1 research outputs found
Manganese Carbonate (Mn<sub>2</sub>(CO<sub>3</sub>)<sub>3</sub>) as an Efficient, Stable Heterogeneous Electrocatalyst for the Oxygen Evolution Reaction
With the growing population and energy demand, there
is an urgent
need for the production and storage of clean energy obtained from
renewable resources. Water splitting electrocatalytically is a major
approach to obtain clean H2. The efficiency, stability,
and slow kinetics of anode materials developed so far do not fit the
commercial application of the water oxidation reaction. To develop
an efficient energy conversion catalyst, particularly for the oxygen
evolution reaction (OER) herewith, Mn2(CO3)3 was electrodeposited on a Ni foam (NF) electrode surface
by the chronoamperometric technique. The deposited Mn2(CO3)3/NF was characterized using various surface characterization
techniques. The electrochemical behavior of the Mn2(CO3)3/NF-deposited electrode toward the OER was studied
using electrochemical methods in KOH (pH 14) and NaHCO3 (pH 8.3) electrolytes. The Mn2(CO3)3/NF electrode showed a lower overpotential than CO3/NF
and NF electrodes in the KOH/NaHCO3 media. The Mn2(CO3)3/NF electrode performs high electrocatalytic
water oxidation with an overpotential of 360 mV at a current density
of 10 mA·cm–2. This overpotential is much lower
than those of CO3/NF (460 mV) and bare NF (520 mV), with
good long-term stability in the KOH medium without any catalytic degradation
after 100 CV cycles and 15 h chronoamperometric studies. The stability
of the electrodeposited Mn2(CO3)3 on the NF electrode was determined by X-ray photoelectron spectroscopy.
Thus, the Mn2(CO3)3/NF catalyst is
suitable for the oxygen evolution reaction