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cyclic voltammetry technique
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  循环伏安法
    The electrochemical reduction behaviour of Schiff base on glassy carbon electrode was investigated in ethanol and 30%(V∶V) ethanolic B-R buffer solutions(pH=7~11) respectively using cyclic voltammetry technique.
    合成了五种带有不同取代基的水杨醛缩芳胺类席夫碱,并利用循环伏安法研究其分别在0.1 mol. L-1的LiClO4-无水乙醇溶液以及含30%(V∶V)无水乙醇的B-R缓冲溶液(pH=7~11)中玻碳电极上的电化学行为.
短句来源
    The main contents are as follows:Firstly, the electrochemical behaviors of the synthesized Schiff bases (S1-S5) were investigated in solutions by cyclic voltammetry technique.
    一、采用循环伏安法探索五种水杨醛缩芳胺席夫碱S1-S5在溶液状态的电化学行为。
短句来源
    The electrochemical reduction characteristics of chlorinated hydrocarbon at the copper electrodes were investigated by using cyclic voltammetry technique. The experimental results showed that chlorinated paraffin hydrocarbons could be reduced directly at the copper electrode,and chlorinated aromatic hydrocarbons were not as easily reduced directly at the copper electrode.
    采用循环伏安法,对氯代烃类化合物在铜电极表面上的电还原特性进行了研究,结果表明,氯代烷烃类化合物能在铜电极表面被直接还原,氯代芳烃不易在铜电极上被直接还原.
短句来源
  循环伏安测试
    In the thesis, the effects of F-, Cl-, Br-, CO32-, SO42-, PO43- and NO3-, which worked as the electrolyte additives, on the electrochemical properties of the nickel hydroxide electrode were studied by using constant current and cyclic voltammetry technique .
    以添加剂的形式在电解液中加入F~-、CI~-、Br~-、CO_3~(2-)、SO_4~(2-)、PO_4~(3-)和NO_3~-,通过恒电流充放电和循环伏安测试技术,考察它们对Ni(OH)_2正极性能的影响。
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  cyclic voltammetry technique
A cyclic voltammetry technique was used to study the interactions of mineral-pyrite during bioleaching with the bacteriumThiobacillus (T.) ferrooxidans over its entire growth cycle.
      
A cyclic voltammetry technique has been developed to provide a rapid, quantitative evaluation of the effectiveness of selected organic additives in minimizing the deleterious effects that impurities, such as antimony, have on zinc deposition.
      
A cyclic voltammetry technique has been developed to provide a rapid, quantitative evaluation of the effectiveness of selected organic additives in minimizing the deleterious effects that impurities, such as antimony, have on zinc deposition.
      
The electrochemical reduction of a number of polyfluorovinyl halides RCF=CFX (R =t-C4F9, X = F, Cl, Br; R = Ph, X = F, Cl) has been studied by the cyclic voltammetry technique using various different electrodes.
      
The problem of mass transfer by diffusion in the present system was confirmed by measurements of the diffusion coefficient and by electron transfer fraction experiments carried out through the use of a cyclic voltammetry technique.
      
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The heteropolymolybdates of Keggin structural anion with different center atoms, M3(XMo12O40) in which M=K+, NH4+; X=P, As, were synthesized. Their redox and acidic proper-ties were examined by means of FTIR, ESR, TPD, and cyclic voltammetry techniques. Based on a comparison of heteropolymolybdate of both kinds of center atom(P, As), we found that the one con-tainning As atom is easier reducible and possesses lower acid strength. As a result, the catalyst con-tainning As anion is less active for the oxidative...

The heteropolymolybdates of Keggin structural anion with different center atoms, M3(XMo12O40) in which M=K+, NH4+; X=P, As, were synthesized. Their redox and acidic proper-ties were examined by means of FTIR, ESR, TPD, and cyclic voltammetry techniques. Based on a comparison of heteropolymolybdate of both kinds of center atom(P, As), we found that the one con-tainning As atom is easier reducible and possesses lower acid strength. As a result, the catalyst con-tainning As anion is less active for the oxidative dehydrogenation of isobutylaldehyde, however, is more selective for the formation of methacrylic acid. These effects of center atom in heteropolyacid salt on the oxidative dehydrogenation activity and the oxidation selectivity may be related to the increasing of oxidation-redaction potential and facility of donating bridged oxygen of the As anion.

合成了具有不同中心原子Keggin阴离子结构的杂多钼酸盐M_3(XMo_(12)O_(40))(M=K~+,NH_4~+,X=P,As)。利用FTIR、TPD、ESR和CV等手段考查了各化合物的氧化还原性质和酸性。比较两种不同中心原子的杂多钼酸盐,其中砷为中心原子的更容易被还原及有较低的酸强度,这类催化剂对异丁醛氧化脱氢活性较低,而对异丁醛氧化为甲基丙烯酸有较高的选择性,中心原子对活性和选择性的影响分别与它们氧化还原电位的升高关联,也与更易给出轿式氧有关。

The electrooxida tion of active carbon and acetylene black was studied using MSCV (Mass Spectroscopic Cyclic Voltammetry) technique over pH 1-12. For both active carbon and acetylene black the pH dependenoes of φ_s and η_s (the onset potential and overpotential of CO_2 formation), I_M (the mass intengity of CO_2 at a given potential) and φ_I (the potential at a given mass intensity) are all broken lines deflecting near pH 7. These phenomena imply that the mechanism of carbon oxidation is different...

The electrooxida tion of active carbon and acetylene black was studied using MSCV (Mass Spectroscopic Cyclic Voltammetry) technique over pH 1-12. For both active carbon and acetylene black the pH dependenoes of φ_s and η_s (the onset potential and overpotential of CO_2 formation), I_M (the mass intengity of CO_2 at a given potential) and φ_I (the potential at a given mass intensity) are all broken lines deflecting near pH 7. These phenomena imply that the mechanism of carbon oxidation is different in acidio and basic media. Both η_s and Tafel slope b in the range of pH>7 were found higher than that in pH<7. Based on these observations it is postulated that in acidic media the O atom needed for CO_2 formation comes from the discharge of H_2O molecules and the oxidation of carbon bo CO_2 is easier than in basic media where the O atom comes from the discharge of OH~-.

用MSCV法研究了活性炭及乙炔黑在pH1—12范围内的电氧化,两种炭的φ_s、η_s与pH的关系(φ_(?)及η_(?)是CO_2开始析出的电位及超电位)以及I_M、φ_I与pH的关系(I_M、φ_I分别为给定电位下的质谱强度及给定I_M下的电位)均为一折点在的pH~7的折线.这暗示酸、碱介质中有不同的氧化机理.pH>7时,η_s及Tafel斜率b均较pH<7时的大.似可推断在酸性介质中形成CO_2所需的氧原子来自水分子放电,其活性明显大于来自碱性溶液中OH~-放电产生的氧原子.因而在酸性介质中炭氧化为CO_2较碱性介质中易于进行.两种炭之间氧化活性亦有明显区别.活性炭的φ_(?)比φ°(O_2/H_2O)负400—600mV;乙炔黑的φ_s则接近或正于φ°(O_2/H_2O).前者的I_M及b均较后者大.乙炔黑较低的氧化活性可归因于其较高的有序性结构.

The electroreduction of allyl alcohol was studied using MSOV (Mass Spectrometric Cyclic Voltammetry) technique at porous Pt electrodes in 0.5mol·dm~(-3) HClO_4. Two types of reactions are mainly involved in the reduction of allyl alcohol: C—OH bond cleavage from allyl group with formation of propene and the hydrogenation of propene to propane. The mass spectrometric current (I_M)-φ (potential) curves of the fragments provide detailed information for some of the partial reactions. For all the...

The electroreduction of allyl alcohol was studied using MSOV (Mass Spectrometric Cyclic Voltammetry) technique at porous Pt electrodes in 0.5mol·dm~(-3) HClO_4. Two types of reactions are mainly involved in the reduction of allyl alcohol: C—OH bond cleavage from allyl group with formation of propene and the hydrogenation of propene to propane. The mass spectrometric current (I_M)-φ (potential) curves of the fragments provide detailed information for some of the partial reactions. For all the m/z values studied the logI_M-φ relations exhibit a linear range and their tafel slops were obtained. Possible reaction mechanisms are proposed based on experimental results.

用MSCV法研究了烯丙醇在多孔Pt电极上0.5mol·dm~(-3)KClO_4中的电还原.烯丙醇电还原时主要涉及二类反应:烯丙基上C—OH断键生成丙烯;丙烯进一步氢化生成丙烷.表征丙烯及丙烷的诸碎片m/z的质谱电流(I_M)-电极电位(φ)扫描曲线详细描绘了各分步反应的状况.在一定电位范围,各m/z的IgI_M-φ呈线性;求得各有关m/z的Tafel斜率.根据实验结果对反应机理进得了详细分析.

 
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