# Presentation: 408093

## NSF-Europe Materials Collaboration: Self-Organized Nanostructured Thin Films for Catalysis in Perovskite Related Membrane ReactorsJagannathan Sankar, North Carolina A&T State University, DMR 0502765Co-PI: Nina Orlovskaya (University of Central Florida from 01.01.2007, Michigan Technological University before 01.01.2007)European Collaborator: Vladislav Kharton (University of Aveiro, Portugal)

**NSF-Europe Materials Collaboration: Self-Organized Nanostructured Thin Films for Catalysis in Perovskite Related Membrane Reactors****Jagannathan Sankar, North Carolina A&T State University, DMR 0502765**Co-PI: Nina Orlovskaya (University of Central Florida from 01.01.2007, Michigan Technological University before 01.01.2007)European Collaborator: Vladislav Kharton (University of Aveiro, Portugal)

**Intellectual merit**
- The second year of collaborative research between NC A&T SU, UCF and the University of Aveiro (Portugal) is focused on development of nickel-containing porous catalytic coatings for oxygen-permeable membranes for oxygen separation and partial oxidation of hydrocarbons. Pulsed laser deposition of (La0.9Sr0.1)0.95Cr0.85Mg0.1Ni0.05O3- (LSCMN) and YBa2Cu3O7- (YBCO) perovskite thin films was used for the development of highly porous perovskite coatings.
- Microstructural evolution of amorphous LSCMN films during high temperature annealing creates nanoporous dendritic structure with significantly enhanced surface area. Effect of partial oxygen pressure during thin film deposition and annealing on phase transitions and nanopore formation were studied by x-ray diffractometry and micro-Raman spectroscopy. Catalytic nanoparticles of Ni and Ru were embedded into LSCMN films and their effect on partial oxidation of hydrocarbons is being studied.
- YBCO forms sub-micron pore structure of polycrystalline thin film on La2NiO4+ substrate. The crystallite orientation is strongly connected to that of substrate grains, being sensitive even to very small angles. These factors provide a good adhesion, sufficient thermomechanical stability of the activating layers and 2.4 times higher oxygen permeation flux through membrane compared to non-coated membrane.

- (La0.9Sr0.1)0.95Cr0.85Mg0.1Ni0.05O3-nanoporous thin film

- YBa2Cu3O7- polycrystalline film reproducing orientation of La2NiO4 substrate grains

## Research results of two graduate students Brandon Hancock and Kristofer Gordon (NCAT) were presented at the 31st International Cocoa Beach Conference & Exposition on Advanced Ceramics and Composites (oral presentation).
Results on phase transitions and mechanical property study of LSCMN were presented at the 2007 ASME International Mechanical Engineering Congress and Exposition (November 11-15, Seattle, WA). This research was performed by NCAT graduate students Kristofer Gordon and Brandon Hancock and results were published in the conference proceedings (IMECE2007-43845 “Characterization of (La0.9Sr0.1)0.95Cr0.85Mg0.10Ni0.05O3- ceramics for perovskite related membrane reactor”)
Kristofer Gordon, NCAT graduate student, submitted poster presentation to MRS meeting in San-Francisco (April 2008) based on his study on the development of catalytic porous coatings for oxygen permeable membranes.
Dr. S. Yarmolenko (NCAT) visited the University of Aveiro (Portugal) to present current results and work on the paper on YBCO coated oxygen permeable membrane (submitted to J. Membrane Sci.) 
MTU PhD student Matthew Swanson worked on the electrical characterization of the prospective membrane materials during his 6-month fellowship at EMPA, Duebendorf, Switzerland. 

- Research results of two graduate students Brandon Hancock and Kristofer Gordon (NCAT) were presented at the ***31st International Cocoa Beach Conference & Exposition on Advanced Ceramics and Composites (oral presentation).***
- Results on phase transitions and mechanical property study of LSCMN were presented at the 2007 ASME International Mechanical Engineering Congress and Exposition (November 11-15, Seattle, WA). This research was performed by NCAT graduate students Kristofer Gordon and Brandon Hancock and results were published in the conference proceedings (***IMECE2007-43845 “Characterization of (La******0.9******Sr******0.1******)******0.95******Cr******0.85******Mg******0.10******Ni******0.05******O******3-************ ceramics for perovskite related membrane reactor”***)
- Kristofer Gordon, NCAT graduate student, submitted poster presentation to MRS meeting in San-Francisco (April 2008) based on his study on the development of catalytic porous coatings for oxygen permeable membranes.
- Dr. S. Yarmolenko (NCAT) visited the University of Aveiro (Portugal) to present current results and work on the paper on YBCO coated oxygen permeable membrane (submitted to*** J. Membrane Sci.***)
- MTU PhD student Matthew Swanson worked on the electrical characterization of the prospective membrane materials during his 6-month fellowship at EMPA, Duebendorf, Switzerland.

**NSF-Europe Materials Collaboration: Self-Organized Nanostructured Thin Films ****for Catalysis in Perovskite Related Membrane Reactors** **Jagannathan Sankar, North Carolina A&T State University, DMR 0502765** **Broader Impact**** **

- Project web-site _[http://camss.ncat.edu/membrane](http://camss.ncat.edu/membrane)__ has been developed under the umbrella of the Center for Advanced Materials and Smart Structures (NC A&T SU). This fully database driven web-site facilitates collaboration and secure data exchange between partner institutions._
- Results of sinterability and microstructural study of (La0.9Sr0.1)0.95Cr0.85Mg0.1Ni0.05O3 performed by Rachel Rosten, MTU undergraduate student, were presented on MRS meeting in Boston (November 2006). Based on these results, the paper ***“A guide to the calculation of theoretical densities of crystal structures for SOFCs”*** with two other summer undergraduate participants as co-authors was published in the ***Journal of Undergraduate Materials Research*** and another paper is submitted to ***Solid State Ionics.***
- Student Participation / Broader Impact:
- Brandon Hancock and Kristofer Gordon (MS) African American minority students
- Matthew Swanson (PhD)
- Rachel Rosten (BS) – undergraduate female student