High durable activity binary alloy Pt-Ti thin film electrocatalyst

PtTi catalysts with particle size distribution of 8.3−12.5 nm and Pt loading capacity of 0.1 mg/cm² were prepared by ultra-high vacuum dual-target co-sputtering system, and ultra-pure target as raw material. The structure, catalytic activity and durability of the prepared PtTi catalysts were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM), durability pressure test (DST) and chronocurrent (I-t) methods, and the effect of the addition amount of Ti on the electrocatalytic performance of Pt-based alloy catalysts was investigated. The results show that the highest electrochemical active area (ECSA) is 186.14 m²/g, and after in-situ annealing at 600 ℃, the peak current density of direct-ethanol catalytic oxidation is 1448 A/g, and the stable current density value of 1100 s is 147.47 A/g, the attenuation rate of 3000 durability stress tests is 8.6%. The catalytic electrode studied in this work has excellent catalytic activity and high stability characteristics. It can be applied to the use of direct ethanol fuel cell electrodes and has extremely high application potential.