Hoydoo You | Argonne National Laboratory

Biography

Education

Ph.D. in Physics, 1985 University of Washington
BS in Physics Education, 1979 Seoul National University

Professional Experience

1988-present : Argonne National Laboratory, Materials Science Division, Synchrotron Radiation Studies group.
1985-1988: Postdoc and Assistant Physicist: Brookhaven National Laboratory, Physics Department, X-ray scattering studies.

Award

Outstanding Performance Award, Board of Governors, UChicago–Argonne, LLC (2019)

Research Interests

Research interests are i) the utilization of x-ray techniques for the interfaces of real and model energy systems and ii) the development of the x-ray techniques sensitive to subtle changes occurring at the interfaces. The scope of research activities centers on molecular-level fundamental study of material interfaces important to energy conversion and storage under electrolyte or reactive gas environments. The Approaches involve utilizations of advanced synchrotron x-ray techniques enabling in situ studies of molecules of light elements interacting with solid surfaces under realistic reactive environments. The necessarily related research interest is developments of advanced x-ray techniques suitable for in situ investigations of such interfaces.

Recent Publications

Tomoya Kawaguchi, Vladimir Komanicky, Vitalii Latyshev, Wonsuk Cha,Evan R. Maxey, Ross Harder, Tetsu Ichitsubo, and Hoydoo You, Electrochemically Induced Strain Evolution in Pt-Ni Alloy Nanoparticles Observed by Bragg Coherent Diffraction Imaging, Nano Letters, submitted.
Reshma R Rao, Botao Huang, Yu Katayama, Jonathan Hwang, Tomoya Kawaguchi, Jaclyn R. Lunger, Jiayu Peng, Yirui Zhang, Asuka Morinaga, Hua Zhou, Hoydoo You, Yang Shao-Horn, pH- and Cation- Dependent Water Oxidation on Rutile RuO2(110), Journal of Physical Chemistry C, https://doi.org/10.1021/acs.jpcc.1c00413.
S. Choi, M. Chung, D. Kim, S. Kim, K. Yun, W. Cha, R.s Harder, T. Kawaguchi, Y. Liu, A. Ulvestad, H. You, M. K. Song, H. Kim, In situ strain evolution on Pt nanoparticles during hydrogen peroxide decomposition, Nano Letters, 20, 8541-8548 (2020) https://pubs.acs.org/doi/10.1021/acs.nanolett.0c03005
Yue Cao, Dina Sheyfer, Zhang Jiang, Siddharth Maddali, Hoydoo You, Bi-Xia Wang, Zuo-Guang Ye, Eric M. Dufresne, Hua Zhou, G. Brian Stephenson, Stephan O. Hruszkewycz, The Effect of Intensity Fluctuations on Sequential X-ray Photon Correlation Spectroscopy at the X-ray Free Electron Laser Facilities, Crystals 10 1109 (2020) https://doi.org/10.3390/cryst10121109
Tomoya Kawaguchi, Yihua Liu, Evguenia Karapetrova, Vladimir Komanicky Hoydoo You, In-situ to ex-situ in-plane structure evolution of stern layers on Pt(111) surface: Surface X-ray scattering studies, Journal of Electroanalytical Chemistry, 8785, 114495 (2020) https://doi.org/10.1016/j.jelechem.2020.114495
Tomoya Kawaguchi, Reshma R.Rao, Jaclyn R.Lunger, Yihua Liu, Donald Walko, Evguenia A.Karapetrova, Vladimir Komanicky, Yang Shao-Horn, Hoydoo You, Stern layers on RuO₂ (100) and (110) in electrolyte: Surface X-ray scattering studies, Journal of Electroanalytical Chemistry, 875, 114228 (2020) https://doi.org/10.1016/j.jelechem.2020.114228
Dong Young Chung, Pietro P. Lopes, Pedro Farinazzo Bergamo Dias Martins, Haiying He, Tomoya Kawaguchi, Peter Zapol, Hoydoo You, Dusan Tripkovic, Dusan Strmcnik, Yisi Zhu, Soenke Seifert, Sungsik Lee, Vojislav R. Stamenkovic, and Nenad M. Markovic, Dynamic stability of active sites in hydr(oxy) oxides for the oxygen evolution reaction, Nature Energy 5, 222 (2020). Article: https://doi.org/10.1038/s41560-020-0576-y Correction: https://www.nature.com/articles/s41560-020-0638-1
R. R. Rao, M. J. Kolb, J. Hwang, A. F. Pedersen, A. Mehta, H. You, K. A. Stoerzinger, Z. X. Feng, H. Zhou, H. Bluhm, L. Giordano, I. E. L. Stephens, Y. Shao-Horn, Operando identification of site-dependent water oxidation activity on ruthenium dioxide single-crystal surfaces, Nature Catalysis, 3, 516 (2020) https://doi.org/10.1038/s41929-020-0457-6
Dongwei Xu, Mitchell Hopper, Peter M Baldo, Haesun Park, Jeffrey A Eastman, Hoydoo You, Paul H Fuoss, Brian J Ingram, Peter Zapol, The effect of water vapor on surface oxygen exchange kinetics of thin film (La,Sr)(Co,Fe)O_3-d, J. Power Source, Journal of Power Sources 451, 227478 (2020) https://doi.org/10.1016/j.jpowsour.2019.227478
Yihua Liu, Hoydoo You, Yannick C. Kimmel, Daniel V. Esposito, Jingguang G. Chen, Thomas P. Moffat, Self-terminating Electrodeposition of Pt on WC Electrocatalysts, J. Appl. Surf. Sci. 504, 14472 (2020) https://doi.org/10.1016/j.apsusc.2019.144472
Enhancing catalytic activity of rhodium towards methanol electrooxidation in both acidic and alkaline media by alloying with iron, Vitalii Latyshev, Hoydoo You, Alexandra Kovalcikova, Vladimir Komanicky, Electrochimica Acta, 330, 135178 (2020). https://doi.org/10.1016/j.electacta.2019.135178
Tomoya Kawaguchi, Thomas F. Keller, Henning Runge, Luca Gelisio, Christoph Seitz, Young Yong Kim, Evan R. Maxey, Wonsuk Cha, Andrew Ulvestad, Stephan O. Hruszkewycz, Ross Harder, Ivan A. Vartanyants, Andreas Stierle, and Hoydoo You, Gas-induced segregation in Pt-Rh alloy nanoparticles observed by in situ Bragg coherent diffraction imaging, Phys. Rev. Lett. 123, 246001 (2019) https://doi.org/10.1103/PhysRevLett.123.246001
Study of the Internal Compositions of Binary Alloy Pd-Rh Nanoparticles by Using Bragg Coherent Diffraction Imaging, Tomoya Kawaguchi, Wonsuk Cha, Vitalii Latyshev, Serhii Vorobiov, Vladimir Komanicky, Hoydoo You, Journal of the Korean Physical Society, 75, 528-533 (2019) https://doi.org/10.3938/jkps.75.528
Evaluation of hydrogen evolution reaction activity of molybdenumnitride thinfilms on their nitrogen content, Miroslava Kozejova, Vitalii Latyshev, Viktor Kavecansky, Hoydoo You, Serhii Vorobiov, Alexandra Kovalcikova, Vladimir Komanicky, Electrochimica Acta, 315, 9-16 (2019) https://doi.org/10.1016/j.electacta.2019.05.097
Z. H. Zhu, J. Strempfer, R. R. Rao, J. Pelliciari, Y. Choi, T. Kawaguchi, H. You, J. F. Mitchell, Y. Shao-Horn, and R. Comin, Anomalous Antiferromagnetism in Metallic RuO₂ Determined by Resonant X-ray Scattering, Physical Review Letters, 122, 017202 (2019). https://www.doi.org/10.1103/PhysRevLett.122.017202
S. Vorobiov, D. Tomasova, V. Girman, H. You, E. Čižmár, M. Orendáč, V. Komanicky, Optimization of the magnetocaloric effect in arrays of Ni3Pt nanomagnets, J. of Magnetism and Magnetic Materials, 474 63-69 (2019). https://doi.org/10.1016/j.jmmm.2018.10.137
H. You, X-ray Scattering and Imaging Studies of Electrode Structure and Dynamics, The Chemical Record, 19, 1220-1232 (2019). https://doi.org/10.1002/tcr.201800083
R. R. Rao, M. J. Kolb, J. Hwang, A. F. Pedersen, A. Mehta, H. You, K. A. Stoerzinger, Z. X. Feng, H. Zhou, H. Bluhm, L. Giordano, I. E. L. Stephens, Y. Shao-Horn, Surface Orientation Dependent Water Dissociation on Rutile Ruthenium Dioxide, Journal of Physical Chemistry C, 122, 17802-17811 (2018) https://doi.org/10.1021/acs.jpcc.8b04284.
H. You, Y. Liu, A. Ulvestad, M.S. Pierce, V. Komanicky, Studies of Electrode Structures and Dynamics using Coherent X-ray Scattering and Imaging, Current Opinion in Electrochemistry, 4, 89-94 (2017) https://doi.org/10.1016/j.coelec.2017.10.017.
H. You, Angle calculations using two detector circles and wavelength, J. Applied Crystallography, 51, 1226 (2018). https://doi.org/10.1107/S1600576718009147
T. Kawaguchi, Y. Liu, M.S. Pierce, V. Komanicky, H. You, Direct determination of the one-dimensional interphase structure by crystal truncation rod analysis, J. Applied Crystallography, 51, 679-684 (2018) https://doi.org/10.1107/S1600576718004326.
Y. Liu, T. Kawaguchi, M.S. Pierce, V. Komanicky, H. You, Layering and Ordering in Electrochemical Double Layers, J. Phys. Chem. Lett., 9 1265-1271 (2018). https://doi.org/10.1021/acs.jpclett.8b00123
R.R. Rao, M.J. Kolb, N.B. Halck, A.F. Pedersen, A. Mehta, H. You, K.A. Stoerzinger, Z. Feng, H.A. Hansen, H. Zhou, L. Giordano, J. Rossmeisl, T. Vegge, I. Chorkendorff, I.E.L. Stephens, Y. Shao-Horn, Towards identifying the active sites on RuO2(110) in catalyzing oxygen evolution, Energy & Environmental Science, 10 2626-2637 (2017). https://doi.org/10.1039/C7EE02307C
K.-C. Chang, B. Ingram, J. Ilavsky, S. Lee, P. Fuoss, H. You, Synchrotron X-ray Studies of Model SOFC Cathodes, Part I: Thin Film Cathodes, Solid State Ionics, 311, 118-126 (2017) https://doi.org/10.1016/j.ssi.2017.10.005.
K.-C. Chang, B. Ingram, J. Ilavsky, S. Lee, P. Fuoss, H. You, Synchrotron X-ray Studies of Model SOFC Cathodes, Part II: Porous Powder Cathodes, Solid State Ionics, 311, 127-131 (2017) https://doi.org/10.1016/j.ssi.2017.10.001.
W. Cha, Y. Liu, H. You, G. B. Stephenson, and A. Ulvestad, Dealloying in Individual Nanoparticles and Thin Film Grains: A Bragg Coherent Diffractive Imaging Study, Adv. Funct. Mater. 1700331 (2017). http://onlinelibrary.wiley.com/doi/10.1002/adfm.201700331
A. Ulvestad, M. J. Welland, W. Cha, Y. Liu, J.W. Kim, R. Harder, E. Maxey, J. N. Clark, M. J. Highland, H. You, P. Zapol, S. O. Hruszkewycz and G. B. Stephenson, Three-dimensional imaging of dislocation dynamics during the hydriding phase transformation, Nature Material, 16, 565–571 (2017) http://www.nature.com/nmat/journal/vaop/ncurrent/abs/nmat4842.html.
Y. Liu, P. P. Lopes, W. Cha, R. Harder, J. Maser, E. Maxey, M. J. Highland, N. M. Markovic, S. O. Hruszkewycz, G. B. Stephenson, H. You, and A. Ulvestad, Stability Limits and Defect Dynamics in Ag Nanoparticles Probed by Bragg Coherent Diffractive Imaging, Nano Letters, 17, 1595-1601(2017). http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.6b04760
A. Loheac, A. Barbour, V. Komanicky, C. Zhu, J. Collini, A. Ruffino, Y. Liu, H. You, and M.S. Pierce, Interaction of Molecular Oxygen with Hexagonally Reconstructed Au (001) Surface, J. of Phys. Chem. C, 120, 23001 (2016).
J.-H. Kim, G. Kwon, H. Lim, C. Zhu, H. You, Y.-T. Kim, Effects of transition metal doping in Pt/M-TiO2 (M = V, Cr, and Nb) on oxygen reduction reaction activity, J. Power Sources, 320, 188 (2016); corrigendum, ibid 338, 163 (2016).
Y. Liu, A. Barbour, V. Komanicky, H. You, X‑ray Crystal Truncation Rod Studies of Surface Oxidation and Reduction on Pt(111). Journal of Physical Chemistry C 120, 16174 (2016).
A. Barbour, A. Alatas, Y. Liu, C. Zhu, B.M. Leu, X. Zhang, A. Sandy, M.S. Pierce, X. Wang, S.W. Cheong, H. You, Partial glass isosymmetry transition in multiferroic hexagonal ErMnO3, Physical Review B, 93 (2016) 054113.
C. Zhu, R. Harder, A. Diaz, V. Komanicky, A. Barbour, R. Xu, X. Huang, Y. Liu, M.S. Pierce, A. Menzel, H. You, Ptychographic x-ray imaging of surfaces on crystal truncation rod, Applied Physics Letters, 106 (2015) 101604.
E.M. Hopper, E. Perret, B.J. Ingram, H. You, K.-C. Chang, P.M. Baldo, P.H. Fuoss, J.A. Eastman, Oxygen Exchange in La0.6Sr0.4Co0.2Fe0.8O3-delta Thin-Film Heterostructures under Applied Electric Potential, Journal of Physical Chemistry C, 119 (2015) 19915-19921.
R.M. Karl, A. Barbour, V. Komanicky, C. Zhu, A. Sandy, M.S. Pierce, H. You, Charge-induced equilibrium dynamics and structure at the Ag(001)-electrolyte interface, Physical Chemistry Chemical Physics, 17 (2015) 16682-16687.
V. Komanicky, A. Barbour, M. Lackova, M. Zorko, C. Zhu, M. Pierce, H. You, Growth of arrays of oriented epitaxial platinum nanoparticles with controlled size and shape by natural colloidal lithography, Nanoscale Research Letters, 9 (2014) 336.
G. Pristas, S. Gabani, E. Gazo, V. Komanicky, M. Orendac, H. You, Influence of hydrostatic pressure on superconducting properties of niobium thin film, Thin Solid Films, 556 (2014) 470-474.
P. Fuoss, K.-C. Chang, H. You, In situ X-ray studies of film cathodes for solid oxide fuel cells, Journal of Electron Spectroscopy and Related Phenomena, 190 (2013) 75-83.
V. Komanicky, D.C. Hennessy, H. Iddir, P. Zapol, H. You, Electrocatalytic activity of surface oxides on platinum nanofacets and surfaces, Electrochimica Acta, 109 (2013) 440-446.
D. Hennessy, V. Komanicky, H. Iddir, M.S. Pierce, A. Menzel, K.-C. Chang, A. Barbour, P. Zapol, H. You, Epitaxial oxide bilayer on Pt (001) nanofacets, Journal of Chemical Physics, 136 (2012) 044704.
B.J. Ingram, J.A. Eastman, K.C. Chang, S.K. Kim, T.T. Fister, E. Perret, H. You, P.M. Baldo, P.H. Fuoss, In situ x-ray studies of oxygen surface exchange behavior in thin film La0.6Sr0.4Co0.2Fe0.8O3-delta, Applied Physics Letters, 101 (2012) 051603.
M.S. Pierce, A. Barbour, V. Komanicky, D. Hennessy, H. You, Coherent x-ray scattering experiments of Pt(001) surface dynamics near a roughening transition, Physical Review B, 86 (2012) 184108.
M.S. Pierce, V. Komanicky, A. Barbour, D.C. Hennessy, C. Zhu, A. Sandy, H. You, Dynamics of the Au (001) surface in electrolytes: In situ coherent x-ray scattering, Physical Review B, 86 (2012) 085410.
H. You, M. Pierce, V. Komanicky, A. Barbour, C. Zhu, Study of electrode surface dynamics using coherent surface X-ray scattering, Electrochimica Acta, 82 (2012) 570-575.
M.S. Pierce, D.C. Hennessy, K.C. Chang, V. Komanicky, J. Strzalka, A. Sandy, A. Barbour, H. You, Persistent oscillations of x-ray speckles: Pt (001) step flow, Applied Physics Letters, 99 (2011) 121910.
D. Strmcnik, D.F. van der Vliet, K.C. Chang, V. Komanicky, K. Kodama, H. You, V.R. Stamenkovic, N.M. Markovic, Effects of Li+, K+, and Ba2+ Cations on the ORR at Model and High Surface Area Pt and Au Surfaces in Alkaline Solutions, Journal of Physical Chemistry Letters, 2 (2011) 2733-2736.
V. Komanicky, H. Iddir, K.-C. Chang, A. Menzel, G. Karapetrov, D.C. Hennessy, P. Zapol, H. You, Fabrication and characterization of platinum nanoparticle arrays of controlled size, shape and orientation, Electrochimica Acta, 55 (2010) 7934-7938.
M.S. Pierce, K.C. Chang, D. Hennessy, V. Komanicky, M. Sprung, A. Sandy, H. You, Surface X-Ray Speckles: Coherent Surface Diffraction from Au(001), Physical Review Letters, 103 (2009) 165501.
C.A. Lucas, P. Thompson, M. Cormack, A. Brownrigg, B. Fowler, D. Strmcnik, V. Stamenkovic, J. Greeley, A. Menzel, H. You, N.M. Markovic, Temperature-Induced Ordering of Metal/Adsorbate Structures at Electrochemical Interfaces, Journal of the American Chemical Society, 131 (2009) 7654-7661.
V. Komanicky, H. Iddir, K.-C. Chang, A. Menzel, G. Karapetrov, D. Hennessy, P. Zapol, H. You, Shape-Dependent Activity of Platinum Array Catalyst, Journal of the American Chemical Society, 131 (2009) 5732.
C. Wang, D. van der Vilet, K.-C. Chang, H. You, D. Strmcnik, J.A. Schlueter, N.M. Markovic, V.R. Stamenkovic, Monodisperse Pt3Co Nanoparticles as a Catalyst for the Oxygen Reduction Reaction: Size-Dependent Activity, Journal of Physical Chemistry C, 113 (2009) 19365-19368.