The interaction of copper-containing spinels CuFe2O4 and CuFeCrO4 with hydrogen
Source abstract
Abstract
Abstract The interaction of hydrogen with copper-containing spinels CuFe2O4 and CuFeCrO4, which are the catalysts for hydrogenation, alkylation and other reactions, was studied. Copper ions of ferrite are reduced in a reductive atmosphere and segregated to the spinel Fe3O4 surface with the formation of Cu0 nanoparticles; their interaction with O2-contaning (less than 1 vol.%) helium leads to the oxidation to Cu2O or CuO. In a reductive medium, copper ferrite-chromite CuFeCrO4 segregates copper ions from spinel, which are reduced to Cu0 nanoparticles on the surface of CuFeCr-spinel. Charge compensation of spinel structure occurs due to formation of OH groups and by the partial transition Fе3+ – Fe2+. Upon mild reoxidation, Cu0 atoms partially return into the spinel structure and partially form the Cu2O phase.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Pigment Synthesis and Properties · Copper-based nanomaterials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
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