Cathode catalyst layer has an important role on water management across the membrane electrode assembly (MEA). Effect of Pt percentage in commercial catalyst and Pt loading from the viewpoint of activity and water management on performance was investigated. Physical and electrochemical characteristics of conventional and hydrophobic catalyst layers were compared. Performance results revealed that power density of conventional catalyst layers (CLs) increased from 0.28 to 0.64 W/cm² at 0.45 V with the increase in Pt amount in commercial catalyst from 20% to 70% Pt/C for H₂/Air feed. In the case of H₂/O₂ feed, power density of CLs increased from 0.64 to 1.29 W/cm² at 0.45 V for conventional catalyst layers prepared with Tanaka. Increasing Pt load from 0.4 to 1.2 mg/cm², improved kinetic activity at low current density region in both feeding conditions. Scattering electron microscopy (SEM) images revealed that thickness of the catalyst layers (CLs) increases by increasing Pt load. Electrochemical impedance spectroscopy (EIS) results revealed that thinner CLs have lower charge transfer resistance than thicker CLs. Inclusion of 30 wt % Polytetrafluoroethylene (PTFE) nanoparticles in catalyst ink enhanced cell performance for the electrodes manufactured with 20% Pt/C at higher current densities. However, in the case of 70% Pt/C, performance enhancement was not observed. Cyclic voltammetry (CV) results revealed that 20% Pt/C had higher (77 m²/g) electrochemical surface area (ESA) than 70% Pt/C (65 m²/g). In terms of hydrophobic powders, ESA of 30PTFE prepared with 70% Pt/C was higher than 30PTFE prepared with 20 %Pt/C. X-Ray Diffractometer (XRD) results showed that diameter of Pt particles of 20% Pt/C was 2.5 nm, whereas, it was 3.5 nm for 70% Pt/C, which confirms CV results. Nitrogen physisorption results revealed that primary pores of hydrophobic catalyst powder prepared with 70% Pt/C was almost filled (99%) with Nafion and PTFE.

阴极催化剂层对跨膜电极组件（MEA）的水管理起着重要作用。从活性和水分管理的角度研究了工业催化剂中Pt百分含量和Pt负载量对性能的影响。比较了常规和疏水催化剂层的物理和电化学特性。性能结果表明，传统催化剂层（CLs）的功率密度在0.45 V时从0.28 W / cm ²增加到0.64 W / cm ²，对于H ₂ /空气进料，商业催化剂中Pt的含量从20％Pt / C增加到70％。对于H ₂ / O ₂进料，CL的功率密度从0.64提高到1.29 W / cm ²田中制得的常规催化剂层在0.45 V下的电压为0.45 V 将Pt负载从0.4增加到1.2 mg / cm ²，在两种进料条件下在低电流密度区域都改善了动力学活性。散射电子显微镜（SEM）图像显示，催化剂层（CLs）的厚度通过增加Pt负载而增加。电化学阻抗谱（EIS）结果表明，较薄的CL较较厚的CL具有较低的电荷转移电阻。催化剂墨水中包含30 wt％的聚四氟乙烯（PTFE）纳米颗粒增强了以20％Pt / C在较高电流密度下制造的电极的电池性能。但是，在Pt / C为70％的情况下，未观察到性能增强。循环伏安法（CV）结果显示20％Pt / C更高（77 m ²/ g）的电化学表面积（ESA）大于70％Pt / C（65 m ² / g）。就疏水性粉末而言，用70％Pt / C制备的30PTFE的ESA高于用20％Pt / C制备的30PTFE。X射线衍射仪（XRD）结果表明，20％Pt / C的Pt颗粒直径为2.5 nm，而70％Pt / C的直径为3.5 nm，这证实了CV结果。氮的物理吸附结果表明，用70％Pt / C制备的疏水性催化剂粉末的主要孔几乎被Nafion和PTFE填充（99％）。