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Inner Co Synergizing Outer Ru Supported on Carbon Nanotubes for Efficient pH-Universal Hydrogen Evolution Catalysis

Nano-Micro Letters 2022年第11期14卷 275-289页

作者： Jian Chen Yuan Ha Ruirui Wang Yanxia Liu Hongbin Xu Bin Shang renbing wu Hongge Pan Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021People’s Republic of China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710126People’s Republic of China Department of Materials Science Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430073People’s Republic of China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China

Exploring highly active but inexpensive electrocatalysts for the hydrogen evolution reaction(HER)is of critical importance for hydrogen production from electrochemical water splitting.Herein,we report a multicomponent catalyst with exceptional activity and durability for HER,in which cobalt nanoparticles were in-situ confined inside bamboo-like carbon nanotubes(CNTs)while ultralow ruthenium loading(~2.6μg per electrode area~cm^(−2))is uniformly deposited on their exterior walls(Co@CNTsǀRu).The atomic-scale structural investigations and theoretical calculations indicate that the confined inner Co and loaded outer Ru would induce charge redistribution and a synergistic electron coupling,not only optimizing the adsorption energy of H intermediates(ΔGH*)but also facilitating the electron/mass transfer.The as-developed Co@CNTsǀRu composite catalyst requires overpotentials of only 10,32,and 63 mV to afford a current density of 10 mA cm^(−2) in alkaline,acidic and neutral media,respectively,representing top-level catalytic activity among all reported HER catalysts.The current work may open a new insight into the rational design of carbon-supported metal catalysts for practical applications.

关键词： Cobalt nanoparticles Carbon nanotubes Ru nanoclusters Hydrogen evolution reaction

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Heterostructured bimetallic phosphide nanowire arrays with latticetorsion interfaces for efficient overall water splitting

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Journal of Energy Chemistry 2023年第2期77卷 420-427,I0011页

作者： Hua Zhang Hongyi Li Yintang Zhou Fang Tan Ruijie Dai Xijun Liu Guangzhi Hu Laiming Jiang Anran Chen renbing wu School of Materials and Energy Institute for Ecological Research and Pollution Control of Plateau LakesSchool of Ecology and Environmental ScienceYunnan UniversityKunming 650091YunnanChina Department of Materials Science Fudan UniversityShanghai 200433China Guangzhou Panyu Polytechnic Guangzhou 511483GuangdongChina National Engineering Research Center for Marine Aquaculture Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316004ZhejiangChina MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004GuangxiChina Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065SichuanChina

Designing cost-effective and high-efficiency electrocatalysts is critical to the water splitting performance during hydrogen generation.Herein,we have developed Fe_(2)P-Co_(2)P heterostructure nanowire arrays with excellent lattice torsions and grain boundaries for highly efficient water splitting.According to the microstructural investigations and theoretical calculations,the lattice torsion interface not only contributes to the exposure of more active sites but also effectively tunes the adsorption energy of hydrogen/oxygen intermediates via the accumulation of charge redistribution.As a result,the Fe_(2)P-Co_(2)P heterostructure nanowire array exhibits exceptional bifunctional catalytic activity with overpotentials of 65 and 198 mV at 10 mA cm^(-2) for hydrogen and oxygen evolution reactions,respectively.Moreover,the Fe_(2)P-Co_(2)P/NF-assembled electrolyzer can deliver 10 mA cm^(-2) at an ultralow voltage of1.51 V while resulting in a high solar-to-hydrogen conversion efficiency of 19.8%in the solar-driven water electrolysis cell.

关键词： Transition metal phosphide Lattice torsion Heterogeneous interfaces Water splitting Theoretical calculation

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Rational construction of graphene oxide with MOF- derived porous NiFe@C nanocubes for high-performance microwave attenuation

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Nano Research 2016年第12期9卷 3671-3682页

作者： Zhihong Yang Hualiang Lv renbing wu College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 China Department of Materials Science Fudan University Shanghai 200433 China

Exploring lightweight microwave attenuation materials with strong and tunable wideband microwave absorption is highly desirable but remains a significant challenge. Herein, three-dimensional （3D） porous hybrid composites consisting of NiFe nanoparticles embedded within carbon nanocubes decorated on graphene oxide （GO） sheets （NiFe@C nanocubes@GO） as high-performance microwave attenuation materials have been rationally synthesized. The 3D porous hybrid composites are fabricated by a simple method, which involves one-step pyrolysis of NiFe Prussian blue analogue nanocubes in the presence of GO sheets. Benefiting from the unique structural features that exhibit good magnetic and dielectric losses as well as a proper impedance match, the resulting NiFe@C nanocubes@GO composites show excellent microwave attenuation ability. With a minimum reflection loss （RL） of -51 dB at 7.7 GHz at a thickness of 2.8 mm and maximum percentage bandwidth of 38.6% for RL 〈 -10 dB at a thickness of 2.2 mm, the NiFe@C nanocubes@GO composites are superior to the previously reported state-of-the-art carbon-based microwave attenuation materials.

关键词： hybrid dielectric loss magnetic loss microwave attenuation

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In-situ growth of Ni nanoparticle-encapsulated N-doped carbon nanotubes on carbon nanorods for efficient hydrogen evolution electrocatalysis

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Nano Research 2020年第4期13卷 975-982页

作者： Xiaoxiao Yan Minyi Gu Yao Wang Lin Xu Yawen Tang renbing wu Department of Materials Science Fudan UniversityShanghai 200433China Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China

Searching for inexpensive,efficient and durable electrocatalysts with earth-abundant elements toward the hydrogen evolution reaction(HER)is of vital importance for the future sustainable hydrogen economy,yet still remains a formidable challenge.Herein,a facile template-engaged strategy is demonstrated for the direct in-situ growth of Ni nanoparticles and N-doped carbon nanotubes on carbon nanorod substrates,forming a hierarchically branched architecture(abbreviated as Ni@N-C NT/NRs hereafter).The elaborate construction of such unique hierarchical structure with tightly encapsulated Ni nanoparticles and open configuration endows the as-fabricated Ni@N-C NT/NRs with abundant well-dispersed active sites,enlarged surface area,reduced resistances of charge transfer and mass diffusion,and reinforced mechanical robustness.As a consequence,the optimal Ni@N-C NT/NR catalyst demonstrates superior electrocatalytic activity with relatively low overpotential of 134 mV to deliver a current density of 10 mA·cm^-2 and excellent stability for HER in 0.1 M KOH,holding a great promise for practical scalable H2 production.More importantly,this work offers a reliable methodology for feasible fabrication of robust high-performance carbon-based hierarchical architectures for a variety of electrochemical applications.

关键词： hydrogen evolution reaction nitrogen-doped carbon nanotubes Ni nanoparticles carbon nanorods hierarchically branched structure

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Porous Carbon Architecture Assembled by Cross-Linked Carbon Leaves with Implanted Atomic Cobalt for High-Performance Li-S Batteries

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Nano-Micro Letters 2021年第10期13卷 98-112页

作者： Ruirui Wang renbing wu Chaofan Ding Ziliang Chen Hongbin Xu Yongfeng Liu Jichao Zhang Yuan Ha Ben Fei Hongge Pan Department of Materials Science Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China Shanghai Synchrotron Radiation Facility Zhangjiang LaboratoryShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204People’s Republic of China Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021People’s Republic of China

The practical application of lithium-sulfur batteries is severely hampered by the poor conductivity,polysulfide shuttle effect and sluggish reaction kinetics of sulfur cathodes.Herein,a hierarchi-cally porous three-dimension(3D)carbon architecture assembled by cross-linked carbon leaves with implanted atomic Co-N4 has been deli-cately developed as an advanced sulfur host through a SiO_(2)-mediated zeolitic imidazolate framework-L(ZIF-L)strategy.The unique 3D architectures not only provide a highly conductive network for fast electron transfer and buffer the volume change upon lithiation-delithi-ation process but also endow rich interface with full exposure of Co-N4 active sites to boost the lithium polysulfides adsorption and conversion.Owing to the accelerated kinetics and suppressed shuttle effect,the as-prepared sulfur cathode exhibits a superior electrochemical perfor-mance with a high reversible specific capacity of 695 mAh g^(−1) at 5 C and a low capacity fading rate of 0.053%per cycle over 500 cycles at 1 C.This work may provide a promising solution for the design of an advanced sulfur-based cathode toward high-performance Li-S batteries.

关键词： Single-atom Co 3D porous carbon architecture Cathode Lithium–sulfur battery

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Embedding ZnSe nanodots in nitrogen-doped hollow carbon architectures for superior lithium storage

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Nano Research 2018年第2期11卷 966-978页

作者： Ziliang Chen renbing wu Hao Wang Kelvin H. L. Zhang Yun Song Feilong wu Fang Fang Dalin Sun Department of Materials Science Fudan University Shanghai China College of Chemistry and Chemical Engineering Xiamen University Xiamen China

Transition metal chalcogenides represent a class of the most promising alternative electrode materials for high-performance lithium-ion batteries （LIBs） owing to their high theoretical capacities. However, they suffer from large volume expansion, particle agglomeration, and low conductivity during charge/discharge processes, leading to unsatisfactory energy storage performance. In order to address these issues, we rationally designed three-dimensional （3D） hybrid composites consisting of ZnSe nanodots uniformly confined within a N-doped porous carbon network （ZnSe ND@N-PC） obtained via a convenient pyrolysis process. When used as anodes for LIBs, the composites exhibited outstanding electrochemical performance, with a high reversible capacity （1,134 mA.h.g-1 at a current density of 600 mA.g-1 after 500 cycles） and excellent rate capability （696 and 474 mA.h.g-1 at current densities of 6.4 and 12.8 A.g-1, respectively）. The significantly improved lithium storage performance can be attributed to the 3D architecture of the hybrid composites, which not only mitigated the internal mechanical stress induced by the volume change and formed a 3D conductive network during cycling, but also provided a large reactive area and reduced the lithium diffusion distance. The strategy reported here may open a new avenue for the design of other multi functional composites towards high-performance energy storage devices.

关键词： hollow hybrid composite,ZnSe nanodot,porous carbon network,lithium-ion batteries

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儿童膝关节周围骨肉瘤灭活再植与假体置换的短期疗效对比

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实用骨科杂志 2024年第6期30卷 502-507页

作者：宋宁张强杜俊炜武峻申戴志兵江仁兵新疆医科大学附属肿瘤医院骨与软组织肿瘤及黑色素瘤科新疆乌鲁木齐830011

目的探讨儿童膝关节周围骨肉瘤瘤段灭活再植术与全膝关节肿瘤假体置换术的短期疗效差异。方法回顾性分析2019年1月至2022年1月就诊于新疆医科大学附属肿瘤医院骨与软组织肿瘤及黑色素瘤科,行保留骨骺的瘤段灭活再植术和全膝关节肿瘤假... 详细信息

目的探讨儿童膝关节周围骨肉瘤瘤段灭活再植术与全膝关节肿瘤假体置换术的短期疗效差异。方法回顾性分析2019年1月至2022年1月就诊于新疆医科大学附属肿瘤医院骨与软组织肿瘤及黑色素瘤科,行保留骨骺的瘤段灭活再植术和全膝关节肿瘤假体置换术的膝关节周围骨肉瘤26例患者的临床资料,男13例,女13例;年龄8~16岁,平均(11.88±2.42)岁。其中采用瘤段灭活再植手术8例(股骨5例,胫骨3例),为灭活再植组;采用全膝关节肿瘤假体置换手术方式共18例(股骨9例,胫骨9例),为假体置换组。比较两组患者一般临床资料,功能评估采用肌肉骨骼肿瘤协会评分(musculoskeletal tumor society,MSTS),使用膝关节活动度评分(range of motion,ROM)评估膝关节活动范围,术后定期复查X线片评估双下肢长度差异,进行肿瘤学评估以及并发症评估等。结果26例膝关节周围骨肉瘤患者,随访20~56个月,平均(29.50±6.46)个月。灭活再植组中双下肢长度差异0.63~1.75 cm,平均(1.03±0.37)cm;假体置换组中双下肢长度差异0.73~4.00 cm,平均(1.96±0.88)cm,两组比较差异有统计学意义(t=2.86,P=0.009)。MSTS评分灭活再植组平均为(26.63±1.51)分,假体置换组平均为(24.50±1.89)分,两组MSTS评分比较,差异有统计学意义(t=2.81,P=0.01)。瘤段灭活再植组中末次随访膝关节屈曲角度平均为健侧的(62.13±13.78)%;全膝关节肿瘤假体置换组末次随访膝关节屈曲角度平均为健侧的(65.68±10.40)%,两组患者膝关节屈曲角度比较,差异无统计学意义(χ2=1.25,P=0.26)。结论儿童膝关节周围骨肉瘤瘤段灭活再植保留骨骺能够有效保留患肢的生长发育潜能,改善患者关节功能,植骨融合较好,并发症较少,短期随访具有较好的临床疗效。

关键词：骨肉瘤骨骺液氮灭活自体骨关节功能

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膜联蛋白A1拟肽Ac2-26减轻大鼠体外循环肺损伤的抗炎机制

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中华胸心血管外科杂志 2022年第9期38卷 543-547页

作者：刘科宇吴汉华郭宇含罗俊丽张红田仁斌遵义医科大学附属医院麻醉科遵义563000 遵义医科大学附属医院心脏大血管外科遵义563000

目的探讨膜联蛋白A1(AnxAl)拟肽Ac2-26对体外循环(CPB)大鼠肺损伤的影响,分析其抗炎机制。方法18只雄性SD大鼠,体质量350~450 g。随机数字表法分为3组(各6例):假手术组(S组)、缺血再灌注组(IR组)、Ac2-26组(A组)。假手术组行股动静脉穿... 详细信息

目的探讨膜联蛋白A1(AnxAl)拟肽Ac2-26对体外循环(CPB)大鼠肺损伤的影响,分析其抗炎机制。方法18只雄性SD大鼠,体质量350~450 g。随机数字表法分为3组(各6例):假手术组(S组)、缺血再灌注组(IR组)、Ac2-26组(A组)。假手术组行股动静脉穿刺置管,仅开胸暴露左肺,不连接CPB管道;其余2组均建立CPB左肺缺血再灌注损伤模型,IR组在CPB前10 min给予同等容量的生理盐水;A组在CPB前10 min尾静脉注射Ac2-26(1 mg/kg)。3组大鼠于CPB前(T1)、开放左肺门即刻(T2)、实验结束时(T3)分别取动脉血,行血气分析,计算氧合指数(OI)和呼吸指数(RI)。于T1、T3分别取股静脉血测中性粒细胞(PMN)的数量。T3时取肺动脉血测PMN的数量、大鼠血管细胞黏附分子-1(VCAM-1)含量;取左肺组织,ELISA法测肺组织中髓过氧化物酶(MPO)和PMN弹性蛋白酶(NE)含量,Tunel法测肺组织中性粒细胞凋亡;Western-Blot测肺组织细胞间黏附分子-1(ICAM-1)和AnxAl蛋白表达情况。结果与S组比较,IR组T3时点的股静脉血、肺动脉血PMN数量及肺动脉VCAM-1含量高,肺组织MPO、NE含量增加,肺组织病理损伤评分升高、OI降低、RI升高,差异均有统计学意义(P<0.05)。与IR组比较,A组大鼠肺组织病理损伤评分明显降低,股静脉血、肺动脉血PMN数量及肺动脉血VCAM-1含量明显减少,肺组织AnxA1、ICAM-1表达降低,肺组织MPO、NE含量降低,PMN凋亡率升高,差异均有统计学意义(P<0.05)。结论膜联蛋白A1拟肽Ac2-26可抑制肺内中性粒细胞聚集,减弱中性粒细胞与肺血管内皮的黏附能力,促进肺内中性粒细胞凋亡,降低NE、MPO含量,对大鼠CPB后肺损伤有保护作用。

关键词：膜联蛋白A1拟肽Ac2-26 体外循环肺缺血再灌注损伤中性粒细胞

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基于磁过滤沉积技术TiAlCr基多元结构调控及性能

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中国表面工程 2022年第6期35卷 150-160页

作者：吴帅赵艺蔓刘爽陈淑年覃礼钊廖斌陈琳张旭张同华王可平赵仁兵西南大学材料与能源学院重庆400715 北京师范大学射线束技术教育部重点实验室北京100875 金猫纺织器材有限公司重庆400715

科技发展使军用、船舶、切削等各领域的精密器件所面临的环境更加极端复杂,多元防护涂层因具有良好的综合性能而逐渐取代传统的二三元氮化物,但目前关于TiAlCr基多元涂层结构与性能的影响研究尚未报道。通过调控氮气流量(5≤F_(N)≤40 m... 详细信息

科技发展使军用、船舶、切削等各领域的精密器件所面临的环境更加极端复杂,多元防护涂层因具有良好的综合性能而逐渐取代传统的二三元氮化物,但目前关于TiAlCr基多元涂层结构与性能的影响研究尚未报道。通过调控氮气流量(5≤F_(N)≤40 mL/min),基于磁过滤阴极真空弧(FCVA)技术制备TiAlCr基的多元(TiAlCrSi)N涂层。采用FESEM、EDS、.XRD、XPS和TEM对涂层的相结构、形貌和成分进行表征,并通过纳米压痕仪、划痕仪和电化学工作站对涂层性能进行表征。结果表明:随着氮气流量增加,涂层由无序致密的非晶相转变为具有柱状晶的(TiAlCr)N纳米晶1 SizN4非晶相的复合结构。FN≤20 mL/min时,涂层结构以均匀致密的非晶相为主;FN=20 mL/min时,涂层的结合强度Lc3(27.1 N)较高,在3.5 wt.%NaCl溶液中拥有较好的耐腐蚀性能(E_(corr)=-0.314 V,I_(corr)=2.9038μA·cm^(-2));FN≥30 mL/min时,涂层结构转变为具有柱状晶的(TiAlCr)N纳米晶/Si_(2)N_(4)非晶相复合结构,涂层的硬度得到显著提升,达到超硬级别;F_(N)=40 mL/min时,涂层拥有良好的力学性能,硬度、弹性模量、H/E和H^(3)/E^(2)分别为45.11.460.4、0.098和0.433 GPa。通过FCVA制备的(TiAlCrSi)N涂层具有优异的耐腐蚀和力学性能,可为表面防护技术在复杂苛刻环境中的发展提供参考。

关键词：磁过滤真空阴极弧复合结构超硬涂层耐腐蚀性

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黄连解毒汤有效部位对神经细胞内钙超载的作用及机制分析

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中国中药杂志 2010年第16期35卷 2166-2170页

作者：吴彦孙建宁石任兵张爱林广西中烟工业有限责任公司技术中心广西南宁530001 北京中医药大学中药学院北京100102

目的:研究黄连解毒汤有效部位(HLJDTAF)对神经细胞内钙超载的影响及相关机制。方法:低糖低氧损伤胎鼠皮层神经细胞模拟脑缺血,双波长荧光分光光度法测定神经细胞内钙含量,观察HLJDTAF对细胞内钙超载的抑制作用。并分别采用谷氨酸(Glu),K... 详细信息

目的:研究黄连解毒汤有效部位(HLJDTAF)对神经细胞内钙超载的影响及相关机制。方法:低糖低氧损伤胎鼠皮层神经细胞模拟脑缺血,双波长荧光分光光度法测定神经细胞内钙含量,观察HLJDTAF对细胞内钙超载的抑制作用。并分别采用谷氨酸(Glu),KCl,A23187,乙酰甲胆碱(MCh)和咖啡因(CAF)处理神经细胞,以分析药物的作用环节。结果:HLJD-TAF对低糖低氧处理所致神经细胞钙超载有明显的抑制作用(P<0.05);对200μmol.L-1谷氨酸,50 mmol.L-1剂量的K+,0.05μmol.L-1钙离子载体A23187处理细胞引起神经细胞内钙超载有明显的抑制作用(P<0.05,P<0.01);正常外钙情况下和零外钙情况下,HLJDTAF对5 mmol.L-1CAF和Mch诱导神经细胞内钙超载有明显的抑制作用(P<0.01,P<0.05)。结论:HLJDTAF可显著抑制神经细胞拟缺血损伤后的钙超载,其机制可能是通过多途径抑制缺血缺氧后神经细胞内钙超载,从而拮抗脑缺血损伤。

关键词：黄连解毒汤有效部位脑缺血钙超载神经细胞

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