TY - CHAP
T1 - Efficient oxygen evolution reaction catalysts for cell reversal and start/stop tolerance
AU - Atanasoski, Radoslav T.
AU - Atanasoska, Ljiljana L.
AU - Cullen, David A.
PY - 2013
Y1 - 2013
N2 - Minute amounts of ruthenium and iridium on platinum nanostructured thin films have been evaluated in an effort to reduce carbon corrosion and Pt dissolution during transient conditions in proton exchange membrane fuel cells. Electrochemical tests showed the catalysts had a remarkable oxygen evolution reaction (OER) activity, even greater than that of bulk, metallic thin films. Stability tests within a fuel cell environment showed that rapid Ru dissolution could be managed with the addition of Ir. Membrane electrode assemblies containing a Ru to Ir atomic ratio of 1:9 were evaluated under start-up/shutdown and cell reversal conditions for OER catalyst loadings ranging from 1 to 10 μg/cm2. These tests affirmed that electrode potentials can be controlled through the addition of OER catalysts without impacting the oxygen reduction reaction on the cathode or the hydrogen oxidation reaction on the anode. The morphology and chemical structure of the thin OER layers were characterized by scanning transmission electron microscopy and X-ray photoelectron spectroscopy in an effort to establish a correlation between interfacial properties and electrochemical behavior.
AB - Minute amounts of ruthenium and iridium on platinum nanostructured thin films have been evaluated in an effort to reduce carbon corrosion and Pt dissolution during transient conditions in proton exchange membrane fuel cells. Electrochemical tests showed the catalysts had a remarkable oxygen evolution reaction (OER) activity, even greater than that of bulk, metallic thin films. Stability tests within a fuel cell environment showed that rapid Ru dissolution could be managed with the addition of Ir. Membrane electrode assemblies containing a Ru to Ir atomic ratio of 1:9 were evaluated under start-up/shutdown and cell reversal conditions for OER catalyst loadings ranging from 1 to 10 μg/cm2. These tests affirmed that electrode potentials can be controlled through the addition of OER catalysts without impacting the oxygen reduction reaction on the cathode or the hydrogen oxidation reaction on the anode. The morphology and chemical structure of the thin OER layers were characterized by scanning transmission electron microscopy and X-ray photoelectron spectroscopy in an effort to establish a correlation between interfacial properties and electrochemical behavior.
UR - http://www.scopus.com/inward/record.url?scp=84883030717&partnerID=8YFLogxK
U2 - 10.1007/978-1-4471-4911-8_22
DO - 10.1007/978-1-4471-4911-8_22
M3 - Chapter
AN - SCOPUS:84883030717
SN - 9781447149101
T3 - Lecture Notes in Energy
SP - 637
EP - 663
BT - Electrocatalysis in Fuel Cells
A2 - Shao, Minhua
ER -
