As a novel method for the preparation of highly-active anode catalysts for direct methanol fuel cells (DMFCs), the effect of high-energy ion irradiation on the CeO₂ embedded carbon nanofiber support (CECNF) of the PtRu/CECNF catalyst, that has been reported as a very active catalyst, on the methanol oxidation activity as well as the crystalline structure of the support materials were investigated. PtRu/CECNFs were prepared using the CECNFs that were irradiated by high-energy ion-beams under the different conditions, i.e., using 127 MeV Ar ions, 310 MeV Kr ions and 350 MeV Xe ions with different ion-fluences from 5 × 10¹¹ ions cm^-2 to 1 × 10¹³ ions cm^-2. A change in the activity was observed at the low electrode potentials below 0.7 V vs RHE. An almost two times higher current density at 0.6 V vs RHE compared to that without irradiation was obtained by the Ar ion irradiation with the ion-fluence at around 5 × 10¹¹ ions cm^-2, while a higher ion-fluence reduced the activity. The reduction of the CeO₂ crystalline size with the increase in the ion-fluence was observed by XRD measurements. The change in the catalytic activity roughly correlated with the increase in the lattice distance of CeO₂ suggesting that the generated oxygen atom vacancies enhanced the activity.

作为制备直接甲醇燃料电池（DMFC）高活性阳极催化剂的一种新方法，高能离子辐照对PtRu / CECNF催化剂的CeO ₂嵌入的碳纳米纤维载体（CECNF）的影响据报道，作为一种非常活泼的催化剂，对甲醇的氧化活性以及载体材料的晶体结构进行了研究。使用在不同条件下用高能离子束辐照的CECNFs制备PtRu / CECNFs，即使用127 MeV Ar离子，310 MeV Kr离子和350 MeV Xe离子，离子通量从5×10 ^11起。离子cm ^-2至1×10 ¹³离子cm ^-2。在相对于RHE低于0.7 V的低电极电势下观察到活性的变化。通过在5×10 ¹¹离子cm ^-2附近进行离子通量的Ar离子辐照，在0.6 V vs. RHE的电流密度下，与未辐照相比，其电流密度几乎高出两倍。而更高的离子通量则降低了活性。通过XRD测量观察到随着离子通量的增加，CeO ₂晶体尺寸减小。催化活性的变化与CeO ₂的晶格距离的增加大致相关，表明所产生的氧原子空位增强了活性。