Highly active, durable and scalable fuel cell electrocatalysts are highly desirable but challenging. Herein, we first develop a novel catalyst of PtRu nanoalloys loaded on graphene modified anodic TiO₂ nanotubes arrays (TNTs) grown on flexible Ti wires (denoted as PtRu/RGO/TNTs). Electrodeposited reduced graphene oxide (RGO) is used to improve the electric conductivity and facilitate the dispersion of PtRu nanoparticles. TiO₂ nanotubes arrays could guarantee the large surface area, and PtRu nanoalloys are well-dispersed on the inner and external walls of the TNTs as well as the RGO surface, which could facilitate the fast mass transport and enhanced electrocatalytic activity. PtRu nanoalloys with intimate contact between the two metals is conductive to remove the harmful CO-like byproduct, resulting in superior tolerance to CO poisoning. In addition, this work first design and use the spirally flexible Ti wire electrode configuration in direct methanol fuel cell, which shows a highly efficient catalytic performance. Moreover, this kind of catalytic support is a strong candidate for other electrochemical energy conversion devices.

非常需要高活性，耐用和可扩展的燃料电池电催化剂，但是具有挑战性。本文中，我们首先开发了一种新型的PtRu纳米合金催化剂，该催化剂负载在柔性Ti线上生长的石墨烯修饰的阳极TiO ₂纳米管阵列（TNT）上（表示为PtRu / RGO / TNTs）。电沉积还原氧化石墨烯（RGO）用于提高电导率并促进PtRu纳米颗粒的分散。二氧化钛₂纳米管阵列可以确保较大的表面积，并且PtRu纳米合金很好地分散在TNTs的内壁和外壁以及RGO表面上，这可以促进快速的质量传输和增强的电催化活性。两种金属之间紧密接触的PtRu纳米合金具有导电性，可去除有害的类CO副产物，从而具有出色的CO中毒耐受性。此外，这项工作首先设计并在直接甲醇燃料电池中使用了螺旋柔性的钛丝电极构造，显示出高效的催化性能。而且，这种催化载体对于其他电化学能量转化装置是很强的候选者。