In this work, dual-doped TiO₂ was successfully synthesized by using tungsten or niobium as the cation and nitrogen as the anion and, as compared with single-doped TiO₂, provided a higher electron conductivity and improved physical properties. Platinum (Pt) nanoparticles loaded on these materials showed better electrochemical performance, and the Pt/Ti_0.9Nb_0.1N_xO_y and Pt/Ti_0.8W_0.2N_xO_y catalysts were 2.6–3.7 times more active than the Pt/Ti_0.9Nb_0.1O_y and Pt/Ti_0.8W_0.2O_y catalysts without nitrogen doping. Additionally, there was an activity loss of 22.9% as compared with 81% in Pt/C after 30 000 cyclic voltammetry cycles, a value exceeding the US Department of Energy (DOE) stability target. Dual doping not only enhances the electron conductivity but also changes the electronic state of Pt on the support materials, thus allowing for more active and stable catalysts. Both X-ray absorption spectroscopy (XAS) and density functional theory (DFT) studies were undertaken to demonstrate how defect formation affects the interactions between Pt and the single- or dual-doped TiO₂ supports and manipulates the physical and chemical properties of the resulting catalysts. Thus, these catalytic supports are strong candidates for proton exchange membrane fuel cell applications.

在这项工作中，以钨或铌为阳离子，以氮为阴离子成功地合成了双掺杂的TiO ₂，与单掺杂的TiO ₂相比，它具有更高的电子电导率和改善的物理性能。负载在这些材料上的铂（Pt）纳米颗粒表现出更好的电化学性能，并且Pt / Ti _0.9 Nb _0.1 N _x O _y和Pt / Ti _0.8 W _0.2 N _x O _y催化剂的活性是Pt / Ti的2.6-3.7倍_0.9 Nb _0.1 O _y和Pt / Ti _0.8 W _0.2没有氮掺杂的O _y催化剂。此外，经过3万次循环伏安循环后，Pt / C的活性损失为22.9％，而Pt / C的活性损失为81％，超过了美国能源部（DOE）稳定目标。双重掺杂不仅可以增强电子传导性，还可以改变载体材料上Pt的电子状态，从而获得更具活性和稳定性的催化剂。进行了X射线吸收光谱（XAS）和密度泛函理论（DFT）研究，以证明缺陷形成如何影响Pt与单掺杂或双掺杂TiO ₂之间的相互作用。支持并控制所得催化剂的物理和化学性质。因此，这些催化载体是质子交换膜燃料电池应用的强候选。