Ceria Catalysts at Nanoscale: How Do Crystal Shapes Shape Catalysis?
By A. Trovarelli, Jordi Llorca. 2017
647 citations recorded by the source corpus.
Engineering the shape and size of catalyst particles and the interface between different components of heterogeneous catalysts at the nanometer level can radically alter their performances. This is particularly true with CeO2-based catalysts, where the precise control of surface atomic arrangements can modify the reactivity of Ce4+/Ce3+ ions, changing the oxygen release/uptake characteristics of ceria, which, in turn, strongly affects catalytic performance in several reactions like CO, soot, and VOC oxidation, WGS, hydrogenation, acid–base reactions, and so on. Despite the fact that many of these catalysts are polycrystalline with rather ill-defined morphologies, experimental and theoretical studies on well-defined nanocrystals have clearly established that the exposure of specific facets can increase/decrease surface oxygen reactivity and metal–support interaction (for supported metal nanoparticles), consequently affecting catalytic reactions. Here, we want to address the most recent developments in this...
Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/aa27fa5fd4e6e79056713562ae3e3d5528347a2f
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In Materials Chemistry
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Raman spectroscopy as a powerful tool to characterize ceria-based catalysts (2020, background): “govern activity and stability in these reactions [13-18].”