您当前所在位置: 首页 > 首发论文
筛选条件

时间

领域

全部

化学(20)

材料科学(4)

环境科学技术(4) 显示更多>>

化学工程(1) 能源科学技术(1) 中医学与中药学(0) 临床医学(0) 交通运输工程(0) 体育科学(0) 信息科学与系统科学(0) 农学(0) 冶金工程技术(0) 力学(0) 动力与电气工程(0) 图书馆、情报与文献学(0) 土木建筑工程(0) 地球科学(0) 基础医学(0) 天文学(0) 安全科学技术(0) 工程与技术科学基础学科(0) 心理学(0) 教育学(0) 数学(0) 机械工程(0) 林学(0) 核科学技术(0) 水产学(0) 水利工程(0) 测绘科学技术(0) 物理学(0) 生物学(0) 电子、通信与自动控制技术(0) 畜牧科学、动物医学(0) 矿山工程技术(0) 管理学(0) 纺织科学技术(0) 经济学(0) 航空航天科学技术(0) 药学(0) 计算机科学技术(0) 预防医学与卫生学(0) 食品科学技术(0)

学术评议

实时热搜榜

人工智能27290

SiC16980

基因14613

冠心病10184

数值模拟9906

我的筛选 >
2003-2021 全部
为您找到包含“Electrocatalysis”的内容共30

刘虹,韩非,王艳,王晓敏

2010-01-06

提高催化剂的电催化活性和抗CO中毒的能力是直接甲醇燃料电池(DMFC)催化剂性能研究的热点。在CVD法制备得到粒径均匀、分散度好的碳微球(Carbon Microspheres,以下简称CMS)的基础上,采用浸渍还原法,在乙二醇体系中制备出Pt-Sn/CMS复合材料,并通过扫描电子显微镜(SEM),X射线衍射(XRD),X射线光电子能谱(XPS),循环伏安对产物进行结构和性能的表征。结果表明:Pt-Sn/CMS复合材料中金属颗粒分布均匀,粒径大约为4nm,符合最佳催化要求。XRD和XPS测试表明Pt-Sn/CMS复合材料中有PtSn合金和SnO2形成。用循环伏安法比较发现Pt-Sn/CMS催化剂的电催化性能明显优于Pt/CMS。从结构上分析得出,PtSn合金和SnO2能够促进CO的氧化,从而抑制了Pt的CO中毒,提高了Pt-Sn/CMS催化剂的电催化活性。

国家自然科学基金(50772069

教育部优秀人才项目(NECT-08-0888

教育部重点项目(209018

太原理工大学材料科学与工程学院,太原理工大学材料科学与工程学院,太原理工大学材料科学与工程学院,太原理工大学材料科学与工程学院,教育部新材料界面与工程重点实验室

#材料科学#

0评论(0 分享(0)

王辉,卞兆勇,逄磊,鲁光

2011-10-24

以Ti/IrO2/RuO2电极为阳极、C/PTFE气体扩散电极为阴极,在以涤纶为隔膜的电解槽内研究了阴阳极同时作用电化学催化氧化降解水中苯酚的效果。系统地考察了电流密度(18-46mA/cm2)、电解质浓度(0.01-0.1mol/L)、pH (1.01-12.98)、初始苯酚浓度(100-300mg/L)、极间距(1-3cm)和曝气速度(0-2.53L/min)对苯酚去除率的影响。控制合适的反应条件,苯酚的去除率可达到100%。电解100min后,阴极室COD和TOC去除率分别为91.7%、84%,阳极室COD和TOC去除率分别为70.7%、68%。紫外扫描和GC/MS分析结果表明,在电解过程中阳极室降解产物主要是苯醌,而阴极室降解产物为一些小分子脂肪酸。苯酚的降解是在阳极的直接、间接氧化及阴极产生的H2O2、HO•和O2-•自由基的氧化共同作用下完成的。

高等学校博士学科点专项科研基金(200800221007

国家自然科学基金(20903012

中央高校基本科研业务费专项(YX-2010-32,HJ2010-6

北京市科技新星计划项目(2008B21

北京林业大学环境科学与工程学院,北京师范大学水科院,北京林业大学环境科学与工程学院,北京林业大学环境科学与工程学院

#环境科学技术#

0评论(0 分享(0)

吕广珍,吴俣,王煜

2020-03-06

设计具有高氧化还原反应(ORR)性能的Pt基催化剂对提高燃料电池的商业可行性具有重要意义。本文采用简单的湿化学法和两步退火法制备了一种海胆刺球豆荚状核-壳型的NiCo2@Pt/C复合催化剂,其中内部为NiCo2合金,外壳为Pt层,而NiCo2@Pt纳米粒子外部则由多孔碳膜包覆。这种独特的结构赋予了NiCo2@Pt/C催化剂许多优点,如多孔性、高导电性、丰富的活性位点和大的比表面积等。更重要的是,通过结合NiCo2核和Pt层之间的协同作用以及嵌入式结构的优势,NiCo2@Pt/C的ORR活性和耐久性远高于商业Pt/C。

The School of Chemistry and Chemical Engineering, Chongqing university, Chongqing 400044,The School of Chemistry and Chemical Engineering, Chongqing university, Chongqing 400044,The School of Chemistry and Chemical Engineering, Chongqing university, Chongqing 400044

#化学#

0评论(0 分享(0)

WANG Jianling,ZHAO Shuang

Hb-PDDA films were constructed by encapsulating hemoglobin (Hb) in PDDA matrix and modified on the glassy carbon electrode (GCE), where PDDA is a polycation poly(diallyldimethylammonium chloride), realizing the direct electrochemistry between Hb and the electrode surface without any nanomaterial. UV-Vis absorption testified Hb could still keep its native structure in Hb-PDDA films. The influence of the ethanol proportion to the electrochemistry of Hb-PDDA/GCE was investigated in PBS-ethanol mixtures by cyclic voltammetry (CV). CV of Hb-PDDA/GCE showed a pair of reversible and stable peaks at 0.350 and 0.412 V (vs. SCE) in PBS-ethanol solution (V:V/1:1, pH 7.0) at the scan rate of 100 mV/s, with a electron transfer rate constant 1.03 s1. Hb-PDDA/GCE also achieved the electrocatalytic reduction to H2O2 at 0.42 V (vs. SCE), with a smaller apparent Michaelis-Menten constant 0.496 mM and a lower detection limit 0.96 μM. Therefore, this method of fabricating chemically modified electrode takes on a significant potential in preparation of the third-generation biosensors.

2012-02-13

Specialized Research Fund for the Doctoral Program of Higher Education (200801451023

College of Sciences, Northeastern University, Shenyang 110004,College of Sciences, Northeastern University, Shenyang 110004

#Chemistry#

0评论(0 分享(6)

林建辉,马茹茹,王玄,杨琰,王翀

2015-05-22

通过采用表面平整的铜从溶液中置换银离子的方法,在铜表面原位生成银微晶。调节置换反应溶液的浓度、组成、反应时间等条件,分别得到了多孔银、细枝状银和粗枝状银三种不同形貌的银沉积层。采用XRD、SEM分别对银沉积层的结构和表面形貌进行了表征,并且采用电化学线性扫描伏安法、计时电流法等测试了三种不同形貌的银在碱性环境下对甲醛的电催化活性。电化学实验结果表明,粗枝状银的电化学活性以及在碱性条件下的稳定性都是最好的。

中央高校基本科研业务费(2672012ZYGX2013J045

电子科技大学微电子与固体电子学院,电子薄膜与集成器件国家重点实验室,成都 610054,电子科技大学微电子与固体电子学院,电子薄膜与集成器件国家重点实验室,成都 610054,电子科技大学微电子与固体电子学院,电子薄膜与集成器件国家重点实验室,成都 610054,电子科技大学微电子与固体电子学院,电子薄膜与集成器件国家重点实验室,成都 610054,电子科技大学微电子与固体电子学院,电子薄膜与集成器件国家重点实验室,成都 610054

#化学#

0评论(0 分享(0)

WANG Jianling,ZHAO Shuang

Hemoglobin (Hb) modified with mercaptopropionic acid-stabilized CdTe quantum dots (QDs) was immobilized on a glassy carbon electrode (GCE) by chitosan (CS). QDs could accelerate the electron transfer between Hb and the electrode, as well as its catalytic ability toward nitrite (NO2). The modified electrode displayed a couple of stable and well-defined redox peaks in aqueous-ethanol mixtures. UV-Vis spectroscopy analysis showed that the modified Hb could keep its natural structure. The modified electrode showed an electrocatalytic activity to the reduction of NO2 without the aid of an electron mediator. The electrocatalytic response showed a linear dependence on the NO2 concentration ranging from 7.5 to 120.0 μM with a fairly low detection limit of 2.5 μM (S/N = 3).

2012-02-07

Specialized Research Fund for the Doctoral Program of Higher Education (200801451023)

the Fundamental Research Funds for the Central Universities (N100405007

College of Sciences, Northeastern University, Shenyang 110004,College of Sciences, Northeastern University, Shenyang 110004

#Chemistry#

0评论(0 分享(0)

Ye Liqiang,Li Zhoupeng

potential sweep and EIS confirm that the cell performance is determined by the anode electrocatalysis

2010-06-12

National Natural Science Foundation (No.20976156

863 program grant (No.2007AA05Z144

Doctoral foundation (No.20070335003

Department of Chemical Engineering & Biochemical Engineering, Zhejiang University,Department of Chemical Engineering & Biochemical Engineering, Zhejiang University

#Chemical Engineering#

0评论(0 分享(0)

YAN Huixiang,GONG Lingshan,ZHANG Shupei,LI Yilin,ZHANG Qingrong,XU Guifang,DAI Hong

capabilities and specifically the corresponding sensing interface layer showed obvious electrocatalysis towards

2014-12-11

Education Department of Fujian Province(JA14071

National Science Foundation of Fujian Province( JB14036

Foundation of Fuzhou Science and Technology Bureau( JA13068

NSFC (2011J05020

Fujian Normal University outstanding young teacher research fund projects(2013-S-113

College of Chemistry and Chemicial Engineering, Fujian Normal University ,Fuzhou ,Fujian,350007,College of Chemistry and Chemicial Engineering, Fujian Normal University ,Fuzhou ,Fujian,350007,College of Chemistry and Chemicial Engineering, Fujian Normal University ,Fuzhou ,Fujian,350007,College of Chemistry and Chemicial Engineering, Fujian Normal University ,Fuzhou ,Fujian,350007,College of Chemistry and Chemicial Engineering, Fujian Normal University ,Fuzhou ,Fujian,350007,College of Chemistry and Chemicial Engineering, Fujian Normal University ,Fuzhou ,Fujian,350007,College of Chemistry and Chemicial Engineering, Fujian Normal University ,Fuzhou ,Fujian,350007

#Chemistry#

0评论(0 分享(0)

许鹏富,王茹玥,黄凯,张茹,雷鸣

2020-05-15

氧还原反应(ORR)催化剂是开发高效燃料电池和金属空气电池的关键部件。负载型PtCo合金纳米颗粒(NPs)因其配体、应变和/或整体效应而具有良好的表面性质和反应活性,被认为是很有前途的、廉价的低铂催化剂的候选材料。在此,我们报告了一种负载在氮掺杂介孔碳上的PtCo合金纳米颗粒(PtCo@NMC)的无退火制备方案,该催化剂用于碱性和酸性电解质中的ORR电催化。与工业Pt/C催化剂相比,PtCo@NMC催化剂的半波电位(E1/2)增加到了0.93~0.94 V (Vs. RHE),正向偏移了大约45 mV。此外,退火引起的性能降低是由合金NPs的团聚和生长引起的。我们还通过计时安培法(CA)和加速耐久性试验(ADTs)证明了该催化剂优异的长期耐久性。最后,我们演示了该催化剂在电化学能量装置中的实际应用,例如用PtCo@NMC作为阴极组装的一次锌空气电池(ZABs)。

School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876,School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876,School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876,School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876,School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876

#能源科学技术#

0评论(0 分享(0)

XIAO Shenghuan,YANG Yang,ZHANG Yunhuai

attention in the filed of electrocatalysis because of unique framework structure and adjustable components.

2020-05-25

College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331;College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331;College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331,,

#Chemistry#

0评论(0 分享(0)