TY - JOUR
T1 - Understanding the surface state and proton adsorption phenomena on ni-based alloys at the hydrogen evolution zone in alkaline medium by EIS-XPS
AU - Oliver-Tolentino, Miguel A.
AU - Cabrera-Sierra, Roman
AU - Lartundo-Rojas, Luis
AU - Lucero-Guerrero, J.
AU - Sotelo-Boyas, R.
AU - Manzo-Robledo, Arturo
PY - 2013
Y1 - 2013
N2 - In this work, well-defined Ni-based alloys, labeled M1 (Ni 0.8CoO0.1Zn0.05MnO0.02Ti 0.01Y0.01Al0.01) and M2 (NiO 0.8CoO0.1Zn0.05MnO0.02Ti 0.01Y0.01Al0.01), were prepared by ball-milling technique and used as electrodes for the generation of hydrogen. Electrochemical Impedance Spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS) were employed in order to understand the surface state and proton adsorption phenomena during cathodic polarization. It was found that high concentration species such as NiO and/or Ni(OH)2 induces passivation effect, suppressing the HER by increasing the electrode resistance. The charge transfer, double layer capacitance and adsorption of protons toward the electrode interface ware found to be highly controlled by the intrinsic nature of the alloy in turn.
AB - In this work, well-defined Ni-based alloys, labeled M1 (Ni 0.8CoO0.1Zn0.05MnO0.02Ti 0.01Y0.01Al0.01) and M2 (NiO 0.8CoO0.1Zn0.05MnO0.02Ti 0.01Y0.01Al0.01), were prepared by ball-milling technique and used as electrodes for the generation of hydrogen. Electrochemical Impedance Spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS) were employed in order to understand the surface state and proton adsorption phenomena during cathodic polarization. It was found that high concentration species such as NiO and/or Ni(OH)2 induces passivation effect, suppressing the HER by increasing the electrode resistance. The charge transfer, double layer capacitance and adsorption of protons toward the electrode interface ware found to be highly controlled by the intrinsic nature of the alloy in turn.
KW - Electrocatalysis
KW - Mechanical milling
KW - Metal hydrides
KW - Passivation
KW - Proton adsorption
UR - http://www.scopus.com/inward/record.url?scp=84886885611&partnerID=8YFLogxK
U2 - 10.14447/jnmes.v16i3.9
DO - 10.14447/jnmes.v16i3.9
M3 - Artículo
SN - 1480-2422
VL - 16
SP - 183
EP - 188
JO - Journal of New Materials for Electrochemical Systems
JF - Journal of New Materials for Electrochemical Systems
IS - 3
ER -