TY - JOUR
T1 - Influence of cobalt on electrocatalytic water splitting in NiCoFe layered double hydroxides
AU - Guzmán-Vargas, Ariel
AU - Vazquez-Samperio, Juvencio
AU - Oliver-Tolentino, Miguel A.
AU - Nava, Noel
AU - Castillo, Nancy
AU - Macías-Hernández, Manuel J.
AU - Reguera, E.
N1 - Publisher Copyright:
© 2017, Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - NiCoFe layered mixed hydroxides containing same iron composition, but Co/Ni ratios of 1:1, 2:1 and 1:2 were prepared by co-precipitation method and evaluated according to their performance for electrochemical oxygen evolution reaction (OER) or water splitting process. Crystalline phase without impurities was verified by XRD, FTIR, TEM and Mössbauer techniques. From Tafel plots, values of 65 and 110 mV dec−1 at low and high potential, respectively, were obtained; all electrocatalysts showed lower overpotentials around 265 mV, and sample Ni3Co3Fe3 with equimolar composition ratio exhibited the best performance (lowest overpotential 250 mV). Cobalt in low-spin configuration has effect on the electronic properties of brucite layer sheet, modulating the necessary potential for nickel oxidation which acts as active site for water splitting.
AB - NiCoFe layered mixed hydroxides containing same iron composition, but Co/Ni ratios of 1:1, 2:1 and 1:2 were prepared by co-precipitation method and evaluated according to their performance for electrochemical oxygen evolution reaction (OER) or water splitting process. Crystalline phase without impurities was verified by XRD, FTIR, TEM and Mössbauer techniques. From Tafel plots, values of 65 and 110 mV dec−1 at low and high potential, respectively, were obtained; all electrocatalysts showed lower overpotentials around 265 mV, and sample Ni3Co3Fe3 with equimolar composition ratio exhibited the best performance (lowest overpotential 250 mV). Cobalt in low-spin configuration has effect on the electronic properties of brucite layer sheet, modulating the necessary potential for nickel oxidation which acts as active site for water splitting.
UR - http://www.scopus.com/inward/record.url?scp=85037615907&partnerID=8YFLogxK
U2 - 10.1007/s10853-017-1882-z
DO - 10.1007/s10853-017-1882-z
M3 - Artículo
SN - 0022-2461
VL - 53
SP - 4515
EP - 4526
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 6
ER -