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f-p-d coupling-induced bonding covalency boosts C–C coupling in electrocatalytic CO2 reduction over Er–O–Cu sites

Journal of Energy Chemistry 2025年 108卷 239-245页

作者： Wang, Maoyin Huang, Yuhang Song, Lu Wei, Ruilin Hao, Shuya Liu, Zhengzheng Hu, Cejun Li, Bin Lv, Ximeng Yuan, Pei Zheng, Gengfeng Laboratory of Advanced Materials State Key Laboratory of Porous Materials for Separation and Conversion Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai Shanghai200438 China School of Materials Science and Engineering Fuzhou University Fujian Fuzhou350108 China College of Materials Science and Engineering Qingdao University of Science and Technology Shandong Qingdao266042 China

The copper-based electrocatalysts feature attractive potentials of converting CO2 into multi-carbon (C2+) products, while the instability of Cu–O often induces the reduction of Cu+/Cu0 catalytic sites at the cathode and refrains the capability of stable electrolysis especially at high powers. In this work, we developed an Erbium (Er) oxide-modified Cu (Er–O–Cu) catalyst with enhanced covalency of Cu–O and more stable active sites. The f-p-d coupling strengthens the covalency of Cu–O, and the stability of Cu+ sites under electroreduction condition is critical for promoting the C–C coupling and improving the C2+ product selectivity. As a result, the Er–O–Cu sites exhibited a high Faradaic efficiency of C2+ products (FEC2+) of 86 % at 2200 mA cm−2, and a peak partial current density of |jC2+| of 1900 mA cm−2, comparable to the best reported values for the CO2-to-C2+ electroreduction. The CO2 electrolysis by the Er–O–Cu sites was further scaled up to 100 cm2 to achieve high-power (∼200 W) electrolysis with ethylene production rate of 16 mL min−1. © 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences

关键词： Electrolytic reduction

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Current trends in bio-based elastomer materials

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SusMat 2022年第1期2卷 2-33页

作者： Shuai Tang Jiao Li Runguo Wang Jichuan Zhang Yonglai Lu Guo-Hua Hu Zhao Wang Liqun Zhang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijingP.R.China Center of Advanced Elastomer Materials Beijing University of Chemical TechnologyBeijingP.R.China Beijing Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijingP.R.China Laboratory of Reactions and Process Engineering(LRGP UMR CNRS 7274)ENSICCNRS-University of LorraineNancyFrance

Elastomers play an irreplaceable role in our society due to their unique *** rubber is directly obtained from plants and is widely used in tires,shoes,***,modified natural rubbers are proposed to expand the application of natural ***,these natural rubbers have a limited variety of molecular structures and may not be able to meet ever-demanding *** synthetic elastomers have a variety of molecular structures and their properties are used in various fields,but mainly originate from fossil *** review deals with bio-based elastomers,and more specifically natural rubber and bio-based synthetic *** on reprocessability,bio-based elastomers can also be divided into bio-based chemically cross-linked ones and thermoplastic *** to traditional fossil-based elastomers,bio-based ones may alleviate environmental pollution and promote the sustainable development of the elastomer industry.

关键词： bio-based elastomers chemically cross-linked natural rubber synthetic rubber

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New Automatic Reclosing Scheme on Substation Lines for Renewable Energy Source Access

New Automatic Reclosing Scheme on Substation Lines for Renew...

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Power and Energy engineering (ICPEE), International Conference on

作者： Qiu Yutao Qian Zhengxu Pan Wulue Wang Song Xu Feng Zhang Zanzan Wen Minghao State Grid Zhejiang Power Dispatching Control Center Hangzhou China State Grid Zhejiang Electric Power Co. Ltd. Research Institute Hangzhou China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

In order to avoid the adverse effects of the access of renewable energy sources on automatic reclosing, reclosing is usually done by cutting out renewable energy power supply after the fault occurs and extending the reclosing setting time. But this will lead to the interruption of power supply to a large number of local loads, which is not conducive to the efficient use of renewable energy sources. In this paper, a new reclosing method for substation lines with inverter-type renewable energy source access is proposed. This method can keep the inverter-type renewable energy source running continuously during reclosing, and ensure the continuity of power supply of important loads. Firstly, it is pointed out that the control strategy of renewable energy source must be switched during reclosing, to make it have the basic island operation capability. Then, to maintain the power balance between renewable energy source and load, the method of using load shedding cooperating with unloading resistors during reclosing is proposed. Finally, the reclosing operation will be performed when the synchronization conditions are met. And simulation under different working conditions is carried out on PSCAD/EMTDC platform, which verified the feasibility of the proposed reclosing strategy.

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Fast Deposition of Ni Doped Ysz Coatings by Cathode Plasma Electrolysis for Solid Oxide Fuel Cell Applications

SSRN

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SSRN 2024年

作者： Liu, Chenxu Du, Ke Song, Chen Zhou, Chenchen Zhang, Jin Liu, Min Tian, Yu Meng, Yonggang State Key Laboratory of Tribology in Advanced Equipment Tsinghua University Beijing100084 China Institute of New Materials Guangdong Academy of Science National Engineering Laboratory for Modern Materials Surface Engineering Technology The Key Lab of Guangdong for Modern Surface Engineering Technology Guangzhou510650 China School of Materials Science and Engineering Nanyang Technological University Singapore639798 Singapore Beijing Key Laboratory for Corrosion Erosion and Surface Technology Institute of Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China

The fast fabrication of high-quality anode layers of solid oxide fuel cells (SOFCs) is a key factor for their efficient applications. In this work, a one-step method of cathode plasma electrolytic deposition (CPED) was developed to prepare Ni doped YSZ coatings with a thickness of 35-55 μm on porous stainless steel. Compared to the several hours required by traditional methods, a faster coating deposition that only took 60 s was achieved owing to the effect of enormous energy of plasma arc at the solid-liquid interface in the CPED method. The preparation process was analyzed by recording the variation of current with voltage. The unique micro-structure of the coatings was observed, and the formation mechanism of the Ni doped YSZ coating during the CPED process was proposed. The deposited coatings showed an excellent performance as the anode layers for SOFCs, with Sc2O3 stabilized ZrO2 coating prepared by atmospheric plasma spraying as electrolyte and La0.6Sr0.4Co0.2Fe0.8O3-δ as the cathode. The open circuit voltage of the cells reached 1.000 V and the maximum power density reached 817.42 mW/cm2 at 800℃. The finding opens a novel pathway for the efficient preparation of anode materials for SOFCs. © 2024, The Authors. All rights reserved.

关键词： Fabrication

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Tailoring the Porous Structure of Mono-dispersed Hierarchically Nitrogen-doped Carbon Spheres for Highly Efficient Oxygen Reduction Reaction

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Energy & Environmental Materials 2021年第1期4卷 81-87页

作者： Chengyong Shu Zhuofan Gan Yuyang Hou Ting Zhu Jijun Ma Wei Tang Yuping Wu School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049China CSIRO Mineral Resources Clayton Vic 3168Australia School of Materials Science and Engineering Central South UniversityChangsha 410083China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China State Key Laboratory of Materials-Oriented Chemical Engineering School of Energy Science and Engineering and Institute of Advanced MaterialsNanjing Tech UniversityNanjing 211800China

The search for a low-cost metal-free cathode material with excellent mass transfer structure and catalytic activity in oxygen reduction reaction(ORR)is one of the most challenging issues in fuel *** this work,nitrogen-rich mphenylenediamine is introduced into the synthesis of porous carbon spheres to tune the pore structure and nitrogen-doped active *** a result,more pyridinic N and pyrrolic N functional species were observed at the interior and surface of the carbon *** introduction of m-phenylenediamine also regulated the nucleating of precursors,an urchin-like mesoporous surface structure ensures point contact and less agglomeration between each particle was *** optimized proportion of micropores/mesopores and improved nitrogen-contained functional species,the ORR activity can be remarkably *** half-wave potential of this catalyst could achieve to 0.81 V(versus RHE)which is only 42 m V lower than commercial Pt/C ***,the optimized cathode catalyst achieved a 69 m W cm-2 maximum power density when operated in direct methanol fuel cells at room temperature.

关键词： fuel cells metal-free catalysts nitrogen-doped porous carbon oxygen reduction reaction

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Defect engineering on Carbon‑Based Catalysts for Electrocatalytic CO2 Reduction

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Nano-Micro Letters 2021年第1期13卷 56-78页

作者： Dongping Xue Huicong Xia Wenfu Yan Jianan Zhang Shichun Mu College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry and College of ChemistryJilin University2699 Qianjin StreetChangchun 130012People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China

Electrocatalytic carbon dioxide(CO2)reduction(ECR)has become one of the main methods to close the broken carbon cycle and temporarily store renewable energy,but there are still some problems such as poor stability,low activity,and *** the most promising strategy to improve ECR activity is to develop electrocatalysts with low cost,high activity,and long-term ***,defective carbon-based nanomaterials have attracted extensive attention due to the unbalanced electron distribution and electronic structural distortion caused by the defects on the carbon ***,the present review mainly summarizes the latest research progress of the construction of the diverse types of defects(intrinsic carbon defects,heteroatom doping defects,metal atomic sites,and edges detects)for carbon materials in ECR,and unveil the structure-activity relationship and its catalytic *** current challenges and opportunities faced by high-performance carbon materials in ECR are discussed,as well as possible future *** can be believed that this review can provide some inspiration for the future of development of high-performance ECR catalysts.

关键词： Electrocatalytic CO2 reduction Carbon-based nanomaterials Intrinsic defects Heteroatom doping defects Metal atomic sites

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MOF-derived Co-MOF,O-doped carbon as trifunctional electrocatalysts to enable highly efficient Zn-air batteries and water-splitting

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Journal of Energy Chemistry 2021年第5期30卷 290-298页

作者： Xinde Duan Na Pan Can Sun Kexin Zhang Xukun Zhu Mingdao Zhang Li Song Hegen Zheng School of Environmental Science and Engineering Nanjing University of Information Science&TechnologyJiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlCollaborative Innovation Center of Atmospheric Environment and Equipment TechnologyNanjing 210044JiangsuChina State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023JiangsuChina

Development of high-efficiency non-noble electrocatalysts for oxygen reduction reaction(ORR),oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)is urgently needed for high-performance Zn-air batteries and overall water ***,a facile strategy to synthesize novel Co-MOF,O-doped carbon(Co-MOF-T)based on Zn,Co-doped glucosamine and ZIF-8 by pyrolysis at temperature T was *** prepared Co-MOF-800 showed a superior oxygen reduction reaction(ORR)activity comparable to that of commercial Pt/C *** addition,this catalyst shows great potential in the overall water splitting due to the excellent oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)*** on the trifunctional activity,the primary Zn-air batteries using a Co-MOF-800 air electrode achieved a high open-circuit voltage of 1.38 V,a specific capacity of 671.6 mAh g^(-1) Zn,and a prominent peak power density of 144 mW cm^(-2).Also,the rechargeable Zn-air batteries based on CoMOF-800 air electrode could be smoothly run for 510 cycles with a low voltage gap of 0.58 ***,the trifunctional Co-MOF-800 catalyst was applied to boost the electrochemical water splitting,demonstrating its promising potential as a green energy material for practical applications.

关键词： Metal-organic frameworks Carbon catalysts Trifunctional electrocatalyst Metal-air batteries Water splitting

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Inertia Provision of DFIG-Based Wind Turbines by Improving the Damping Ratio of PLL

Inertia Provision of DFIG-Based Wind Turbines by Improving t...

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Energy Technologies for Future Grids (ETFG), IEEE International Conference on

作者： Yini Zhou Wei He Donghai Zhu Xudong Zou Zhikun Wang Weilin Hou School of Electrical and Electronic Engineering State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China State Grid Shandong Electric Power Company Dongying Power Supply Company Dongying China China Electric Power Research Institute Beijing China

Due to the rapid control of power electronics, it results that the wind turbines (WTs) typified by double-fed induction generator (DFIG) based WTs do not have inertia response capability. Many inertia control methods have been proposed, but they suffer from large structural modifications, high cost, poor adaptability, and slow response. In this regard, this paper first analyzes the inertia response characteristics of DFIG-based WT and further reveals principle of achieving power response of WTs from controlling the phase-locked angle. Then, why the WTs have no inertia response capacity is analyzed when a typical phase-locked loop (PLL) is adopted. Based on this, an inertia response strategy of DFIG-Based WTs by improving the damping ratio of PLL is put forward, and frequency domain response characteristic of it is compared and analyzed with those of typical PLL. Finally, a simulation system of synchronous generator (SG) and an aggregated WT farm is built in MATLAB/Simulink for verification.

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RaCMC: Residual-Aware Compensation Network with Multi-Granularity Constraints for Fake News Detection

arXiv

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arXiv 2024年

作者： Yu, Xinquan Sheng, Ziqi Lu, Wei Luo, Xiangyang Zhou, Jiantao School of Computer Science and Engineering Ministry of Education Key Laboratory of Information Technology Guangdong Province Key Laboratory of Information Security Technology Sun Yat-sen University Guangzhou510006 China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou450002 China State Key Laboratory of Internet of Things for Smart City The Department of Computer and Information Science Faculty of Science and Technology University of Macau 999078 China

Multimodal fake news detection aims to automatically identify real or fake news, thereby mitigating the adverse effects caused by such misinformation. Although prevailing approaches have demonstrated their effectiveness, challenges persist in cross-modal feature fusion and refinement for classification. To address this, we present a residual-aware compensation network with multi-granularity constraints (RaCMC) for fake news detection, that aims to sufficiently interact and fuse cross-modal features while amplifying the differences between real and fake news. First, a multiscale residual-aware compensation module is designed to interact and fuse features at different scales, and ensure both the consistency and exclusivity of feature interaction, thus acquiring high-quality features. Second, a multi-granularity constraints module is implemented to limit the distribution of both the news overall and the image-text pairs within the news, thus amplifying the differences between real and fake news at the news and feature levels. Finally, a dominant feature fusion reasoning module is developed to comprehensively evaluate news authenticity from the perspectives of both consistency and inconsistency. Experiments on three public datasets, including Weibo17, Politifact and GossipCop, reveal the superiority of the proposed method. Copyright © 2024, The Authors. All rights reserved.

关键词： Fake detection

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Total-Ionizing-Dose Radiation Induced Gate Damage in High Voltage P-GaN Gate HEMTs 35

Total-Ionizing-Dose Radiation Induced Gate Damage in High Vo...

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35th International Symposium on Power Semiconductor Devices and ICs, ISPSD 2023

作者： Wang, Zhao Zhou, Xin Wu, Zhonghua Chen, Chen Zhou, Qi Qiao, Ming Li, Zhaoji Zhang, Bo University of Electronic Science and Technology of China State Key Laboratory of Electronic Thin Films and Integrated Devices Chengdu China Shenzhen Institute of Information Technology Shenzhen China Institute of Electronic and Information Engineering of Uestc in Guangdong Dongguan China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of China Shenzhen China

ISBN: (纸本)9798350396829

TID radiation induced damage in metal/p-GaN/AlGaN/GaN gate stack of p-GaN gate HEMTs is studied and the damage mechanisms highly correlated with electric field are revealed. For on-state bias, irradiation damages related to donor-like traps are located at the reverse-biased metal/p-GaN Schottky junction with high electric field. The depletion region in the Schottky junction would extend, and the trap-assisted tunneling mechanism could be introduced to increase the forward gate current. For off-state bias, irradiation damages are located at the reverse-biased p-GaN/AlGaN/GaN (p-i-n) junction in relation to holes trapped in the AlGaN barrier and the GaN channel. The energy barrier of the AlGaN barrier and the GaN channel would be lowered for electron injection, leading to reverse gate current and off-state drain leakage current increasing. Irradiation induced damage at the Schottky junction may be permanent, while the p-i-n junction damage is recoverable with time. © 2023 IEEE.

关键词： High electron mobility transistors

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