检索结果-南通市图书馆

Boost oxygen reduction reaction performance by tuning the active sites in Fe-N-P-C catalysts

Journal of Energy Chemistry 2021年第4期30卷 572-579页

作者： yahao li Ketao Zang Xuezhi Duan Jun Luo De Chen Department of Chemical Engineering Norwegian University of Science and TechnologyN-7491 TrondheimNorway State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand Department of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool of MaterialsTianjin University of TechnologyTianjin 300384China

Cost-effective atomically dispersed Fe-N-P-C complex catalysts are promising to catalyze the oxygen reduction reaction(ORR)and replace Pt catalysts in fuel cells and metal-air ***,it remains a challenge to increase the number of atomically dispersed active sites on these *** we report a highly efficient impregnation-pyrolysis method to prepare effective ORR electrocatalysts with large amount of atomically dispersed Fe active sites from *** types of active catalyst centers were identified,namely atomically dispersed Fe sites and Fe_(x)P *** ORR rate of the atomically dispersed Fe sites is three orders of magnitude higher than it of Fe_(x)P particles.A linear correlation between the amount of the atomically dispersed Fe and the ORR activity was obtained,revealing the major contribution of the atomically dispersed Fe to the ORR *** number of atomically dispersed Fe increases as the Fe loading increased and reaching the maximum at 1.86 wt%Fe,resulting in the maximum ORR *** Fe-N-P-C complex catalyst was used as the cathode catalyst in a homemade Zn-air battery and good performance of an energy density of 771 Wh kgZn^(-1),a power density of 92.9 m W cm^(-2) at 137 m A cm^(-2) and an excellent durability were exhibited.

关键词： Oxygen reduction reaction Fe electrocatalyst Atomically dispersed active center Activity tuning Zn-air battery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

lithiophilicity: The key to efficient lithium metal anodes for lithium batteries

引用

Journal of Energy Chemistry 2023年第2期77卷 123-136,I0004页

作者： yahao li Yue li Lulu Zhang Huachao Tao Qingyu li Jiujun Zhang Xuelin Yang Hubei Provincial Collaborative Innovation Center for New Energy Microgrid College of Electrical Engineering&New EnergyChina Three Gorges UniversityYichang 443002HubeiChina Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemical and Pharmaceutical ScienceGuangxi Normal UniversityGuilin 541004GuangxiChina College of Materials Sciences and Engineering Fuzhou UniversityFuzhou 350108FujianChina Department of Chemical and Biochemical Engineering University of British ColumbiaVancouverBC V6T 1W5Canada

lithium metal anode of lithium batteries,including lithium-ion batteries,has been considered the anode for next-generation batteries with desired high energy densities due to its high theoretical specific capacity(3860 mA h g^(-1))and low standards electrode potential(-3.04 V ***).However,the highly reactive nature of metallic lithium and its direct contact with the electrolyte could lead to severe chemical reactions,leading to the continuous consumption of the electrolyte and a reduction in the cycle life and Coulombic *** addition,the solid electrolyte interface formed during battery cycling is mainly inorganic,which is too fragile to withstand the extreme volume change during the plating and stripping of *** uneven flux of lithium ions could lead to excessive lithium deposition at local points,resulting in needle-like lithium dendrites,which could pierce the separator and cause short circuits,battery failure,and safety *** the last five years,tremendous efforts have been dedicated to addressing these issues,and the most successful improvements have been related to lithiophilicity ***,this paper comprehensively reviewed the lithiophilicity regulation in lithium metal anode modifications and highlighted the vital effect of *** remaining challenges faced by the lithiophilicity optimization for lithium metal anodes are discussed with the proposed research directions for overcoming the technical challenges in this subject.

关键词： lithium metal anode lithiophilicity optimization Host Artificial SEI Nucleation sites Dendrite growth

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Characterization of bacteriophage BUCT631 lytic for K1 Klebsiella pneumoniae and its therapeutic efficacy in Galleria mellonella larvae

引用

Virologica Sinica 2023年第5期38卷 801-812页

作者： Pengjun Han Mingfang Pu yahao li Huahao Fan Yigang Tong College of life Science and Technology Beijing University of Chemical TechnologyBeijing100029China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing100029China

Severe infections caused by multidrug-resistant Klebsiella pneumoniae(***)highlight the need for new therapeutics with activity against this *** therapy is an alternative treatment approach for multidrug-resistant *** ***,we report a novel bacteriophage(phage)BUCT631 that can specifically lyse capsule-type K1 *** characterization revealed that phage BUCT631 could rapidly adsorb to the surface of *** and form an obvious halo ring,and it had relatively favorable thermal stability(4–50C)and pH tolerance(pH?4–12).In addition,the optimal multiplicity of infection(MOI)of phage BUCT631 was 0.01,and the burst size was approximately 303 PFU/*** analysis showed that phage BUCT631 has double-stranded DNA(total length of 44,812 bp)with a G t C content of 54.1%,and the genome contains 57 open reading frames(ORFs)and no virulence or antibiotic resistance related *** on phylogenetic analysis,phage BUCT631 could be assigned to a new species in the genus Drulisvirus of the subfamily *** addition,phage BUCT631 could quickly inhibit the growth of *** within 2 h in vitro and significantly elevated the survival rate of *** infected Galleria mellonella larvae from 10%to 90%in *** studies suggest that phage BUCT631 has promising potential for development as a safe alternative for control and treatment of multidrug-resistant *** infection.

关键词： Bacteriophage BUCT631 Klebsiella pneumoniae Genomic analysis Phage therapy Galleria mellonella

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Dielectric polarization in MgFe_(2)O_(4) coating and bulk doping to enhance high-voltage cycling stability of Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2) cathode material

引用

Journal of Energy Chemistry 2023年第6期81卷 200-211,I0007页

作者： Xiaoqian Xu Yizhen Huang Dan li Qichang Pan Sijiang Hu yahao li Hongqiang Wang Youguo Huang Fenghua Zheng Qingyu li Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004GuangxiChina Hubei Provincial Collaborative Innovation Center for New Energy Microgrid College of Electrical Engineering&New EnergyChina Three Gorges UniversityYichang 443002HubeiChina Guangxi Scientific and Technological Achievements Transformation Pilot Research Base of Electrochemical Energy Materials and Devices Guangxi Normal UniversityGuilin 541004GuangxiChina

Charging P2-Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2)to 4.5 V for higher capacity is ***,it leads to severe capacity fading,ascribing to the lattice oxygen evolution and the P2-O2 phase ***,the Mg Fe_(2)O_(4) coating and Mg,Fe co-doping were constructed simultaneously by Mg,Fe surface treatment to suppress lattice oxygen evolution and P2-O2 phase transformation of P2-Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2)at deep *** ex-situ X-ray diffraction(XRD)tests,we found that the Mg,Fe bulk co-doping could reduce the repulsion between transition metals and Na+/vacancies ordering,thus inhibiting the P2-O2 phase transition and significantly reducing the irreversible volume change of the ***,the internal electric field formed by the dielectric polarization of Mg Fe_(2)O_(4) effectively inhibits the outward migration of oxidized O^(a-)(aling performance with capacity retentions of 84.8% and 81.3%at 0.1 and 1 C after *** work sheds light on regulating the surface chemistry for Na-layered oxide materials to enhance the high-voltage performance of Na-ion batteries.

关键词： P2-Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2) MgFe_(2)O_(4) Bulk doping Lattice oxygen evolution P2-O2 phase transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

TiC/C core/shell nanowires arrays as advanced anode of sodium ion batteries

引用

Chinese Chemical Letters 2020年第3期31卷 846-850页

作者： Yanbin Shen yahao li Shengjue Deng Guoxiang Pan Qinqin Xiong Xiaokun Ding Yangfan Lu Qi liu Xinhui Xia Xiuli Wang Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Provinceand School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Department of Materials Chemistry Huzhou UniversityHuzhou 313000China College of Materials and Environmental Engineering Hangzhou Dianzi UniversityHangzhou 310018China Department of Chemistry Zhejiang UniversityHangzhou 310027China Department of Physics City University of Hong KongHong Kong 999077China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

High-perfo rmance anodes of sodium ion batteries(SIBs)largely depends on rational architecture design and binder-free smart ***,we report TiC/C core/shell nanowires arrays prepared by a one-step chemical vapor deposition(CVD)method and apply it as the anode of SIBs for the first *** conductive TiC core is intimately decorated with carbon *** as-obtained TiC/C nanowires are homogeneously grown on the substrate and show core/shell heterostructure and porous architecture with high electronic conductivity and reinforced *** to these merits,the TiC/C electrode displays good rate performance and outstanding cycling performance with a capacity of 135.3 mAh/g at 0.1 A/g and superior capacity retention of 90.14%after 1000 cycles at 2 A/*** reported strategy would provide a promising way to construct binder-free arrays electrodes for sodium ion storage.

关键词： Sodium ion batteries Nanowires Core/shell structure Carbon Titanium carbide

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

光伏阵列故障检测中的无人机红外图像拼接

引用

太阳能学报 2020年第3期41卷 262-269页

作者：毛峡李亚豪北京航空航天大学电子信息工程学院北京100191

红外遥感图像可用来检测光伏组件的异常发热,为获得大视野的地面信息需要图像拼接技术,该文提出一种基于快速鲁棒特征检测(speeded-up robust features,SURF)算子的红外光伏图像自动拼接算法。基于K-d树(Kdimension tree)算法的匹配结果... 详细信息

红外遥感图像可用来检测光伏组件的异常发热,为获得大视野的地面信息需要图像拼接技术,该文提出一种基于快速鲁棒特征检测(speeded-up robust features,SURF)算子的红外光伏图像自动拼接算法。基于K-d树(Kdimension tree)算法的匹配结果,结合匹配对的坐标信息提出一种优化算法,减少了随机抽样一致(random sample consensus,RANSAC)算法的迭代次数,并采用最佳缝合线算法进行图像融合;然后优化平移变换模型、修正旋转序列的角度,基于待拼接图像和模板之间的重叠区域自动修正拼接参数。实现从图像序列到全景图的全自动拼接流程。试验表明,该方法使RANSAC算法的迭代次数平均减少93.26%,处理时间平均减少86.21%。在没有无人机位置和飞行方向的少参数条件下,基本消除了光伏组件的几何相似性导致的误匹配和累计误差。

关键词：光伏组件红外图像图像拼接参数优化无人机遥感

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于IABC-ICA的随掘地震去噪方法

引用

煤炭学报 2022年第1期47卷 413-422页

作者：程久龙程鹏李亚豪中国矿业大学(北京)地球科学与测绘工程学院北京100083

随掘地震是利用掘进机切割岩石产生的振动作为震源来进行探测,具有安全、简便、高效等优点,但随掘地震探测所采集的地震记录中波组成分复杂,有效信号能量弱,且被掘进机工作时产生的强噪声干扰,信噪比极低,去噪难度大,需要对随掘地震记... 详细信息

随掘地震是利用掘进机切割岩石产生的振动作为震源来进行探测,具有安全、简便、高效等优点,但随掘地震探测所采集的地震记录中波组成分复杂,有效信号能量弱,且被掘进机工作时产生的强噪声干扰,信噪比极低,去噪难度大,需要对随掘地震记录去噪方法进行研究。通过改进人工蜂群(IABC)算法搜索策略,提高了人工蜂群算法的收敛速度和收敛精度,将改进人工蜂群算法作为独立分量分析(ICA)方法的优化算法,提高独立分量分析方法的信噪分离效果。建立随掘地震超前探测地质-地球物理模型,给定加噪的变频变幅连续信号作为随掘地震震源子波,采用有限差分法进行数值模拟,得到随掘地震的地震记录,并在仿真地震记录中加入随机噪声;采用基于改进人工蜂群的独立分量分析方法(IABC-ICA)进行噪声与有效信号的分离,在此基础上利用互相关和脉冲反褶积方法进行压缩子波处理,得到与采用雷克子波震源模拟地震记录一致的波场特征,验证了该方法的去噪效果。结合现场试验的实测数据,进行IABC-ICA去噪、互相关、反褶积等处理,从信噪比较低的实际地震记录中提取了有效波信号。研究表明:基于改进人工蜂群的独立分量分析方法能够较好地分离随掘地震记录中的有效信号和干扰噪声信号,改善随掘地震有效信号的提取质量。

关键词：随掘地震去噪独立分量分析改进人工蜂群算法有效信号提取

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Promoting exciton dissociation by metal ion modification in polymeric carbon nitride for photocatalysis

引用

Chinese Chemical Letters 2024年第12期35卷 188-192页

作者： Yue Pan Wenping Si yahao li Haotian Tan Ji liang Feng Hou Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education School of Materials Science and Engineering Tianjin University School of Material Science and Engineering Hebei University of Technology

Carbon nitride, a typical low-dimensional conjugated polymer photocatalyst, features a high exciton binding energy due to the weak dielectric screening and the strong Coulombic attraction of photogenerated electrons and holes. The reduction of the exciton binding energy of carbon nitride to promote the conversion from excitons into free carriers is the first priority for the improvement of charge-transfer-dependent photocatalytic reaction activity. In this paper, by introducing a variety of polar metal cations to carbon nitride, it is demonstrated that the charge distribution of the heptazine ring can be improved by ion polarization, which effectively promotes the dissociation of excitons into electrons and holes. The sodium ion shows the best modification effect, which enhances the rate of both photocatalytic hydrogen and hydrogen peroxide production by about 50%. Characterization shows that the introduction of strongly polar metal cations contributes to the reduction of the exciton dissociation energy of carbon nitride. This study provides a new perspective and a convenient method for the exciton modulation engineering of low-dimensional photocatalysts.

关键词： Exciton dissociation Carbon nitride Photocatalysis Alkali metal ions Exciton binding energy

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于可解释机器学习模型的难熔高熵合金相预测

引用

稀有金属材料与工程 2023年第4期52卷 1192-1200页

作者：赵凤媛叶益聪张周然李亚豪王洁唐宇李顺白书欣国防科技大学空天科学学院材料科学与工程系湖南长沙410073

采用k近邻(KNN)、支持向量机(SVM)、决策树(DT)、随机森林(RF)和人工神经网络(ANN)5种机器学习(ML)方法对RHEAs中固溶体(SS)、混合固溶体和金属间化合物(SS+IM)进行了分类和预测。选择了5个输入相预测参数作为特征以及139组RHEAs数据以... 详细信息

采用k近邻(KNN)、支持向量机(SVM)、决策树(DT)、随机森林(RF)和人工神经网络(ANN)5种机器学习(ML)方法对RHEAs中固溶体(SS)、混合固溶体和金属间化合物(SS+IM)进行了分类和预测。选择了5个输入相预测参数作为特征以及139组RHEAs数据以训练ML模型。结果表明,ANN模型的预测准确率最高,达到90.72%。9组新的四元和(TiVTa)_(x)Cr_(1-x)体系RHEAs的实验结果显示,RF和ANN的预测精度更高,精准预测了11个SS和3个SS+IM合金的相组成。采用了SHAP(SHapley Additive exPlanations)模型来解释精度最高的ANN模型,并研究每个特征对相形成的贡献。5个特征的重要性顺序是混合焓(ΔH_(mix))、原子尺寸差(δ)、价电子浓度(VEC)、混合熵(ΔS_(mix))和电负性差(Δ_(χ)),其中ΔH_(mix)的平均SHAP值大约是Δ_(χ)的5倍,是ΔS_(mix)的4倍。较大的ΔH_(mix)、较小的δ和VEC可能有助于RHEA中固溶体的形成。

关键词：机器学习难熔高熵合金模型可解释性固溶体金属间化合物

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

机器学习指导相和硬度可控的AlCoCrCuFeNi系高熵合金设计

引用

材料工程 2024年第1期52卷 153-164页

作者：李亚豪叶益聪赵凤媛唐宇朱利安白书欣国防科技大学空天科学学院材料科学与工程系长沙410073

采用机器学习辅助高熵合金设计,致力于解决传统试错实验方法时间周期长、成本高的问题。以经典的AlCoCrCuFeNi系高熵合金为研究对象,采用机器学习方法,分别构建高熵合金的相结构预测模型和硬度预测模型。其中支持向量机模型(SVM)在两个... 详细信息

采用机器学习辅助高熵合金设计,致力于解决传统试错实验方法时间周期长、成本高的问题。以经典的AlCoCrCuFeNi系高熵合金为研究对象,采用机器学习方法,分别构建高熵合金的相结构预测模型和硬度预测模型。其中支持向量机模型(SVM)在两个任务中均有最好的训练表现,最佳的相分类准确率达0.944,硬度预测模型的均方根误差为56.065HV。进一步串联两种机器学习模型,基于样本数据集上下限的成分空间,对AlCoCrCuFeNi系高熵合金同时进行相和硬度的高效预测和筛选,实现新型合金成分的快速设计。实验验证5种新合金符合相预测结果,测试硬度与预测硬度值的RMSE为12.58HV,表明建立的机器学习模型实现对高熵合金相和硬度的高效预测。

关键词：机器学习高熵合金相预测硬度预测成分设计

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：