3D CataLytic Environmental lAb at the Nanoscale
ANR project n°15-CE09-0009-01 (2015-2019)
Challenge 3 "Industrial Renewal"
Contact: Thierry EPICIER, firstname.lastname@example.org (updated 2018/01/28)
Special Issue "Environmental Electron Microscopy", J. of Microscopy, RMS, Wiley
Two contributions from members of the 3DCLEAN project (respectively MATEIS - cover - and IPCMS)
Project focus on AXELERA web site
Nanocatalysts in Environnemental TEM:
analysis of gases and 'real time 3D'
December 2016Co-organization of the GLEEM workshop
(CNRS DEFI 2016), O. ERSEN, T. EPICIER and D. ALLOYEAU
100 participants met at the Michel-Ange site of the CNRS (Paris) to discuss about Environmental Electron Microscopy.
In the context of the energetic transition, eco-friendly industrial strategy, sustainable growth and renewable energies, new catalysts are required in order to accelerate or guide reactions allowing more compounds to be industrially produced in a faster, purer, cleaner and less expensive way. Thus, in situ operando techniques are more and more requested to promote an efficient research and a better understanding of specific catalytic systems. The project 3DCLEAN will be conducted over 3 and a half years (42 months): it intends to develop new combined in-situ Transmission Electron Microscopy (TEM) approaches for dynamic investigations of complex heterogeneous catalysts under environmental conditions in 3D and/or at atomic resolution. Environmental Electron Microscopy techniques are now available, either in a dedicated Environmental TEM (ETEM), or in a High Pressure Environmental Cell (HPEC) which can fit any TEM. In this context we aim at promoting new innovative experiments in a synergetic strategy combining complementary equipments available by the partners: a unique aberration-corrected ETEM installed in France (CLYM Lyon) and the first HPEC delivered in Europe at IPCMS Strasbourg. These experiments consist in (i) in situ fast tomography of ongoing reactions under gas pressure and temperature as permitted in an ETEM (optimized through adequate image processing and analysis), (ii) quantitative spectrometric analysis of gas reaction products during in situ catalysis (Residual Gas Analysis system coupled to the HPEC).
3DCLEAN focuses on heterogeneous catalysis with the ambition to overcome existing scientific barriers in order to achieve innovations that can be used by industry. Rather than industrial catalysts, this task involves model systems which enable to vary parameters one by one (size or shape of nanoparticles (NPs), texture and nature of the support). Systems of high industrial and economical interest will be studied with common objectives: follow the evolution of the nano-catalysts in real time inside the microscopes from both the point of view of structural, morphological and chemical changes (down to the nanometric range, which means directly at the scale of the nanoparticle size, and even at atomic resolution) and quantitative analysis of the gaseous reactants.
The experiments planed in the project are challenging; lots of assumptions exist concerning catalyst deactivation: sintering of particles, surface reconstruction, coking, surface oxidation by water produced during the reaction. Following the evolution in the two systems described previously directly during reactions in the microscope should bring valuable information and open new perspectives in terms of developing optimized systems through a better comprehension of elementary but complex processes. In this respect we have constituted a pluridisciplinary consortium of four partners having the recognized expertise to cover the major aspects of the study in science of catalysis (IFPEN), electron microscopy (MATEIS-CLYM and IPCMS) and image analysis (CREATIS).