ELFT HÍRADÓ

[Szeminárium koordinátor <szfi-seminar AT wigner.mta.hu>]

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