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阴极催化
相关语句
  cathode catalyst
    MEMBRANE AND CATHODE CATALYST LAYER NUMERICAL SIMULATION OF PEMFCS
    PEMFCs的膜及阴极催化层数值模拟
短句来源
    When current density was 600mA/cm2, the voltage of cell fluctuated between 0.50V~0.55V and resistance was among 0.060 ohom-cm2~0.065 ohom-cm2. Calculated simulation got cathode catalyst layer water distribute, increased wet channel corresponding catalyst layer range water concentration more than 0.85, water concentration of other parts is about 0.155. Increased wet channel can offer enough humidifying to the cathode.
    在电流密度为600mA/cm2条件下,100分钟内电压在0. 50V~0. 55V和电阻在0. 060ohom-cm2~0. 065ohom-cm2波动。 计算模拟得到阴极催化层中的水浓度分布,增湿槽道对应部分的水浓度在0. 85以上,其余部分的水浓度在0. 155左右。
短句来源
    The enrichment of ionomer close to the surface of the cathode catalyst layer was studied and possible mechanisms were also proposed.
    研究了转压法制备过程中Nafion聚合物向阴极催化层表面迁移的现象,并提出了可能的机理; 考察了阴极催化层表面Nafion聚合物含量对电池性能的影响。
短句来源
    A novel double-layered cathode catalyst layer for DMFC was prepared, which consisted of Pt black inner catalyst layer and 20wt.% Pt/C (or 40wt.% Pt/C) outer catalyst layer.
    研究了阴极催化层中加入碳粉对电池性能的影响,结果表明加入Ketjen BlackEC-300J碳粉的阴极性能最优,在电池温度为60℃,空气自呼吸条件下,Pt黑和Pt黑+10wt.%KB阴极的电池最高功率密度分别为19.0和48.9mW/cm~2。
短句来源
    At last, the transport equations and electrochemical dynamics equations are solved simultaneously by PEMFC module of software Fluent, and the water distribution and current density distribution in proton exchange membrane, the saturation and oxygen concentration distribution on interface between cathode catalyst layer and diffusion layer, water concentration distribution across MEA and the V-I curve are all obtained.
    最后,利用Fluent软件的燃料电池模块求解传递方程组和电化学动力学方程,获得了质子交换膜中的水分布和电流密度分布、阴极催化层上的液态饱和度和氧气浓度分布、穿过膜电极方向水蒸汽的浓度和燃料电池的性能曲线。
短句来源
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  “阴极催化”译为未确定词的双语例句
    A Study on Improving the Catalytic Activity of Ti Cathode by Implanting Ni Ions
    注入镍离子提高钛阴极催化活性的研究
短句来源
    Mathematical Simulation of electrode performance on Proton Exchange Membrabce Fuel Cells
    PEMFC阴极催化层电化学性能的数学模拟
短句来源
    Some other methods for improving catalyst activity such as cathode catalyze, alloy catalyst are also reviewed in the paper. Finally, some reasonable advises are given based on these progresses.
    也回顾了一些用于改善催化剂活性的其他方法,如阴极催化、合金催化剂,根据这些进展,对今后的研究方向提出了建议。
短句来源
    (2) When the thickness of cathodic catalyst layer is decreased, the electrode potential is increase.
    (2)阴极催化层厚度减小,可提高电池输出电压;
短句来源
    In general,the temperature difference in a single channel of the fuel cell is very small. The difference of temperature is about 1K in the catalyst layer of the anode and less than 3K in that of the cathode. The maximum temperature emerges in the reaction zone of the cathodal catalyst layer.
    总体而言,单流道燃料电池温差很小,阳极催化层温差大致在1 K左右,而阴极催化层温差小于3 K,最高温度发生在阴极催化层的反应区.
短句来源
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  cathode catalyst
In some cases, conventional fuel cell types like the MCFC and the SOFC may be used without change, in other cases maybe only the anode or cathode catalyst materials have to be modified or replaced.
      
The simulation results can be used to determine the catalyst content of cathode catalyst layer and the corresponding optimal thickness of PEM.
      
Platinum is considered the best cathode catalyst toward oxygen reduction to water; however, Pt remains an expensive metal of low abundance, and it is of great importance to find Pt-free metal alternatives.
      
Furthermore, it suggested that a better single DMFC performance could be obtained with a smaller particle size Pt-based cathode catalyst.
      
Changes in cathode catalyst structure and activity in phosphoric acid fuel cell operation
      
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Ni-S alloy coating electrodes with different sulphur content were prepared by means of electrodeposition method. The catalyzing property of the different coating electrodes as the hydrogen evolution-cathode in 5 mol/L NaOH solution at 80 ℃ was studied by means of constant-current polarization method. The structures of Ni-S alloy coating electrodes were also analyzed by XRD and SEM. The results show that the Ni-S alloy electrode with sulphur content...

Ni-S alloy coating electrodes with different sulphur content were prepared by means of electrodeposition method. The catalyzing property of the different coating electrodes as the hydrogen evolution-cathode in 5 mol/L NaOH solution at 80 ℃ was studied by means of constant-current polarization method. The structures of Ni-S alloy coating electrodes were also analyzed by XRD and SEM. The results show that the Ni-S alloy electrode with sulphur content of 29.4%(atomic percetage) performs excellent catalyzing property. Its hydrogen-evolution overpotential is the lowest at the current density of 150 mA/cm 2, which is 350 mV lower than that of Fe. This property is related to its structure.

用电沉积法制备各种硫含量的Ni S合金镀层电极。用恒电流极化法研究各电极在 80℃的 5mol/LNaOH溶液中作为析氢反应阴极的催化性能 ,并用XRD及SEM研究Ni S合金镀层的组织结构。实验结果表明 ,硫含量为 2 9.4% (原子百分比 )的Ni S合金电极具有优良的催化性能 ,在 15 0mA/cm2 的电流密度下 ,析氢反应过电位最低 ,比Fe低约 35 0mV。这与其组织结构有关。

Membrane Electrode Assembly (MEA) is one of the key elements of proton exchange membrane

膜电极(MEA)作为质子交换膜燃料电池(PEMFC)的核心组件之一,其结构和组成对电池的性能有着重要的影响。提高膜电极性能的一个重要的指导思想是在催化粒子的周围形成良好的质子、电子和气体通道。以此为主线,从电极制备工艺的发展历程,Nafion的使用与质子通道的改进、电子通道的改进、阴极催化等几个方面详细地总结和讨论了近年来MEA的研究状况,并在此基础上对MEA的进一步研究提出了若干建议。

Membrane electrode assembly (MEA) is the central portion of proton exchange membrane fuel cell (PEMFC). Therefore, including the catalyst layer, the materials and structures of the MEA are considered to have most effects on PEMFC performance. Channels for three phases (proton, electron and gas) on the catalyst surface are considered essential for the catalysis during the cell performing. In this paper, some progresses for catalyst layer in the past several years are introduced and detailed in enhances for three-phase...

Membrane electrode assembly (MEA) is the central portion of proton exchange membrane fuel cell (PEMFC). Therefore, including the catalyst layer, the materials and structures of the MEA are considered to have most effects on PEMFC performance. Channels for three phases (proton, electron and gas) on the catalyst surface are considered essential for the catalysis during the cell performing. In this paper, some progresses for catalyst layer in the past several years are introduced and detailed in enhances for three-phase channels. Some other methods for improving catalyst activity such as cathode catalyze, alloy catalyst are also reviewed in the paper. Finally, some reasonable advises are given based on these progresses.

膜电极(MEA)是质子交换膜燃料电池(PEMFC)的核心技术。膜电极包含的催化剂层、材料和结构等对PEMFC的性能影响很大。催化剂面层上供三相(质子、电子、气体)用的通道对于电池使用时的催化作用是必不可少的。介绍了近几年催化剂的研究进展,看重对三相通道进行了详细叙述。也回顾了一些用于改善催化剂活性的其他方法,如阴极催化、合金催化剂,根据这些进展,对今后的研究方向提出了建议。

 
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