Publications,  Patents, & Presentations

Publications

(Researchers in the Ellis lab, underlined)

1. Tran, A., S. Moore, A. Palmateer, J. N. Mendez, D. Gatzios, and L. D. Ellis. (2025) "Solvent Effects in Tandem Heterogeneous Dehydrogenation and Olefin Metathesis." In preparation.

2. Bathenaa, T., D. Gatzios, K. Kusima, M. Ibrahim, L. D. Ellis, B. M. Sivakumar, V. Prabhakaran, L. C. Grabow, A. S. Karakoti, K. Ramasamy, and K. A. Goulas.  (2025) "Redox Cycling and Restructuring of Silica-supported Bismuth Molybdate Catalysts". In preparation.

3.  Gatzios, D., S. Stockton, T. Azizli, E. M. Wynkoop, M. M. Montemore, and L. D. Ellis.  (2025)  "Heterogeneous Olefin Metathesis Promotion using  H2." Submitted.

4. Gatzios, D., S. Stockton, A. Hill, H. Frankovic, M. M. Montemore and L. D. Ellis.  (2025) “The Role of H2 Donation in Heterogeneous Mo-Based Olefin Metathesis Site Creation .” Cell Reports Physical Science, accepted.

5. Moore, S., A. Tran, A. Palmateer, J. Naranjo Mendez, D. Gatzios, P. Eschbach, J. Miscall, and L.D. Ellis. (2025)  “The Role of the Pt-Group Dehydrogenation Catalyst in Alkane Metathesis for Polyolefin Deconstruction” Journal of Catalysis, 447: 116070. [Link]

6. Sullivan, K.P.*, A. Werner*, K.J. Ramirez*, L.D. Ellis*, J. Bussard, B. Black, D. Brandner, F. Bratti, B. Buss, X. Dong, S. Haugen, M. Ingraham, M. Konev, W. Michener, J. Miscall, I. Pardo, S. Woodworth, A. Guss, Y. Roman-Leshkov, S. Stahl, G.T. Beckham.  (2022) “Mixed plastics waste valorization via tandem chemical oxidation and biological funneling.”  Science, 378, 207-211.  [Link] *denotes equal contribution

7. Ellis*, L.D., N.A. Rorrer*, K.P. Sullivan*, M. Otto, J.E. McGeehan, Y. Román-Leshkov. N. Wierckx, G.T. Beckham. (2021) “Chemical and biological catalysis for plastics upcycling.”  Nature Catalysis, 4, 539-556. [Link]  *denotes equal contribution

8. Ellis, L.D., S.V. Orski, A.G. Norman, G. K.L. Beers, Y. Román-Leshkov, G.T. Beckham. (2021) “Tandem heterogeneous catalysis for polyethylene depolymerization via an olefin intermediate process.” ACS Sustainable Chemistry & Engineering, 9, 623-628. [Link]

9. Ellis, L.D., S. Parker, J. Hu, H. Funke, J.L. Falconer, J.W. Medlin. (2020) “Tuning gas adsorption selectivity and diffusion rates in zeolite 5A with phosphonic acid monolayers.” Cell Reports Physical Sciences, 1: 100036. [Link]  

10. Ellis, L.D. & G.T. Beckham. (2019) “Reaction: Proteins from chemocatalysis; It’s what’s for dinner.” Chem, 5, 1353-1354. [Link]  

11. Ballesteros-Soberanas, J., L.D. Ellis, J.W. Medlin. (2019) “Effects of phosphonic acid monolayers on the dehydration mechanism of aliphatic alcohols on TiO2.” ACS Catalysis, 9: 7808-7816. [Link]  

12. Ellis, L.D., D.K. Schwartz, J.W. Medlin. (2019) “Effects of metal oxide surface doping with phosphonic acid monolayers on alcohol dehydration activity.” Applied Catalysis A: General, 571: 102-106. [Link]  

13. Coan, P.D., L.D. Ellis, D.K. Schwartz, J.W. Medlin. (2018) “Enhancing cooperativity in bifunctional acid-Pd catalysis with carboxylic acid-functionalized organic monolayers.” The Journal of Physical Chemistry Part C, 12: 6637-6647. [Link]  

14. Zhang, J., L.D. Ellis,  B. Wang, M. Dzara, C. Sievers, S. Pylypenko, E. Nikolla, J.W. Medlin. (2018) “Control of interfacial acid-metal catalysis with organiz monolayers.” Nature Catalysis, 1: 2520-1158. [Link]    

15. Ellis, L.D., R.M. Trottier, C.B. Musgrave, D.K. Schwartz, J.W. Medlin. (2017) “Controlling the surface reactivity of titania via electronic tuning of self-assembled monolayers.” ACS Catalysis, 7: 8351-8357. [Link]  

16. Ellis, L.D., S. Pylypenko, S.R. Ayotte, D.K. Schwartz, J.W. Medlin. (2016) “Trimethylsilyl-functionalized alumina exhibits increased activity for 1,2-propanediol dehydration.” Catalysis Science & Technology, 6: 5721-5728. [Link]  

17. Gould, T.D., M.M. Montemore, A.M. Lubers, L.D. Ellis, A.W. Weimer, J.L. Falconer, J.W. Medlin. (2015) “Enhanced dry reforming of methane on Ni and Ni-Pt catalysts synthesized by atomic layer deposition.”   Applied Catalysis A: General, 492: 107-116. [Link]  

18. Holwerda, E.K., L.D. Ellis, L.R. Lynd. (2013) “Development and evaluation of methods to infer biosynthesis and substrate consumption in cultures of cellulolytic microorganisms.” Biotechnology and Bioengineering, 110: 2380-2388. [Link]  

19. Spender, J., A.L. Demers, X. Xie, A.E. Cline, M.A. Earle, L.D. Ellis, D.J. Neivandt.  (2012) “Method for production of polymer and carbon nanofibers from water-soluble polymers.” Nano Letters, 12: 3857-3860. [Link]  

20. Ellis, L.D., E.K. Holwerda, S.Rogers, D.Hogsett, X.Shao, L.R. Lynd.  (2012) “Closing the carbon balance for fermentations by Clostridium thermocellum (ATCC 27405).” Bioresource Technology, 103: 293-299. [Link]  

21. Wark, M., B. Kalanyan, L.D. Ellis, J. Fick, L. Connell, D. Neivandt, and J.F. Vetelino. (2007) “A lateral field excited acoustic wave sensor for the detection of saxitoxin in water.” Proc. IEEE Ultrasonics Symposium, 28:1217–1220. [Link]   

Patents

1. Beckham, G.T., L.D. Ellis, K.P. Sullivan, A. Werner. (2022) “Upcycling Mixed Waste Plastic Through Chemical Depolymerization and Biological Funneling.” U.S. Provisional Patent Application No. 63/126,153. [Link]

2. Ellis, L.D. & G.T. Beckham. (2022) “Catalysts and methods for depolymerizing plastics.” U.S. Provisional Patent Application No. 63/050,209. [Link]

3. Falconer, J.L., J.W. Medlin, L.D. Ellis, H.H. Funke, S. Parker.  (2019)  “Functionalization of zeolites.”  U.S. Patent US11918974B2. [Link]  

4. Neivandt, D.J., J. Spender, X. Xie, and L.D. Ellis. (2010) “Carbon nano-structures from preformed polymers.” U.S. Patent 2011/0091711 A1. [Link]       

Presentations 

(beginning from end of 2021)

Student presentations (students in bold)

• 1.     D. Gatzios, S. Moore, S. Stockton, A. Tran, J. Naranjo-Mendez, J. Miscall, A. Hill, M. M. Montemore, and L. D. Ellis, Ellis Lab: Descriptor Analysis for Organic Reductants Capable of Controlling Active Site Formation in Molybdenum-based Heterogeneous Olefin Metathesis Catalysts, 2024 Pauling Medal Award, ACS, Portland Local Section. Poster presentation, Corvallis, OR. October 2024.

• 2.     E. López-Patton, S. Ionis, C. Jennewein, S. Stockton, and L. D. Ellis, Using Catalysts to Convert Lipids into Renewable Chemicals, Summer Experience in Science and Engineering for Youth (SESEY). Poster presentation, Oregon State University, Corvallis, OR. July 2024.

• 3.     S. Moore, A. Tran, A. Palmateer, D. Gatzios, J. Naranjo Mendez, P. Eschbach, J. Miscall, and L. D. Ellis, Enhanced Selective Depolymerization of Polyethylene using Supported Palladium and Rhenium-Oxide in Heterogeneous Tandem Dehydrogenation and Olefin Metathesis, ACS Spring Meeting 2024, General Catalysis Symposium. Oral presentation, New Orleans, LA. March 2024.

• 4.     D. Gatzios (winner of ACS CRE Travel Grant), H. Frankovic, H. Kersell, M. M. Montemore, and L. D. Ellis, Descriptor Analysis for Organic Reductants Capable of Controlling Active Site Formation in Mo-Based Heterogenous Olefin Metathesis Catalysts, ACS Spring Meeting 2024, Kinetic & Mechanistic Insights Symposium. Oral presentation, New Orleans, LA. March 2024.

• 5.     S. Hoffmann, E. Choi, and L. D. Ellis, Development of 3D-Printed Models to Better Communicate the Structure-Property Relationship of Heterogeneous Catalysts and Crystal Structures, Celebrating Undergraduate Excellence (CUE) Showcase. Poster presentation, Oregon State University, Corvallis, OR. May 2024.

• 6.     S. Stockton, D. Gatzios, and L. D. Ellis, Using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) to Elucidate the Structure of Heterogeneous Olefin Metathesis Active Sites During Reductive Pretreatments, Celebrating Undergraduate Excellence (CUE) Showcase. Poster presentation, Oregon State University, Corvallis, OR. May 2024.

• 7.     A. Tran, S. Moore, J. Naranjo Mendez, D. Gatzios, and L. D. Ellis, Kinetic Studies of Palladium and Rhenium Synergy in Tandem Dehydrogenation and Olefin Metathesis, Celebrating Undergraduate Excellence (CUE) Showcase. Poster presentation, Oregon State University, Corvallis, OR. May 2024.

• 8.     A. Tran, S. Moore, D. Gatzios, and L. D. Ellis, Novel Synergy of Palladium and Rhenium Catalyst in Tandem Dehydrogenation and Olefin Metathesis, Johnson Internship Symposium. Poster presentation, Oregon State University, Corvallis, OR. May 2024.

• 9.     S. Moore and L. D. Ellis, Tandem Catalysis for Polyethylene Depolymerization, GEM Annual Meeting. Poster presentation, Philadelphia, PA. 2023.

• 10.  A. Prins, J. Osburn, A. Palmateer, J. Naranjo Mendez, and L. D. Ellis, Using Catalyst to Chemically Recycle Plastics, Summer Experience in Science and Engineering for Youth (SESEY). Poster presentation, Oregon State University, Corvallis, OR. 2023.

• 11.  A. Palmateer, S. Moore, and L. Ellis, Using Olefin Metathesis in Depolymerizing Plastics to Reusable Olefin Products, ACS Regional Meeting. Poster presentation, Portland, OR. 2023.

• 12.  A. Tran, J. Naranjo Mendez, S. Moore, and L. D. Ellis, Characterization of Additives in Chemical Recycling of Plastic Waste through Tandem Dehydrogenation and Olefin Metathesis Using Heterogeneous Catalysis, Celebrating Undergraduate Excellence (CUE) Showcase. Poster presentation, Oregon State University, Corvallis, OR. May 2023.

• 13.  J. Naranjo Mendez, A. Tran, S. Moore, and L. D. Ellis, Impact of Additives in the Chemical Recycling of Plastic Waste Using Heterogeneous Tandem Dehydrogenation and Olefin Metathesis, Celebrating Undergraduate Excellence (CUE) Showcase. Poster presentation, Oregon State University, Corvallis, OR. May 2023.

• 14.  H. Frankovic, D. Gatzios, N.-C. Chiu, K. Stylianou, and L. D. Ellis, Impact of Synthesis Technique and Support Effects for Heterogeneous Olefin Metathesis Catalysts for Enhanced Propene Metathesis or Waste Plastic Upcycling, Celebrating Undergraduate Excellence (CUE) Showcase. Poster presentation, Oregon State University, Corvallis, OR. May 2023.

• 15.  A. Palmateer, S. Moore, and L. Ellis, Using Olefin Metathesis in Depolymerizing Plastics to Reusable Olefin Products, Johnson Internship Symposium. Poster presentation, Oregon State University, Corvallis, OR. 2023.

Dr. Ellis Oral Presentations

 (List beginning November 2021)

• 1.     L. D. Ellis, Tandem Catalysis for Waste Plastic Recycling & Upcycling, Murdoch College Science Research Conference, Vancouver, WA. November 2024. Invited keynote during dinner banquet.

• 2.     S. Moore, A. Tran, A. Palmateer, J. Naranjo Mendez, D. Gatzios, P. Eschbach, J. Miscall, and L. D. Ellis, Importance of Nanometer-Scale Bifunctional Interactions in Metathesis-Based Strategies for Polyolefin Deconstruction, AiChE Annual Meeting 2024, Catalytic Upcycling of Waste Plastics III: Modeling and catalyst design strategies, San Diego, CA. November 2024.

• 3.     D. Gatzios, H. Frankovic, A. Hill, M. M. Montemore, and L. D. Ellis, Descriptor Analysis for Organic Reductants Capable of Enhancing Active Site Formation in Mo-Based Heterogenous Olefin Metathesis, AiChE Annual Meeting 2024, Fundamentals of Catalysis and Surface Science VI: General, San Diego, CA. November 2024.

• 4.     S. Moore, D. Gatzios, A. Tran, A. Hill, A. Palmateer, J. Naranjo Mendez, P. Eschbach, J. Miscall, M. Montemore, and L. D. Ellis, Understanding and Using Heterogeneous Olefin Metathesis in Strategies to Upcycle Plastics, Pacific Coast Catalysis Society Annual Meeting, Seattle, WA. September 2024. (Withdrawn due to illness.). Invited.

• 5.     D. Gatzios, H. Frankovic, A. Hill, M. M. Montemore, and L. D. Ellis, Identifying Reductant Descriptors and Surface Structures that Enhance Active Site Formation in Mo-Based Heterogenous Olefin Metathesis Catalysts, 35th Annual Symposium of the Pacific Northwest Chapter of the AVS, Surface Analysis 24, Richland, WA, August 2024.  Invited.

• 6.     L. D. Ellis and S. Rochefort, Futile to Utile: Plastic Waste to Useful Products, PNW Consortium on Plastics Fall Webinar, Virtual, 2023.  Invited.

• 7.     L. D. Ellis, Tandem Catalysis for Plastics Upcycling, Academy of Lifelong Learning, Oregon State University, Corvallis, OR, 2023.  Invited.

• 8.     L. D. Ellis, Catalyst Design Strategies to Enhance Turn-Over Frequency, Selectivity, and Create Novel Reaction Pathways for Waste Plastic Upcycling, Materials Science School Seminar, Oregon State University, Corvallis, OR, 2022.  Invited.

• 9.     L. D. Ellis, Catalyst Design Strategies to Enhance Turn-Over Frequency, Selectivity, and Create Novel Reaction Pathways for Waste Plastic Upcycling, Nano-Engineered Systems (NanoES)/National Nanotechnology Coordinated Infrastructure (NNCI) Joint Seminar, Oregon State University/University of Washington, Virtual, 2021. Invited.

Dr. Ellis Poster Presentations (List beginning November 2021)

• 10.  S. Moore, A. Tran, A. Palmateer, D. Gatzios, J. Naranjo Mendez, P. Eschbach, J. Miscall, and L. D. Ellis, Understanding the Role of Catalyst Structure and Solvent in the Selective Depolymerization of Polyethylene Using Heterogeneous, Tandem Dehydrogenation and Olefin Metathesis, Gordon Research Conference – Catalysis, New London, NH. June 2024.

• 11.  S. Moore, A. Palmateer, D. Gatzios, J. Miscall, and L. D. Ellis, The Olefin Intermediate-Process (OIP): Effect of the Dehydrogenation Catalyst on Rate, Reaction Selectivity, and Yield in Tandem Catalysis for Polyolefin Depolymerization, NAM28: The 28th North American Catalysis Society Meeting, Providence, RI. June 2023.

• 12.  L. D. Ellis, Olefin-Intermediate Process: A Low-Temperature Means to Depolymerize Waste Plastics, AiChE Annual Conference – Sustainability and Sustainable Biorefineries, Phoenix, AZ. 2022.

• 13.  L. D. Ellis, Experiential Learning in Chemical Engineering – From Introduction to Engineering to Senior Laboratory, ASEE/AiChE Chemical Engineering Summer School, Colorado School of Mines, Golden, CO. 2022.

• 14.  L. D. Ellis, Olefin-Intermediate Process: A Low-Temperature Means to Depolymerize Waste Plastics, Gordon Research Conference – Catalysis, New London, NH. 2022.