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ID: 207979.0, MPI für Dynamik komplexer technischer Systeme / Physical and Chemical Process Engineering
PtRu Methanol Fuel Cell Catalysts : Influence of Synthetic Procedures
Authors:Vidakovic, T.; Christov, M.; Sundmacher, K.; Bönnemann, H.
Language:English
Date of Publication (YYYY-MM-DD):2004
Title of Proceedings:13th International Congress on Catalysis : Catalysis and 21st Century challenges: basic research and the needs of society : Book of Abstracts : Vol. 2
Start Page:195
Name of Conference/Meeting:13th International Congress on Catalysis : Catalysis and 21st Century challenges: basic research and the needs of society
Place of Conference/Meeting:Paris, France
(Start) Date of Conference/Meeting
 (YYYY-MM-DD):
2004-07-11
End Date of Conference/Meeting 
 (YYYY-MM-DD):
2004-07-16
Review Status:not specified
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:Electrochemical oxidation of methanol is a complex process, which involves many adsorbed intermediates. PtRu is considered to be the best catalyst for methanol oxidation. The apparent activity of PtRu catalyst of the same nominal composition was found to be synthetic sensitive- particle size, catalyst morphology, surface composition, etc. play a significant role. Catalysts synthesized by three different methods were investigated in membrane electrode assembly simulating fuel cell environment. The catalysts were examined by cyclic voltammetry in absence of methanol and the activity for methanol oxidation was tested by steady-state and electrochemical impedance measurements at two temperatures. Two of the catalysts exhibit almost the same behaviour (Tafel slopes about 120 mV and appearance of limiting current at higher potentials), while the third one, with much less activity, has a greater Tafel slope without reaching limiting current behaviour. The impedance data give additional data about the reaction resistance.
External Publication Status:published
Document Type:Conference-Paper
Communicated by:Kai Sundmacher
Affiliations:MPI für Dynamik komplexer technischer Systeme/Physical and Chemical Process Engineering
Identifiers:URL:http://www.13icc.jussieu.fr/
LOCALID:926
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