المؤلفون: CAIJing(蔡靖), LIUSiyi(刘思懿), WUYuanyuan(吴媛媛), ZHENGZiling(郑紫凌), WANGRuyi(王如意), LIQiangbiao(李强标)

المصدر: Zhejiang Daxue xuebao. Lixue ban, Vol 49, Iss 1, Pp 105-111 (2022)

مصطلحات موضوعية: 同步脱氮除硫, 微生物燃料电池, 电化学特性, 循环伏安法, 电化学阻抗谱, Electronic computers. Computer science, QA75.5-76.95, Physics, QC1-999

الوصف: 同步脱氮除硫工艺以硝态氮作为电子受体，硫化物作为电子供体，通过以废治废，去除氮硫污染物。本文构建了双室型微生物燃料电池（microbial fuel cell，MFC），将同步脱氮除硫工艺与MFC相结合，在处理废水的同时生产电能。与化学对照组相比，该同步脱氮除硫MFC具有高基质去除性能和产电性能。当进水硝态氮和硫化物的浓度分别为95.54和540 mg·L-1，反应时间为20 h时，硝态氮和硫化物的去除率分别高达96.50%和99.64%；最大电流密度达457.20 mA·m-2，稳定电流密度为30.33 mA·m-2。通过循环伏安法、极化曲线法和电化学阻抗分析，探究了同步脱氮除硫MFC的电化学特性。结果表明，在同步脱氮除硫MFC电极上，同步发生了脱氮除硫反应，该MFC最大功率密度为75.70 mW·m-3，内阻约为2 474 Ω，其对同步脱氮除硫MFC电化学性能具有制约作用。

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/1008-9497Test

الوصول الحر: https://doaj.org/article/d6f0c29049294a7ba4a38c2f61801d89Test

المؤلفون: 凌云, 汤儆, 刘国坤, 宗铖

مصطلحات موضوعية: 暂态电化学-表面增强拉曼光谱, 时间分辨表面增强拉曼光谱, 循环伏安法, 计时电流法, 对硝基苯硫酚

الوصف: 对硝基苯硫酚是表面增强拉曼光谱研究中最常用的探针分子之一,对硝基苯硫酚在电极表面电化学还原反应的研究有助于对芳香族硝基化合物还原机理的认识.本文应用暂态电化学-表面增强拉曼光谱技术,研究了对硝基苯硫酚在循环伏安和计时电流法过程中的表面增强拉曼光谱.结果表明,实验实现了完全与电化学检测时间分辨率同步的表面增强拉曼光谱检测,以最快5毫秒的时间分辨率研究了对硝基苯硫酚分子在金电极表面的还原过程.结果分析推测其此反应过程极快,在5毫秒的时间分辨率下仍难以捕获其中间物种.本研究为人们更深层次研究和认识硝基苯类化合物电化学还原过程提供了参考和方向.

العلاقة: 电化学,2019,(06); https://dspace.xmu.edu.cn/handle/2288/177218Test

الإتاحة: https://doi.org/10.13208/j.electrochem.190709Test
https://dspace.xmu.edu.cn/handle/2288/177218Test

المؤلفون: 李明雪, 史杭, 刘佳, 张檬, 周剑章, 吴德印, 田中群

مصطلحات موضوعية: 偶氮腺嘌呤, 表面吸附量, 循环伏安法, 金电极, 电极动力学

الوصف: 本文研究了光滑金电极上偶氮腺嘌呤的电化学特性,并确定了相关动力学参数.在含偶氮腺嘌呤的0.2mol·L-1的磷酸盐缓冲液（PBS,pH=4.0～10.0）中,发现其循环伏安图上出现一对氧化还原峰.基于对扫速和伏安峰值电位的分析,结果表明这是一个由吸附控制的可逆偶氮腺嘌呤氧化还原电化学过程.当pH值从低到高改变时,氧化还原峰值向负电位移动,证实H+参与了该反应.通过进一步实验数据分析和电极表面吸附量计算,发现该反应为分步进行的两电子两质子反应.最后,通过快速循环伏安扫描方法确定了电化学过程的表观传递系数α和表观速率常数ks.

العلاقة: 电化学,2019,(06); https://dspace.xmu.edu.cn/handle/2288/176867Test

الإتاحة: https://doi.org/10.13208/j.electrochem.180401Test
https://dspace.xmu.edu.cn/handle/2288/176867Test

المؤلفون: 张杰, 陈煅, 郭佳瑶, 詹东平

مصطلحات موضوعية: COMSOL Multiphysics, 循环伏安法, 电极过程动力学, 电化学

الوصف: 以循环伏安法为例,介绍了如何通过COMSOL Multiphysics有限元软件建立电化学反应模型及其数值求解。通过改变电极尺寸、电子转移速率常数、均相化学反应速率常数等参数,实现了循环伏安图与扩散层内反应物浓度分布的关联和动态演示,帮助初学者形象深刻地理解循环伏安法的基本原理。 ; 国家自然科学基金项目(51605404)湖南省自然科学基金项目(2018JJ3142)湖南省大学生研究性学习和创新性实验计划项目(201710534030)湖南省普通高等学校教学改革研究项目(物理化学课程教学模式的探索研究与实践)

العلاقة: 化学教育(中英文),2019,40(20):75-79; https://dspace.xmu.edu.cn/handle/2288/176788Test

الإتاحة: https://doi.org/10.13884/j.1003-3807hxjy.2018120017Test
https://dspace.xmu.edu.cn/handle/2288/176788Test

المؤلفون: 董鹏飞, 李娜, 赵海燕, 崔敏, 张聪, 任聚杰, 藉雪平, DONG Peng-fei, LI Na, ZHAO Hai-yan, CUI Min, ZHANG Cong, REN Ju-jie, JI Xue-ping

المصدر: http://electrochem.xmu.edu.cn/CN/abstract/abstract10467.shtmlTest.

مصطلحات موضوعية: 多酸, 多巴胺, 电化学传感器, 碳糊电极, 循环伏安法, polyoxometalates, dopamine, electrochemical sensors, carbon paste electrode, cyclic voltammetry

الوصف: 多金属氧酸盐作为一类阴离子簇合物，由于其结构的多样性和尺寸大小的可调变性，在电化学、催化和药学等领域引起了人们的广泛关注.本文制备了多酸Co(C15N6H12)2[PW12O38]·5H2O（Co[PW12O38]）修饰碳糊电极并通过电化学阻抗谱、循环伏安法以及差分脉冲伏安法对多巴胺的传感性能进行了研究.对其制备条件和检测条件分别进行了优化.在优化条件下，制备的传感器对多巴胺具有良好的选择性和灵敏度的检测能力.多巴胺的线性响应范围为8.0x10-6 mol·L-1至3x10-5 mol·L-1，灵敏度为0.039 μA·(μmol·L-1)-1，检出限（S/N=3）为5.4 x10-6 mol·L-1. 制备的多酸修饰碳糊电极用于检测多巴胺表现出良好的稳定性和重现性，并且对抗坏血酸、尿酸等常见的干扰物质，具有良好的抗干扰性. 多酸修饰的碳糊电极制备过程简单方便，成本低,传感性能良好，对应用于电化学传感器检测多巴胺具备潜在的应用前景. ; Polyoxometalates, a class of anionic clusters with structure diversity and size variability, make them very attractive in many fields such as electrochemistry, catalysis and medicine. TheCo(C15N6H12)2[PW12O38]·5H2O（Co[PW12O38]） modified carbon paste electrode was prepared in this work, and its electrochemical performances as the sensor for dopamine detection were characterized with electrochemical impedance spectroscopy, cyclic voltammetry and differential pulse voltammetry. The preparation conditions and test conditions were optimized respectively. Under the optimized conditions, the POMs modified carbon paste electrode exhibited good selectivity and sensitivity in dopamine detection. The linear response range was from 8.0 × 10-6 mol·L-1 to 3 × 10-5 mol·L-1, and the sensitivity was 0.039 μA·(μmol·L-1)-1 with the detection limit of 5.4 × 10-6 mol·L-1 (S/N=3). The POMs modified carbon paste electrode used for the dopamine sensing showed good stability, repeatability and anti-interference under the coexistence of ascorbic acid, uric acid and so on. The preparation process was simple, convenient, and low cost, and the electrode obtained had good sensing performance, thus, the present POMs modified electrode demonstrated a promising application for the detection of dopamine. ; 河北省高等学校科学技术研究项目(No. ZC2016069)、河北科技大学博士启动基金(No. 81/1181222)、河北省研究生创新资助项目(No. CXZZSS2018088)、大学生创新创业训练计划项目(No. 2018065)、河北省高等学校科学技术研究项目(No.ZD2018037)、国家自然科学基金（No. 81872669）和河北省高等学校科学技术研究项目（No. 2C2016007，No. 22017107）资助 ; 作者联系地址：河北科技大学理学院, 河北 石家庄 050018 ; Author's Address: College of Science, Hebei University of Science and ...

العلاقة: 电化学获奖人优秀论文专辑; Special Issue for the Best Papers of the Award Winners in Electrochemistry; 电化学,2018,24(05):555-562.; http://dx.doi.org/10.13208/j.electrochem.180405Test; https://dspace.xmu.edu.cn/handle/2288/171088Test

الإتاحة: https://doi.org/10.13208/j.electrochem.180405Test
https://dspace.xmu.edu.cn/handle/2288/171088Test

المؤلفون: 施祖进, 贺晓然, 孙宝云, 廉永福, 顾镇南

المساهمون: 北京大学分析测试中心

المصدر: 知网

مصطلحات موضوعية: MALD-TOF质谱, 富勒烯, 电子结构, 电弧法, 化学还原法, 柱色谱法, 极性溶剂, 微分脉冲伏安法, 单原子, 循环伏安法

الوصف: 内嵌金属富勒烯(Endohedral Metallofullerene,EMF)由于其独特的几何电子结构和预期的重要性质,已成为富勒烯研究的重要领域之一。然而,EMF的合成产率低,分离困难,一直是进一步研究的障碍。MALDI-TOF质谱分析速度快、纯度高,可以提供正负离子质谱,为正确判断样品中含量提供重要依据,因此,它是EMF分析的重要手段,在EMF的研究中发挥了重要作用。 ; 1

العلاقة: 1411717; http://hdl.handle.net/20.500.11897/445783Test

الإتاحة: https://doi.org/20.500.11897/445783Test
https://hdl.handle.net/20.500.11897/445783Test

المؤلفون: 游乐星, 田晓春, 姜艳霞, 孙世刚

مصطلحات موضوعية: 希瓦氏菌, 突变体, 胞外电子传递, 循环伏安法, 原位红外光谱, S.oneidensis, Mutant, Extracellular electron transfer, Cyclic voltammetry, In situ FTIR

الوصف: 应用循环伏安法和电化学原位红外光谱法研究了希瓦氏菌MR-1,以及敲掉最外层蛋白MtrC/OmcA得到的ΔomcA-ΔmtrC突变体在周转与非周转情况下的电化学行为。循环伏安和原位红外光谱研究都证明希瓦氏菌MR-1野生株和突变株都具有电子传输能力,但是ΔomcA-ΔmtrC突变株的电子传递能力明显比野生株弱。通过电化学原位红外光谱研究,本工作首次提出由细菌代谢乳酸钠所产生的CO2吸收峰(2342cm-1)以及与细菌代谢密切相关的羰基谱峰作为细菌代谢能力的一种评估指标,并推测出希瓦氏菌MR-1可能还存在着一条辅助的电子传递途径。 ; The electrochemical behavior of Shewanella oneidensis(S.oneidensis)MR-1wild type and itsΔomcA-ΔmtrC mutant with MtrC/OmcA protein knock-out were investigated by applying electrochemical cyclic voltammetry and in situ FTIR spectroscopy.The results illustrated that the capability of electron transfer(ET)forΔomcA-ΔmtrC mutant was evidently lower than wily type.Moreover,through in situ FTIR studies,we firstly proposed and quantitatively verified that the intensity of IR absorption bands of CO2(2 342cm-1)produced by lactate through bacteria respiration and the IR absorption bands of carbonyl of outer membrane proteins could be used as an index to assess the capability of bacterial metabolism.Further,apresumably auxiliary extracellular electron transfer(EET)pathway was discussed. ; 国家自然科学基金项目(21273180,21361140374)资助

العلاقة: 光谱学与光谱分析,2016,36(S1):175-176; GUAN2016S1080; https://dspace.xmu.edu.cn/handle/2288/162766Test

الإتاحة: https://dspace.xmu.edu.cn/handle/2288/162766Test

المؤلفون: 朱复春, 姜艳霞, 孙世刚

مصطلحات موضوعية: 石墨烯, 铂基催化剂, 甲醇, 循环伏安法, 电化学原位红外光谱, Graphene, Pt-based catalysts, Methanol, Cyclic votammograme, In-situ electrochemical Fourier infrared spectroscopy

الوصف: 通过多元醇还原法制备了石墨烯(GN)负载的Pt及Pt基多元催化剂:Pt/GN,PtRh/GN,PtSn/GN,PtRhSn/GN。循环伏安研究表明,Rh的加入提升了Pt基催化剂的甲醇电催化氧化活性,而Sn的加入明显降低了甲醇在Pt基催化剂上的过电位,起始氧化电位负移106mV。电化学原位红外光谱研究进一步表明,Rh和Sn的加入使得Pt基催化剂对甲醇氧化的起始氧化电位负移;Rh的加入使得CO谱峰强度增大,而Sn的加入明显降低了CO谱峰强度。三元催化剂PtRhSn/GN很好的综合了Rh和Sn的电子效应及协同效应特点,相比于Pt/GN催化剂,起始氧化电位负移60mV,且活性达到其1.57倍。 ; Pt/GN,PtRh/GN,PtSn/GN and PtRhSn/GN catalysts were synthesized through a polyol method.Electrochemical cyclic voltammetric(CV)result revealed that the additive element Rh can promote the activity while Sn can lower the onset potential of Pt-based catalysts for methanol electro-oxidation.In-situ electrochemical Fourier transform infrared spectroscopy(FTIR)results showed that both Rh and Sn can lower the onset potential,and Sn declined the CO peak intensity while Rh increased.The electronic effect and synergistic effect between the additive element Rh,Sn and Pt made ternary PtRhSn/GN as a promising low-Pt catalyst which showed that the peak current increased by 1.57 times and the onset potential shifted negatively by 60 mV compared with Pt/GN. ; 国家自然科学基金项目(21273180,21361140374,21321062)资助

العلاقة: 光谱学与光谱分析,2016,36(S1):15-16; GUAN2016S1004; https://dspace.xmu.edu.cn/handle/2288/162768Test

الإتاحة: https://dspace.xmu.edu.cn/handle/2288/162768Test

المؤلفون: 郑艳洁, 姚宏, 翁少煌, 彭花萍, 龚仕文, 黄莉, 戴强, 林新华, ZHENG Yan-jie, YAO Hong, WENG Shao-huang, PENG Hua-ping, GONG Shi-wen, HUANG Li, DAI Qiang, LIN Xin-hua

المصدر: http://electrochem.xmu.edu.cn/CN/abstract/abstract10257.shtmlTest.

مصطلحات موضوعية: 硫酸特布他林, 聚铬黑T修饰电极, 循环伏安法, 差示脉冲伏安法, terbutaline sulfate, poly eriochrome black T modified electrode, cyclic voltammetry, differential pulse voltammetry

الوصف: 采用电化学聚合法制备了聚铬黑T膜修饰电极，应用扫描电镜、交流阻抗法和循环伏安法对修饰电极进行表征，以循环伏安法研究硫酸特布他林在修饰电极上的电化学行为，并以差示脉冲伏安法对其含量进行测定.该方法对硫酸特布他林有明显的电催化作用，在pH 7.0磷酸盐缓冲液中，氧化峰电流与硫酸特布他林浓度在1.2x10-7~2.0x10-6mol•L-1范围内呈良好的线性关系，检测限为1.5x10-8 mol•L-1，回收率在97.9%～104.6%之间，RSD在2.8 % (C=8x10-7mol•L-1，n=11).该方法简便灵敏，结果准确可靠，方法重复性好，可用于硫酸特布他林及其片剂的质量控制. ; The poly eriochrome black T modified electrode was prepared by electropolymerization. This modified electrode was characterized by scanning electron microscopy(SEM), electrochemical impedance spectroscopy(EIS) and cyclic voltammetry (CV). The electrochemical behaviors of terbutaline sulfate were studied by CV, while the recoveries were measured by differential pulse voltammetry (DPV). The modified electrode shows excellent electrocatalytic characteristics for terbutaline sulfate. In pH 7.0 phosphate buffer solution, the oxidation peak currents obtained by DPV were linear to the terbutaline sulfate concentrations over the range of1.2x10-7~2.0x10-6mol•L-1. The detection limit was estimated to be1.5x10-8mol•L-1 and the average recovery was 97.9%～104.6%. The relative standard deviation (RSD) was 2.8% for8x10-7mol•L-1terbutaline sulfate (n=11). This method is simple, sensitive, and accurate with good repeatability, and can be used for the determination of terbutaline sulfate and the corresponding tablets. ; 国家863计划项目（2012AA022604）；国家自然科学基金（81171668，21405015 ）；福建省教育厅科技A类项目（JA13147）；大学生创新创业训练计划项目（201410392034，201510392099）资助. ; 作者联系地址：1. 福建医科大学药学院药物分析系, 福建 福州 350108; 2. 福建省高等学校纳米医药技术重点实验室，福建 福州 350108 ; Author's Address: 1. Department of Pharmaceutical Analysis of Fujian Medical University，Fuzhou350108，China; 2. The Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, Fujian Medical University，Fuzhou350108，China ; 通讯作者E-mail：xhl1963@sina.com

العلاقة: 研究论文; Articles; 电化学,2016,22(6):617-623.; http://dx.doi.org/10.13208/j.electrochem.160107Test; http://dspace.xmu.edu.cn/handle/2288/127476Test

الإتاحة: https://doi.org/10.13208/j.electrochem.160107Test
http://dspace.xmu.edu.cn/handle/2288/127476Test

المؤلفون: 杨星, 陈平, YANG Xing, CHEN Ping

المصدر: http://electrochem.xmu.edu.cn/CN/abstract/abstract10223.shtmlTest.

مصطلحات موضوعية: 对磺酸基苯偶氮杯[4]芳烃, 循环伏安法, 玻碳电极, 电化学行为, sulfophenylazo calix[4]arene, cyclic voltammetry, glassy carbon electrode, electrochemical behavior

الوصف: 以杯[4]芳烃和对氨基苯磺酸为原料，经重氮化-偶联反应合成了对磺酸基苯偶氮杯[4]芳烃，并使用紫外吸收光谱、红外吸收光谱、核磁共振等技术对其进行表征分析. 首次以CH3COOH-CH3COONa为缓冲溶液，使用循环伏安法研究对磺酸基苯偶氮杯[4]芳烃的电化学行为. 结果表明，当扫描电位在-0.5 ~ 1 V时，有1对氧化还原峰，其中氧化峰电位为0.302 V，还原峰电位为-0.003 V，且峰电流与峰电位均与扫描速率呈线性关系，推测该峰的形成受扩散控制影响，反应为动力学准一级可逆反应. 进一步利用多种电化学手段研究该电极反应，并求得动力学参数，反应活化能为14.84 kJ•mol-1. ; The p-sulfophenylazo calix[4]arene was synthesized through the diazotization-coupling reaction between calix[4]arene and p-aminobenzene sulfonic acid. The UV-Vis spectroscopy, Infrared spectroscopy, and nuclear magnetic resonance (NMR) were used to characterize the as-prepared p-sulfophenylazo calix[4]arene. The electrochemical behaviors of p-sulfophenylazo calix[4]arene were investigated by cyclic voltammetry and chronoamperometry using CH3COOH-CH3COONa as a buffer solution. The result shows that the p-sulfophenylazo calix[4]arene exhibited a pair of redox peaks in a scan potential region of -0.5 ~ 1 V. The oxidation and reduction peak potentials were 0.302 V and -0.003 V, respectively, and changed with the scanning rates. In addition, the electrode reaction was studied by various electrochemical methods, and the kinetic parameters have also been obtained. The activation energy was found to be 14.84 kJ•mol-1. ; 教育部科学技术研究重点项目（No. 209031）资助 ; 作者联系地址：辽宁石油化工大学材料化学与材料科学学院，辽宁 抚顺 113001 ; Author's Address: School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001, Liaoning, China ; 通讯作者E-mail：chenping-fs@sohu.com

العلاقة: 研究论文; Articles; 电化学,2016,22(1):37-42.; http://dx.doi.org/10.13208/j.electrochem.150604Test; http://dspace.xmu.edu.cn/handle/2288/98010Test

الإتاحة: https://doi.org/10.13208/j.electrochem.150604Test
http://dspace.xmu.edu.cn/handle/2288/98010Test