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Coupling Co-Ni phosphides for energy-saving alkaline seawater splitting

Nano Research 2024年第6期17卷 4797-4806页

作者： Weijia Liu Wenxian Liu Tong Hou Junyang Ding Zhigui Wang Ruilian Yin xingyuan san Ligang Feng Jun Luo Xijun Liu State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured MaterialsMOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Hebei Key Laboratory of Optic-electronic Information and Materials the College of Physics Science and TechnologyHebei UniversityBaoding 071002China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China

The coupling of energy-saving small molecule conversion reactions and hydrogen evolution reaction(HER)in seawater electrolytes can reduce the energy consumption of seawater electrolysis and mitigate chlorine corrosion ***,the fabrication of efficient multifunctional catalysts for this promising technology is of great ***,a heterostructured catalyst comprising CoP and Ni_(2)P on nickel foam(CoP/Ni_(2)P@NF)is reported for hydrazine oxidation(HzOR)-assisted alkaline seawater *** coupling of CoP and Ni_(2)P optimizes the electronic structure of the active sites and endows excellent electrocatalytic performance for HzOR and ***,the two-electrode HzOR-assisted alkaline seawater splitting(OHzS)cell based on the CoP/Ni_(2)P@NF required only 0.108 V to deliver 100 mA·cm^(−2),much lower than 1.695 V for alkaline seawater electrolysis ***,the OHzS cell exhibits satisfactory stability over 48 h at a high current density of 500 mA·cm^(−2).Furthermore,the CoP/Ni_(2)P@NF heterostructured catalyst also efficiently catalyzed glucose oxidation,methanol oxidation,and urea oxidation in alkaline seawater *** work paves a path for high-performance heterostructured catalyst preparation for energy-saving seawater electrolysis for H_(2) production.

关键词： seawater splitting heterostructure electrocatalysis hydrazine oxidation reaction hydrogen evolution reaction

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High energy storage performance in AgNbO_(3) relaxor ferroelectric films induced by nanopillar structure

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Journal of Materials Science & Technology 2023年第24期155卷 160-166页

作者： Xiang Li Jing Wang xingyuan san Ning Wang Lei Zhao Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province College Physics Science and Technology Hebei University Baoding 071002 China State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Huangpu Hydrogen Energy Innovation Center School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 China

Inspired by the increasing demand for energy-storage capacitors in electrical and electronic systems, dielectrics with high energy-storage performance have attracted more and more attention. AgNbO_(3) -based lead-free ceramics serve as one of the most promising environmental-friendly candidates. However, their energy storage optimization is seriously limited by the low breakdown strength. Fortunately, thin film as a form of AgNbO3 materials can effectively improve the breakdown strength. In this work, AgNbO_(3)film with ∼550 nm in thickness was deposited on SrRuO_(3 )/(001)SrTiO_(3) using pulsed laser deposition. The AgNbO_(3) film reveals typical relaxor ferroelectric hysteresis loops due to the new nanopillar structure, which contributes to high breakdown strength of up to 1200 kV cm^(-1) . Benefiting from the high breakdown strength, a recoverable energy storage density of 10.3 J cm^(-3) and an energy efficiency of 72.2% are obtained in the AgNbO_(3) film, which demonstrates the promising prospect of AgNbO_(3) film for energy storage applications.

关键词： AgNbO3 film Relaxor ferroelectrics Energy storage performance Nanopillar structure

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Zr_(2)SeB and Hf_(2)SeB:Two new MAB phase compounds with the Cr_(2)AlC-type MAX phase(211 phase)crystal structures

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Journal of Advanced Ceramics 2022年第11期11卷 1764-1776页

作者： Qiqiang ZHANG Yanchun ZHOU xingyuan san Wenbo LI Yiwang BAO Qingguo FENG Salvatore GRASSO Chunfeng HU Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China Hebei Key Lab of Optic–Electronic Information and Materials College of Physics Science and TechnologyHebei UniversityBaoding 071002China State Key Laboratory of Green Building Materials China Building Materials AcademyBeijing 100024China

The ternary or quaternary layered compounds called MAB phases are frequently mentioned recently together with the well-known MAX ***,MAB phases are generally referred to layered transition metal borides,while MAX phases are layered transition metal carbides and nitrides with different types of crystal structure although they share the common nano-laminated structure *** order to prove that MAB phases can share the same type of crystal structure with MAX phases and extend the composition window of MAX phases from carbides and nitrides to borides,two new MAB phase compounds Zr_(2)SeB and Hf_(2)SeB with the Cr_(2)AlC-type MAX phase(211 phase)crystal structure were discovered by a combination of first-principles calculations and experimental verification in this ***-principles calculations predicted the stability and lattice parameters of the two new MAB phase compounds Zr_(2)SeB and Hf_(2)*** they were successfully synthesized by using a thermal explosion method in a spark plasma sintering(SPS)*** crystal structures of Zr_(2)SeB and Hf_(2)SeB were determined by a combination of the X-ray diffraction(XRD),scanning electron microscopy(SEM),and high-resolution transmission electron microscopy(HRTEM).The lattice parameters of Zr_(2)SeB and Hf_(2)SeB are a=3.64398Å,c=12.63223Åand a=3.52280Å,c=12.47804Å,*** the atomic positions are M at 4f(1/3,2/3,0.60288[Zr]or 0.59889[Hf]),Se at 2c(1/3,2/3,1/4),and B at 2a(0,0,0).And the atomic stacking sequences follow those of the Cr_(2)AlC-type MAX *** work opens up the composition window for the MAB phases and MAX phases and will trigger the interests of material scientists and physicists to explore new compounds and properties in this new family of materials.

关键词： Zr_(2)SeB and Hf_(2)SeB MAB phase MAX phase first-principles calculations thermal explosion synthesis

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A new artificial photosynthetic system coupling photovoltaic electrocatalysis with solar heating catalysis

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National Science Open 2023年第6期2卷 17-28页

作者： Yaguang Li Fanqi Meng Xianhua Bai Dachao Yuan xingyuan san Shufang Wang Lin Gu Qingbo Meng Research Center for Solar Driven Carbon Neutrality Hebei Key Lab of Optic-electronic Information and MaterialsThe College of Physics Science and TechnologyInstitute of Life Science and Green DevelopmentHebei UniversityBaoding 071002China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China College of Mechanical and Electrical Engineering Hebei Agricultural UniversityBaoding 071001China

In this work,we present a novel artificial photosynthetic paradigm with square meter(m^(2))level scalable production by integrating photovoltaic electrolytic water splitting device and solar heating CO_(2)hydrogenation device,successfully achieving the synergy of 1 sun driven 19.4%solar to chemical energy efficiency(STC)for CO production(2.7 times higher than that of large-sized artificial photosynthetic systems)with a low cost(equivalent to 1/7 of reported artificial photosynthetic systems).Furthermore,the outdoor artificial photosynthetic demonstration with 1.268 m^(2)of scale exhibits the CO generation amount of 258.4 L per day,the STC of~15.5%for CO production in winter,which could recover the cost within 833 sunny days of operation by selling CO.

关键词： artificial photosynthetic photovoltaic electrocatalysis solar heating catalysis CO_(2)hydrogenation low cost

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Incorporating element doping and quantum dot embedding effects to enhance the thermoelectric properties of higher manganese silicides

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Journal of Materiomics 2021年第2期7卷 377-387页

作者： Qing Wang Shiyu Song Xiaofeng Yang Ziyang Liu Yufei Ma xingyuan san Jianglong Wang Dan Zhang Shu-Fang Wang Zhiliang Li Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province College of Physics Science and TechnologyHebei UniversityBaoding071002China Institute of Life Science and Green Development Hebei UniversityBaoding071002China

Element doping and nano-inclusion embedding are effective approaches to enhance the electrical conductivities and decrease the lattice thermal conductivities of thermoelectric(TE)materials,***,the intrinsic low electrical thermal conductivities and high electrical properties are severely sacrificed,and the final figure of merit(ZT)is usually *** this study,Ag doping and Pt quantum dot(QD)embedding were synchronously achieved via embedding Ag/Pt alloy QDs into the higher manganese silicides to avoid the conventional single-element doping *** power factor(at 823 K)was enhanced from 1.57×10^(-3) W m^(-1) K^(-2) to 1.82×10^(-3) W m^(-1) K^(-2)(-16%)due to the-18%increase in carrier concentration that was derived from the Ag doping ***,the lattice thermal conductivity(at 823 K)decreased from 2.65 W m^(-1) K^(-1) e1.92 W m^(-1) K^(-1)(-28%)because of the broadband phonon scattering effect that resulted from the residual Pt QDs ***,the optimal ZT value increased by-52%from 0.42 to 0.64 at 823 *** study demonstrated that incorporating metastable alloy QDs to obtain element doping and nano-inclusion embedding effects is a novel and feasible means to enhance the ZT value of *** method is also possibly applicable to other alloy QD/TE composites.

关键词： Quantum dot Inclusion Higher manganese silicide Thermoelectric material Figure of merit

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Single crystalline CH_3NH_3PbI_3 self-grown on FTO/TiO_2 substrate for high efficiency perovskite solar cells

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Science Bulletin 2017年第17期62卷 1173-1176页

作者： Jinjin Zhao Guoli Kong Shulin Chen Qian Li Boyuan Huang Zhenghao Liu xingyuan san Yujia Wang Chen Wang Yunce Zhen Haidan Wen Peng Gao Jiangyu Li School of Materials Science and Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043China Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Electron Microscopy Laboratory and International Center for Quantum MaterialsSchool of PhysicsPeking UniversityBeijing 100871China X-ray Science Division Argonne National LaboratoryLemontIL 60439USA Department of Mechanical Engineering University of WashingtonSeattleWA 98195-2600USA Shenyang National Laboratory for Materials Science(SYNL) Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Collaborative Innovation Center of Quantum Matter Beijing 100871China Srate Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China

Since its first report in 2009,CH_3NH_3PbI_3-based perovskite solar cells(PSCs)have emerged as one of the most exciting developments in the next generation photovoltaic(PV)technologies[1],with its PV conversion effici... 详细信息

关键词：太阳能电池钙钛矿型二氧化钛基电池效率单晶高生长 PSCs 光电转换效率

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通过键共价性增加策略获得高性能Cu_(3)SbSe_(4)基热电材料

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Science China Materials 2023年第9期66卷 3644-3650页

作者：张旦钟瑞奇高仕康杨磊徐芳何平柳冠楠伞星源杨君友罗裕波王淑芳 Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province College of Physics Science and TechnologyHebei UniversityBaoding 071002China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

通过Cu_(3)SbSe_(4)-MTe (M=Ge/Sn)固溶体系的对比研究,本文报道了一种增加键共价性来弱化电声耦合进而获得高迁移率的策略,也证实了该策略能提升Cu_(3)SbSe_(4)化合物的热电性能.研究发现,相比于SnTe固溶,GeTe固溶赋予Cu_(3)SbSe_(4)... 详细信息

通过Cu_(3)SbSe_(4)-MTe (M=Ge/Sn)固溶体系的对比研究,本文报道了一种增加键共价性来弱化电声耦合进而获得高迁移率的策略,也证实了该策略能提升Cu_(3)SbSe_(4)化合物的热电性能.研究发现,相比于SnTe固溶,GeTe固溶赋予Cu_(3)SbSe_(4)化合物在相似载流子浓度情况下更高的迁移率,进而获得更优越的电输运性能.密度泛函理论计算表明,与SnTe固溶相比,GeTe固溶能增加Cu_(3)SbSe_(4)化学键共价性因而具有优越的电输运性能.最终,在Cu_(3)SbSe_(4)-1%GeTe样品中取得了0.8的最大热电优值(@648 K)和0.41的平均热电优值(300–648 K).此研究表明,通过增加键共价性来弱化电声耦合进而获得高迁移率是提升热电性能的有效途径.

关键词：密度泛函理论计算共价性热电性能热电优值高迁移率热电材料载流子浓度

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五子散结散中药封包联合消核散结胶囊治疗乳癖病肝郁痰凝证患者的效果

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中国民康医学 2022年第17期34卷 107-109,116页

作者：何芝谭金枝陈杏元王贤彬浏阳市中医医院湖南浏阳410300

目的:观察五子散结散中药封包联合消核散结胶囊治疗乳癖病肝郁痰凝证患者的效果。方法:选取2020年1—12月该院收治的98例乳癖病肝郁痰凝证患者进行前瞻性研究。按照随机数字表法分为对照组与观察组各49例。对照组给予院内制剂消核散结... 详细信息

目的:观察五子散结散中药封包联合消核散结胶囊治疗乳癖病肝郁痰凝证患者的效果。方法:选取2020年1—12月该院收治的98例乳癖病肝郁痰凝证患者进行前瞻性研究。按照随机数字表法分为对照组与观察组各49例。对照组给予院内制剂消核散结胶囊治疗,观察组在对照组基础上联合五子散结散中药封包治疗。治疗3个月后,比较两组临床疗效,治疗前后中医证候积分、乳房肿块最大直径,以及不良反应发生率。结果:治疗后,两组中医证候积分均低于治疗前,且观察组低于对照组,差异有统计学意义(P0.05)。结论:五子散结散中药封包联合消核散结胶囊治疗乳癖病肝郁痰凝证患者,可提高治疗总有效率,降低中医证候积分,缩小乳房肿块最大直径,效果优于单纯消核散结胶囊治疗。

关键词：五子散结散中药封包治疗乳癖病肝郁痰凝证中医证候积分不良反应

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抑制次同步和低频振荡的多通道直流附加阻尼控制器设计

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电力自动化设备 2014年第3期34卷 89-93页

作者：赵睿李兴源刘天琪王渝红杨毅强李宽四川大学电气信息学院四川成都610065

采用矩阵束算法分析了实际交直流混合输电系统在孤岛运行方式下次同步和低频振荡共存的现象,并获得保留系统关键特性的低阶模型。采用带通滤波器分离低频和次同步振荡模态,基于降阶模型设计多通道直流附加阻尼控制器。该控制器能够降低... 详细信息

采用矩阵束算法分析了实际交直流混合输电系统在孤岛运行方式下次同步和低频振荡共存的现象,并获得保留系统关键特性的低阶模型。采用带通滤波器分离低频和次同步振荡模态,基于降阶模型设计多通道直流附加阻尼控制器。该控制器能够降低振荡模式间的相互影响,通过单独调节各通道的增益、相位、输出限幅及滤波器参数为不同频段的振荡提供恰当的阻尼,进而同时抑制次同步和低频振荡。EMTDC/PSCAD实例仿真证明了控制器的有效性。

关键词：次同步振荡低频振荡直流附加阻尼控制 “三华”电网阻尼

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