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Venky Prabhakaran

Separations & Analysis Team
Chemical Engineer
Pacific Northwest National Laboratory
PO Box 999
MSIN: K8-88
Richland, WA 99352

Biography

Venkateshkumar (Venky) Prabhakaran received his B. Tech. in chemical and electrochemical engineering from the Central Electrochemical Research Institute (CECRI), India in 2009 and his Ph.D. in Chemical Engineering from the Illinois Institute of Technology in 2014. Following his postdoctoral appointment at Pacific Northwest National Laboratory (PNNL) (2014-2017), he became a research scientist in March, 2017. In 2017, he was awarded the EMSL M.T. Thomas Award for his outstanding postdoctoral work.

Venky's research interest lies at the confluence of molecular-level understanding of ionic interactions and nanoscale phenomena at electrochemical interfaces, and the rational design of efficient and sustainable electrochemical separation and energy storage systems. His research activities at PNNL includes: (i) molecular-level understanding of chemical transformations occurring at well-defined electrode-electrolyte interfaces prepared using ion soft-landing,(ii) development of in-situ and in-operando techniques for studying electrochemical processes at well-defined electrode-electrolyte interfaces prepared with soft-landed ions, and (iii) multimodal electrochemical imaging coupled with optical spectroscopy and mass spectrometry (iv) development of highly active and durable PGM-free ORR electrocatalysts for polymer electrolyte fuel cells.

Research Interests

  • Electrochemical Separations
  • Ion Soft Landing of Mass-Selected Ions
  • Electrode-electrolyte Interfacial Science
  • Electrochemical Imaging
  • Energy Storage and Conversion
  • Mass Spectrometry

PNNL Publications

2020

  • Edgecomb J.M., X. Xie, Y. Shao, P.Z. El-Khoury, G.E. Johnson, and V. Prabhakaran. 2020. "Mapping localized peroxyl radical generation on a PEM fuel cell catalyst using integrated scanning electrochemical cell microspectroscopy." Frontiers in Chemistry 8. PNNL-SA-153799. doi:10.3389/fchem.2020.572563
  • Zhang J., E.T. Baxter, M. Nguyen, V. Prabhakaran, R.J. Rousseau, G.E. Johnson, and V. Glezakou. 2020. "Structure and Stability of the Ionic Liquid Clusters [EMIM]n[BF4]n+1- (n = 1 - 9): Implications for Electrochemical Separations." The Journal of Physical Chemistry Letters 11, no. 16:6844-6981. PNNL-SA-153510. doi:10.1021/acs.jpclett.0c01671

2019

  • Prabhakaran V., Z. Lang, A. Clotet, J.M. Poblet, G.E. Johnson, and J. Laskin. 2019. "Controlling the Activity and Stability of Electrochemical Interfaces Using Atom-by-Atom Metal Substitution of Redox Species." ACS Nano 13, no. 1:458-466. PNNL-SA-132145. doi:10.1021/acsnano.8b06813
  • Wang X., V. Prabhakaran, Y. He, Y. Shao, and G. Wu. 2019. "Iron-Free Cathode Catalysts for Proton-Exchange-Membrane Fuel Cells: Cobalt Catalysts and the Peroxide Mitigation Approach." Advanced Materials 31, no. 31:Article Number 1805126. PNNL-SA-141392. doi:10.1002/adma.201805126

2018

  • Johnson G.E., V. Prabhakaran, N.D. Browning, B.L. Mehdi, J. Laskin, P.A. Kottke, and A.G. Fedorov. 2018. "DRILL Interface Makes Ion Soft Landing Broadly Accessible for Energy Science and Applications." Batteries and Supercaps 1, no. 3:97-101. PNNL-SA-133831. doi:10.1002/batt.201800042
  • Laskin J., G.E. Johnson, J. Warneke, and V. Prabhakaran. 2018. "From Isolated Ions to Multilayer Functional Materials Using Ion Soft Landing." Angewandte Chemie International Edition 57, no. 50:16270-16284. PNNL-SA-130953. doi:10.1002/anie.201712296
  • Su P., V. Prabhakaran, G.E. Johnson, and J. Laskin. 2018. "In situ Infrared Spectroelectrochemistry for Understanding Structural Transformations of Precisely Defined Ions at Electrochemical Interfaces." Analytical Chemistry 90, no. 18:10935-10942. PNNL-SA-137370. doi:10.1021/acs.analchem.8b02440
  • Yin R., V. Prabhakaran, and J. Laskin. 2018. "Quantitative Extraction and Mass Spectrometry Analysis at a Single-Cell Level." Analytical Chemistry 90, no. 13:7937-7945. PNNL-SA-137460. doi:10.1021/acs.analchem.8b00551

2017

  • Estevez L., V. Prabhakaran, A.L. Garcia, Y. Shin, J. Tao, A.M. Schwarz, and J.T. Darsell, et al. 2017. "Hierarchically Porous Graphitic Carbon with Simultaneously High Surface Area and Colossal Pore Volume Engineered via Ice Templating." ACS Nano 11, no. 11:11047-11066. PNNL-SA-126443. doi:10.1021/acsnano.7b05085

2016

  • Gunaratne K.D., V. Prabhakaran, A. Andersen, G.E. Johnson, and J. Laskin. 2016. "Charge Retention of Soft-Landed Phosphotungstate Keggin Anions on Self-Assembled Monolayers." Physical Chemistry Chemical Physics. PCCP 18, no. 13:9021-9028. PNNL-SA-114511. doi:10.1039/C5CP06954H
  • Laskin J., G.E. Johnson, and V. Prabhakaran. 2016. "Soft Landing of Complex Ions for Studies in Catalysis and Energy Storage." Journal of Physical Chemistry C 120, no. 41:23305-23322. PNNL-SA-119040. doi:10.1021/acs.jpcc.6b06497
  • Prabhakaran V., B.L. Mehdi, J.J. Ditto, M.H. Engelhard, B. Wang, K.D. Gunaratne, and D.C. Johnson, et al. 2016. "Rational Design of Efficient Electrode-Electrolyte Interfaces for Solid-State Energy Storage Using Ion Soft-Landing." Nature Communications 7. PNNL-SA-113159. doi:10.1038/ncomms11399

2015

  • Gunaratne K.D., V. Prabhakaran, G.E. Johnson, and J. Laskin. 2015. "Gas-Phase Fragmentation Pathways of Mixed-Addenda Keggin Anions: PMo12-nWnO403- (n = 0-12)." Journal of the American Society for Mass Spectrometry 26, no. 6:1027-1035. PNNL-SA-106983. doi:10.1007/s13361-015-1090-5
  • Gunaratne K.D., V. Prabhakaran, Y.M. Ibrahim, R.V. Norheim, G.E. Johnson, and J. Laskin. 2015. "Design and Performance of a High-Flux Electrospray Ionization Source for Ion Soft-Landing." Analyst 140, no. 9:2957-2963. PNNL-SA-108077. doi:10.1039/C5AN00220F

2014

  • Gunaratne K.D., G.E. Johnson, A. Andersen, D. Du, W. Zhang, V. Prabhakaran, and Y. Lin, et al. 2014. "Controlling the Charge State and Redox Properties of Supported Polyoxometalates via Soft Landing of Mass Selected Ions." Journal of Physical Chemistry C 118, no. 48:27611-27622. PNNL-SA-104962. doi:10.1021/jp505050m

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