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Carbon-Confined Indium Oxides for Efficient Carbon Dioxide Reduction in a Solid-state Electrolyte flow Cell

Angewandte Chemie 2022年第21期134卷

作者： Zhitong Wang Yansong Zhou Dongyu Liu Ruijuan Qi Chenfeng Xia Prof. Mingtao Li Prof. Bo You Prof. Bao Yu Xia School of Chemistry and Chemical Engineering Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service Failure Hubei Engineering Research Center for Biomaterials and Medical Protective Materials Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology (HUST) 1037 Luoyu Rd Wuhan 430074 China International Research Center for Renewable Energy (IRCRE) State Key Laboratory of Multiphase Flow in Power Engineering (MFPE) Xi'an Jiaotong University (XJTU) 28 Xianning West Road Xi'an 710049 China HSE University 101000 Moscow Russia Key Laboratory of Polar Materials and Devices (MOE) Department of Electronics School of Physics and Electronic Science East China Normal University Shanghai 200241 China

Developing robust electrocatalysts and advanced devices is important for electrochemical carbon dioxide (CO 2 ) reduction toward the generation of valuable chemicals. We present herein a carbon-confined indium oxide electrocatalyst for stable and efficient CO 2 reduction. The reductive corrosion of oxidative indium to the metallic state during electrolysis could be prevented by carbon protection, and the applied carbon layer also optimizes the reaction intermediate adsorption, which enables both high selectivity and activity for CO 2 reduction. In a liquid-phase flow cell, the formate selectivity exceeds 90 % in a wide potential window from −0.8 V to −1.3 V vs. RHE. The continuous production of ca. 0.12 M pure formic acid solution is further demonstrated at a current density of 30 mA cm −2 in a solid-state electrolyte mediated reactor. This work provides significant concepts in the parallel development of electrocatalysts and devices for carbon-neutral technologies.

关键词： Carbon Dioxide Reduction Corrosion-Resistant Electrocatalyst Indium Oxide Solid-state Electrolyte

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A simple green approach to synthesis of sub-100 nm carbon spheres as template for TiO_2 hollow nanospheres with enhanced photocatalytic activities

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Science China Materials 2018年第6期61卷 869-877页

作者： Yubo Tan1 Maochang Liu1 Daixing Wei1 Heming Tang2 Xinjian Feng2 Shaohua Shen1 International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University College of Chemistry Chemical Engineering and Materials Science Soochow University

Carbon spheres（CSs） have attracted great attention given their wide applications in bio-diagnostics, photonic band-gap crystals and drug delivery, etc. The morphology and size of CSs greatly affect their performances and applications. Herein, we report a green and catalyst-free hydrothermal carbonization（HTC） method to synthesize CSs with glucose as carbon precursor. The diameter of CSs can be tuned within a wide range from 450 to 40 nm by controlling the glucose concentration, reaction time and *** the obtained CSs as template, hollow TiO2 nanospheres（HTNSs） with controllable diameters are prepared via a sol-gel method. As photocatalysts for hydrogen generation, the photoactivity of the HTNSs shows strong dependence upon size,and is much higher than that of solid TiO2. With particle size decreasing, the photoactivity of the obtained HTNSs gradually increases. Without any co-catalyst, the highest photocatalytic hydrogen generation activity is obtained with HTNSs of 40 nm in diameter, which exceeds that of solid TiO2 and commercial P25 by 64 times and 3 times, respectively.

关键词： carbon nanospheres hydrothermal carbonization hollow titanium dioxide nanospheres photocatalytic hydrogen production

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Preparation and Properties of Rice Hull Ash as the catalysis supporter in the fluidized-bed reactor

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IOP Conference Series: Earth and Environmental Science 2021年第1期766卷

作者： Zhaohui Teng Shan Huang Heng Xu Na Li Qulan Zhou College of energy Chengdu University of Tecnoogy Chengdu 610059 China National Key Laboratory of Nuclear Reactor System Design Technology Nuclear Power Institute of China Chengdu 610200 China shenzhen ILNG energy technology CO. LTD Shenzhen 518061 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

This research focuses on the preparation and properties of rice hull ash(RHA). We prepared RHA from combustion of rice husk in the fluidized-bed reactor. The temperature field of the furnace was steady and bellow 850°C to keep SiO2 amorphous. XRD, BET and SEM were applied in the characterization tests to investigate the effect of flow rate(u), the higher primary-secondary wind ratio(i) and relative height of bed material. The optimal combustion condition for preparing RHA was discussed. RHA obtained from rice hull contains abundant amorphous SiO2 (>90%) and the characterization results of RHA show its potential to be a good catalyst supporter.

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Corrigendum to: “One-pot synthesis of amorphous/crystalline SnO 2 /BaSO 4 composite sensitized with Eosin Y for enhanced photocatalytic H 2 production” [J. Environ. Chem. Eng. 12 (2024) 112770/JECE112770]

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Journal of Environmental Chemical engineering 2024年第5期12卷

作者： Cheng Cheng Jinfeng Zhang Haiping Jia Xutao Ding Gongyue Dong Feng Chen Yuchao Hu Jinwen Shi School of Chemical Engineering and Technology International Research Center for Renewable Energy (IRCRE) State Key Laboratory of Multiphase Flow in Power Engineering (MFPE) Xi’an Jiaotong University (XJTU) 28 West Xianning Road Xi’an 710049 China Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs Xi’an Shiyou University Xi’an 710065 China Shaanxi Gas Group Fuping Energy Technology Co. Ltd 2 Kaiyuan Road Xi'an 710016 China Integrated Energy Institute Sichuan Digital Economy Industry Development Research Institute 88 Jiefang Road Chengdu 610036 China West Pipeline Company PipeChina 666 Beijing Middle Road Urumqi 830013 China School of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 China

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Numerical Study on flow Field in a Diameter-Varying Spray Tower for Amine-Based CO2 Absorption

SSRN

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SSRN 2019年

作者： Wu, Xiaomei Yu, Yunsong Zhang, Zaoxiao Wang, Geoff Rudolph, Victor School of Chemical Engineering and Technology Xi’an Jiaotong University No.28 Xianning West Road Xi’an710049 China State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an710049 China

关键词： Greenhouse gases

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Performance of CO_2 absorption in a diameter-varying spray tower

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Chinese Journal of Chemical engineering 2017年第8期25卷 1109-1114页

作者： Xiaomei Wu Yunsong Yu Zhen Qin Zaoxiao Zhang School of Chemical Engineering and Technology Xi'an Jiaotong University State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

The application of spray towers for CO2 capture is a development trend in recent years. However, most of the previous jobs were conducted in a cylindrical tower by using a single spray nozzle, whose configuration and performance is not good enough for industrial application. To solve this problem, the present work proposed a diameter-varying spray tower and a new spray mode of dual-nozzle opposed impinging spray to enhance the heat and mass transfer of CO2 absorption process. Experiments were performed to investigate the mass transfer performance （in terms of the CO2 removal rate （η） and the overall mass transfer coefficient （KGae）） of the improved spray tower under various operating conditions. Experimental results showed that the liquid to gas ratio and mole ratio of MEA to C02 are major factors, which affect the absorption performance and the maximums of η and KGae that are 94.0% and 0.574 kmol. m^-3·h^-1·kPa^-1, respectively, under the experimental conditions. Furthermore, new correlations to predict the mass transfer coefficient of the proposed spray tower are developed in various CO2 concentrations with a Pearson Correlation Coefficient over 90%.

关键词： Carbon dioxide Absorption Diameter-varying spray tower Mass transfer

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Current Density Regulating Lithium Metal Directional Deposition for Long Cycle Life Lithium Metal Batteries

SSRN

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SSRN 2020年

作者： Mao, Heng Yu, Wei Cai, Zhuanyun Liu, Guixian Liu, Limin Wen, Rui Su, Yaqiong Xi, Kai Li, Benqiang Da, Xinyu Kou, Huari Yan, Wei Ding, Shujiang Xi'an Key Laboratory of Sustainable Energy Materials Chemistry School of Chemistry Xi’an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power Xi’an Jiaotong University Xi’an710049 China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing100190 China Cambridge Graphene Centre Department of Engineering University of Cambridge CambridgeCB3 0FA United Kingdom Department of Mechanical Engineering University of Michigan-Dearborn DearbornMI48128 United States Department of Environmental Science and Engineering State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an710049 China

Uncontrolled dendrite formation in the high energy density of lithium metal batteries (LMBs) may pose serious safety risks. Numerous works have been reported to protect separator. However, these methods still couldn’t inhibit the dendrite upward growth to protect the separator, effectively. Here, we introduce a novel “orientated-growth” strategy that makes the depositional interface transfer to the anode/current collector interface from the anode/separator interface. We placed a layer of cellulose/graphene carbon composite aerogel (CCA) between the current collector and the anode (CCA-Li). This layer works as the charge organizer;it induces a higher current density distribution and makes Li prefer to deposit in the bottom CCA layer of CCA-Li electrode. Both in-situ and ex-situ images of the electrode demonstrate the anode part of the cell has been flipped;with the new deposited particles facing the current collector and smooth surface facing the separator. Electrochemical characterization of the electrode in half and full cells showed outstanding cyclic stability and rate capability, with the CCA-Li/LPF full cell able to maintain 94% of its initial capacity after 1000 cycles. We believe that the innovative strategy would promote the leapfrog development for LMBs. © 2020, The Authors. All rights reserved.

关键词： Electric current collectors

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Rapid Prediction Models for Oil Temperature and Surrounding Environment Temperature Fields in Buried Hot Crude Oil Pipelines

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Journal of Pipeline Systems engineering and Practice 2025年第3期16卷

作者： Yan, Feng Xu, Jingyan Li, Qifu Zhou, Chaoqun Ji, Mingyang Gong, Junhua Xiang, Yue Chen, Yujie Han, Dongxu Wang, Peng Dept. of Storage and Transportation Technology Research PipeChina Research Institute of Science and Technology 4 Dongting 1st Rd. Binhai New Area Tianjin300450 China Project Management Center of Production and Operation Dept Northeast Company of PipeChina Hunnan District Liaoning Province Shenyang110000 China Dept. of Production and Operation Changqing Oil and Gas Transportation Branch of Northwest Company of PipeChina Xingqing District Yinchuan Ningxia750004 China School of Mechanical Engineering Beijing Institute of Petrochemical Technology Beijing102617 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'An Jiaotong Univ Xi'an710049 China Dept. of Digital Twin for Energy and Power Systems Sichuan Energy Internet Research Institute Tsinghua Univ Sichuan610213 China

Wax-rich or high-viscosity crude oil requires heating for long-distance transportation in buried pipelines. Monitoring the temperature distributions and variations of both oil and surrounding environment is crucial to ensuring safety and economic efficiency. This study proposes two models for rapidly predicting the steady-state oil temperature and surrounding environment temperature fields based on the Fourier neural operator (FNO) network and U-shaped network (UNet), respectively. These models leverage numerical results as training data, incorporating boundary conditions and environment grid coordinates at the pipeline cross section as inputs to predict the temperature distributions of both oil and the surrounding environment along the buried pipeline. With optimized hyperparameters, the models achieve accurate and efficient predictions. The FNO and UNet models had average RMS errors (RMSEs) in environment temperature field prediction of 2.68×10-3 and 5.49×10-3 at the pipeline cross section, respectively. For oil temperature predictions, the FNO model had an average relative error of 1.49×10-4, compared with 2.55×10-4 for the UNet model, with average absolute error values of 5.32×10-3 and 7.24×10-3, respectively. Moreover, both models exhibited strong generalization, with an average RMSE in the environment temperature field prediction of less than 3.5×10-2 and an average relative error in oil temperature predictions of less than 2.1×10-3 across different data sets. Comparatively, the FNO and UNet model had slightly higher prediction accuracy than the UNet model. In terms of computational efficiency for a 100-km pipeline, these models offer improvements of at least 116.25× over the numerical simulation method, with a maximum improvement of 1,775.03× as the number of simultaneously predicted pipeline cross sections increases. © 2025 American Society of Civil Engineers.

关键词： flowlines

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Dynamic modeling of a NG-fueled SOFC-PEMFC hybrid system coupled with TSA process for fuel cell vehicle

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Energy Procedia 2019年 158卷 2215-2224页

作者： Zhen Wu Meng Ni Pengfei Zhu Zaoxiao Zhang Building Energy Research Group Department of Building and Real Estate The Hong Kong Polytechnic University Hong Kong P.R. China State Key Laboratory of Multiphase Flow in Power Engineering School of Chemical Engineering and Technology Xi’an Jiaotong University Xi’an 710049 P.R. China

Fuel cell power technology has drawn extensive attentions due to its high efficiency, low emission and noise. Solid oxide fuel cell (SOFC) could generate the power by diverse fuels, such as natural gas (NG), while proton exchange membrane fuel cell (PEMFC) only feeds on pure H 2 . More and more attentions are paid on the combination of SOFC and PEMFC for high efficiency and convenient refueling in the practical applications. To obtain H 2 fuel with high purity from SOFC as a reformer, the gas processing subsystem for H 2 separation and purification should be applied between SOFC and PEMFC. In this present study, the gas processing subsystem, consisting of water gas shift (WGS) and thermal swing adsorption (TSA), is introduced into the SOFC-PEMFC hybrid system. Then, the SOFC-WGS-TSA-PEMFC hybrid system is modelled to investigate the transient behaviors under different operations. The simulation results show that the SOFC-WGS-TSA-PEMFC hybrid system has an improved energy conversion efficiency of approximately 64%, which is higher than the only-SOFC and the reform-PEMFC. The waste heat recovery for driving the TSA reaction accounts for the higher net electricity efficiency compared with the SOFC-PEMFC hybrid system based on the pressure swing adsorption (PSA) for H 2 separation. Since the SOFC and PEMFC have completely different transient responses to the change of the loading, the influences of operating conditions of fuel cell vehicles on the transient behaviors of single SOFC and PEMFC and the overall performance of the SOFC-WGS-TSA-PEMFC hybrid system are further investigated. Through the analysis and discussion based on the dynamic modelling, the operation strategy is unveiled in this paper for the performance optimization of the hybrid system when installed in the fuel cell vehicles.

关键词： SOFC PEMFC Metal hydride Transient behavior High efficiency

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Influence of(Mg_(1/3)Nb_(2/3))complex substitutions on crystal structures and microwave dielectric properties of Li2TiO3 ceramics with extreme low loss

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Journal of Materiomics 2018年第4期4卷 368-382页

作者： Huan-Huan Guo Di Zhou Li-Xia Pang Jin-Zhan Su Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic and Information EngineeringXi'an Jiaotong UniversityXi'an710049China Micro-optoelectronic Systems Laboratories Xi'an Technological UniversityXi'an710032ShaanxiChina International Research Centre for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi'an Jiaotong UniversityXi'anShaanxi710049China

A systematic investigation of the Li2Ti1-x(Mg_(1/3)Nb_(2/3))xO_(3)(0.1≤x≤0.35)solid solutions synthesized by traditional solid-state reaction method is reported in this *** the composition range of 0.1≤x≤0.25,a monoclinic rock salt structured solid solution was *** x increased to 0.3,a phase transition from monoclinic to cubic phase,along with an order-disorder phase transition,was *** x increased from 0.1 to 0.35,the microwave permittivity(εr)and temperature coefficient of resonant frequency(TCF)of the Li2Ti1-x(Mg_(1/3)Nb_(2/3))xO_(3)ceramics decreased linearly from 21.0 to 18.6,+27.1 to-19.4 ppm/℃,*** Li_(2)Ti_(0.75)(Mg_(1/3)Nb_(2/3))0.25O_(3)ceramic sintered at 1170℃shows high performance of microwave dielectric properties with aεr~19.6,a Qf(Q=quality factor=1/dielectric loss;f=resonant frequency)~109,770 GHz(at 7.7 GHz)and a near zero TCF~t 1.2 ppm/℃.Moreover,the burying sintering process can reduce the volatilization of lithium so that the porosity of Li_(2)Ti_(0.75)(Mg_(1/3)Nb_(2/3))0.25O_(3)ceramic was reduced effectively,which made Li_(2)Ti_(0.75)(Mg_(1/3)Nb_(2/3))0.25O_(3)ceramic promising for future *** area electron diffraction patterns,high-resolution transmission electron microscopy,Raman and far-infrared spectra were employed to study the relation between crystal structure and microwave dielectric properties in detail.

关键词： Microwave dielectric properties Phase evolution Crystal structure High quality

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