TY - JOUR
T1 - Synchrotron-based structural and spectroscopic studies of ball milled RuSeMo and RuSnMo particles as oxygen reduction electrocatalyst for PEM fuel cells
AU - Suarez-Alcantara, K.
AU - Ezeta-Mejia, A.
AU - Ortega-Avilés, M.
AU - Haase, D.
AU - Arce-Estrada, E.
AU - Gonzalez-Huerta, R. G.
AU - Solorza-Feria, O.
AU - Canton, S. E.
N1 - Publisher Copyright:
© 2014 Hydrogen Energy Publications, LLC.
PY - 2014/10/2
Y1 - 2014/10/2
N2 - Particles of RuSeMo and RuSnMo have been produced by ball milling; they present catalytic activity towards the oxygen reduction reaction (ORR) in acid media. A Tafel slope close to 120 mV/dec was found for both materials. Their morphology was first characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM and TEM images reveal particles in the sub-micrometer range. The structure of the materials was further probed with synchrotron radiation powder X-ray diffraction (SR-PXD) and X-ray absorption spectroscopy (XAS). SR-PXD reveals the existence of metallic Ru as the main phase and the formation of phases such as RuSe2 in RuSeMo and Ru3Sn7 in RuSnMo. Mo was found to form solid solution into the RuSe2 phase in ball milled RuSeMo. Finally, The Ru L3-edge and Mo L3-edge XAS fingerprints were correlated with the catalytic activity towards ORR.
AB - Particles of RuSeMo and RuSnMo have been produced by ball milling; they present catalytic activity towards the oxygen reduction reaction (ORR) in acid media. A Tafel slope close to 120 mV/dec was found for both materials. Their morphology was first characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM and TEM images reveal particles in the sub-micrometer range. The structure of the materials was further probed with synchrotron radiation powder X-ray diffraction (SR-PXD) and X-ray absorption spectroscopy (XAS). SR-PXD reveals the existence of metallic Ru as the main phase and the formation of phases such as RuSe2 in RuSeMo and Ru3Sn7 in RuSnMo. Mo was found to form solid solution into the RuSe2 phase in ball milled RuSeMo. Finally, The Ru L3-edge and Mo L3-edge XAS fingerprints were correlated with the catalytic activity towards ORR.
KW - Ruthenium particles Electrocatalyst Fuel cells Synchrotron radiation
UR - http://www.scopus.com/inward/record.url?scp=84907746237&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2014.03.220
DO - 10.1016/j.ijhydene.2014.03.220
M3 - Artículo
AN - SCOPUS:84907746237
SN - 0360-3199
VL - 39
SP - 16715
EP - 16721
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 29
ER -