Research Highlight

  1. Longitudinal Strain Engineering of Cu2-xS by the Juxtaposed Cu5FeS4 phase in the Cu5FeS4/Cu2-xS/Cu5FeS4 Nanosandwich

    J. Park, S. Lim, T. Kwon, M. Jun, A. Oh, H. Baik, K. Lee
    Chem. Mater., 2019, accepted
    Structurally well-defined heteronanoparticles have received a great attention because their distinct structural features can be altered to achieve unprecedented properties. The cation exchange reaction, one of the most powerful techn...
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  2. Janus to core-shell to Janus: Facile cation movement in Cu2-xS/Ag2S hexagonal nanoplates induced by surface strain control

    T. KIm, J. Park, Y. Hong, A. Oh, H. Baik, K. Lee
    ACS Nano, 2019, accepted
     Nanocrystals with multiple compositions and hetero-interfaces have received a great attention due to novel multifunctional and synergistic physicochemical properties. In particular, hetero-interfaces have been at the focal point of ...
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  3. Morphology-controlled Metal Sulfides and Phosphides for Electrochemical Water Splitting

    J. Joo, T. Kim, J. Lee, S.-I. Choi, K. Lee
    Adv. Mater., 2019, 31, 1806682
    Because H2 is considered a promising clean energy source, water electrolysis has attracted great interest in related research and technology. Noble-metal-based catalysts have been used as electrode materials in water electroly...
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  4. Topotactic Transformations in an Icosahedral Nanocrystal to Form Efficient Water-Splitting Catalysts

    A. Oh, H. Y. Kim, H. Baik, B. Kim, N. K. Chaudhari, S. H. Joo, K. Lee
    Adv. Mater., 2019, 31, 1805546
    Designing high‐performance, precious‐metal‐based, and economic electrocatalysts remains an important challenge in proton exchange membrane (PEM) electrolyzers. Here, a highly active and durable bifunctional electrocatalyst for PEM electr...
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  5. Janus nanoparticle structural motif control via asymmetric cation exchange in edge-protected Cu1.81S@IrxSy hexagonal nanoplates

    J. Park, J. Park, J. Lee, A. Oh, H. Baik, K. Lee
    ACS Nano, 2018, 12, 7996.
    Post-synthetic transformation of nanoparticles has received great attention, because this approach can provide an unusual route to elaborately composition-controlled nanostructures while maintaining the overall structure of the templ...
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  6. Hollow nanoparticles as emerging electrocatalysts for renewable energy conversion reactions

    J. Park, T. Kwon, J. Kim, H. Jin, H.Y. Kim, B. Kim, S. H. Joo, K. Lee
    Chem. Soc. Rev., 2018, 47, 8173
    While the realization of clean and sustainable energy conversion systems primarily requires the development of highly efficient catalysts, one of the main issues had been designing the structure of the catalysts to fulfill minimum cost as we...
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  7. Dendrite-embedded Pt-Ni Multiframes as Highly Active and Durable Electrocatalyst towards the Oxygen Reduction Reaction

    H. Kwon, M. K. Kabiraz, J. Park, A. Oh, H. Baik, S.-I. Choi, K. Lee
    Nano Lett., 2018, 18, 2930.
    Pt-based nanoframe catalysts have been explored extensively due to their superior activity towards the oxygen reduction reaction (ORR). Herein, we report the synthesis of Pt-Ni multiframes, which exhibit the unique structure of tightly fu...
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  8. Vertex-reinforced PtCuCo ternary nanoframes as efficient and stable electrocatalysts for the oxygen reduction reaction and the methanol oxidation reaction

    T. Kwon, M. Jun, H. Y. Kim, A. Oh, J. Park, H. Baik, S. H. Joo, K. Lee
    Adv. Funct. Mater., 2018, 28, 1706440.
    Noble metal binary alloy nanoframes have emerged as a new class of fuel cell electrocatalysts because of their intrinsic high catalytic surface area and accompanied high catalytic activity. However, their inferior structural and comp...
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  9. Lanthanide Metal-Assisted Synthesis of Rhombic Dodecahedral MNi (M=Ir and Pt) Nanoframes toward Efficient Oxygen Evolution Catalysis

    H. Jin, Y. Hong, J. Yoon, A. Oh, N. K. Chaudhari, H. Baik, S. H. Joo, and K. Lee*
    Nano Energy, 2017, 42, 17.
    Synthesis of MNi (M = Ir or Pt) nanoframe via facet-passivation agents and its excellent electrocatalytic activity and durability to oxygen evolution reaction in acidic electrolyte. Mixed metal alloy nanoframeworks have shown a...
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  10. Radially Phase Segregated PtCu@PtCuNi Dendrite@Frame Nanocatalyst for the Oxygen Reduction Reaction

    J. Park, M. K. Kabiraz, H. Kwon, S. Park, H. Baik, S.-I. Choi*, K. Lee*
    ACS Nano, 2017, 11, 10844.
    Pt-based alloy nanoframes have shown a great potential as electrocatalysts toward oxygen reduction reaction (ORR) in fuel cells. However, the intrinsically infirm nanoframes could be severely deformed during extended electro-cyclings...
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  11. Iridium-based multimetallic nanoframe@nanoframe structure: An efficient and robust electrocatalyst toward oxygen evolution reaction

    J. Park, Y. J. Sa, H. Baik, T. Kwon, S. H. Joo*, K. Lee*
    ACS Nano, 2017, 11, 5500.
    Nanoframe electrocatalysts have attracted a great interest due to their inherently high active surface area per a given mass. Although recent progress has enabled the preparation of single nanoframe structures with a variety of...
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  12. Cobalt assisted synthesis of IrCu hollow octahedral nanocages as highly active electrocatalysts toward oxygen evolution reaction

    T. Kwon, H. Hwang, Y. J. Sa, J. Park, H. Baik, S. H. Joo*, K. Lee*
    Adv. Funct. Mater., 2017, 27, 1604688.
    . Development of oxygen evolution reaction (OER) catalysts with reduced precious metal content while enhancing catalytic performance has been of pivotal importance in cost-effective design of acid polymer electrolyte membrane water elect...
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  13. Facet-controlled hollow Rh2S3 hexagonal nanoprisms as highly active and structurally robust catalysts toward hydrogen evolution reaction

    D. Yoon, B. Seo, J. Lee, K. S. Nam, B. Kim, S. Park, H. Baik, S. H. Joo*, and K. Lee*
    Energy Environ. Sci., 2016,9, 850-856
    Developing highly active and structurally robust electrocatalysts for hydrogen evolution reaction (HER) is of paramount importance for sustainable and clean production of hydrogen. Metal sulphides exposing catalyti...
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  14. RhCu 3D Nanoframe as a Highly Active Electrocatalyst for oxygen evolution reaction under alkaline condition

    J. Park, J. Kim, Y. Yang, D. Yoon, H. Baik, S. Haam, H. Yang*, K. Lee*
    Adv. Sci. 2016, 1500252
    One pot synthesis of RhCu alloy truncated octahedral nanoframes, Cu@Rh core–shell nanoparticles, and a bundle of five RhCu nanowires is demonstrated. The RhCu alloy 3D nanoframe, in particular, exhibits excellent catalytic activit...
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  15. Rational Synthesis of Heterostructured M/Pt (M = Ru or Rh) Octahedral Nanoboxes and Octapods and Their Structure-Dependent Electrochemical Activity Toward the Oxygen Evolution Reaction

    H. Jin, K. W. Lee, N. T. Khi, H. An, J. Park, H. Baik, J. Kim, H. Yang*, K. Lee*
    Small, 2015, 11, 4462 (Cover Paper)
    Shape-controlled Pt-based seeds lead to completely different M/Pt (M = Ru or Rh) structures of nanobox or octapod. Unusually high catalytic activities of Pt@Ru octapod toward the oxygen evolution reaction are observe...
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  16. Skeletal platinum-based octahedral nanoframe with Cartesian coordinates via geometrically precise nanoscale phase segregation in a Pt@Ni core-shell nanocrystal

    A. Oh, H. Baik, D. S. Choi, J. Y. Cheon, B. Kim, H. Kim, S. Kwon, S. H. Joo*, Y. Jung*, K. Lee*
    ACS Nano, 2015, 9, 2856
    Catalytic properties of nanoparticles can be significantly enhanced by controlling nanoscale alloying and its structure. In this work, by using a facet-controlled Pt@Ni core–shell octahedron nanoparticle, we show that the...
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  17. Nanomaterials for Theranostics: Recent Advances and Future Challenges

    E. –K. Lim, T. Kim, S. Paik, S. Haam, Y.-M. Huh*, K. Lee*
    Chem. Rev., 2015, 115, 327
    This review mainly describes the theranostic research with nanomaterials since 2006, when nanomaterials started to be used extensively in the development of theranostic systems. First, a brief history of molecular imaging and per...
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