TY - GEN
T1 - Electrocatalytic activity of nano-crystalline Ni-Co-Mo-Fe alloys on the Oxygen Evolution Reaction (OER)
AU - Domínguez-Crespo, M. A.
AU - Plata-Torres, M.
AU - Torres-Huerta, A. M.
AU - Ramírez-Rodríguez, C.
AU - Arce-Estrada, E. M.
PY - 2006
Y1 - 2006
N2 - The electrocatalytic behavior of nanocrystalline Co30Ni 70, Co40Mo60, Ni40Mo60, Co15Ni30Mo55, Fe10Co 35Ni55 and Co15Fe30Ni55 mol-% alloys on the oxygen evolution reaction [OER] in a 30 wt-% KOH aqueous solution at 298, 323 and 343 K has been assessed in this work. Appreciable currents for oxygen evolution reactions were measured at Ni-Co-Mo-Fe electrodes produce by this technique. It was also found that iron increased the electrocatalytic activity for oxygen evolution reaction, but it was not as good as obtained on hydrogen evolution reaction [HER]. Tafel plots of preoxidized and prolonged cycled Co30Ni70, Co40Mo 60, Ni40Mo60, Co15Ni 30Mo55, Fe10Co35Ni55 and Co15Fe30Ni55 crystalline electrodes were very different, which might be related to changes in the surface enrichment of one or two of the alloy constituents. The electrocatalytic effects Mo seem to be more important on the OER at high temperatures than those showed previously for HER. Nickel and Molybdenum rich alloys showed particularly high activity towards the OER in comparison with their nanocrystalline counterparts. copyright The Electrochemical Society.
AB - The electrocatalytic behavior of nanocrystalline Co30Ni 70, Co40Mo60, Ni40Mo60, Co15Ni30Mo55, Fe10Co 35Ni55 and Co15Fe30Ni55 mol-% alloys on the oxygen evolution reaction [OER] in a 30 wt-% KOH aqueous solution at 298, 323 and 343 K has been assessed in this work. Appreciable currents for oxygen evolution reactions were measured at Ni-Co-Mo-Fe electrodes produce by this technique. It was also found that iron increased the electrocatalytic activity for oxygen evolution reaction, but it was not as good as obtained on hydrogen evolution reaction [HER]. Tafel plots of preoxidized and prolonged cycled Co30Ni70, Co40Mo 60, Ni40Mo60, Co15Ni 30Mo55, Fe10Co35Ni55 and Co15Fe30Ni55 crystalline electrodes were very different, which might be related to changes in the surface enrichment of one or two of the alloy constituents. The electrocatalytic effects Mo seem to be more important on the OER at high temperatures than those showed previously for HER. Nickel and Molybdenum rich alloys showed particularly high activity towards the OER in comparison with their nanocrystalline counterparts. copyright The Electrochemical Society.
UR - http://www.scopus.com/inward/record.url?scp=33847611911&partnerID=8YFLogxK
U2 - 10.1149/1.2357105
DO - 10.1149/1.2357105
M3 - Contribución a la conferencia
AN - SCOPUS:33847611911
SN - 1566775094
SN - 9781566775090
T3 - ECS Transactions
SP - 135
EP - 148
BT - Nanostructured Metal Oxides
PB - Electrochemical Society Inc.
T2 - Nanostructured Metal Oxides: Processing and Applications - 210th Electrochemical Society Meeting
Y2 - 29 October 2006 through 3 November 2006
ER -