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allied
academies
November 22-23, 2018 | Paris, France
Journal of Materials Science and Nanotechnology | Volume: 2
Materials Physics and Materials Science
International Conference on
The spin generated from ferromagnetism and anti-ferromagnetism conditions as the origin of the
catalytic activity of oxygen reduction reaction
Mahmoud R Reda
CanadElectrochim, Canada
P
latinum and Pt alloys are known to be the best catalyst
for oxygen reduction reaction (ORR). In the presence of
precious and expensive Pt and Pt alloys the ORR is still not
very efficient (sluggish). This means that it is very important
to find alternative non-precious metal which is cheaper
and more efficient than precious platinum. The ORR is the
cathode-anode reaction in fuel cells that runs hydrogen
powered vehicles and in water splitting reaction to hydrogen
and oxygen. Hydrogen is considered the optimum future
green fuel. It is well known that alloying Pt with Fe, Co or Ni
increase the rate oxygen reduction reaction (ORR). However,
the origin of this effect still remains elusive. The purpose of
this abstract is to show that under the effect of spin Seebeck
effect (induced thermal gradients) the increase of the spin
current of the conduction electrons of the platinum when
joined with ferromagnetic materials (Fe, Co or Ni) may be
responsible for such catalytic activity. Thus, this suggest that
antiferromagnets materials exposed to thermal gradients
such as for example PtMn or Cr which can generate extremely
higher spin current can be a possible replacement for Pt.
e:
mreda@canadelectrochim.net