Journal
CHEMICAL RECORD
Volume 18, Issue 7-8, Pages 1114-1124Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/tcr.201700106
Keywords
nanoparticles; nanoalloys; core-shell; x-ray spectroscopy; metal phosphides; surface reactivity
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Funding
- Sorbonne Universite
- CNRS
- College de France
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Designing well-defined nanoparticles and nanoalloys is a tremendous way to achieve in-depth understanding of their intrinsic properties. In particular, structure and composition of the core and the surface of nanoalloys can be investigated by a combination of state-of-the-art insitu microscopy and spectroscopy. These nanoalloys represent a playground to establish structure-properties relationships within the nano-matter. They provide a much needed understanding of the distribution of each element within the nanoparticles, depending on the environment (gaseous atmosphere, temperature, etc.). This distribution may evolve over time. Lighter elements, such as phosphorus, are critical to the reactivity of the nanoparticle's surface in reactions such as CO or CO2 hydrogenation. Here, the rational design of nanoalloys will be discussed (reactants choice, composition control), in relation with their surface state. Consequences on heterogeneous and homogeneous catalytic reactions, as well as for energy storage and conversion, will be illustrated through examples.
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