High performance mesoporous Pt electrode for methanol electrooxidation.: A DEMS study

Electrodeposited mesoporous (MP) Pt electrodes were evaluated as catalysts for CO and methanol electrooxidation. Electrochemical analysis reveals a mass activity of 41 Ag-1 at 0.55 V in 1 M CH3OH, similar to carbon supported catalysts. However, the high current densities are related to low CO, conversion efficiencies, as was established by using differential electrochemical mass spectrometry in a thin layer flow cell configuration (TLFC-DEMS). These results can be understood taking into account the especially accessible porous structure of the MP Pt, where the possibility of readsorption of partially oxidized products is low. (c) 2006 Elsevier B.V. All rights reserved.