TY - JOUR
T1 - Pt-M (M = Fe, Co, Ni and Cu) electrocatalysts synthesized by an aqueous route for proton exchange membrane fuel cells
AU - Xiong, L.
AU - Kannan, A. M.
AU - Manthiram, A.
N1 - Funding Information:
This work was supported by the Welch Foundation Grant F-1254 and the Office of Naval Research through the Electric Ship Research and Development Consortium.
PY - 2002/11/1
Y1 - 2002/11/1
N2 - Nanostructured Pt-M (M = Fe, Co, Ni, and Cu) alloy catalysts synthesized by a low temperature (70 °C) reduction procedure with sodium formate in aqueous medium have been investigated for oxygen reduction in sulfuric acid and as cathodes in single proton exchange membrane fuel cells (PEMFC). The Pt-M alloy catalysts show improved catalytic activity towards oxygen reduction compared to pure platinum. Among the various alloy catalysts investigated, the Pt-Co catalyst shows the best performance with the maximum catalytic activity and minimum polarization occurring at a Pt:Co atomic ratio of around 1:7. While mild heat treatments at moderate temperatures (200 °C) improve the catalytic activity due to a cleaning of the surface oxides, annealing at elevated temperatures (900 °C) degrade the activity due to an increase in particle size.
AB - Nanostructured Pt-M (M = Fe, Co, Ni, and Cu) alloy catalysts synthesized by a low temperature (70 °C) reduction procedure with sodium formate in aqueous medium have been investigated for oxygen reduction in sulfuric acid and as cathodes in single proton exchange membrane fuel cells (PEMFC). The Pt-M alloy catalysts show improved catalytic activity towards oxygen reduction compared to pure platinum. Among the various alloy catalysts investigated, the Pt-Co catalyst shows the best performance with the maximum catalytic activity and minimum polarization occurring at a Pt:Co atomic ratio of around 1:7. While mild heat treatments at moderate temperatures (200 °C) improve the catalytic activity due to a cleaning of the surface oxides, annealing at elevated temperatures (900 °C) degrade the activity due to an increase in particle size.
KW - Galvanostatic polarization
KW - Oxygen reduction
KW - Platinum alloy catalysts
KW - Proton exchange membrane fuel cells
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U2 - 10.1016/S1388-2481(02)00485-X
DO - 10.1016/S1388-2481(02)00485-X
M3 - Article
AN - SCOPUS:0036849896
SN - 1388-2481
VL - 4
SP - 898
EP - 903
JO - Electrochemistry Communications
JF - Electrochemistry Communications
IS - 11
ER -