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Mutual Self‑Regulation of d‑Electrons of Single Atoms and Adjacent Nanoparticles for Bifunctional Oxygen Electrocatalysis and Rechargeable Zinc‑Air Batteries

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Nano-Micro Letters 2023年第4期15卷 40-57页

作者： Sundaram Chandrasekaran Rong Hu Lei Yao Lijun Sui Yongping Liu Amor Abdelkader Yongliang Li Xiangzhong Ren libo deng College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China College of Chemistry and Bioengineering Guilin University of TechnologyGuilin 541004People’s Republic of China Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advanced Technology of CeramicsCollege of Materials Science and EngineeringGuangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen UniversityShenzhen 518060People’s Republic of China Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials Institute of New Energy for VehiclesSchool of Materials Science and EngineeringTongji UniversityShanghai 201804People’s Republic of China Department of Design and Engineering Faculty of Science&TechnologyBournemouth UniversityPoole BH125BBDorsetUK

Rechargeable zinc-air batteries(ZABs)are a promising energy conversion device,which rely critically on electrocatalysts to accelerate their rate-determining reactions such as oxygen reduction(ORR)and oxygen evolution reactions(OER).Herein,we fabricate a range of bifunctional M-N-C(metal-nitrogen-carbon)catalysts containing M-Nx coordination sites and M/MxC nanoparticles(M=Co,Fe,and Cu)using a new class ofγ-cyclodextrin(CD)based metal-organic framework as the precursor.With the two types of active sites interacting with each other in the catalysts,the obtained Fe@C-FeNC and Co@C-CoNC display superior alkaline ORR activity in terms of low half-wave(E1/2)potential(~0.917 and 0.906 V,respectively),which are higher than Cu@C-CuNC(~0.829 V)and the commercial Pt/C(~0.861 V).As a bifunctional electrocatalyst,the Co@C-CoNC exhibits the best performance,showing a bifunctional ORR/OER overpotential(ΔE)of~0.732 V,which is much lower than that of Fe@C-FeNC(~0.831 V)and Cu@C-CuNC(~1.411 V),as well as most of the robust bifunctional electrocatalysts reported to date.Synchrotron X-ray absorption spectroscopy and density functional theory simulations reveal that the strong electronic correlation between metallic Co nanoparticles and the atomic Co-N4 sites in the Co@C-CoNC catalyst can increase the d-electron density near the Fermi level and thus effectively optimize the adsorption/desorption of intermediates in ORR/OER,resulting in an enhanced bifunctional electrocatalytic performance.The Co@C-CoNC-based rechargeable ZAB exhibited a maximum power density of 162.80 mW cm^(−2) at 270.30 mA cm^(−2),higher than the combination of commercial Pt/C+RuO2(~158.90 mW cm^(−2) at 265.80 mA cm^(−2))catalysts.During the galvanostatic discharge at 10 mA cm^(−2),the ZAB delivered an almost stable discharge voltage of 1.2 V for~140 h,signifying the virtue of excellent bifunctional ORR/OER electrocatalytic activity.

关键词： Cyclodextrin CD-MOF Single-atom catalyst ORR/OER Zinc-air battery

Coupling of piezocatalysis and photocatalysis for efficient degradation of methylene blue by Bi_(0.9)Gd_(0.07)La_(0.03)FeO_(3) nanotubes

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Journal of Advanced Ceramics 2022年第7期11卷 1069-1081页

作者： Angom Devadatta MANI Jie LI Ziquan WANG Jiale ZHOU Huaicheng XIANG Jinlai ZHAO libo deng Haitao YANG Lei YAO Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advanced Technology of CeramicsGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518071China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China cCollege of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518071China

Photocatalytic degradation of organic pollutants is of great significance for wastewater remediation but is still hindered by the poor catalytic efficiency of the catalysts.Herein,we report a strategy to simultaneously introduce piezocatalysis and to enhance the intrinsic photocatalysis in a single catalyst,which improved the performance for catalytic degradation of methylene blue(MB)significantly.Specifically,piezoelectric BiFeO_(3)(BFO)nanotube doped with different contents of Gd and La(Bi_(0.9)(GdxLa_(1−x))0.1FeO_(3))were produced by electrospinning.The doping led to a higher concentration of surface oxygen vacancy(OV)in Bi_(0.9)Gd_(0.07)La_(0.03)FeO_(3),which effectively increased the piezoelectric field due to the deformation of BFO,and suppressed the recombination of photon-generated electron–hole pairs.The Bi_(0.9)Gd_(0.07)La_(0.03)FeO_(3)nanotube showed excellent catalytic performance under simultaneous light irradiation and ultrasonic excitation,giving an extraordinary 95%degradation of MB within 90 min.These findings suggest that the piezoelectric effect combined with defect engineering can enhance the catalytic performance of Bi_(0.9)Gd_(0.07)La_(0.03)FeO_(3)nanotube.This could potentially be extended to other catalytic systems for high-performance pollutant treatment.

关键词： photocatalysis piezocatalysis sonophotocatalysis oxygen vacancy(OV)

葡萄糖衍生多孔碳的表面电荷调控与电吸附Cd^(2+)性能

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材料导报 2024年第6期38卷 18-25页

作者：覃玲霜刘醒邓立波深圳大学化学与环境工程学院广东深圳518055

电容去离子(CDI)是一种基于静电吸附的脱盐技术,由于其操作简便、能耗低、无二次污染等优点,有望用于冶金、电镀等行业所产生的废水中Cd^(2+)的去除。目前限制其发展的关键难题在于电极材料对Cd^(2+)的吸附容量较低。以葡萄糖为碳源,以... 详细信息

电容去离子(CDI)是一种基于静电吸附的脱盐技术,由于其操作简便、能耗低、无二次污染等优点,有望用于冶金、电镀等行业所产生的废水中Cd^(2+)的去除。目前限制其发展的关键难题在于电极材料对Cd^(2+)的吸附容量较低。以葡萄糖为碳源,以硫脲与硫粉为掺杂剂,通过高温碳化制备了S、N共掺杂的多孔碳材料。以所制备的碳材料为电极组装了CDI系统,测试了其电吸附Cd^(2+)的性能。以相同的电极材料组装的对称型CDI系统在1.2 V下对Cd^(2+)的吸附容量达到53 mg·g^(-1)。进一步研究发现,S、N掺杂使碳材料表面带有负电荷,因此,以其为阴极、电中性的商业活性炭YP-50F为阳极组装的非对称CDI系统的吸附容量达到88.37 mg·g^(-1),比对称体系高66.73%;而且经过七次吸-脱附循环后,容量保持率也由对称体系的62.2%提升至81.5%。通过XPS分析证明电极去除Cd^(2+)的机理为双电层与碳材料表面官能团络合的协同作用。本工作所开发的高性能多孔碳电极及非对称电极的匹配策略有望推动CDI技术在Cd^(2+)及其他重金属废水治理领域的应用。

关键词：电容去离子葡萄糖多孔碳镉离子表面电荷

In-situ encapsulation ofα-Fe_(2)O_(3) nanoparticles into ZnFe_(2)O_(4) micro-sized capsules as high-performance lithium-ion battery anodes

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Journal of Materials Science & Technology 2021年第16期75卷 110-117页

作者： Wei Wu Yongshan Wei Hongjiang Chen Keyan Wei Zhitong Li Jianhui He libo deng Lei Yao Haitao Yang Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advanced Technology of CeramicsGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Transition metal oxides as anode materials for high-performance lithium-ion batteries suffer from severe capacity decay,originating primarily from particle pulverization upon volume expansion/shrinkage and the intrinsically sluggish electron/ion transport.Herein,in-situ encapsulation ofα-Fe_(2)O_(3) nanoparticles into micro-sized ZnFe_(2)O_(4) capsules is facilely fulfilled through a co-precipitation process and followed by heat-treatment at optimal calcination temperature.The porous ZnFe_(2)O_(4) scaffold affords a synergistic confinement effect to suppress the grain growth ofα-Fe2 O3 nanocrystals during the calcination process and to accommodate the stress generated by volume expansion during the charge/discharge process,leading to an enhanced interfacial conductivity and inhibit electrode pulverization and mechanical failure in the active material.With these merits,the preparedα-Fe_(2)O_(3)/Fe_(2)O_(4) composite delivers prolonged cycling stability and improved rate capability with a higher specific capacity than soleα-Fe_(2)O_(3) and Fe_(2)O_(4).The discharge capacity is retained at 700 mAh g-1 after 500 cycles at 200 mA g^(-1) and 940 mAh g^(-1) after 50 cycles at 100 m A g^(-1).This work provides a new perspective in designing transition metal oxides for advanced lithium-ion batteries with superior electrochemical properties.

关键词： α-Fe_(2)O_(3)/ZnFe_(2)O_(4)ceramic composite Co-precipitation process Confinement effect Interfacial effect Grain growth High conductivity Lithium-ion battery anodes

Supramolecular-mediated ball-in-ball porous carbon nanospheres for ultrafast energy storage

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InfoMat 2022年第4期4卷 112-123页

作者： Lei Yao Junsheng Lin Yuanyuan Chen Xiujuan Li Dongrui Wang Haitao Yang libo deng Zijian Zheng College of Materials Science and Engineering Shenzhen UniversityShenzhenP.R.China Laboratory for Advanced Interfacial Materials and Devices Institute of Textiles and ClothingThe Hong Kong Polytechnic UniversityHong Kong SARChina College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhenP.R.China

Hierarchical porous carbons are the most viable electrode material for supercapacitors because of their balanced capacitive performance and chemical stability.Their pore connectivity plays a pivotal role in electrolyte transport,which is quantified by a new parameter,defined in this work as the longest possible pore separation(LPPS).Herein,we report hierarchical porous carbon nanospheres(HPC-NS)with a unique ball-in-ball structure,which is achieved by the pyrolysis of a supramolecular complex ofγ-cyclodextrin(γ-CD)/PEO-PPO-PEO(F127).This approach differs from the conventional softtemplating method in that,apart from the assembly of the monomicelles that leads to the host nanospheres(approximately 300 nm),theγ-CD-containing monomicelles themselves are converted to small porous carbon nanospheres(<10 nm),which results in an ultralow LPPS of 10 nm,representing the bestknown pore connectivity of the HPC family.The HPC-NS delivers a high specific capacitance(405 F g^(-1)at 1 A g^(-1)and 71%capacitance retention at 200 A g^(-1)),wide voltage window(up to 1.6 V),and simultaneously high energy and power densities(24.3 Wh kg^(-1)at a power density of 151 W kg^(-1)and 9 Wh kg^(-1)at 105 W kg^(-1))in aqueous electrolytes.This new strategy boosts the development of porous carbon electrodes for aqueous supercapacitors with simultaneously high power and energy densities.

关键词： hierarchical porous carbon pore connectivity supramolecular ultrafast energy storage

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超大超深基坑降水自动化管控系统的研制

建筑施工 2024年第3期46卷 347-350页

作者：龙莉波邓亮王彭宇上海建工二建集团有限公司上海200080 上海建筑工程逆作法工程技术研究中心上海200080 上海长凯岩土工程有限公司上海200080

结合上海浦东机场南区地下交通枢纽及配套工程,对降水自动化管控系统在超大超深基坑中的应用进行了分析,该系统有效解决了承压水高风险基坑的水位安全管控难题。总结了降水自动化管控系统在工程实践中的运行管理维护经验,针对降水自动... 详细信息

结合上海浦东机场南区地下交通枢纽及配套工程,对降水自动化管控系统在超大超深基坑中的应用进行了分析,该系统有效解决了承压水高风险基坑的水位安全管控难题。总结了降水自动化管控系统在工程实践中的运行管理维护经验,针对降水自动化管控系统的设计提出了安全可靠原则,针对降水系统应用中的控制参数设置提出了均衡适度原则,针对降水自动化管控系统的运行管理提出了人机协同原则,以期为类似工程提供参考。

关键词：深基坑承压水控制自动化降水工程管控系统

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连翘在园林绿化中的应用模式研究

现代农业研究 2024年第4期30卷 64-66页

作者：刘立波邓洁刘雅兰凯里学院大健康学院贵州凯里556011

连翘作为广泛应用于园林绿化的植物,在环境适应性、美学价值以及生态功能方面具备独特优势,因而成为园林绿化研究的重点。连翘不仅以春季绚丽的黄色花朵著称,也因其对城市复杂环境的高度适应能力而广受青睐。本文旨在探索连翘在园林绿... 详细信息

连翘作为广泛应用于园林绿化的植物,在环境适应性、美学价值以及生态功能方面具备独特优势,因而成为园林绿化研究的重点。连翘不仅以春季绚丽的黄色花朵著称,也因其对城市复杂环境的高度适应能力而广受青睐。本文旨在探索连翘在园林绿化中的多样化应用模式,分析其在不同城市绿化环境中的功能和作用,以期为城市园林绿化提供更多元化且生态友好的植物应用策略。

关键词：连翘园林绿化应用模式

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考虑低碳交通的电动汽车充电站优化配置方法

浙江电力 2024年第6期43卷 69-79页

作者：宣羿樊立波孙智卿蒋建陈铎文邓凯王梦瑶国网浙江省电力有限公司杭州供电公司杭州310007 上海电力大学电气工程学院上海200090

交通运输产生的碳排放是城市碳排放的主要来源之一,而城市充电站规划中较少考虑交通碳排放因素。对此,提出了一种考虑低碳交通约束的电动汽车充电站优化配置方法。首先,基于充电站候选点划分区域碳排放测算网格,在此基础上考虑充电站位... 详细信息

交通运输产生的碳排放是城市碳排放的主要来源之一,而城市充电站规划中较少考虑交通碳排放因素。对此,提出了一种考虑低碳交通约束的电动汽车充电站优化配置方法。首先,基于充电站候选点划分区域碳排放测算网格,在此基础上考虑充电站位置、容量等因素的影响并建立网格化交通碳排放模型;然后,建立综合考虑碳排放量、交通能源结构、交通电力能源清洁度以及充电站使用率四个因素的低碳交通指标体系,量化分析充电站规划方案对交通碳排放的影响;之后,以低碳交通指标为约束条件,兼顾经济性和节能减排,建立考虑交通碳排放因素的双目标优化配置模型;最后,通过某地区案例对所提方法进行仿真验证,结果表明,考虑低碳交通约束的优化配置方法可以在不增加投资成本的同时有效降低城市各区域交通碳排放水平。

关键词：低碳交通碳排放电动汽车充电站优化配置

乡村振兴背景下农村脱贫家庭转出劳动力返乡意愿及影响因素

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四川师范大学学报（自然科学版） 2024年第3期47卷 338-345页

作者：何田邓睿朗雨廖和平青丽波四川师范大学地理与资源科学学院四川成都610101 西南大学地理科学学院重庆400715 四川省绵阳中学四川绵阳621000

利用2021年课题组在贵州省关岭县调查的1 518份样本数据,基于二元Logistic概率函数,从劳动力个体、家庭、转移就业、所在村庄特征等方面分析农村脱贫家庭转出劳动力返乡意愿特征及影响因素,对巩固脱贫和实施乡村振兴战略具有重要的现实... 详细信息

利用2021年课题组在贵州省关岭县调查的1 518份样本数据,基于二元Logistic概率函数,从劳动力个体、家庭、转移就业、所在村庄特征等方面分析农村脱贫家庭转出劳动力返乡意愿特征及影响因素,对巩固脱贫和实施乡村振兴战略具有重要的现实意义.研究发现,脱贫家庭转出劳动力返乡意愿较为强烈,男性、年龄偏大、受教育程度低的转出劳动力更愿意返乡;家庭务工人数对劳动力返乡有负向影响,随迁子女在城市中入学成本较高,更愿意送回当地农村地区就读,转出劳动力因抚养负担加重而选择返乡;省内和省外长距离转移的劳动力,对家中住房、耕地维护不足,逐渐适应城市工作生活方式,返回农村的意愿较弱;村庄交通区位条件越便捷,更容易享受教育、医疗等公共服务设施,转出劳动力更倾向于返乡.同时,耕地资源较好、基础设施完善、拥有特色旅游资源的村庄,具有更好的乡村振兴基础条件,对劳动力返乡具有更强的吸引力.

关键词：脱贫家庭返乡意愿转出劳动力少数民族贵州关岭县