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学者姓名：李钒
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Abstract ：
Polymers of intrinsic microporosity (PIMs) have been widely used in functional membranes in recent years because of the inefficient packing of molecules to form stable structural micropores. The gel polymer electrolyte (GPE) was fabricated with bacterial cellulose (BC) as support membrane and the partially amidated PIM-1 (named as PIM-CONH2) as functional layer, which was used as electrolyte membrane in lithium-metal batteries (LMBs). Due to the existence of amide groups, the formed PIM-CONH2/BC GPE exhibited a high Li+ transference number (0.76), good cycling performance (83% capacity retention after 200 cycles at 0.5C), and good rate recovery in a LiFePO4|GPE|Li battery. The layered porous structure in the PIM-CONH2/BC GPE could adjust the Li+ transport behavior, and the presence of an amide group promoted the uniform dissolution/ deposition of Li+. And the amidated PIMs in the GPE could play a significant role in improving the interfacial affinity and suppressing the growth of lithium dendrites. This work provides a new strategy for improving the safety and stability of LMBs in order to meet the demands for functionalized LMB electrolytes.
Keyword ：
Gel polymer electrolyte (GPE) Gel polymer electrolyte (GPE) Electrochemical performance Electrochemical performance Polymers of intrinsic microporosity (PIMs) Polymers of intrinsic microporosity (PIMs) Multilayered structure Multilayered structure
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| GB/T 7714 | Zou, Haoran , Wang, Yue , Li, Xiyuan et al. Multilayered amidated polymer of intrinsic microporosity for gel polymer electrolyte in lithium metal batteries [J]. | JOURNAL OF MEMBRANE SCIENCE , 2023 , 685 . |
| MLA | Zou, Haoran et al. "Multilayered amidated polymer of intrinsic microporosity for gel polymer electrolyte in lithium metal batteries" . | JOURNAL OF MEMBRANE SCIENCE 685 (2023) . |
| APA | Zou, Haoran , Wang, Yue , Li, Xiyuan , Ding, Peipei , Guo, Hongxia , Li, Fan . Multilayered amidated polymer of intrinsic microporosity for gel polymer electrolyte in lithium metal batteries . | JOURNAL OF MEMBRANE SCIENCE , 2023 , 685 . |
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Abstract ：
Fe-N-C has a high number of FeNx active sites and has thus been regarded as a high-performance oxygen reduction reaction (ORR) catalyst, and combining Fe3C with Fe-N-C typically boosts ORR activity. However, the catalytic mechanism remains unknown, limiting further research and development. In this study, a precipitation-solvothermal process was used in conjunction with pyrolysis to produce a series of Fe-N-C catalysts derived from a zeolitic imidazolate framework (ZIF) that was composited with Fe3C. The prepared catalysts had a multiscale structure of ZIF-like carbon particles and rod-like structures, as well as bamboo-like carbon nanotubes (CNTs) and carbon layers wrapped with Fe3C particles while a series of studies revealed the origin of the rod-like structures and Fe3C phase. The hierarchical structure was beneficial to the enhanced electrocatalytic performance of catalysts for ORR. The optimal sample had the highest half-wave potential of 0.878 V vs. RHE, which was higher than that of commercial Pt/C (0.861 V vs. RHE). The ECSA of the optimal sample was 1.08 cm(2) mu g(-1), with an electron transfer number close to 4, and functioning kinetics. The optimal sample exhibited high durability and methanol tolerance for the ORR. Finally, blocking different Fe active sites with coordination ions demonstrated that Fe(ii) was the main active site, indicating that Fe3C primarily served as a cocatalyst to optimize the electron structure of Fe-N-C, thereby synergistically improving the ORR activity.
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| GB/T 7714 | Wang, Tanlun , Xu, Lincheng , Sun, Chenxiang et al. Synthesis of hierarchically structured Fe3C/CNTs composites in a FeNC matrix for use as efficient ORR electrocatalysts [J]. | RSC ADVANCES , 2023 , 13 (6) : 3835-3842 . |
| MLA | Wang, Tanlun et al. "Synthesis of hierarchically structured Fe3C/CNTs composites in a FeNC matrix for use as efficient ORR electrocatalysts" . | RSC ADVANCES 13 . 6 (2023) : 3835-3842 . |
| APA | Wang, Tanlun , Xu, Lincheng , Sun, Chenxiang , Li, Xiyuan , Yan, Yong , Li, Fan . Synthesis of hierarchically structured Fe3C/CNTs composites in a FeNC matrix for use as efficient ORR electrocatalysts . | RSC ADVANCES , 2023 , 13 (6) , 3835-3842 . |
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Abstract ：
The aim of developing platinum-based hydrogen evolution reaction (HER) catalysts is to prepare catalysts with low noble metal loading, stability, and ideal electrocatalytic efficiency. Here, we report the development of a (Ni, Fe) double hydroxide (NiFe-LDH) catalytic electrode using polyvinylpyrrolidone (PVP) as a capping agent and carbon black (CB) and nickel carbonyl powder as components by a simple hydrothermal method. We loaded Pt nanoparticles on the surface after heat treatment of the catalytic electrode. The treated electrode showed a favorable valence state distribution and good morphology for the HER; the metal-carrier interaction was increased through Pt loading, and the reaction path of the HER was optimized. The prepared catalytic electrode had enhanced kinetic performance with an overpotential of only 63 mV at 50 mA cm(-2) and good stability. This provides an effective strategy for developing highly active platinum-based catalytic electrodes.
Keyword ：
low platinum low platinum NiFe-LDH NiFe-LDH hydrogen evolution reaction hydrogen evolution reaction valence regulation valence regulation heat treatment heat treatment
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| GB/T 7714 | Sun, Chenxiang , Wang, Yan , Xu, Lincheng et al. Layered Double (Ni, Fe) Hydroxide Loaded with Platinum Nanoparticles as an Efficient Catalyst for the Hydrogen Evolution Reaction [J]. | ACS APPLIED ENERGY MATERIALS , 2022 , 5 (4) : 5002-5009 . |
| MLA | Sun, Chenxiang et al. "Layered Double (Ni, Fe) Hydroxide Loaded with Platinum Nanoparticles as an Efficient Catalyst for the Hydrogen Evolution Reaction" . | ACS APPLIED ENERGY MATERIALS 5 . 4 (2022) : 5002-5009 . |
| APA | Sun, Chenxiang , Wang, Yan , Xu, Lincheng , Wang, Yue , Wang, Tanlun , Sun, Chunwen et al. Layered Double (Ni, Fe) Hydroxide Loaded with Platinum Nanoparticles as an Efficient Catalyst for the Hydrogen Evolution Reaction . | ACS APPLIED ENERGY MATERIALS , 2022 , 5 (4) , 5002-5009 . |
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Abstract ：
Transition metal oxide nanomaterials or nanocomposites containing transition metal oxides have the potential to replace traditional catalysts for electrochemical applications, photocatalysis, and energy storage. Amorphous manganese oxide catalysts were prepared via photochemical metal-organic deposition (PMOD). Through XRD, SEM-EDS, Raman spectroscopy, FTIR spectroscopy, HRTEM-EDS, and XPS, we confirmed that amorphous manganese oxide catalysts were successfully prepared. Amorphous catalysts prepared with different photolysis times were compared in terms of their performance for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), and catalyst MnOx-PMOD48 showed the best performance because of its high Mn3+ proportion and electrochemically active surface area. MnOx-PMOD48 showed better ORR/OER performance than the crystalline MnOx and MnOx/Ti4O7 catalysts from our previous work. Following our previous work on crystalline manganese oxide catalysts, we added Ti4O7 during the PMOD process with 48 h of treatment and obtained the amorphous catalyst MnOx/Ti4O7-PMOD. MnOx/Ti4O7-PMOD was supported by Ti4O7 particles, which led to improved stability. The ORR/OER catalytic activity of MnOx/Ti4O7-PMOD was better than that of crystalline catalyst MnOx/Ti4O7-300, which was the best crystalline catalyst in our previous work. We also compared lithium-oxygen batteries assembled with MnOx/Ti4O7-PMOD and MnOx/Ti4O7-300. The battery performance tests confirmed that the amorphous manganese catalyst had better ORR/OER bifunctional catalytic performance than the crystalline manganese catalyst because of its high defect state with more abundant edge active sites and more surface-exposed catalytic active sites.
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| GB/T 7714 | Bai, Fan , He, Yuxiu , Xu, Lincheng et al. Improved ORR/OER bifunctional catalytic performance of amorphous manganese oxides prepared by photochemical metal-organic deposition [J]. | RSC ADVANCES , 2022 , 12 (4) : 2408-2415 . |
| MLA | Bai, Fan et al. "Improved ORR/OER bifunctional catalytic performance of amorphous manganese oxides prepared by photochemical metal-organic deposition" . | RSC ADVANCES 12 . 4 (2022) : 2408-2415 . |
| APA | Bai, Fan , He, Yuxiu , Xu, Lincheng , Wang, Yue , Wang, Yan , Hao, Zhanzhong et al. Improved ORR/OER bifunctional catalytic performance of amorphous manganese oxides prepared by photochemical metal-organic deposition . | RSC ADVANCES , 2022 , 12 (4) , 2408-2415 . |
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Abstract ：
Metal-N-C-based catalysts prepared by pyrolysis are frequently used in the oxygen reduction reaction (ORR). Zeolitic imidazolate frameworks (ZIFs), a type of metal organic framework (MOF), are selected as precursors due to their special structure and proper pore sizes. A series of Fe-N-C catalysts with different concentrations of 2-methylimidazole were prepared with a simple solvothermal-pyrolysis method, and the transformation productivity, morphology and ORR activity were investigated. It was found that the Fe-N-C catalyst with a 2-methylimidazole concentration of 0.53 mol L-1 had the best performance. In 0.1 M KOH solution, the half-wave potential was 0.852 V (vs. RHE), with the highest electrochemically active surface area (ECSA) of 94.1 cm(2), and the ORR reaction was dominated by a 4-electron process. The current only decreased by 10.5% after 50 000 s of chronoamperometry (CA), while the half-wave potential only decreased 20 mV in 3 M methanol. Additionally, this catalyst cannot be poisoned by Cl- and SO32- ions in the ORR process. Finally, some typical ions including SCN-, Fe(CN)(6)(3-) and Fe(CN)(6)(4-) were used to inhibit the active sites, and it was determined that Fe(ii) is the real active species. The series of synthesis and testing experiments has significance in guiding optimization of the synthesis conditions and analysis of the mechanism of active sites in Fe-N-C materials.
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| GB/T 7714 | Wang, Tanlun , Sun, Chenxiang , Yan, Yong et al. Understanding the active sites of Fe-N-C materials and their properties in the ORR catalysis system [J]. | RSC ADVANCES , 2022 , 12 (16) : 9543-9549 . |
| MLA | Wang, Tanlun et al. "Understanding the active sites of Fe-N-C materials and their properties in the ORR catalysis system" . | RSC ADVANCES 12 . 16 (2022) : 9543-9549 . |
| APA | Wang, Tanlun , Sun, Chenxiang , Yan, Yong , Li, Fan . Understanding the active sites of Fe-N-C materials and their properties in the ORR catalysis system . | RSC ADVANCES , 2022 , 12 (16) , 9543-9549 . |
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Abstract ：
Developing novel oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) catalysts is vital for water splitting. Here, carbon black (CB) and nickel carbonyl powder (NCP) are used as components, and the nonionic surfactant polyvinyl pyrrolidone (PVP) is used as a shape-controlled capping agent to easily prepare layered double (Ni, Fe) hydroxide (NiFe-LDH) electrodes. Scanning electron microscopy observation and X-ray photoelectron spectra analysis show that the Fe2+ -doped layered double hydroxide is grown in situ on nickel foam (NF). CB (XC-72) and NCP further improve the electrical conductivity. At 10 mA.cm(-2), the overpotentials of the OER and HER are 203 mV and 83 mV, respectively, in 1 M KOH. Only 1.48 V is needed when both electrodes are applied for water splitting, and it has a stability of more than 100 h. This work can be used as a medium to elevate the OER and HER performance of NiFe-LDH-based catalysts. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Keyword ：
Self-repairing Self-repairing Hydrogen evolution reaction Hydrogen evolution reaction NiFe-LDH NiFe-LDH Water splitting Water splitting Oxygen evolution reaction Oxygen evolution reaction
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| GB/T 7714 | Sun, Chenxiang , Wang, Tanlun , Sun, Chunwen et al. Layered double (Ni, Fe) hydroxide grown on nickel foam and modified by nickel carbonyl powder and carbon black as an efficient electrode for water splitting [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2022 , 47 (45) : 19609-19618 . |
| MLA | Sun, Chenxiang et al. "Layered double (Ni, Fe) hydroxide grown on nickel foam and modified by nickel carbonyl powder and carbon black as an efficient electrode for water splitting" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 47 . 45 (2022) : 19609-19618 . |
| APA | Sun, Chenxiang , Wang, Tanlun , Sun, Chunwen , Li, Fan . Layered double (Ni, Fe) hydroxide grown on nickel foam and modified by nickel carbonyl powder and carbon black as an efficient electrode for water splitting . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2022 , 47 (45) , 19609-19618 . |
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Abstract ：
The relationship between the interactions of valence, electronic structure and orbitals generated by rare-earth doped perovskites and the electrocatalytic mechanism is important research work. Herein, the experimental and theoretical studies prepared through La1-xSmxMnO3 show that the doping of Sm triggers the B-site active center, which will promote the ORR and OER kinetics at the catalyst interface, and ultimately give La0.7Sm0.3MnO3 (LSM0.3) which has the most positive half-wave potential of 0.70 V versus RHE and the smallest overpotential of 0.48 V. Meanwhile, the specific electron configuration of Sm reduces the grain boundary energy and suppresses Oswald maturation, which causes the smallest reduction for ORR current density during long-term operation. Finally, zinc-air cell assembled with LSM0.3 as a cathode catalyst can be cycled stably for 330 h at 1 mA cm(-2). This work provides new insight into the improved electrocatalytic performance of oxygen by rare-earth doped perovskites.
Keyword ：
density functional theory density functional theory catalytic performance catalytic performance rare earth elements rare earth elements perovskite perovskite
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| GB/T 7714 | Hao, Zhanzhong , Xu, Lincheng , Yan, Yong et al. Understanding the Effect of the Valence State of Perovskite B-Site Ions on Its Oxygen Electrocatalytic Performance [J]. | ADVANCED MATERIALS INTERFACES , 2022 , 9 (16) . |
| MLA | Hao, Zhanzhong et al. "Understanding the Effect of the Valence State of Perovskite B-Site Ions on Its Oxygen Electrocatalytic Performance" . | ADVANCED MATERIALS INTERFACES 9 . 16 (2022) . |
| APA | Hao, Zhanzhong , Xu, Lincheng , Yan, Yong , Li, Fan . Understanding the Effect of the Valence State of Perovskite B-Site Ions on Its Oxygen Electrocatalytic Performance . | ADVANCED MATERIALS INTERFACES , 2022 , 9 (16) . |
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Abstract ：
Manganese oxide composites with mixed valence states were prepared through the hydrothermal method by compositing with Ti4O7 and calcining at different temperatures, and their ORR and OER catalytic performance were investigated. The prepared catalysts were characterized by XRD, SEM-EDS, HRTEM-EDS, and XPS methods to analyse their phase constitution, morphology feature, and surface composition. The major phase of manganese oxides was Mn3O4, which is a one-dimensional structure, and its growth was induced by Ti4O7. The ORR and OER catalytic activity can be enhanced due to the preferred orientation of manganese oxides. Electrochemical measurements, namely CV, LSV and EIS, were utilized for determining the ORR and OER catalytic activity, whereas CA and ADT were used for studying the durability and stability. A Li-O2 battery was assembled to test the electrochemical behavior and properties in practical application. MnOx/Ti4O7 calcined at 300 °C exhibited the best catalytic activity of 0.72 V vs. RHE half-wave potential for ORR and 0.67 V vs. RHE overpotential for OER. The proportion of Mn3+ was also highest in all the MnOx/Ti4O7 composites. The assembled Li-O2 battery shows high performance with a voltage gap of only 0.85 V. Therefore, it can be affirmed that the inducement of Ti4O7 could strengthen the preferred orientation in manganese oxide growth and Mn3+ in MnOx/Ti4O7 plays a vital role in catalyzing ORR and OER, with both improving the ORR and OER bifunctional catalytic performance of manganese oxides. © The Royal Society of Chemistry.
Keyword ：
Oxide minerals Oxide minerals Manganese oxide Manganese oxide Oxygen Oxygen Oxygen evolution reaction Oxygen evolution reaction Catalyst activity Catalyst activity Lithium-air batteries Lithium-air batteries Morphology Morphology Lithium compounds Lithium compounds Electrolytic reduction Electrolytic reduction Calcination Calcination Oxygen reduction reaction Oxygen reduction reaction
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| GB/T 7714 | Bai, Fan , Xu, Lincheng , Wang, Daode et al. Effect of the valence state of Mn in MnO: X/Ti4O7composites on the catalytic performance for oxygen reduction reaction and oxygen evolution reaction [J]. | RSC Advances , 2021 , 11 (3) : 1524-1530 . |
| MLA | Bai, Fan et al. "Effect of the valence state of Mn in MnO: X/Ti4O7composites on the catalytic performance for oxygen reduction reaction and oxygen evolution reaction" . | RSC Advances 11 . 3 (2021) : 1524-1530 . |
| APA | Bai, Fan , Xu, Lincheng , Wang, Daode , An, Li , Hao, Zhanzhong , Li, Fan . Effect of the valence state of Mn in MnO: X/Ti4O7composites on the catalytic performance for oxygen reduction reaction and oxygen evolution reaction . | RSC Advances , 2021 , 11 (3) , 1524-1530 . |
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Abstract ：
Given the current complex heterogeneous network environment, choosing different networks in different user scenarios limits the effectiveness of network access. To solve this problem, an algorithm based on DDQN is proposed to optimize the network configuration. The reward value is determined by service type, throughput, delay, and signal strength. DDQN can avoid the ping-pong effect that can be generated by network selection and stabilize the network environment by splitting action selection and action evaluation to prevent overestimation. The experimental results show that the algorithm can autonomously select and assign network protocols and can more accurately find network access methods suitable for user scenarios than the current network switching method represented by a single network parameter based on RSSI and CCA. © Published under licence by IOP Publishing Ltd.
Keyword ：
Internet protocols Internet protocols Heterogeneous networks Heterogeneous networks Wireless networks Wireless networks
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| GB/T 7714 | Wang, Chongyang , Yan, Hairong , Li, Fan . Self-selection Protocol Algorithm for Wireless Networks based on DDQN [C] . 2021 . |
| MLA | Wang, Chongyang et al. "Self-selection Protocol Algorithm for Wireless Networks based on DDQN" . (2021) . |
| APA | Wang, Chongyang , Yan, Hairong , Li, Fan . Self-selection Protocol Algorithm for Wireless Networks based on DDQN . (2021) . |
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Abstract ：
提高农业转移人口的进城落户意愿是推动户籍人口城镇化发展的重要途径.然而,当下各地农业转移人口进城落户积极性不高,提升户籍人口城镇化率并不乐观.基于推拉理论,利用中国流动人口动态监测调查数据(CMDS),采用二元Logit模型与中介效应模型,分析土地资源禀赋对农业转移人口进城落户意愿的影响,探讨两者间的作用机制.结果表明,农业转移人口进城落户意愿总体较低,占比为48.91％,农业转移人口拥有承包地与宅基地的比例分别为61.40％和71.71％.土地资源禀赋显著抑制了农业转移人口的进城落户意愿,农业转移人口的身份认同、社会交往状况在土地资源禀赋影响进城落户意愿的过程中发挥着中介效应,社会保障状况发挥着显著的负向调节效应.进一步研究发现,土地流转将会提高农业转移人口的进城落户意愿.因此,一方面要加快农村土地制度改革与农民土地权益保障机制设计,消除阻碍农业转移人口进城落户的体制障碍;另一方面也要通过土地为农业转移人口留条退路,增强社会结构的弹性,维护社会稳定.
Keyword ：
土地资源禀赋 土地资源禀赋 农业转移人口 农业转移人口 中介效应 中介效应 调节效应 调节效应 落户意愿 落户意愿
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| GB/T 7714 | 李帆 , 冯虹 . 土地资源禀赋对农业转移人口进城落户意愿的影响研究 [J]. | 农业现代化研究 , 2021 , 42 (3) : 441-450 . |
| MLA | 李帆 et al. "土地资源禀赋对农业转移人口进城落户意愿的影响研究" . | 农业现代化研究 42 . 3 (2021) : 441-450 . |
| APA | 李帆 , 冯虹 . 土地资源禀赋对农业转移人口进城落户意愿的影响研究 . | 农业现代化研究 , 2021 , 42 (3) , 441-450 . |
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