Synthesis, Characterization, and Electrocatalytic Properties of PrMn0.5M0.5O3 (M = Cr, Fe, Co, Ni) Perovskites
Date Issued
2025-02-06
Author(s)
Cheliku Ramadani, Besarta; Sela, Jeta; Stojanov, Leon; Popovska, Sofija; Mircheski, Valentin; Bukleski, Miha; Dimitrovska-Lazova, Sandra; A. Reka; Arianit; Aleksovska, Slobotka
Abstract
In this paper, the synthesis, characterization, and investigation of electrocatalytic
properties of perovskites of general formula PrMn0.5M0.5O3 (M = Cr, Fe, Co, Ni) are
presented. The synthesis was conducted by the solution combustion method using glycine
as a fuel. The perovskite with the formula PrMn0.5Fe0.5O3 was also synthesized by the sol
gel combustion method with citric acid as fuel. The obtained perovskites were investigated
by X-ray powder diffraction (XRPD), scanning electron microscopy (SEM) with energy
dispersive X-ray spectroscopy (EDX), infrared spectroscopy, and cyclic voltammetry. The
XRPDpatterns showed that the compounds are pure and isostructural within the series.
The unit cell parameters of the compounds were determined within the Pnma space group,
and several crystallochemical parameters were calculated and discussed. The recorded
SEM images of the perovskites revealed a porous morphology, while the EDX analysis
confirmed the 2:1:1 atomic percentage ratio of Pr:Mn:M. Within this investigation, the
electrocatalytic properties of the obtained perovskites towards oxidation of OH− ions and
H2O2 oxidation in phosphate buffer were studied by cyclic voltammetry, using a paraffin
impregnated graphite electrode (PIGE) modified with microcrystals of the investigated
perovskites. PrMn0.5Fe0.5O3 showed high electrocatalytic activity for OH− oxidation,
while both PrMn0.5Fe0.5O3 and PrMn0.5Co0.5O3 exhibited significant efficiency for H2O2
oxidation, with a distinct oxidation peak with a peak potential of 0.6 V.
properties of perovskites of general formula PrMn0.5M0.5O3 (M = Cr, Fe, Co, Ni) are
presented. The synthesis was conducted by the solution combustion method using glycine
as a fuel. The perovskite with the formula PrMn0.5Fe0.5O3 was also synthesized by the sol
gel combustion method with citric acid as fuel. The obtained perovskites were investigated
by X-ray powder diffraction (XRPD), scanning electron microscopy (SEM) with energy
dispersive X-ray spectroscopy (EDX), infrared spectroscopy, and cyclic voltammetry. The
XRPDpatterns showed that the compounds are pure and isostructural within the series.
The unit cell parameters of the compounds were determined within the Pnma space group,
and several crystallochemical parameters were calculated and discussed. The recorded
SEM images of the perovskites revealed a porous morphology, while the EDX analysis
confirmed the 2:1:1 atomic percentage ratio of Pr:Mn:M. Within this investigation, the
electrocatalytic properties of the obtained perovskites towards oxidation of OH− ions and
H2O2 oxidation in phosphate buffer were studied by cyclic voltammetry, using a paraffin
impregnated graphite electrode (PIGE) modified with microcrystals of the investigated
perovskites. PrMn0.5Fe0.5O3 showed high electrocatalytic activity for OH− oxidation,
while both PrMn0.5Fe0.5O3 and PrMn0.5Co0.5O3 exhibited significant efficiency for H2O2
oxidation, with a distinct oxidation peak with a peak potential of 0.6 V.
Subjects