Abstract:
The electrochemical water splitting is well-thought-out as a clean source to produce
water splitting and for the use of different energy applications. But there is a still
problem is present to produce the hydrogen on the large scale, the problem is mainly
concern with the stability and efficiency of the electrocatalysts and also in Hydrogen
Evolution Reaction in acidic media as well as different kinetics and values of high
overpotential of four-electron transfer Oxygen Evolution Reaction OER. Thus, this
research based on electrocatalysts that helps to reduce the overpotential for the
OER/HER. The synthesis of double perovskites electrocatalysts for high stability and
the effective activity towards electrolysis of water was important for the production of
hydrogen. In this study, pure (Sr2TiFO6) STF based double perovskites and STF/Pr
doped electrocatalysts by doping the rare earth metal praseodymium Pr at A-site and
B-site were made by sol-gel method. The Sr2TiFO6 (STF) based electrocatalysts was
characterized by XRD, SEM and FTIR and electrochemical performance was analyzed
by using 3-electrode testing in alkaline media. The results of STF Sr2TiFO6 (STF)
based double perovskites towards OER (Oxygen Evolution Reaction) and HER
(Hydrogen Evolution Reaction) was very remarkable. The OER results showed
overpotential of 230 at current density of 10mA/cm2
and Tafel slope was 139 mV dec1
. For HER, there was overpotential of 194mV at current density of 10mA/cm2
and
Tafel slope was 126 mV dec-1
. Moreover, it exhibits notable results of durability for
24 hours. With the help of Sr2TiFO6 (STF) based double perovskites electrocatalysts,
we can develop more efficient process and enhance the activity towards water splitting
reactions.
