Praseodymium-doped Sr2TiFeO6-δ double perovskite as a bi-functional electrocatalyst for hydrogen production through water splitting

Water Splitting by electrocatalysis is one method of attaining sustainable production of hydrogen as a clean and promising energy source. Previous studies have shown that perovskite can be effective electrocatalyst for overall water splitting. Herein, double perovskites being highly stable structures have been reported to perform exceptionally in harsh electrochemical environments. The Praseodymium (Pr) doped Strontium Titanium Ferrite (STF) electrocatalyst was tested as an electrocatalyst for water splitting with conductive nickel foam. Pr was doped both on A and B sites of the STF’s double perovskite structure, and the SrTiFe0.9Pr0.1O6-δ (STFP01) showed the best results with an oxygen evolution reaction (OER) overpotential of 277.6 mV @ 5 mV/s and a hydrogen evolution reaction (HER) overpotential of 182.4 mV @ 5 mV/s with low Tafel slopes of 73 mV/dec and 77 mV/dec, respectively. The sponge-like structure of Pr-doped STF exhibits excellent potential to be a viable electrocatalyst while providing a stable structure.