1 research outputs found
Microwave-Assisted Template-Free Synthesis of Ni<sub>3</sub>(BO<sub>3</sub>)<sub>2</sub>(NOB) Hierarchical Nanoflowers for Electrocatalytic Oxygen Evolution
The construction
of cost-effective, efficient, and sustainable
catalytic systems for electrocatalytic hydrogen generation by water
splitting is extremely important for future fuels globally. Herein,
we have prepared nickel orthoborate (NOB) via simultaneous oxidation
and reduction of nickel precursors and studied their role in oxygen
evolution reaction (OER) for water electrolysis. In addition, the
specific role of microwave irradiation and conventional stirring in
the formation of NOB was also investigated with comparative assessment
of their catalytic ability in electrochemical water splitting. It
was found that NOB nanoflowers prepared via microwave irradiation
exhibited better OER electrocatalyst than the ones prepared by conventional
heating. Interestingly, the NOB nanoflowers outperformed the commercial
NiO nanopowder under the identical experimental conditions in catalyzing
OER. Morphological hierarchy and high Brunauer–Emmett–Teller
specific surface area were attributed for their enhanced OER activity.
A long run of 6 h chronopotentiometry analysis showed a negligible
degradation in activity signified the high stability and endurance
of NOB nanoflowers. The numbers of merits from the electrochemical
characterizations revealed that NOB nanoflowers could be an alternate,
efficient, and abundant OER electrocatalyst for bulk water electrolysis