检索结果-南通市图书馆

Tuning electrochemical water activation over NiIr single-atom alloy aerogels for stable electrochemiluminescence

Science Bulletin 2024年第15期69卷 2387-2394页

作者： Ling Ling Mengzhen Xi Hengjia Wang Runshi Xiao Lirong Zheng Liuyong Hu wenling gu Chengzhou Zhu State Key Laboratory of Green Pesticide International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsWuhan Institute of TechnologyWuhan 430205China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

The anodic oxygen evolution reaction is a well-acknowledged side reaction in traditional aqueous electrochemiluminescence(ECL) systems due to the generation and surface aggregation of oxygen at the electrode, which detrimentally impacts the stability and efficiency of ECL emission. However, the effect of reactive oxygen species generated during water oxidation on ECL luminophores has been largely overlooked. Taking the typical luminol emitter as an example, herein, we employed NiIr single-atom alloy aerogels possessing efficient water oxidation activity as a prototype co-reaction accelerator to elucidate the relationship between ECL behavior and water oxidation reaction kinetics for the first time. By regulating the concentration of hydroxide ions in the electrolyte, the electrochemical oxidation processes of both luminol and water are finely tuned. When the concentration of hydroxide ions in electrolyte is low,the kinetics of water oxidation is attenuated, which limits the generation of oxygen, effectively mitigates the influence of oxygen accumulation on the ECL strength, and offers a novel perspective for harnessing side reactions in ECL systems. Finally, a sensitive and stable sensor for antioxidant detection was constructed and applied to the practical sample detection.

关键词： Electrochemiluminescence Luminol Water activation Single-atom doping Sensing

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

Self-supported ternary Co0.5Mn0.5P/carbon cloth （CC） as a high-performance hydrogen evolution electrocatalyst

引用

Nano Research 2017年第3期10卷 1001-1009页

作者： Xiaoyan Zhang wenling gu Erkang Wang State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China University of Chinese Academy of Sciences Beijing 100049 China

Scalable production of earth-abundant, easy-to-prepare, and cost-effective electrocatalysts for the hydrogen evolution reaction （HER） is essential for sustainable energy-based systems. Herein, we systematically studied the electrocatalytic HER performance of a self-supported ternary Co0.5Mn0.5P/carbon cloth （CC） nanomaterial prepared using a hydrothermal reaction and phosphorizafion process. Electrochemical tests demonstrated that the ternary Co0.5Mn0.5P/CC nanomaterial could be a highly active electrocatalyst in acidic media, with overpotentials of only 41 and 89 mV, affording current densities of 10 and 100 ***-2, respectively, and a Tafel slope of 41.7 ***-1. Furthermore, the electrocatalyst exhibited superior stability, with 3,000 cycles of cyclic voltammetry from -0.2 to 0.2 V at a scan rate of 100 mV.s-1 and 40 h of static polarization at a fixed overpotential of large-scale hydrogen production. 83 mV, indicating its potential for

关键词： ternary Co0.5Mn0.5P/carbon cloth(CC) nanowire self-supported electrode hydrogen evolution

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

Enhancement of the hydrogen evolution performance by finely tuning the morphology of Co-based catalyst without changing chemical composition

引用

Nano Research 2019年第1期12卷 191-196页

作者： wenling gu Liuyong Hu Changshuai Shang Jing Li Erkang Wang State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Chinese Academy of Sciences Beijing 100049China

Transition-metal phosphides, as the promising alternatives to noble metal catalysts, have been widely used as efficient electrocatalysts for hydrogen evolution reaction (HER). In this work, three kinds of cobalt-8-hydroxyquinoline (Coqx) with different size and nanostructures are synthesized by varying the hydrothermal conditions, which was named as Coqx-L, Coqx-M and Coqx-S according to the decreased size. Accordingly, the CoxP/NC with three different size nanostructures (CoxP/NC-L, CoxP/NC-M and CoxP/NC-S) are obtained by the sequential carbonization and phosphidation of Coqx. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results imply the identical chemical composition in these catalysts with different morphologies. Thus, systematic study is carried out to reveal the relationship between catalytic performance and morphologies of materials with the same chemical composition. The experimental result indicates that the morphology of Cc)xP/NC plays a crucial role on the surface area and electron transfer. Finally, the catalyst of CoxP/NC-S with the smallest size nanostructrue exhibits the best HER performance with a low overpotential at current density of 10 mA/cm^2 (n = 56.9 and 115.6 mV) and a small Tafel slope (52.3 and 69.3 mV/dec) in both 0.1 M HCIO4 and 1.0M KOH as well as long-term stability.

关键词： electrocatalyst hydrogen evolution reaction transition-metal phosphides

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

Secondary-Atom-Doping Enables Robust Fe-N-C Single-Atom Catalysts with Enhanced Oxygen Reduction Reaction

引用

Nano-Micro Letters 2020年第11期12卷 281-291页

作者： Xin Luo Xiaoqian Wei Hengjia Wang wenling gu Takuma Kaneko Yusuke Yoshida Xiao Zhao Chengzhou Zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079People’s Republic of China Innovation Research Center for Fuel Cells The University of Electro-CommunicationsChofugaokaChofuTokyo 182‑8585Japan

Single-atom catalysts(SACs) with nitrogen-coordinated nonprecious metal sites have exhibited inimitable advantages in ***,a large room for improving their activity and durability ***,we construct atomically dispersed Fe sites in N-doped carbon supports by secondary-atom-doped *** the secondary doping,the density and coordination environment of active sites can be efficiently tuned,enabling the simultaneous improvement in the number and reactivity of the active ***,structure optimizations in terms of the enlarged surface area and improved hydrophilicity can be achieved *** to the beneficial microstructure and abundant highly active FeN_5 moieties resulting from the secondary doping,the resultant catalyst exhibits an admirable half-wave potential of 0.81 V versus 0.83 V for Pt/C and much better stability than Pt/C in acidic *** work would offer a general strategy for the design and preparation of highly active SACs for electrochemical energy devices.

关键词： Single-atom catalysts Fe-N-C catalysts Doping Porous nanostructures Oxygen reduction reaction

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

Tuning Atomically Dispersed Fe Sites in Metal–Organic Frameworks Boosts Peroxidase‑Like Activity for Sensitive Biosensing

引用

Nano-Micro Letters 2020年第12期12卷 392-403页

作者： Weiqing Xu Yikun Kang Lei Jiao Yu Wu Hongye Yan Jinli Li wenling gu Weiyu Song Chengzhou Zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079People’s Republic of China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249People’s Republic of China

Although nanozymes have been widely developed,accurate design of highly active sites at the atomic level to mimic the electronic and geometrical structure of enzymes and the exploration of underlying mechanisms still face significant ***,two functional groups with opposite electron modulation abilities(nitro and amino)were introduced into the metal–organic frameworks(MIL-101(Fe))to tune the atomically dispersed metal sites and thus regulate the enzymelike ***,the functionalization of nitro can enhance the peroxidase(POD)-like activity of MIL-101(Fe),while the amino is poles *** calculations demonstrate that the introduction of nitro can not only regulate the geometry of adsorbed intermediates but also improve the electronic structure of metal active *** from both geometric and electronic effects,the nitro-functionalized MIL-101(Fe)with a low reaction energy barrier for the HO*formation exhibits a superior POD-like *** a concept of the application,a nitro-functionalized MIL-101(Fe)-based biosensor was elaborately applied for the sensitive detection of acetylcholinesterase activity in the range of 0.2–50 mU mL−1 with a limit of detection of 0.14 mU mL−***,the detection of organophosphorus pesticides was also *** work not only opens up new prospects for the rational design of highly active nanozymes at the atomic scale but also enhances the performance of nanozyme-based biosensors.

关键词： Nanozymes Metal–organic frameworks Atomically dispersed sites Peroxidase-like activity Biosensors

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

Protein trap-engineered metal-organic frameworks for advanced enzyme encapsulation and mimicking

引用

Nano Research 2023年第2期16卷 3364-3371页

作者： Weiqing Xu Yu Wu Lei Jiao Meng Sha Xiaoli Cai Yating Wen Yifeng Chen wenling gu Chengzhou Zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of Chemistry Central China Normal UniversityWuhan 430079China

Immobilizing enzymes within metal-organic frameworks(MOFs)enables enzymes to against extreme ***,these MOF shells are just like armors,protective but heavy,which shield the enzymes from threats while locking them in the *** exploitation of immobilization strategy and intrinsic property of MOFs themselves is of great ***,we proposed a functional protein trap strategy for efficient enzyme *** ferrocenedicarboxylic acid(Fc)was used to induce the formation of defect-rich Co-based MOFs(CoBDC-Fc).As result,the engineered protein trap can not only improve the enzyme loading but also accelerate catalytic ***,the atomically dispersed Fc sites serve as cocatalysts/cofactors and even change the conformation of enzymes in the construed ***,the obtained CoBDC-Fc/enzyme exhibits excellent recyclability and tolerance to inhospitable *** by these,the CoBDC-Fc/enzyme/antigen composites were further prepared for cascade enzyme-linked immunosorbent assay of prostate-specific antigen with satisfactory sensitivity.

关键词： enzyme immobilization metal-organic frameworks biocatalysis nanozymes immunoassay

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

Atomically dispersed N-coordinated Fe-Fe dual-sites with enhanced enzyme-like activities

引用

Nano Research 2022年第2期15卷 959-964页

作者： Lei Jiao Wei Ye Yikun Kang Yu Zhang Weiqing Xu Yu Wu wenling gu Weiyu Song Yujie Xiong Chengzhou Zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China College of Material Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou 311121China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)School of Chemistry and Materials Scienceand National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China

Replacement of enzymes with nanomaterials such as atomically dispersed metal catalysts is one of the most crucial steps in addressing the challenges in *** the breakthroughs of single-atom catalysts in enzyme-mimicking,a fundamental investigation on the development of an instructional strategy is still required for mimicking biatomic/multiatomic active sites in natural enzymes and constructing synergistically enhanced metal atom active ***,Fe_(2)NC catalysts with atomically dispersed Fe-Fe dual-sites supported by the metal-organic frameworks-derived nitrogen-doped carbon are employed as biomimetic catalysts to perform proof-of-concept *** effect of Fe atom number toward typical oxidase(cytochrome C oxidase,NADH oxidase,and ascorbic acid oxidase)and peroxidase(NADH peroxidase and ascorbic acid peroxidase)activities is systematically evaluated by experimental and theoretical investigations.A peroxo-like O_(2) adsorption in Fe_(2)NC nanozymes could accelerate the O-O activation and thus achieve the enhanced enzyme-like *** work achieves the vivid simulation of the enzyme active sites and provides the theoretical basis for the design of high-performance *** a concept application,a colorimetric biosensor for the detection of S^(2-) in tap water is established based on the inhibition of enzyme-like activity of Fe_(2)NC nanozymes.

关键词： nanozymes atomically dispersed dual-metal sites oxidase-like activities single-atom catalysis sensors

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

Defect-rich and ultrathin nitrogen-doped carbon nanosheets with enhanced peroxidase-like activity for the detection of urease activity and fluoride ion

引用

Chinese Chemical Letters 2022年第3期33卷 1317-1320页

作者： Yu Zhang Lei Jiao Weiqing Xu Yifeng Chen Yu Wu Hongye Yan wenling gu Chengzhou Zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China

Although carbon nanozymes have attracted great interest due to their good biocompatibility, low cost,and high stability, designing high-active carbon nanozymes still faces great challenges. Herein, ultrathin nitrogen-doped carbon nanosheets with rich defects(d-NC) were prepared through a high-temperature annealing process, using potassium chloride and ammonium chloride as templates. Owing to the large specific surface area, rich defects and the high exposure of active sites, the proposed d-NC nanozymes exhibited excellent peroxidase-like activity. The d-NC nanozymes possess maximal reaction velocity and their specific activity is 9.4-fold higher than that of nitrogen-doped carbon nanozymes, indicating that the induced defects can boost the catalytic performance. Benefited from the good peroxidase-like activities of d-NC nanozymes, the colorimetric sensing platforms were constructed for the detection of urease activity and fluoride ion, exhibiting satisfactory stability and selectivity. This study not only offers a way to synthesize carbon nanozymes with improved enzyme-like activities but also broadens their applications in colorimetric biosensing.

关键词： Nanozymes Defects Nanosheets Carbon nanomaterials Biosensors

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

Fine-Tuning Pyridinic Nitrogen in Nitrogen-Doped Porous Carbon Nanostructures for Boosted Peroxidase-Like Activity and Sensitive Biosensing

引用

Research 2020年第1期2020卷 1510-1520页

作者： Hongye Yan Linzhe Wang Yifeng Chen Lei Jiao Yu Wu Weiqing Xu wenling gu Weiyu Song Dan Du Chengzhou Zhu Key Laboratory of Pesticide and Chemical Biology of Ministry of Education International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China School of Mechanical and Materials Engineering Washington State UniversityPullmanWashington 99164USA

Carbon materials have been widely used as nanozymes in bioapplications,attributing to their intrinsic enzyme-like ***(N)-doping has been explored as a promising way to improve the activity of carbon material-based nanozymes(CMNs).However,hindered by the intricate N dopants,the real active site of N-doped CMNs(N-CMNs)has been rarely investigated,which subsequently retards the further progress of high-performance ***,a series of porous N-CMNs with well-controlled N dopants were synthesized,of which the intrinsic peroxidase(POD)like activity has a positive correlation with the pyridinic N *** functional theory calculations also reveal that pyridinic N boosts the intrinsic POD-like activity of ***-N dopant can effectively promote the first H_(2)O desorption process in comparison with the graphitic and pyrrolic N,which is the key endothermic reaction during the catalytic ***,utilizing the optimized nanozymes with high pyridinic N content(NP-CMNs)and superior POD-like activity,a facile total antioxidant capacity(TAC)assay was developed,holding great promise in the quality assessment of medicine tablets and antioxidant food for healthcare and healthy diet.

关键词： process intrinsic utilizing

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

Metal atom doping-induced S-scheme heterojunction boosts the photoelectric response

引用

中国科学：化学英文版 2023年第4期66卷 1228-1236页

作者： Mingwang Liu Jing Wen Ying Qin Jinli Li Yinjun Tang Lei Jiao Yu Wu Qie Fang Lirong Zheng Xiaowen Cui wenling gu Chengzhou Zhu Liuyong Hu Shaojun guo National Key Laboratory of Green Pesticide International Joint Research Center for Intelligent Biosensing Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan 430079China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsWuhan Institute of TechnologyWuhan 430203China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China School of Materials Science and Engineering Peking UniversityBeijing 100871China

Carrier migration path and driving forces are two crucial factors for charge separation of heterojunction with efficient photoelectric response from the thermodynamic and kinetic perspectives,*** the S-scheme heterojunction and achieving an efficient migration path for space charge separation have aroused great interest,while a thorough insight into tuning interfacial band bending for S-scheme heterojunction is ***,we report a class of Zn atom-doped CeO_(2)/g-C_(3)N_(4) heterostructure for achieving a new carrier migration path conversion from inferior type-II to advanced ***-dependent volcano-type plot for Zn-CeO_(2) is established to tune the Fermi level of CeO_(2).The built-in electric field for carrier flow dynamics strengthens when coupling with g-C_(3)N_(4),which significantly boosts the photoelectric *** on the intrinsic enzymelike activity of Zn-CeO_(2),we further demonstrate that the Zn-CeO_(2)/g-C_(3)N_(4) S-scheme heterojunction can be explored for constructing a sensitive nanozymatic photoelectrochemical biosensor for the detection of acetylcholinesterase.

关键词： metal atom doping built-in electric field heterojunction conversion nanozymes photoelectrochemical sensing

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

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：