[Seminar] Szemináriumok - Seminars: Mona Bahout

[Szeminárium koordinátor]

SZFI SeminarMona BahoutUniversité de Rennes (host: Temleitner László)Neutron Powder Diffraction : a tool to monitor Ni exsolution on perovskite oxidesTuesday, 12 November 2019, 10:00, KFKI Campus, Bldg. 1, 2nd floor, Conference RoomSolid oxide fuel cells (SOFCs) transform chemical energy to electrical energy by an electrochemical conversion process with less CO2 emission in comparison to most other conventional power generation systems. Ni-based composite (Ni-cermet) has been widely used as a SOFC anode material because of the excellent catalytic activity and electrical conductivity of Ni. However, Ni-based anode suffers from carbon build-up (coking), sulfur poisoning and low stability to redox cycling [1]. Among the alternative materials that have been studied, the layered perovskite manganites, LnBaMn2O5+δ (Ln = Pr, Nd) continue to attract attention [2-4]. The electrocatalytic activity of LnBaMn2O5+δ materials can be improved by in situ formation of of Ni-nanoparticles which has been monitored by high temperature neutron powder diffraction (NPD) under hydrogen. These results complement electron microscopy characterizations.  [1] S. McIntosh, R. J. Gorte, Chem. Rev. 2004, 104, 4845−4865.[2] F. Tonus, M. Bahout et al., J. Mater. Chem. A 2017, 5, 11078-11085.[3] S. Sengodan et al., Sustainable Chem. Eng. 2017, 5, 9207−9213.[4] M. Bahout et al., J. Mater. Chem. A 2015, 3, 15420-15431.  Minden érdeklődőt szívesen látunk! - Everyone is welcome to attend.Róbert Juhászszfi-seminar at wigner.mta.hu
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