陈金华
从事纳米材料(碳纳米管、金属和金属氧化物纳米材料、导电聚合物纳米材料等)的制备及其在燃料电池、高比能电池、超电容器等方面的应用、电分析化学、化学与生物传感等研究
个性化签名
- 姓名:陈金华
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
应用化学(具体应用入有关学科)
- 研究兴趣:从事纳米材料(碳纳米管、金属和金属氧化物纳米材料、导电聚合物纳米材料等)的制备及其在燃料电池、高比能电池、超电容器等方面的应用、电分析化学、化学与生物传感等研究
陈金华,男,1965年5月生于浙江省临海市,汉族。理学博士,湖南大学化学化工学院教授,博士生导师。1998年7月 至2001年2月在美国State University of New York at Buffalo和Boston College从事博士后研究工作。现任湖南大学化学生物传感与计量学国家重点实验室副主任。主持完成和正在进行的项目有国家自然科学基金、湖南省杰出青年基金、湖南省自然科学基金、教育部留学归国人员科研启动基金(重点项目)、高校博士点基金等项目多项。入选2004年教育部 “新世纪优秀人才支持计划”。从事纳米材料(碳纳米管、金属和金属氧化物纳米材料、导电聚合物纳米材料等)的制备及其在燃料电池、高比能电池、超电容器等方面的应用、电分析化学、化学与生物传感等研究,已在国内外刊物上发表论文60余篇,其中在Carbon、 Applied Catalysis A: General、 Electrochimica Acta, Analytical Chimica Acta, Analytical Biochemistry 等SCI收录源刊物上发表50余篇。
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642
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10
陈金华, Zhibin He, Jinhua Chen*, Dengyou Liu, Haihui Zhou, Yafei Kuang
Diamond & Related Materials 13(2004)1764-1770,-0001,():
-1年11月30日
The electrochemical deposition of Pt-Ru nanoparticles on carbon nanotube electrode and their electrocatalytic properties have been investigated in this paper. Carbon nanotubes (CNTs) used in this paper are grown directly on graphite substrate by chemical vapor deposition (CVD). The Pt-Ru nanoparticles are synthesized by potentiostatic method from 0.5M H2SO4 aqueous solutions with ruthenium chloride and chloroplatinic acid at 0.25V. The micrographs of Pt-Ru/CNT/graphite electrode are characterized by scanning electron microscopy. The electrocatalytic properties of Pt-Ru/CNT/graphite electrodes for methanol oxidation have been investigated by cyclic voltammetry in 1.0M CH3OH+0.5M H2SO4 aqueous solutions. The effect of ratios of Pt to Ru in the deposition bath solution on the electrocatalytical properties of Pt-Ru/CNT/graphite electrode was also investigated. The results show that the peak potential for methanol oxidation shifts to lower potential and the existing Ru can improve the stability and activity of electrode for methanol oxidation. This may be attributed to the bifunctional mechanism of Ru to Pt, which also reveals that CNTs have good potential applications as catalyst supports in direct methanol fuel cell (DMFC).
Pt-Ru nanoparticles, Carbon nanotubes, Methanol oxidation
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陈金华, Manli Guo a, b, Jinhua Chen b, *, Dengyou Liu b, Lihua Nie a, Shouzhuo Yao a
Bioelectrochemistry 62(2004)29-35,-0001,():
-1年11月30日
Immobilization of DNA on carbon nanotubes plays an important role in the development of new types of miniature DNA biosensors. Electrochemical characteristics of the immobilization of calf thymus DNA molecules on the surfaces of multi-walled carbon nanotubes (MWNTs) have been investigated by cyclic voltammetry and electrochemical impedance analysis. The peak currents for Fe(CN)63/Fe(CN)64redox couple observed in the cyclic voltammograms decrease and the electron-transfer resistance (Ret) obtained from the Nyquist plots increase due to the immobilization of DNA molecules (dsDNA or ssDNA) on the surfaces of MWNTs. Most of calf thymus DNA are covalently immobilized on MWNTs via diimide-activated amidation between the carboxylic acid groups on the carbon nanotubes and the amino groups on DNA bases, though the direct adsorption of the DNA molecules on MWNTs can be observed. Additionally, the interaction between DNA molecules immobilized on MWNTs and small biomolecules (ethidium bromide) can be observed obviously by cyclic voltammetry and electrochemical impedance analysis. This implies that the DNA molecules immobilized at the surface of MWNTs, with little structure change, still has the ability to interact with small biomolecules.
Calf thymus DNA, Ethidium bromide, Multi-walled carbon nanotubes, Immobilization, Electrochemical characteristics
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陈金华, Manli Guo, Jinhua Chen, *, Jia Li, Lihua Nie, Shouzhuo Yao*
Electroanalysis 2004, 16, No.23,-0001,():
-1年11月30日
imum response current density were calculated to be 7.17mM and 7.32μAcm-2, respectively.
Multi-walled carbon nanotube,, Amperometric biosensor,, Layer-by-layer,, Cholesterol,, Cholesterol oxidase
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陈金华, Dawei Pan, Jinhua Chen*, Lihua Nie, Wenyan Tao, Shouzhuo Yao
Electrochimica Acta 49(2004)795-801,-0001,():
-1年11月30日
An amperometric glucose biosensor is developed, based on immobilization of glucose oxidase (GOX) in an electrochemically polymerized, non-conducting poly (o-aminophenol) (POAP) film at Prussian blue (PB)-modified platinum (Pt) microelectrode. Effects of polymerization cycle number for POAP and PB, applied potential used in the determination, pH value of the detection solution and electroactive compounds on the amperometric response of the sensor were investigated and discussed. The electroactive property and rough surface of PB film result in the improvement of the detection limit and the increase of the maximum response current and sensitivity. The biosensor based on Pt/PB/POAP/GOX electrode has two times lower detection limit, five times larger maximum current and nine times higher sensitivity than those of the biosensor based on Pt/POAP/GOX electrode. Additionally, the biosensor shows fast response time, large response current, and good anti-interferent ability for l-ascorbic acid, uric acid and acetaminophen. Excellent reproducibility and stability of biosensor are also observed.
Glucose oxidase, Poly (, o-aminophenol), , Prussian blue, Electrochemical polymerization, Biosensor
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陈金华, Shidong Fei, Jinhua Chen*, Shouzhuo Yao, Guohong Deng, Deliang He, Yafei Kuang
Analytical Biochemistry 339(2005)29-35,-0001,():
-1年11月30日
The electrochemical behavior of L-cysteine (CySH) on platinum (Pt)/carbon nanotube (CNT) electrode was investigated by cyclic voltammetry. CNTs used in this study were grown directly on graphite disk by chemical vapor deposition. Pt was electrochemically deposited on the activated CNT/graphite electrode by electroreduction of Pt(IV) complex ion on the surface of CNTs. Among graphite, CNT/graphite, and Pt/CNT electrodes, improved electrochemical behavior of CySH oxidation was found with Pt/CNT electrode. On the other hand, a sensitive CySH sensor was developed based on Pt/CNT/graphite electrode. A linear calibration curve can be observed in the range of 0.5μM-0.1mM. The detection limit of the Pt/CNT electrode is 0.3μM (signal/noseD3). EVects of pH, scan rate, and interference of other oxidizable amino acids were also investigated and discussed. Additionally, the reproducibility, stability, and applicability of the Pt/CNT electrode were evaluated.
L-Cysteine, Electrocatalytic oxidation, Carbon nanotubes, Platinum
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陈金华, Hao Tang, a, Jinhua Chen, b, *, Shouzhuo Yao, Lihua Nie, Guohong Deng, and Yafei Kuang b
Analytical Biochemistry 33(2004)89-97,-0001,():
-1年11月30日
A new amperometric biosensor, based on adsorption of glucose oxidase (GOD) at the platinum nanoparticle-modiWed carbon nanotube (CNT) electrode, is presented in this article. CNTs were grown directly on the graphite substrate. The resulting GOD/Pt/CNT electrode was covered by a thin layer of NaWon to avoid the loss of GOD in determination and to improve the anti-interferent ability. The morphologies and electrochemical performance of the CNT, Pt/CNT, and NaWon/GOD/Pt/CNT electrodes have been investigated by scanning electron microscopy, cyclic voltammetry, and amperometric methods. The excellent electrocatalytic activity and special three-dimensional structure of the enzyme electrode result in good characteristics such as a large determination range (0.1-13.5mM), a short response time (within 5s), a large current density (1.176mAcm-2), and high sensitivity (91mAM-1cm-2) and stability (73.5% remains after 22 days). In addition, eVects of pH value, applied potential, electrode construction, and electroactive interferents on the amperometric response of the sensor were investigated and discussed. The reproducibility and applicability to whole blood analysis of the enzyme electrode were also evaluated.
Carbon nanotubes, Platinum nanoparticle, NaWon, Glucose oxidase, Biosensor
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陈金华, H. Tang, J.H. Chen*, M.Y. Wang, L.H. Nie, Y.F. Kuang, S.Z. Yao
Applied Catalysis A: General 275(2004)43-48,-0001,():
-1年11月30日
A platinum overlayer was prepared on Au nanoparticles that were electrodeposited on a graphite electrode by replacement of the underpotential deposition (UPD) Cu monolayer. The micrographs and element composition of Au nanoparticles and UPD Cu monolayers were characterized by scanning electron microscopy (SEM) and energy disperse X-ray spectroscopy (EDS), respectively. The electrocatalytic properties of Pt overlayer/Au/graphite electrode for methanol oxidation have been investigated by cyclic voltammetry (CV). High electroactivity and good long-term stability can be observed. These results indicate that the core (Au nanoparticle)-shell (Pt overlayer) nanocatalyst obtained by the above method may have good potential applications in designing noble metal catalysts with super low loading and high activity at the atomic level in fuel cells.
Platinum, Au nanoparticles, Under-potential deposition (, UPD), , Methanol oxidation
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陈金华, J.H. Chen, W.Z. Li, D.Z. Wang, S.X. Yang, J.G. Wen, Z.F. Ren*
Carbon 40(2002)1193-1197,-0001,():
-1年11月30日
Carbon nanotubes uniformly 50nm in diameter were directly grown on graphite foil. Cyclic voltammetry (CV) shows that the carbon nanotube/graphite foil electrode has a high specific capacitance (115.7F/g at a scan rate of 100mV/s) and exhibits typical double-layer behavior. A rectangular-shaped CV curve persists even at a scan rate of 100mV/s in 1.0M H SO aqueous solution, which suggests that the carbon nanotube electrode could be an excellent candidate as the electrode 24 in electrochemical double-layer capacitors. In addition, the influence of the potential scan rate, aging, and the electrolyte solution on the specific capacitance of nanotube electrodes was also studied.
A., Carbon nanotubes,, Electrodes, B., Chemical vapor deposition, C., Scanning electron microscopy (, SEM), ,, Sputtering
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【期刊论文】Ethanol electro-oxidation with Pt and Pt-Ru catalysts supported on carbon nanotubes
陈金华, M.Y. Wang, J.H. Chen*, Z. Fan, H. Tang, G.H. Deng, D.L. He, Y.F. Kuang
Letters to the Editor/Carbon 42(2004)3251-3272,-0001,():
-1年11月30日
A., Carbon nanotubes, Electrodes, B., Catalyst, D., Catalytic properties
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陈金华, H. Tang a, J.H. Chen a, *, Z.P. Huang b, D.Z. Wang b, Z.F. Ren b, L.H. Nie a, Y.F. Kuang a, S.Z. Yao a
H. Tang et al./Carbon 42(2004)191-197,-0001,():
-1年11月30日
Platinum (Pt) electrocatalyst was electrochemically dispersed on well-aligned carbon nanotube (CNT) arrays by a potential-step method. The structure and elemental composition of the resulting Pt/CNT electrode were characterized by scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray spectroscopy. The electrocatalytic properties of the Pt/CNT electrode for oxygen reduction reaction have been investigated by linear sweep voltammetry. Compared with a Pt/graphite electrode, higher electrocatalytic activity of the Pt/CNT electrode can be observed. This may be attributed to the high dispersion of platinum catalysts and the particular properties of CNT supports. The results imply that the Pt/CNT has good potential applications in proton exchange membrane fuel cells.
A., Carbon nanotubes,, electrodes, B., Chemical vapor deposition, D., Electrochemical properties
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