Activity of a novel titanium-supported bimetallic PtSn/Ti electrode for electrocatalytic oxidation of formic acid and methanol

作者：Yi, Qingfeng^*; Zhang, Jingjing; Chen, Aicheng; Liu, Xiaoping; Xu, Guorong; Zhou, Zhihua

来源：Journal of Applied Electrochemistry, 2008, 38(5): 695-701.

DOI：10.1007/s10800-008-9490-x

• bimetallic PtSn
• formic acid oxidation
• methanol oxidation
• titanium substrate

Bimetallic platinum-tin nanoparticles were co-deposited on a titanium surface using a simple one step hydrothermal method process. The electrochemical catalytic activity of this titanium-supported nanoPtSn/Ti electrode towards the oxidation of formic acid and methanol in 0.5 M H2SO4 was evaluated by voltammetric techniques, chronoamperometric responses and electrochemical impedance spectra (EIS). According to the cyclic voltammograms of the oxidation of both formic acid and methanol, the nanoPtSn/Ti presents high anodic current densities and low onset potentials. Potential-time transient measurements show that the nanoPtSn/Ti exhibits high steady-state current densities for the oxidation of both formic acid and methanol. The EIS data indicate that the nanoPtSn/Ti presents very low electrochemical impedance values, showing that for the oxidation of both formic acid and methanol, low charge transfer resistances are present on the nanoPtSn/Ti catalyst. This confirms the high electrocatalytic activity of the nanoPtSn/Ti for the formic acid and methanol oxidation.

• 出版日期2008-5
• 单位岭南师范学院; 湖南科技大学