A series of Pt/C catalysts for proton exchange membrane fuel cells (PEMFCs) with various metal loadings is synthesized by a microwave-assisted polyol process via mixing an extremely stable platinum colloid (> 3 months’ shelf life) from single batch preparation with activated carbon ethylene glycol suspension. 21 wt%, 42 wt% and 61 wt% Pt loadings are employed to showcase the advantages of the improved polyol process. The ultraviolet (UV)–visible spectra and ζ-potential measurements are conducted to monitor the wet chemistry process during catalyst preparation. The powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA) characterizations are carried out on catalysts. The catalyst activities are investigated using electrochemical and single cell tests. The stability of Pt nanoparticle colloid is explored by ORR, cyclic voltammetry (CV) and ζ-potential measurements. The TEM results show the Pt particle sizes of the colloid, and the sizes of the 21 wt%, 42 wt% and 61 wt% Pt/C samples are 2.1–3.9 nm. Because of the high Pt dispersion, the Pt/C catalysts exhibit superior electroactivity toward ORR. In addition, four 61 wt% Pt/C catalysts made from the Pt colloid with 0–3 months’ shelf life show almost the same performance, which exhibits superior stability of the Pt colloid system without surfactant protection.

用于质子交换膜燃料电池（ PEMFC ）的一系列Pt / C催化剂通过微波辅助多元醇工艺，将单批制备的极其稳定的铂胶体（保质期> 3个月）与活性炭乙二醇悬浮液混合，可以合成出具有多种金属负载量的产品。采用21重量％，42重量％和61重量％的Pt负载量来展示改进的多元醇方法的优点。进行紫外线（UV）可见光谱和ζ电位测量，以监测催化剂制备过程中的湿化学过程。粉末X射线衍射（XRD），透射电子显微镜（TEM）和热重分析（TGA）表征是在催化剂上进行的。使用电化学和单电池测试研究催化剂的活性。通过ORR，循环伏安法（CV）和ζ电位测量来探索Pt纳米粒子胶体的稳定性。TEM结果显示，胶体的Pt粒径为21％，42％和61％（重量）的Pt / C样品为2.1–3.9 nm。由于Pt分散度高，Pt / C催化剂对ORR表现出优异的电活性。此外，四种由Pt胶体制成的61 wt％Pt / C催化剂具有0–3个月的保质期，显示出几乎相同的性能，在没有表面活性剂保护的情况下，表现出Pt胶体系统优异的稳定性。