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学者姓名：李钒
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摘要 ：
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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摘要 ：
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.
关键词 ：
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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摘要 ：
本发明公开了一种可调控高粘度流体成膜厚度及均匀性的装置，包括成膜盘、上连接杆、万向轴承、三角支架、下连接杆、磁摆、电磁铁、偏转轮和电机。本发明利用类似于地动仪的“悬垂摆原理”，在未通电时由于重力作用使成膜盘成水平状态；通电后通过轴承、连接杆以及电磁铁和磁摆的相互吸引作用使成膜盘与水平面成一定角度做倾斜圆周运动，保证了成膜的均匀性；通过调整偏转轮旋转速度可以控制成膜厚度；依据高粘度流体粘稠度的不同，通过调节电磁铁距偏转轮正中心的距离来调节成膜盘做倾斜圆周运动时与水平面所成角度，也能更好地调节成膜厚度以及均匀性问题。因此，解决了高粘度流体成膜厚度及均匀性不好调控的问题。
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| GB/T 7714 | 李钒 , 路楠 , 侯海元 . 一种可调控高粘度流体成膜厚度及均匀性的装置 : CN202210693854.7[P]. | 2022-06-19 . |
| MLA | 李钒 et al. "一种可调控高粘度流体成膜厚度及均匀性的装置" : CN202210693854.7. | 2022-06-19 . |
| APA | 李钒 , 路楠 , 侯海元 . 一种可调控高粘度流体成膜厚度及均匀性的装置 : CN202210693854.7. | 2022-06-19 . |
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摘要 ：
本发明公开了一种可以阴阳极转换的连续再生光电一体化污水处理装置，由两个圆筒反应室组成，贯流式转轮和绞龙是通过与电机相连的旋转驱动轴驱动的。当污水在贯流式转轮和绞龙的带动下进入第一圆筒反应室后，在紫外灯照射和电极作用下，污水中的特定物质在催化剂的作用下发生光催化和电催化反应，使其得以高效降解。抄板对催化剂起到搅拌的作用，使催化剂界面能够得到及时更新，促进催化过程的进行，也使催化剂的性能更加稳定。经孔板分离后的催化剂进入第二圆筒反应室，电极反转阴阳极转换使催化剂发生电还原反应，恢复其原有的催化效果，实现催化剂的再生，可以连续投入使用。
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| GB/T 7714 | 李钒 , 许林成 , 侯海元 et al. 一种可以阴阳极转换的连续再生光电一体化污水处理装置 : CN202210693845.8[P]. | 2022-06-19 . |
| MLA | 李钒 et al. "一种可以阴阳极转换的连续再生光电一体化污水处理装置" : CN202210693845.8. | 2022-06-19 . |
| APA | 李钒 , 许林成 , 侯海元 , 何瑜庥 . 一种可以阴阳极转换的连续再生光电一体化污水处理装置 : CN202210693845.8. | 2022-06-19 . |
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摘要 ：
本发明公开了一种连续雾化进样的聚合物合成反应装置，涉及化学反应合成装置领域。该装置由具有加热搅拌及气氛保护的反应部分和连续雾化进样部分组成，反应所需的雾化溶剂通过一定压力的气体连续吹入反应装置。该装置可保证在惰性气氛条件下，高温合成的过程中添加溶剂或反应物的安全性，通过气相吹扫带动连续雾化进样的方式可以减小进样时反应体系的温度变化，并使反应物与溶剂可以充分混合，调节进气量和雾化量可以控制溶剂或反应物的进样速率，进一步控制反应的速率，本发明在制备效率、合成安全性、反应条件控制等方面具有优势。
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| GB/T 7714 | 李钒 , 邹灏然 , 侯海元 et al. 一种连续雾化进样的聚合物合成反应装置 : CN202211669284.4[P]. | 2022-12-24 . |
| MLA | 李钒 et al. "一种连续雾化进样的聚合物合成反应装置" : CN202211669284.4. | 2022-12-24 . |
| APA | 李钒 , 邹灏然 , 侯海元 , 王越 , 许林成 , 李溪源 . 一种连续雾化进样的聚合物合成反应装置 : CN202211669284.4. | 2022-12-24 . |
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摘要 ：
本发明公开了一种可交换阴阳极反应室及搅拌电极填料的污水处理装置，由贯流式转轮和反应器两部分组成，贯流式转轮通过旋转驱动轴和反应器连接在一起。反应器分内层和外层两部分：通过绝缘材料将圆筒反应室内层分隔成四个填料室，每个填料室均为导电材料制备，相互之间通过绝缘孔板隔开；外层是固定在绝缘外壳上的两个电极，以银碳刷与内层圆筒反应室导电外壁接触。电极填料填充在四个填料室内，污水经由贯流式转轮进入装置内，贯流式转轮带动圆筒反应室整体旋转；在两个电极上接通电源施加电流，转动的内层反应器交替作为阴极和阳极反应室；为保证各个反应器之间的导通，反应室内侧绝缘孔板开有小孔，保证污水能够自由流通各个反应室。
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| GB/T 7714 | 李钒 , 何瑜庥 , 侯海元 et al. 一种可交换阴阳极反应室及搅拌电极填料的污水处理装置 : CN202210693855.1[P]. | 2022-06-19 . |
| MLA | 李钒 et al. "一种可交换阴阳极反应室及搅拌电极填料的污水处理装置" : CN202210693855.1. | 2022-06-19 . |
| APA | 李钒 , 何瑜庥 , 侯海元 , 许林成 . 一种可交换阴阳极反应室及搅拌电极填料的污水处理装置 : CN202210693855.1. | 2022-06-19 . |
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摘要 ：
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.
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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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摘要 ：
一种聚合物固态聚电解质的改性方法，属于固态聚电解质隔膜技术领域。本发明采用PEO改性的纳米TiO2，然后与聚环氧烷‑聚苯醚类共聚物复合，有效地改善了无机颗粒与PEO聚合物基体的相容性，使得TiO2纳米颗粒更加均匀地分散在有机聚合物基体中，提高PEO链段的运动能力，进而有效降低了聚合物的结晶度，提高了其离子电导率。
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| GB/T 7714 | 郭红霞 , 秦周阳 , 程一辰 et al. 一种聚合物固态聚电解质的改性方法 : CN202110122226.9[P]. | 2021-01-28 . |
| MLA | 郭红霞 et al. "一种聚合物固态聚电解质的改性方法" : CN202110122226.9. | 2021-01-28 . |
| APA | 郭红霞 , 秦周阳 , 程一辰 , 李明晔 , 王子莹 , 刘孟茜 et al. 一种聚合物固态聚电解质的改性方法 : CN202110122226.9. | 2021-01-28 . |
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摘要 ：
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.
关键词 ：
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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摘要 ：
The magnetic property of soft magnetic material is much dependent on its shape and anisotropy. In this work, the flake-like FeNi3 particles with 3D-network structure have been synthesized through hydrazine reduction at ambient condition in the presence of sodium lignosulfonate (SLS). The morphology and crystalline structure of the FeNi3 nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and energy dispersion spectrum (EDS). Both of the static and dynamic magnetic property of the FeNi3 particles were investigated. The results indicated that the morphology of the FeNi3 particles changed from spherical to flake shape with increasing SLS concentration or reaction time. The possible mechanism on the variation of particles morphology was proposed. The static magnetic property indicated that the flake-like FeNi3 showed a higher saturation magnetization and coercivity than that of the spherical particles. Dynamic magnetic performance showed that the flake-like FeNi3 particles also exhibited significantly higher real part (μ') and imaginary part (μ') of the complex permeability than the spherical particles, especially in the range 0.6–1.0 GHz. © 2021 The Society of Powder Technology Japan
关键词 ：
Iron metallography Iron metallography Magnetic bubbles Magnetic bubbles Spheres Spheres Nanoparticles Nanoparticles Soft magnetic materials Soft magnetic materials Sodium Sodium Nanocrystalline materials Nanocrystalline materials Iron alloys Iron alloys Synthesis (chemical) Synthesis (chemical) High resolution transmission electron microscopy High resolution transmission electron microscopy Binary alloys Binary alloys Nitrogen compounds Nitrogen compounds Scanning electron microscopy Scanning electron microscopy Morphology Morphology Nickel metallography Nickel metallography Magnetic properties Magnetic properties Saturation magnetization Saturation magnetization
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| GB/T 7714 | Guo, Hongxia , Li, Mingye , Qin, Zhenping et al. Shape-controlled synthesis of flake-like FeNi3 nanoparticles based on sodium lignosulfonate [J]. | Advanced Powder Technology , 2021 , 32 (3) : 755-763 . |
| MLA | Guo, Hongxia et al. "Shape-controlled synthesis of flake-like FeNi3 nanoparticles based on sodium lignosulfonate" . | Advanced Powder Technology 32 . 3 (2021) : 755-763 . |
| APA | Guo, Hongxia , Li, Mingye , Qin, Zhenping , Li, Fan , Zhang, Xuehong , Wu, Wenzheng et al. Shape-controlled synthesis of flake-like FeNi3 nanoparticles based on sodium lignosulfonate . | Advanced Powder Technology , 2021 , 32 (3) , 755-763 . |
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