞍山243032 冶金减排与资源综合利用教育部重点实验室安徽马鞍山243002

以壳聚糖(CS)为基材,在制备过程中用三聚磷酸钠(TPP)为固化剂,用戊二醛(GLA)交联以提高其耐酸性能,并使用二乙烯三胺(DETA)改性,制备出富含羟基和氨基的CS/DETA凝胶球用以吸附水体中的Cr(VI)。红外光谱表征结果证实了DETA的成功接枝;X... 详细信息

以壳聚糖(CS)为基材,在制备过程中用三聚磷酸钠(TPP)为固化剂,用戊二醛(GLA)交联以提高其耐酸性能,并使用二乙烯三胺(DETA)改性,制备出富含羟基和氨基的CS/DETA凝胶球用以吸附水体中的Cr(VI)。红外光谱表征结果证实了DETA的成功接枝;X射线光电子能谱表征结果显示Cr(VI)被吸附到CS/DETA表面;Zeta电位表征揭示了CS/DETA的表面电负性,其在酸性条件下更易吸附Cr(VI)。通过动力学和热力学模型探究其吸附过程,结果表明,CS/DETA对Cr(VI)的吸附过程更符合拟一级动力学模型和Langmuir等温吸附模型,在318.15 K,pH=2时,对Cr(VI)的最大吸附量为370.92 mg/g,且该反应为自发的吸热反应。

关键词：生物质吸附剂凝胶改性壳聚糖

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