TY - JOUR
T1 - Electrocatalysis of oxygen reduction on carbon supported Ru-based catalysts in a polymer electrolyte fuel cell
AU - González-Huerta, R. G.
AU - Chávez-Carvayar, J. A.
AU - Solorza-Feria, O.
N1 - Funding Information:
This research project was financially supported by the National Science and Technology Council of Mexico, CONACyT, under Grant No. 41093. The authors wish to acknowledge to Carlos Flores M. for technical assistance. RGGH thanks CONACyT for doctoral fellowship.
PY - 2006/1/23
Y1 - 2006/1/23
N2 - Powder of nanosized particles of Ru-based (Rux, Ru xSey and RuxFeySez) clusters were prepared as catalysts for oxygen reduction in 0.5 M H 2SO4 and for fuel cells prepared by pyrolysis in organic solvent. These electrocatalysts show a high uniformity of agglomerated nanometric particles. The reaction kinetics were studied using rotating disk electrodes and an enhanced catalytic activity for the powders containing selenium and iron was observed. The Ru-based electrocatalysts were used as the cathode in a single prototype PEM fuel cell, which was prepared by spray deposition of the catalyst on the surface of Nafion® 117 membranes. The electrochemical performance of each single fuel cell was compared to that of a platinum/platinum conventional membrane electrode assembly (MEA), using hydrogen and oxygen feed streams. A maximum power density of 140 mW cm-2, at 80 °C with 460 mA cm-2 was obtained for the RuxFeySez catalysts; approximately 55% lower power density than that obtained with platinum.
AB - Powder of nanosized particles of Ru-based (Rux, Ru xSey and RuxFeySez) clusters were prepared as catalysts for oxygen reduction in 0.5 M H 2SO4 and for fuel cells prepared by pyrolysis in organic solvent. These electrocatalysts show a high uniformity of agglomerated nanometric particles. The reaction kinetics were studied using rotating disk electrodes and an enhanced catalytic activity for the powders containing selenium and iron was observed. The Ru-based electrocatalysts were used as the cathode in a single prototype PEM fuel cell, which was prepared by spray deposition of the catalyst on the surface of Nafion® 117 membranes. The electrochemical performance of each single fuel cell was compared to that of a platinum/platinum conventional membrane electrode assembly (MEA), using hydrogen and oxygen feed streams. A maximum power density of 140 mW cm-2, at 80 °C with 460 mA cm-2 was obtained for the RuxFeySez catalysts; approximately 55% lower power density than that obtained with platinum.
KW - Cathode
KW - Electrocatalysis
KW - Oxygen reduction
KW - PEMFC
KW - Ru-based cluster catalysts
UR - http://www.scopus.com/inward/record.url?scp=30144432785&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2005.03.188
DO - 10.1016/j.jpowsour.2005.03.188
M3 - Artículo
SN - 0378-7753
VL - 153
SP - 11
EP - 17
JO - Journal of Power Sources
JF - Journal of Power Sources
IS - 1
ER -