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1. Spectroscopic Observation and Modeling of Photonic Modes in CeO2 Nanostructures

   https://doi.org/10.1093/micmic/ozad059  

   Wang, Yifan; Yang, Shize; Crozier, Peter A (July 2023, Microscopy and Microanalysis)

   Abstract Photonic modes in dielectric nanostructures, e.g., wide gap semiconductor like CeO2 (ceria), have the potential for various applications such as information transmission and sensing technology. To fully understand the properties of such phenomenon at the nanoscale, electron energy-loss spectroscopy (EELS) in a scanning transmission electron microscope was employed to detect and explore photonic modes in well-defined ceria nanocubes. To facilitate the interpretation of the observations, EELS simulations were performed with finite-element methods. The simulations allow the electric and magnetic field distributions associated with different modes to be determined. A simple analytical eigenfunction model was also used to estimate the energy of the photonic modes. In addition, by comparing various spectra taken at different location relative to the cube, the effect of the surrounding environment on the modes could be sensed. This work gives a high-resolution description of the photonic modes' properties in nanostructures, while demonstrating the advantage of EELS in characterizing optical phenomena locally. 

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2. DRIFTS investigation of toluene oxidation on CeO2 nanoparticles

   https://doi.org/10.1016/j.susc.2022.122042  

   Huttunen, Paul K.; Labadini, Daniela; Asselin, Genevieve; Hafiz, Sabrina S.; Gokalp, Sumeyra; Kipreos, Maria D.; Foster, Michelle (June 2022, Surface Science)
3. Nanoshaped CeO2 and SiO2 supported Ru catalyst for plasma catalysis chemical looping reactions

   Ranganathan, R.V.; Liu, Z.; Menon, H.; Talukdar, S.; Wang, R.; Uddi, M. (May 2020, International journal of energy engineering)
4. Nanoshaped CeO2 and SiO2 Supported Ru catalyst for Plasma Catalysis Chemical Looping Reactions

   Rajagopalan, Ranganathan; Zhongqi, Liu; Harigovind, Menon; Shaon, Talukdar; Ruigang, Wang; Mruthunjaya, Uddi (November 2020, International journal of energy engineering)

   null (Ed.)

   Chemical Looping Reaction is a key strategy to achieve both emission reduction and carbon utilization while producing various value-added chemicals, through redox reactions. Here we study the effect of nanoshape ceria supported Ru catalysts for plasma assisted Chemical Looping Reforming reduction step coupled with water splitting oxidation step reactions in the temperature range 150 ⁰C to 400 ⁰C at 1 atm pressure. The oxygen carrier/catalyst combination materials used are Ru/CeO2 nanorods (NR), Ru/CeO2 nanocubes (NC), Ru/SiO2 nanospheres (NS), and Ni-based perovskite mixed with CeO2. NRs and NCs showed the best catalytic performance followed by Ni-based perovskite and NS. Differences in the selectivity and reactivity for the NRs and NCs were noticed. The NCs showed slightly higher selectivity towards H2 formation during reduction step and lesser carbon deposition. From the analysis of data and literature, it is proposed that the spillover of species such as H adatoms and CHx radicals after activation at Ru sites into the CeO2 supports and lattice O mobility may be slightly faster in the case of NCs. During the oxidation step, the NR and NC materials showed increased H2 production by a factor of more than 4 when compared to Ni based perovskite material. 

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5. Strong metal-support interaction (SMSI) of Pt/CeO2 and its effect on propane dehydrogenation

   https://doi.org/10.1016/j.cattod.2020.06.075  

   Zhu Chen, Johnny; Talpade, Abhijit; Canning, Griffin A.; Probus, Paige R.; Ribeiro, Fabio H.; Datye, Abhaya K.; Miller, Jeffrey T. (August 2020, Catalysis Today)

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