BNL Home

Dimitriy Vovchok

Research Associate

Chemistry Division
Building 555
Brookhaven National Laboratory
P.O. Box 5000
Upton, NY 11973-5000

Phone: (631) 344-4344
Email: dvovchok@bnl.gov

Catalysis: Reactivity and Structure (CRS) Group

Research Interests

Characterization and reactivity studies of heterogeneous catalyst materials for dry reforming of methane, carbon dioxide hydrogenation, methanol synthesis, water gas shift, and related reactions. In-situ and operando synchrotron techniques including XRD and XAS, as well as in-situ DRIFTS and XPS studies.

Education

08/2013 – 06/2018: Doctor of Philosophy, Chemistry, Stony Brook University, Stony Brook, NY

  • Dissertation: In Situ Investigations of Cerium Oxide Based Catalysts for the Water-gas Shift Reaction
  • Chemistry Award for Outstanding Doctoral Student

09/2008 – 06/2013: Bachelor of science, Chemistry, CUNY Brooklyn College, Brooklyn, NY

Professional Experience

10/2018 – Present: Research Associate, Chemistry, Brookhaven National Laboratory, Upton, NY

  • Focus on heterogeneous catalysis for dry reforming of methane, carbon dioxide hydrogenation, and methanol synthesis

06/2014 – 06/2018: Research Assistant, Chemistry, Brookhaven National Laboratory, Upton, NY

  • Focus on heterogeneous catalysis for the water-gas shift reaction
  • Study of novel morphologies of cerium oxide.
  • Study of metals (Ni, Co, Cu) supported on mesoporous cerium oxide as powder catalysts for the water-gas shift.
  • Study of copper-zeolite (Cu/ZSM-5) materials as powder catalysts for the water-gas shift.
  • Reactivity measurements and catalyst characterization using wide variety of in-situ and operando techniques.

08/2013 – 06/2014: Teaching assistant, Chemistry, Stony Brook University, Stony Brook, NY

06/2012 – 06/2013: Undergraduate Research Assistant, CUNY Brooklyn College, Brooklyn, NY

  • Synthesis of heterogeneous powder catalysts for hydrogenation of heteroaromatic compounds.
  • Reactivity measurements for triphase catalytic reaction systems.

Recent Presentations

11/2017 – 2017 BNL Early Career Researcher Symposium: poster presentation

06/2017 – 25th North American Catalysis Society Meeting: oral presentation

05/2017 – 2017 NSLS-II and CFN Users’ Meeting: poster presentation

08/2016 – 252nd American Chemical Society National Meeting: oral presentation

08/2015 – 250th American Chemical Society National Meeting: poster presentation

Publications

  1. Vovchok, D., C. J. Guild, S. Dissanayake, J. Llorca, I. Waluyo, R. M. Palomino, J. A. Rodriguez, S. L. Suib and S. D. Senanayake (2018). “Structural and chemical state of doped and impregnated mesoporous Ni/CeO2 catalysts for the water-gas shift" Applied Catalysis A 567: 1-11
  2. Vovchok, D., J. Tata, Z. Liu, S. J. Khatib, J. A. Rodriguez, and S. D. Senanayake (2018). " Location and Chemical Speciation of Cu in ZSM-5 during the Water-Gas Shift Reaction" Catalysis Today Accepted
  3. Vovchok, D., C. J. Guild, S. Dissanayake, J. Llorca, E. Stavitski, Z. Liu, R. M. Palomino, I. Waluyo, Y. Li, A.I. Frenkel, J. A. Rodriguez, S. L. Suib and S. D. Senanayake (2018). "In-situ Characterization of Mesoporous Co/CeO2 Catalysts for the High Temperature Water-Gas Shift" Journal of Physical Chemistry C 122(16): 8998-9008
  4. Vovchok, D., C. J. Guild, J. Llorca, W. Xu, T. Jafari, P. Toloueinia, D. Kriz, I. Waluyo, R. M. Palomino, J. A. Rodriguez, S. L. Suib and S. D. Senanayake (2017). "Cu supported on mesoporous ceria: water gas shift activity at low Cu loadings through metal-support interactions." Physical Chemistry Chemical Physics 19: 17708-17717.
  5. Guild, C. J., D. Vovchok, D. A. Kriz, A. Bruix, B. Hammer, J. Llorca, W. Xu, A. El-Sawy, S. Biswas, J. A. Rodriguez, S. D. Senanayake and S. L. Suib (2017). "Water-Gas-Shift over Metal-Free Nanocrystalline Ceria: An Experimental and Theoretical Study." ChemCatChem 9(8): 1373-1377.
  6. Luo, S., T.-D. Nguyen-Phan, D. Vovchok, I. Waluyo, R. M. Palomino, A. D. Gamalski, L. Barrio, W. Xu, D. E. Polyansky, J. A Rodriguez, and S. D. Senanayake (2018). “Enhanced, robust light-driven H2 generation by gallium-doped titania nanoparticles.” Physical Chemistry Chemical Physics 20: 2104-2112
  7. Nguyen-Phan, T.-D., S. Luo, D. Vovchok, J. Llorca, S. Sallis, S. Kattel, W. Xu, L. F. J. Piper, D. E. Polyansky, S. D. Senanayake, D. J. Stacchiola and J. A. Rodriguez (2016). "Three-dimensional ruthenium-doped TiO2 sea urchins for enhanced visible-light-responsive H2 production." Physical Chemistry Chemical Physics 18(23): 15972-15979.
  8.  Nguyen-Phan, T.-D., S. Luo, D. Vovchok, J. Llorca, J. Graciani, J. F. Sanz, S. Sallis, W. Xu, J. Bai, L. F. J. Piper, D. E. Polyansky, E. Fujita, S. D. Senanayake, D. J. Stacchiola and J. A. Rodriguez (2016). "Visible Light-Driven H2 Production over Highly Dispersed Ruthenia on Rutile TiO2 Nanorods." ACS Catalysis 6(1): 407-417.
  9. Zhang, F., Z. Liu, S. Zhang, N. Akter, R. M. Palomino, D. Vovchok, I. Orozco, D, Salazar, J. A. Rodriguez, J. Llorca, J. Lee, D. Kim, W. Xu, A. I. Frenkel, Y. Li, T. Kim, and S. D. Senanayake (2018). “In Situ Elucidation of the Active State of Co–CeOx Catalysts in the Dry Reforming of Methane: The Important Role of the Reducible Oxide Support and Interactions with Cobalt.” ACS Catalysis 8: 3550-3560
  10. Nguyen-Phan, T.-D., Z. Liu, S. Luo, A. D. Gamalski, D. Vovchok, W. Xu, E. A. Stach, D. E. Polyansky, E. Fujita, J. A. Rodriguez and S. D. Senanayake (2016). "Unraveling the Hydrogenation of TiO2 and Graphene Oxide/TiO2 Composites in Real Time by in Situ Synchrotron X-ray Powder Diffraction and Pair Distribution Function Analysis." The Journal of Physical Chemistry C 120(6): 3472-3482.

photo of Dimitry Vovchok