Home

rhodium

Rhodium is a chemical element with the symbol Rh and atomic number 45. It is a hard, silvery-white transition metal of the platinum group. Rhodium is extremely rare and highly valued for its resistance to corrosion, high-temperature stability, and bright reflectivity, properties that make it useful in many industrial and decorative applications.

Rhodium occurs mostly in conjunction with platinum group metals in ores mined in South Africa, Russia, Canada,

Physically, rhodium has a melting point of about 1,964°C and a boiling point near 3,695°C. It is

The largest application is as a catalyst in automotive catalytic converters, where rhodium promotes the reduction

and
the
United
States.
It
is
produced
as
a
byproduct
of
refining
platinum
and
palladium.
Because
of
its
rarity
and
centralized
production,
rhodium
is
subject
to
significant
price
fluctuations
and
supply
risks.
one
of
the
most
corrosion-resistant
metals,
resisting
attack
by
acids
and
most
chemical
environments.
It
is
also
highly
reflective
and
forms
a
hard,
durable
surface
layer
when
used
as
a
plating.
of
nitrogen
oxides.
It
is
also
used
in
specialty
chemical
catalysts,
hydrogenation
reactions,
and
in
jewelry
plating
to
produce
a
bright,
durable
white
finish.
Additional
uses
include
electrical
contacts
and
high-precision
mirrors.