H. Dumont et al., ELECTROCATALYTIC PERFORMANCE OF LANTHANUM PHOSPHATE-BONDED POROUS-ELECTRODES FOR THE HYDROGEN EVOLUTION REACTION IN 30WT-PERCENT ALKALINE-SOLUTION, International journal of hydrogen energy, 18(9), 1993, pp. 719-725
Citations number
26
Categorie Soggetti
Energy & Fuels","Environmental Sciences","Physics, Atomic, Molecular & Chemical
The electrocatalytic properties of lanthanum phosphate-bonded nickel p
owder (LPBN), LPBN-ruthenium and LPBN-rhodium electrodes were investig
ated for the hydrogen evolution reaction (HER) in 30wt% alkaline solut
ion at 70-degrees-C. The kinetic parameters of the HER were determined
by the steady-state polarization curve method. The influence of disso
lved metallic impurities such as iron and heavy metals on the electroc
atalytic activity of different types of LPBN electrodes was considered
. Long-term performance tests were conducted in 30wt% alkaline solutio
ns at 70-degrees-C by applying a current density of 375 mA cm-2 during
210 h, followed by 24 h at open circuit potential, then reapplying th
e same current density. The effect of long-term experiments on the cat
hode morphology was investigated by SEM and X-Tay fluorescence methods
. Heavy metal deposition had only little effect on the highly porous L
PBN, LPBN-Ru, and LPBN-Rh electrodes, especially on the most active of
these, and a stable performance toward the HER was obtained.