Publications by authors named "Loredana De Rogatis"
Industrial catalysts are typically made of nanosized metal particles, carried by a solid support. The extremely small size of the particles maximizes the surface area exposed to the reactant, leading to higher reactivity. Moreover, the higher the number of metal atoms in contact with the support, the better the catalyst performance.
View Article and Find Full Text PDFDespite the wide application of ceria-zirconia based materials in Three Way Catalysts (TWCs), Solid Oxides Fuel Cells (SOFCs), and H(2) production and purification reactions, an active debate is still open on the correlation between their structure and redox/catalytic performances. Existing reports support the need of either (i) a homogeneous solid solution or (ii) materials with nanoscale heterogeneity to obtain high activity and stability. Here we report on a simple and inexpensive approach to solve this problem taking advantage of the luminescence properties of Eu(III), used as a structural probe introduced either in the bulk or on the surface of the samples.
View Article and Find Full Text PDFArticle Synopsis
- The study reveals that the critical step for CO2 reacting with hydrogen on Ni(110) involves a shift in how the CO2 molecule interacts with the metal surface at different temperatures.
- Initially, CO2 binds to Ni through its carbon atom at low temperatures (90 K); however, as the temperature increases and hydrogen is present, the binding changes to involve both oxygen atoms of CO2, resulting in the formation of formate.
- The findings contribute to a better understanding of catalytic processes in organic synthesis using CO2, highlighting why Ni shows lower hydrogenation barriers compared to common Cu catalysts, and suggesting insights into the high activity of NiCu alloys.