电沉积时间和基底对Pt-Ru催化甲醇氧化的影响

irect methanol fuel cells (DMFCs) are commercially attractive due to their significant advantages in handling, transportation, and fuels storage. Considering the slow kinetics of methanol oxidation reaction (MOR) at normal temperature, the exploration of effective anode catalysis is one of the most important challenges. In this paper, carbon paper (CP) and vertically oriented graphene (VG) are used as the support for Pt-Ru bimetallic catalysts. A repeated pulse potentials approach is applied in a conventional three-electrode electro-chemical system for the co-electrodeposition of Pt-Ru bimetallic nanoparticles. For comparison, different co- electrodeposition durations (80s and 160s) were applied to VG and CP, respectively. According to cyclic voltammetry (CV) tests, the catalysts for 80s present a significantly enhanced catalytic activity than the 160s counterpart, while the loading mass of 160s catalysts is about 2.5 times higher than that of the 80s catalysts. For the same co-electrodeposition duration, VG supports exhibit a 3 times higher catalyst mass loading, smaller nanoparticle size, and higher MOR activity and stability than pristine CP.