Compared to Pt nanoparticles, Pt metal nanotubes (NTs) with hollow nanostructures and ultrathin side walls can greatly increase electrocatalytic activity and stability in oxygen reduction reaction (ORR). In this work, the large-diameter ternary TePtCo NT with a hollow and hierarchical structure is successfully prepared by a simple and cost-effective replacement way. The formed TePtCo NT not only proves the high Pt utilization with large surface area, but also improves the proton transfer in the ORR process. As expected, its specific activity and mass activity at 0.9 V (vs. RHE) are 4.6 folds and 3.9 folds over that of the commercial Pt/C catalyst, respectively. Moreover, it also shows an excellent catalytic stability, much higher than that of Pt/C. The density functional theory (DFT) calculation results reveal that Pt alloying with Te and Co facilitates the breakage of the OO bond and weakens the adsorption energy of hydroxyl, subsequently enhancing the ORR performance.

与Pt纳米颗粒相比，具有空心纳米结构和超薄侧壁的Pt金属纳米管（NTs）可以大大提高电催化活性和氧还原反应（ORR）的稳定性。在这项工作中，通过简单且经济高效的替换方法成功制备了具有空心且分层结构的大直径三元TePtCo NT。形成的TePtCo NT不仅证明了Pt的利用率高，表面积大，而且还改善了ORR过程中的质子转移。如所期望的，其在0.9V（vs.RHE）下的比活性和质量活性分别是市售Pt / C催化剂的4.6倍和3.9倍。此外，它还显示出极好的催化稳定性，远高于Pt / C。O键可削弱羟基的吸附能，从而增强ORR性能。