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Different Synthesis Protocols for Co 3 O 4 –CeO 2 Catalysts—Part 1: Influence on the Morphology on the Nanoscale
Author(s) -
Yang Jingxia,
Lukashuk Liliana,
Akbarzadeh Johanna,
StögerPollach Michael,
Peterlik Herwig,
Föttinger Karin,
Rupprechter Günther,
Schubert Ulrich
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201403636
Subject(s) - crystallite , nanoparticle , catalysis , materials science , chemical engineering , nanoscopic scale , morphology (biology) , yield (engineering) , phase (matter) , nanotechnology , oxide , particle size , particle (ecology) , specific surface area , chemistry , composite material , metallurgy , organic chemistry , oceanography , biology , geology , engineering , genetics
Co 3 O 4 ‐modified CeO 2 (Co/Ce 1:4) was prepared by a combination of sol–gel processing and solvothermal treatment. The distribution of Co was controlled by means of the synthesis protocol to yield three different morphologies, namely, Co 3 O 4 nanoparticles located on the surface of CeO 2 particles, coexistent Co 3 O 4 and CeO 2 nanoparticles, or Co oxide structures homogeneously distributed within CeO 2 . The effect of the different morphologies on the properties of Co 3 O 4 –CeO 2 was investigated with regard to the crystallite phase(s), particle size, surface area, and catalytic activity for CO oxidation. The material with Co 3 O 4 nanoparticles finely dispersed on the surface of CeO 2 particles had the highest catalytic activity.