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Nano Research 2017年第9期10卷 3228-3237页

作者： Nana Du Chengming Wang ran long Yujie Xiong Hefei National Laboratory for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science and National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230026 China School of Chemistry and Materials Engineering Fuyang Normal College Fuyang 236041 China

The development of catalysts with high activity and durability for the cathodic oxygen reduction reaction (ORR) in both alkaline and acidic media is important for improving the performance of the proton exchange membrane (PEM) fuel cells. This can be achieved by dispersing Pt-based alloy nanoparticles inside N-doped porous carbon frameworks. However, it still requires the development of a facile method towards synthesizing this unique hybrid structure. In this work, we demonstrate that N-doped carbon-stabilized PtCo nanoparticles (PtCo@NC) can be facilely synthesized via thermal decomposition of Pt-incorporated Co-based zeolitic imidazolate framework (Pt@ZIF-67). The thickness of the carbon framework can be optimized to enable excellent durability, in sharp contrast to a commercial Pt/C catalyst. The mass activities achieved by optimizing the thickness of the carbon framework are 0.80 and 0.82 A·mgPt –1 at 0.9 V vs. RHE in alkaline and acidic electrolytes, respectively, which are nearly 8 times greater than those of the Pt/C. This work provides an alternative approach to low-cost and high-performance catalysts for both alkaline and acidic fuel cells.

关键词： oxygen reduction reaction PtCo nanoparticles ZIF-67 N-doped carbon metal organic frameworks

Optimal Distributed Charging Coordinations of Plug-in Electric Vehicles with Market Uniform Clearing Price Mechanism

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Optimal Distributed Charging Coordinations of Plug-in Electr...

Design of CuInS2 hollow nanostructures toward CO2 electroreduction

第25届中国控制与决策会议

作者： Ma Zhongjing ran long School of Automation Beijing Institute of Technology

ISBN: (纸本)9781467355339

In this paper, we propose a novel auction-based distributed control method with respect to market uniform clearing price（MCP） mechanism to implement the charging problems of plug-in electric vehicles（PEVs） over a finite interval. In the auction-based market uniform clearing price mechanism, each PEV submits a bid profile to the sys- tem, and a market uniform clearing price is defined by all the bid profiles, then each PEV optimizes its bid profile to achieve maximizing its private benefit, meanwhile the system-wide generation costs is minimum. In this mechanism, the electricity market plays an important role via market uniform clearing price to regulate the resource allocation, and the PEVs participate in the auction energetically by submitting their private bid profiles for their maximum private benefits. The simulation results indicate that this mechanism can achieve the distributed control strategy to converge to the global optimal control strategy.

关键词： Plug-in electric vehicles Auction Market uniform clearing price Distributed charging control Valley-fill charging

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Science China Chemistry 2020年第12期63卷 1721-1726页

作者： Chaohua He Sijia Chen ran long Li Song Yujie Xiong Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)School of Chemistry and Materials ScienceNational Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China

The sharp rise of CO2 in the atmosphere has become a potential threat to global climate, which results from the massive utilization of fossil fuel since the industry revolution. CO2 electroreduction provides us a new possibility of utilizing CO2 as a carbon feedstock for fuel and commercial chemicals generation. In this article, a new method is developed for synthesizing CuInS2 hollow nanostructures through the Kirkendall effect. The CuInS2 hollow nanostructures exhibit excellent catalytic activity for electrochemical reduction of CO2 with particular high selectivity, achieving high faradaic efficiency for HCOOH of 72.8% at -0.7 V. To elucidate the mechanisms, operando electrochemical Raman spectroscopy is employed to examine the CO2 reduction process. This work provides new insights into the design of hollow nanostructures toward electrocatalytic CO2 conversion and offers us an effective and reliable way for real-time investigation of electrochemical CO2 reduction reaction processes.

关键词： CO2 reduction electrocatalyst CuInS2 hollow nanostructure Raman spectroscopy

Influence of adjacent shield tunneling construction on existing tunnel settlement: field monitoring and intelligent prediction

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2023年第12期24卷 1106-1119页

作者： long ran Yang DING Qizhi CHEN Baoping ZOU Xiaowei YE School of Civil Engineering and Architecture Zhejiang University of Science&TechnologyHangzhou 310023China Zhejiang Engineering Research Center of Intelligent Urban Infrastructure Hangzhou City UniversityHangzhou 310015China Department of Civil Engineering Zhejiang UniversityHangzhou 310058China

Urban subway tunnel construction inevitably disturbs the surrounding rock and causes the deformation of existing subway structures. Dynamic predictions of the tunnel horizontal displacement, tunnel ballast settlement, and tunnel differential settlement are important for ensuring the safety of buildings and tunnels. First, based on the Hangzhou Metro project, we analyzed the influence of construction on the deformation of existing subway structures and the difficulties and key points in monitoring. Then, a deformation prediction model, based on a back propagation(BP) neural network, was established with massive monitoring data. In particular, we analyzed the influence of four structures of the BP neural network on prediction performance, i.e., single input–single hidden layer–single output, multiple inputs–single hidden layer–single output, single input–double hidden layers–single output, and multiple inputs–double hidden layers–single output, and verified them using measured data.

关键词： Subway Horizontal displacement of tunnel Settlement of tunnel ballast Differential settlement of tunnel Deformation prediction Back propagation(BP)neural network

Sustainable all-weather CO2 utilization by mimicking natural photosynthesis in a single material

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National Science Review 2024年第2期11卷 177-187页

作者： Xianjin Shi Yu Huang ran long Zhenyu Wang Liqin Wang Junji Cao Gangqiang Zhu Yujie Xiong State Key Laboratory of Loess and Quaternary Geology(SKLLQG) Key Laboratory of Aerosol Chemistry and Physics Institute of Earth EnvironmentChinese Academy of Sciences Center of Excellence in Quaternary Science and Global Change Chinese Academy of Sciences University of Chinese Academy of Sciences Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials Science and National Synchrotron Radiation Laboratory University of Science and Technology of China Institute of Atmospheric Physics Chinese Academy of Sciences School of Physics and Information Technology Shaanxi Normal University

Solar-driven CO2conversion into hydrocarbon fuels is a sustainable approach to synchronously alleviating the energy crisis and achieving net ***,the dependence of the conversion process on solar illumination hinders its practical application due to the intermittent availability of sunlight at night and on cloudy or rainy ***,we report a model material of Pt-loaded hexagonal tungsten trioxide（Pt/h-WO3） for decoupling light and dark reaction processes,demonstrating the sustainable CO2conversion under dark conditions for the first *** such a material system,hydrogen atoms can be produced by photocatalytic water splitting under solar illumination,stored together with electrons in the h-WO3through the transition of W6+to W5+and spontaneously released to trigger catalytic CO2reduction under dark ***,we demonstrate using natural light that CH4production can persist at night and on rainy days,proving the accomplishment of all-weather CO2conversion via a sustainable way.

关键词： sustainable CO2 utilization artificial photosynthesis all-weather application charge storage

Engineering active Ni-doped Co_(2)P catalyst for efficient electrooxidation coupled with hydrogen evolution

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Nano Research 2023年第5期16卷 6728-6735页

作者： Jiayi Li Xin Mao Wanbing Gong Xinyu Wang Yawen Jiang ran long Aijun Du Yujie Xiong National Synchrotron Radiation Laboratory Hefei National Research Center for Physical Sciences at the MicroscaleSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China School of Chemistry Physics and Mechanical EngineeringScience and Engineering FacultyQueensland University of TechnologyGardens Point CampusBrisbaneQLD 4001Australia

The thermodynamically favorable electrocatalytic oxidation coupled with hydrogen evolution reaction(HER)is considered as a sustainable and promising ***,it remains a great challenge due to the lack of simple,cheap,highefficient ***,we successfully develop a simple and scalable electro-deposition and subsequent phosphorization route to fabricate Ni-doped Co_(2)P(Ni-Co_(2)P)nanosheets catalyst using the in-situ released Ni species from defective Ni foam as metal ***,the as-synthesized Ni-Co_(2)P catalyst exhibits excellent electrochemical 5-hydroxymethylfurfural oxidation reaction(HOR)performance with>99%2,5-furandicarboxylic acid yield and>97%Faradaic efficiency at an ultralow potential of 1.29 V *** hydrogen electrode(RHE).Experimental characterization and theoretical calculation reveal that the atomically doped Ni species can enhance the adsorption of reactant and thus lower the reaction energy *** coupling the electrocatalytic HOR with HER,the employed two-electrode system using Ni-Co_(2)P and commercial Ni foam as anode and cathode,respectively,exhibits a low cell voltage of 1.53 V to drive a current density of 10 mA·cm^(−2),which is 90 mV lower than that of pure water *** work provides a facile and efficient approach for the preparation of high-performance earth-abundant electrocatalysts toward the concurrent production of H_(2)and value-added chemicals.

关键词： heteroatomic doping phosphide electrodes electrocatalytic oxidation hydrogen evolution reaction biomass conversion

Charging and discharging Control of Plug-in Electric Vehicles with uncertainties via Robust Model Predictive Control Method 36

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Charging and discharging Control of Plug-in Electric Vehicle...

Hydriding Pd cocatalysts： An approach to giant enhancement on photocatalytic CO2 reduction into CH4

第36届中国控制会议

作者： Peng Wang long ran Yunfeng Shao Suli Zou Zhongjing Ma School of Automation Beijing Institute of Technology State Grid Chongqing ELectric Power Co.Electric Power Research Institute State Grid Lvliang Power Supply Company

ISBN: (纸本)9781538629185

With the development of the Plug-in Electric Vehicles（PEVs）, it has become a significant part of electric load. The optimal PEVs’ charging and discharging scheduling is a vital problem when PEVs connect into the smart grid. In most literatures,the charging and discharging procedure is assumed idealized. In reality, many uncertainties are exist during the procedure, such as the conversion efficiency, temperature and other aspects, but they are not easy to be expressed as a fixed term. In this paper,we use a random but bounded uncertainties to describe the uncertainties. Meanwhile, based on robust model predictive control（RMPC） method, we introduce the disturbance invariant set to solve the PEVs scheduling problem with uncertainties and design a feedback control law to guarantee the feasibility of it. A distributed method to reduce the computation complexity of the uncertain problem. At last, some simulations demonstrate the feasibility of the proposed centralized and distributed methods.

关键词： PEV RMPC uncertainty disturbance invariant set

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Nano Research 2017年第10期10卷 3396-3406页

作者： Yuzhen Zhu Chao Gao Song Bai Shuangming Chen ran long Li Song Zhengquan Li Yujie Xiong Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life Sciences Institute of Physical and Chemistry Zhejiang Normal University Jinhua 321004 China Hefei National Laboratory for Physical Sciences at the Microscale iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science Hefei Science Center (CAS) and National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230026 China

Photocatalytic reduction of CO2 into high value-added CH4 is a promising solution for energy and environmental crises. Integrating semiconductors with cocatalysts can improve the activities for photocatalytic CO2 reduction; however, most metal cocatalysts mainly produce CO and H2. Herein, we report a cocatalyst hydridation approach for significantly enhancing the photocatalytic reduction of CO2 into CH4. Hydriding Pd cocatalysts into PdH0.43 played a dual role in performance enhancement. As revealed by our isotopic labeling experiments, the PdH0.43 hydride cocatalysts reduced H2 evolution, which suppressed the H2 production and facilitated the conversion of the CO intermediate into the final product： CH4. Meanwhile, hydridation promoted the electron trapping on the cocatalysts, improving the charge separation. This approach increased the photocatalytic selectivity in CH4 production from 3.2% to 63.6% on Pd{100} and from 15.6% to 73.4% on Pd{111}. The results provide insights into photocatalytic mechanism studies and introduce new opportunities for designing materials towards photocatalytic CO2 conversion.

关键词： photocatalysis cocatalyst palladium hydride carbon dioxide methane

The Effect of Oxygen to Salen-Co Complexes for the Copolymerization of PO/C02

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Chinese Journal of Polymer Science 2020年第10期38卷 1124-1130,I0007页

作者： ran-long Duan Yan-Chuan Zhou Zhi-Qiang Sun Yue-Zhou Huang Xuan Pang Xue-Si Chen Key Llaboratory ofPolymer Eomaterials ChangchunIntitute of Apied ChemistyChinese Academy ofSciencesChangchun 130022 China University of Science and Technology of China Hefei 230026 China

A series of Salen-Co(Ⅱ)complexes were synthesized to study the effect of O2 on the catalytic performance of Salen-Co complexes for the copolymerization of PO/CO2 The Salen-Co(Ⅱ) complexes showed low activity on the cyclo addition of CO2 to PO with the aid of a cocatalyst such as PPNCI Unexpectedly,with the addition of O2 the activity of Salen-C(Ⅱ)complexes was obviously increased and 100%cylic carbonate was *** the pressure of O2 increased,the activity of the complex also *** the existence of 02 the activity of the complexes was influenced by their structures and the pressure of 02,and the camplexes with the conjugated structure showed higher *** structures of cocatalyst also played a crucial role as for the change of the activity By altering the electrophilit of Salen-Co(Ⅲ),O2 can also be used as cocatalyst for the copolymerization of PO/CO2。

关键词： Salen-cobalt Epoxides Carbon dioxide Copolymerization

Enhancing the catalytic efficiency of the Heck coupling reaction by forming 5 nm Pd octahedrons using kinetic control

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Nano Research 2015年第6期8卷 2115-2123页

作者： ran long Di Wu Yaping Li Yu Bai Chengming Wang Li Song Yujie Xiong Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Center of Chemistry for Energy Materials School of Chemistry and Materials Science and National Synchrotron Radiation Laboratory University of Science and Technology ot China Hefei Anhui 230026 China

Heterogeneous catalysis occurs through a process of interfacial reactions; therefore, both surface facet and size control can increase catalytic efficiency. Octahedral Pd nanocrystals, enclosed by {111} facets, should be the ideal geometrical shape for Heck coupling reactions; however, it is challenging to synthesize 5 nm Pd octahedrons with a relatively uniform size distribution using existing capping-agent techniques. Here, we used palladium as a model system to investigate how the kinetics of atomic addition could be precisely controlled using a syringe pump. As a result, our method produced Pd octahedrons as small as 5 nm, which increased the catalytic efficiency of Heck coupling reactions while reducing the weight of catalyst used.

关键词： palladium facet control size control heck-type coupling reaction catalysis