双金属耐磨复合管的离子极化过程 |
添加时间:2018/11/5 16:25:20 浏览次数: |
双金属耐磨复合管氧还原活性提高,阴极活性和单电池的功率密度输出也有一定程度的提高。600℃时获得了859mWcm-2的最大功率密度。使用修饰后电极的单电池在5h的恒外阻放电过程中保持稳定。氧化铈-碳酸盐中的本征O2-和外源H+不同的离子传导特性导致不同的离子极化过程。采用交流阻抗谱在不同的气氛中的对欧姆阻抗的分析结果间接证实了混合的O2-/H+导电性。提出的类似Wagner直流极化证实了O2-和H+在复合电解质中的传导,方法也可能成为研究双金属耐磨复合管体系中多离子导电行为的普适方法。 The oxygen reduction activity of the bimetal wear-resistant composite tube was improved, and the cathode activity and the power density output of the single cell were also improved to a certain extent. The maximum power density of 859mWcm-2 was obtained at 600 C. The single cell with modified electrode remained stable during the constant external discharge of 5h. Different ion conduction characteristics of intrinsic O 2 - and exogenous H + in cerium oxide-carbonate lead to different ion polarization processes. The conductivity of the mixed O 2-/H+ was indirectly confirmed by the analysis of ohmic impedance in different atmospheres using AC impedance spectroscopy. The proposed Wagner-like DC polarization confirms the conduction of O 2-and H + in the composite electrolyte. This method may also be a universal method to study the conduction behavior of multi-ions in the bimetallic wear-resistant composite tube system. 添加10wt%活性Ag催化剂的双金属耐磨复合管材料降低Pr2NiO4电极的电荷转移和质量扩散阻抗,因此进一步提高了阴极的电催化活性。期望通过改善Ag浸渍工艺和组成获得更高的电化学性能。ZnO掺杂/复合后的锂化氧化镍颗粒变小、电导率降低,但直流极化测试结果证实复合电解质中O2-电导率相对单相材料被提高了。 Bimetallic wear-resistant composite tube material with 10wt% active Ag catalyst can reduce the charge transfer and mass diffusion impedance of Pr2NiO4 electrode, thus further improving the electrocatalytic activity of the cathode. It is expected that higher electrochemical performance can be obtained by improving the Ag impregnation process and composition. After doping and compounding of ZnO, the nickel lithium oxide particles become smaller and the conductivity decreases, but the DC polarization test results confirm that the conductivity of O 2 - in the composite electrolyte is higher than that of the single-phase material. H+电导率高于O2-的电导率。因此氧化铈-碳酸盐复合电解质在燃料电池气氛下的高离子导电率是混合O2-/H+导电的结果,也最终促成了低温下的高电化学性能。随着双金属耐磨复合管的发展,化工过程产生了大量的污染物,使得人类赖以生存的水资源无论在质量和数量上都在减少。有机染料的使用就是这样一个典型的污染水源的过程。有机染料具有着色强、稳定性好的特性,使得其废水处理的难度增大,水质污染也越来越严重。 The conductivity of H+ is higher than that of O2-. Therefore, the high ionic conductivity of cerium oxide-carbonate composite electrolyte in fuel cell atmosphere is the result of mixed O 2-/H + conductivity, and ultimately contributes to the high electrochemical performance at low temperature. With the development of wear-resistant bimetallic composite pipes, a large number of pollutants have been produced in the chemical process, which makes the water resources on which human beings depend are decreasing both in quality and quantity. The use of organic dyes is such a typical process of polluting water sources. Organic dyes have the characteristics of strong dyeing and good stability, which make it more difficult to treat wastewater and cause more and more serious water pollution. |
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