1 research outputs found
New Approach to Fully Ordered fct-FePt Nanoparticles for Much Enhanced Electrocatalysis in Acid
Fully
ordered face-centered tetragonal (fct) FePt nanoparticles (NPs) are
synthesized by thermal annealing of the MgO-coated dumbbell-like FePt-Fe<sub>3</sub>O<sub>4</sub> NPs followed by acid washing to remove MgO.
These fct-FePt NPs show strong ferromagnetism with room temperature
coercivity reaching 33 kOe. They serve as a robust electrocatalyst
for the oxygen reduction reaction (ORR) in 0.1 M HClO<sub>4</sub> and
hydrogen evolution reaction (HER) in 0.5 M H<sub>2</sub>SO<sub>4</sub> with much enhanced activity (the most active fct-structured alloy
NP catalyst ever reported) and stability (no obvious Fe loss and NP
degradation after 20 000 cycles between 0.6 and 1.0 V (vs RHE)).
Our work demonstrates a reliable approach to FePt NPs with much improved
fct-ordering and catalytic efficiency for ORR and HER