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charge transfer diffusion coefficient
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  电荷传递扩散系数
     The electrochemical parameters ,such as charge transfer diffusion coefficient, D ct ,and apparent rate cnstant of heterogeneous electrode reaction, K 0′ ,were estimeted. The MnPc DDAB film electrode could be used to catalyze electrochemical reduction of trichloracetic acid
     本文着重探讨了第二对峰的电化学行为,估计了该体系的电荷传递扩散系数Dct和表观非均相电极反应速率常数K0′等电化学参数,并可将该薄膜电极用于催化三氯乙酸的电化学还原。
短句来源
  “charge transfer diffusion coefficient”译为未确定词的双语例句
     The kinetics of prussian blue (PB) film itself during the redox process and of the catalytic oxidation of ascorbic acid (AH_2) on it have been studied in detail. The charge transfer diffusion coefficient D_(ct) in PB film is determined as 2.62×10~(-10)cm~2·s~(-1), using potential-step chronoamperometry, chronocoulometry and constant-current chronopotentialmetry, respectively.
     本文详细研究了普鲁士蓝(PB)薄膜本身电荷传输过程的动力学及PB薄膜催化抗坏血酸(AH_2)电氧化的动力学,用电位阶跃计时电流法和计时电量法,恒电流计时电位法测得PB膜中电荷传输表观扩散系数D_(ct)平均为2.62×10~(-10)cm~2·s~(-1);
短句来源
  相似匹配句对
     The diffusion coefficient D is calculated.
     计算出了扩散系数D .
短句来源
     From the i l,s of the CV of the microelectrode, the charge transfer coefficient α was evaluated.
     求得电荷传递系数α=0 .44和反应速率常数 k0 =1 .65× 1 0 -2 cm/s.
短句来源
     With decreasing the diffusion asymmetry coefficient m'.
     随着扩散非对称性系数m′的减小,扩散过程中纳米多层薄膜的界面由宽化逐渐向平直转变。
短句来源
     The increase of the charge transfer resistance Ret and the decrease of Li ion diffusion coefficient Dy are two important reasons for the capacity decrease.
     探讨了掺杂后容量下降的因素,认为电荷传递电阻增大和锂离子扩散系数减小是掺杂后尖晶石锂锰氧化物容量下降两个重要因素。
短句来源
     CHARGE TRANSFER AND COLOUR OF MATERIALS
     荷移跃迁与物质的颜色
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The kinetics of prussian blue (PB) film itself during the redox process and of the catalytic oxidation of ascorbic acid (AH_2) on it have been studied in detail. The charge transfer diffusion coefficient D_(ct) in PB film is determined as 2.62×10~(-10)cm~2·s~(-1), using potential-step chronoamperometry, chronocoulometry and constant-current chronopotentialmetry, respectively. The rate constant of the cross-exchange reaction between AH_2 in solution and the active centers in PB film is measured in rotating...

The kinetics of prussian blue (PB) film itself during the redox process and of the catalytic oxidation of ascorbic acid (AH_2) on it have been studied in detail. The charge transfer diffusion coefficient D_(ct) in PB film is determined as 2.62×10~(-10)cm~2·s~(-1), using potential-step chronoamperometry, chronocoulometry and constant-current chronopotentialmetry, respectively. The rate constant of the cross-exchange reaction between AH_2 in solution and the active centers in PB film is measured in rotating disk electrode as 1.23×10~8cm~3·mol~(-1)·s~(-2). The catalytic reaction occurs only at the outmost part of the PB film and is first order to the bulk concentration of AH_2. The overall process can be limited by mass transfer in solution, by cross-exchange reaction at the film-solution interface, by charge transfer within the film or by some kind of combination of them, with four kinetic subcases experimentally observed and analyzed.

本文详细研究了普鲁士蓝(PB)薄膜本身电荷传输过程的动力学及PB薄膜催化抗坏血酸(AH_2)电氧化的动力学,用电位阶跃计时电流法和计时电量法,恒电流计时电位法测得PB膜中电荷传输表观扩散系数D_(ct)平均为2.62×10~(-10)cm~2·s~(-1);用RDE法测得AH_2在PB薄膜上催化氧化的速率常数为1.23×10~8cm~3·mol~(-1)·s~(-1),催化反应对AH_2为一级,只发生在PB薄膜与溶液的界面上,整个催化过程受到溶液中的传质、膜内部的电荷传输及膜与溶液界面上交叉反应三种因素单独或联合控制,实际出现四种动力学情况。

anganese phthalocyanine(MnPc) didodecyldimethylammonium bromide(DDAB) surfactant film electrode was prepared by casting the mixture of MnPc with DDAB chloroform solution onto the surface of pyrolytic graphite electrode and then evaporating the chloroform .Cyclic voltammetric experiments showed that,in KBr solution,the film electrode had two pairs of well defined and stable reduction and oxidation peaks.For the first pair of peaks, E pc1 =-0 27V and E pa1 =0 01V( vs .SCE) ,while for the secnd...

anganese phthalocyanine(MnPc) didodecyldimethylammonium bromide(DDAB) surfactant film electrode was prepared by casting the mixture of MnPc with DDAB chloroform solution onto the surface of pyrolytic graphite electrode and then evaporating the chloroform .Cyclic voltammetric experiments showed that,in KBr solution,the film electrode had two pairs of well defined and stable reduction and oxidation peaks.For the first pair of peaks, E pc1 =-0 27V and E pa1 =0 01V( vs .SCE) ,while for the secnd pair, E pc2 =-0 76V, E pa2 =-0 62V.This paper studied the electrochemistry of the second pair in detail.The electrochemical parameters ,such as charge transfer diffusion coefficient, D ct ,and apparent rate cnstant of heterogeneous electrode reaction, K 0′ ,were estimeted.The MnPc DDAB film electrode could be used to catalyze electrochemical reduction of trichloracetic acid

将酞菁锰(MnPc)掺入阳离子表面活性剂双十二烷基二甲基溴化铵(DDAB)的氯仿溶液,并涂布于热解石墨电极表面,待氯仿挥发后即制得MnPc-DDAB薄膜电极。循环伏安实验表明,在KBr溶液中,该薄膜电极有两对还原氧化峰,第一对峰的Epc1=-0.27V,Epa1=0.01V;第二对峰的Epc2=-0.76V,Epa2=-0.62V(vs.SCE)。本文着重探讨了第二对峰的电化学行为,估计了该体系的电荷传递扩散系数Dct和表观非均相电极反应速率常数K0′等电化学参数,并可将该薄膜电极用于催化三氯乙酸的电化学还原。

The charge transport performance of the Nafion-based redox polymer films prepared under different conditions was investigated by cyclic voltammetry in the sandwiched cells.The results showed that the apparent charge transfer diffusion coefficient(Dct)of the Nafion[M(bpy)2+3,PEG(polyethylene glycol)](M=Ru or Fe)films is about 10-6-10-7 cm2·s-1 and the mobility of the electron or hole(μ)was about 10-4-10-5 cm2·V-1·s-1.In order to decrease the resistance of the interface,a polyaniline(PANI)layer was added...

The charge transport performance of the Nafion-based redox polymer films prepared under different conditions was investigated by cyclic voltammetry in the sandwiched cells.The results showed that the apparent charge transfer diffusion coefficient(Dct)of the Nafion[M(bpy)2+3,PEG(polyethylene glycol)](M=Ru or Fe)films is about 10-6-10-7 cm2·s-1 and the mobility of the electron or hole(μ)was about 10-4-10-5 cm2·V-1·s-1.In order to decrease the resistance of the interface,a polyaniline(PANI)layer was added to the interface of indium tin oxide coated conducting glass(ITO)electrode and the redox polymer.Consequentially,the Dct could be increased to about 10-5-10-6 cm2·s-1 and μ to about 10-3-10-4 cm2·V-1·s-1,and the operating current of the cells under 600 mV bias could be increased by almost 100 times.In addition,the Dct and μ of this redox polymer film had just reduced slightly after 30 d kept in atmosphere.Therefore,the redox polymer film is sufficiently stable.

利用三明治电池和伏安法测试了不同制备条件的Nafion基氧化还原聚合物膜在空气中的电荷传输性能.研究结果表明,混合适量聚乙二醇(PEG)的Nafion基金属联吡啶配合物{Nafion[M(bpy)23+,PEG](M=Ru,Fe)}膜的表观电荷传递扩散系数(Dct)达到10-6-10-7cm2·s-1,电子或空穴迁移率(μ)达到10-4-10-5cm2·V-1·s-1.在导电玻璃(ITO)电极与Nafion基氧化还原聚合物膜界面引入一层导电聚苯胺(PANI)后,降低了其接触电阻,使氧化还原聚合物膜的Dct提高至10-5-10-6cm2·s-1,μ提高至10-3-10-4cm2·V-1·s-1,且工作电流提高了近两个数量级.该固态氧化还原聚合物膜的性能比较稳定,在空气中放置30天后其Dct和μ降低得很少.

 
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