TITLE:
Cathodic Using of ZrB2-αSiC and TiB2-αSiC for PEM Electrolysis and Water Electrolysis at Low Temperature
AUTHORS:
Kafoumba Bamba, Nahossé Ziao
KEYWORDS:
Ceramic Pellets, HER, HOR, Polarization, Koutecky-Levich Plots
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.7 No.1,
January
15,
2016
ABSTRACT: 39 mol% SiC of ceramic
pellets ZrB2-αSiC and TiB2-αSiC were synthesized by the reactive
hot pressure RHP process at 1850°C under 40 Mpa in vacuum. The XR diffraction displays the absence of other reagents apart from ZrB2, SiC and TiB2 confirming the
purity of the pellets. The cathodic exploitation of both of them through electrochemical
study shows that TiB2-αSiC
is the most active for Hydrogen Evolution Reaction (HER) and Hydrogen Oxidation
Reaction (HOR) in 0.5 M of H2SO4 solution at room
temperature. Moreover, the kinetic exploitation shows that for both pellets the
system is controlled by mass transport when they are used as HER. However, in
the case of HOR, the system is controlled by the electron transfer.