Palladium Nanoparticles Loaded on Carbon Modified TiO2 Nanobelts for Enhanced Methanol Electrooxidation

摘要

Carbon modified TiO2 nanobelts（TiO2-C） were synthesized using a hydrothermal growth method,as a support material for palladium（Pd） nanoparticles（Pd/TiO2-C） to improve the electrocatalytic performance for methanol electrooxidation by comparison to Pd nanoparticles on bare TiO2 nanobelts（Pd/TiO2）and activated carbon（Pd/AC）. Cyclic voltammetry characterization was conducted with respect to saturated calomel electrode（SCE） in an alkaline methanol solution, and the results indicate that the specific activity of Pd/TiO2-C is 2.2 times that of Pd/AC and 1.5 times that of Pd/TiO2. Chronoamperometry results revealed that the TiO2-C support was comparable in stability to activated carbon, but possesses an enhanced current density for methanol oxidation at a potential of -0.2 V vs. SCE. The current study demonstrates the potential of Pd nanoparticle loaded on hierarchical TiO2-C nanobelts for electrocatalytic applications such as fuel cells and batteries.