Methanol electrooxidation at mesoporous Pt and Pt-Ru electrodes: A comparative study with carbon supported materials |
| |
| Authors: | Gonzalo GarcíaJonathan Florez-Montaño Alberto Hernandez-CreusElena Pastor Gabriel A Planes |
| |
| Affiliation: | a Departamento de Química Física, Instituto Universitario de Materiales y Nanotecnología, Universidad de La Laguna, Astrofísico F. Sánchez s/n, 38071 La Laguna, Tenerife, Spain
b Departamento de Química, Universidad Nacional de Río Cuarto, Agencia Postal 3, 5800 Río Cuarto, Argentina |
| |
| Abstract: | The electrochemical behaviour of fuel cell catalysts (mesoporous Pt (MPPt), MPPtRu, MPPt modified by adsorbed Ru (MPPt/Ru) and carbon supported PtRu alloy) was studied using the thin layer flow cell differential electrochemical mass spectrometry (TLFC-DEMS) technique. The catalysts present high catalytic activity towards the methanol oxidation reaction (MOR), being the PtRu/C electrode the least active for MOR, while MPPt/Ru presents higher current densities for this reaction than MPPtRu. The results suggest that the diffusion properties obtained in the porous structure of the MP electrodes and the surface atomic arrangement in the electrode are the main reasons for the higher catalytic activity achieved. Finally, TLFC-DEMS was proved to be a powerful technique which evaluates and correlates the CO2 efficiency with the catalytic activity and the porous structure of the catalysts. |
| |
| Keywords: | Mesoporous materials Micro fuel cells PtRu DEMS Methanol electrooxidation CO electrooxidation |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
