George Tsilomelekis

Associate Professor

Chemical and Biochemical Engineering

Office:Engineering Building, C-242B
Website:Tsilomelekis Research Group


Diploma in Chemical Engineering, University of Patras, Greece, 2006

M.Sc., Chemical Engineering, University of Patras, Greece, 2011

Ph.D., Chemical Engineering, University of Patras, Greece, 2011

Postdoctoral Research: Catalysis Center for Energy Innovation, University of Delaware, USA, 2012-2015



Research Interests

Our research activity and interests focus in the broad field of the catalytic conversion of renewable and alternative energy sources to fuels and chemicals. Our approach involves the utilization of various spectroscopic methods and the development of Operando tools toward understanding complex catalytic reactions by establishing structure-function relationships.


Selected Publications

35) Zhenghong Li,  Adam Zuber,  Xiaonan Wang,  Justin Marlowe,  Ashil Vekaria,  Yingxi Lu,  Haoran Zhang*,  George Tsilomelekis*
"Towards the Coupling of Microbial Biosynthesis and Catalysis for the Production of Alkylated Phenolic Compounds"
AIChE Journal, In Press
34) Justin Marlowe, Shreyas Acharya, Adam Zuber and George Tsilomelekis*
"Characterization of Sulfated SnO2-ZrO2 Catalysts and Their Catalytic Performance on the Tert-Butylation of Phenol"
Catalysts 10 (7), 726
33) Thu D Nguyen, Fuat E Celik*, George Tsilomelekis*
"CO2 Assisted Ethane Oxidative Dehydrogenation Over MoO3 and V2O5 catalysts supported on Reducible CeO2-TiO2"
32) Hedun Wang and George Tsilomelekis*
"Catalytic Performance and Stability of Fe-Doped CeO2 in Propane Oxidative Dehydrogenation Using Carbon Dioxide as Oxidant"
Catalysis Science & Technology 2020, 10, 4362
31) Jonathan Colón-Ortiz, Pranav Ramesh, George Tsilomelekis, Alexander V. Neimark
"Permeation dynamics of dimethyl methylphosphonate through polyelectrolyte composite membranes by in-situ Raman spectroscopy"
Journal of Membrane Science 595, 117462
30) Trang Q Tran, Weiqing Zheng and George Tsilomelekis*
"Molten Salt Hydrates in the Synthesis of TiO2 Flakes"
ACS omega 4 (25), 21302
29) Kevin X Lee, Hedun Wang, Stavros Karakalos, George Tsilomelekis*, Julia A Valla*
"Adsorptive Desulfurization of 4, 6-Dimethyldibenzothiophene on Bimetallic Mesoporous Y Zeolites: Effects of Cu and Ce Composition and Configuration"
Industrial & Engineering Chemistry Research 58 (39), 18301
28) Ted V Tsoulos, Supriya Atta, Maureen J Lagos, Michael Beetz, Philip E Batson, George Tsilomelekis, Laura Fabris
"Colloidal plasmonic nanostar antennas with wide range resonance tunability"
Nanoscale 11 (40), 18662
27) Pranav Ramesh, Athanasios Kritikos and George Tsilomelekis*
"Effect of metal chlorides on glucose mutarotation and possible implications on humin formation"
Reaction Chemistry & Engineering 4 (2), 273
26) A. G. Kalampounias, George Tsilomelekis and Soghomon Boghosian
"Molten and glassy tellurium (IV) oxosulfato complexes in the TeO2–K2S2O7 system studied by Raman spectroscopy: Stoichiometry, vibrational properties and molecular structure"
Vibrational Spectroscopy 2018, 97, 85
25) Kevin X.Lee, George Tsilomelekis and Julia A.Valla
"Removal of benzothiophene and dibenzothiophene from hydrocarbon fuels using CuCe mesoporous Y zeolites in the presence of aromatics"
App. Catal. B, Environmental . 2018, 234, 130
24) Ashley M. Pennington, Amanda I. Okonmah, Daryll T. Munoz, George Tsilomelekis and Fuat E. Celik
"Changes in Polymorph Composition in P25-TiO2 During Pretreatment Analyzed by Differential Diffuse Reflectance Spectral Analysis"
J. Phys. Chem, C. 2018, 122, 5093
23) Ziwei Cheng, Jeffrey Everhart, George Tsilomelekis, Vladimiros Nikolakis, Basudeb Saha, Dion Vlachos
"Structural Analysis of Humins Formed in the Brønsted-Catalyzed Dehydration of Fructose"
Green Chem., 2018, 20, 997-1006
22) G Tsilomelekis, George D Panagiotou, Panagiota Stathi, Angelos G Kalampounias, Kyriakos Bourikas, Christos Kordulis, Yiannis Deligiannakis, Soghomon Boghosian, Alexis Lycourghiotis
"Molybdena deposited on titania by equilibrium deposition filtration: structural evolution of oxo–molybdenum (vi) sites with temperature"
Physical Chemistry Chemical Physics, 2016, 18, 23980 
21) A Tribalis, G Tsilomelekis, S Boghosian
"Molecular structure and reactivity of titania-supported transition metal oxide catalysts synthesized by equilibrium deposition filtration for the oxidative dehydrogenation of ethane"
Comptes Rendus Chimie, 2016, 19 (10), 1226 
20) G Tsilomelekis, MJ Orella, Z Lin, Z Cheng, W Zheng, V Nikolakis, DG Vlachos
"Molecular structure, morphology and growth mechanisms and rates of 5-hydroxymethyl furfural (HMF) derived humins"
Green Chem., 2016, 18, 1983-1993
19) W Deng, JR Kennedy, G Tsilomelekis, W Zheng, V Nikolakis
"Cellulose Hydrolysis in Acidified LiBr Molten Salt Hydrate Media"
Ind. Eng. Chem. Res., 2015, 54, 5226–5236
18) L Yang, G Tsilomelekis, S Caratzoulas, DG Vlachos
"Mechanism of Brønsted Acid‐Catalyzed Glucose Dehydration"
ChemSusChem, 2015, 8, 1334-1341
17) AG Kalampounias, G Tsilomelekis, S Boghosian
"Glass-forming ability of TeO2 and temperature induced changes on the structure of the glassy, supercooled, and molten states"
J. Chem. Phys. 2015, 142, 154503
16) AG Kalampounias, G Tsilomelekis, S Boghosian
"Vibrational dephasing and frequency shifts of hydrogen-bonded pyridine–water complexes"
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2015, 135, 31
15) TR Josephson, G Tsilomelekis, C Bagia, V Nikolakis, DG Vlachos, S Caratzoulas
"Solvent-Induced Frequency Shifts of 5-Hydroxymethylfurfural Deduced via Infrared Spectroscopy and ab Initio Calculations"
J. Phys. Chem, A. 2014, 118, 12149
14) AG Kalampounias, G Tsilomelekis, S Boghosian
"Unraveling the role of microenvironment and hydrodynamic forces on the vibrational relaxation rates of pyridine–water complexes"
J. Mol. Liq., 2014, 198, 299
13) A Tribalis, GD Panagiotou, G Tsilomelekis, AG Kalampounias, K Bourikas, C Kordulis, S Boghosian, A Lycourghiotis
"Temperature-Dependent Evolution of the Molecular Configuration of Oxo-Tungsten(VI) Species Deposited on the Surface of Titania"
J. Phys. Chem. C, 2014, 118, 11319
12) G Tsilomelekis, TR Josephson, V Nikolakis, S Caratzoulas
"Origin of 5-Hydroxymethylfurfural Stability in Water/Dimethyl Sulfoxide Mixtures"
ChemSusChem., 2014, 7, 117
11) AG Kalampounias, G Tsilomelekis, S Boghosian
"Liquid phase dynamics of molten M2S2O7 (M = K, Cs): A temperature dependent Raman spectroscopic study"
Vib. Spectrosc., 2013, 65, 66
10) G Tsilomelekis, S Boghosian
"On the configuration, molecular structure and vibrational properties of MoOx sites on alumina, zirconia, titania and silica"
Catal. Sci. Technol., 2013, 3, 1869
9) AG Kalampounias, G Tsilomelekis, S Boghosian
"Short-time microscopic dynamics of aqueous methanol solutions"
Mol. Phys., 2012, 110, 3095
8) AG Kalampounias, G Tsilomelekis, RW Berg, S Boghosian
"Molybdenum(VI) Oxosulfato Complexes in MoO3–K2S2O7–K2SO4 Molten Mixtures: Stoichiometry, Vibrational Properties, and Molecular Structures"
J. Phys. Chem. A, 2012, 116, 8861
7) G Tsilomelekis, S Boghosian
"An operando Raman study of molecular structure and reactivity of molybdenum(VI) oxide supported on anatase for the oxidative dehydrogenation of ethane"
Phys. Chem. Chem. Phys., 2012, 14, 2216
6) G Tsilomelekis, S Boghosian
"In Situ Raman and FTIR Spectroscopy of Molybdenum(VI) Oxide Supported on Titania Combined with 18O/16O Exchange: Molecular Structure, Vibrational Properties, and Vibrational Isotope Effects"
J. Phys. Chem. C, 2011, 115, 2146
5) G Tsilomelekis, A Tribalis, AG Kalampounias, S Boghosian, GD Panagiotou, K Bourikas, C Kordulis, A Lycourghiotis
"Temperature–dependent evolution of molecular configurations of oxomolybdenum species on MoO3/TiO2 catalysts monitored by in situ Raman spectroscopy"
Stud. Surf. Sci. Catal., 2010, 175, 613
4) G Tsilomelekis, S Boghosian
"Structural and vibrational properties of molybdena catalysts supported on alumina and zirconia studied by in situ Raman and FTIR spectroscopies combined with 18O/16O isotopic substitution"
Catal. Today, 2010, 158, 146
3) SA Karakoulia, KS Triantafyllidis, G Tsilomelekis, S Boghosian, AA Lemonidou
"Propane oxidative dehydrogenation over vanadia catalysts supported on mesoporous silicas with varying pore structure and size"
Catal. Today, 2009, 141
2) J Due-Hansen, S Boghosian, A Kustov, P Fristrup, G Tsilomelekis, K Ståhl, CH Christensen, R Fehrmann
"Vanadia-based SCR catalysts supported on tungstated and sulfated zirconia: Influence of doping with potassium"
J. Catal., 2007, 251, 459
1) G Tsilomelekis, A Christodoulakis, S Boghosian
"Support effects on structure and activity of molybdenum oxide catalysts for the oxidative dehydrogenation of ethane"
Catal. Today, 2007, 127, 139