A particulate supported noble metal phase-controlled catalyst material having
5-1000
m surface area of 50500 m2/gm is provided for use in direct
catalytic production of hydrogen peroxide (H2O2) product
from hydrogen and oxygen-containing feedstreams. The catalyst is made by depositing
phase controlled crystals of a noble metal such as palladium on a suitable particulate
support material such as carbon black, by utilizing a precursor solution of the
metal and a suitable control ionic polymer having molecular weight of 300-8000
such as sodium polyacrylate in a selected metal to polymer molar ratio of 1:0.1
to 1:10, which procedure provides desired phase control of the noble metal atoms
to form widely dispersed minute noble metal crystals on the support material. The
invention includes methods for making the catalyst, and also a process for utilizing
the catalyst to directly produce high yields of hydrogen peroxide (H2O2)
product from hydrogen and oxygen-containing gaseous feedstreams.
