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  1. No Access

    Article

    Progress and roadmap for electro-privileged transformations of bio-derived molecules

    Biomass incorporates carbon captured from the atmosphere and can serve as a renewable feedstock for producing valuable chemicals and fuels. Here we look at how electrochemical approaches can impact biomass val...

    Cong Tian, Roham Dorakhan, Joshua Wicks, Zhu Chen, Kyoung-Shin Choi in Nature Catalysis (2024)

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    Article

    Selective deoxygenation of biomass-derived carbonyl compounds on Zn via electrochemical Clemmensen reduction

    For reductive upgrading of lignocellulosic biomass intermediates containing carbonyl groups, deoxygenation is critical to increase the energy density and storage lifetime of bio-oils. However, electrochemical ...

    **n Yuan, Kwanpyung Lee, Jonah B. Eisenberg, J. R. Schmidt in Nature Catalysis (2024)

  3. Article

    Open Access

    Predictive control of selective secondary alcohol oxidation of glycerol on NiOOH

    Many biomass intermediates are polyols and selectively oxidizing only a primary or secondary alcohol group is beneficial for the valorization of these intermediates. For example, production of 1,3-dihydroxyace...

    McKenna K. Goetz, Michael T. Bender, Kyoung-Shin Choi in Nature Communications (2022)

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    Article

    The impact of surface composition on the interfacial energetics and photoelectrochemical properties of BiVO4

    The ability to engineer a photoelectrode surface is pivotal for optimizing the properties of any photoelectrode used for solar fuel production. Altering crystal facets exposed on the surface of photoelectrodes...

    Dongho Lee, Wennie Wang, Chenyu Zhou, **ao Tong, Mingzhao Liu in Nature Energy (2021)

  5. Article

    Open Access

    Alcohol oxidation as alternative anode reactions paired with (photo)electrochemical fuel production reactions

    (Photo)electrochemical cells that produce fuels have often relied on water oxidation to complete the redox cycle. Here, the authors discuss alcohol oxidation as an alternative reaction and consider general mec...

    Michael T. Bender, **n Yuan, Kyoung-Shin Choi in Nature Communications (2020)

  6. Article

    Open Access

    Publisher Correction: Spectroelectrochemical study of water oxidation on nickel and iron oxyhydroxide electrocatalysts

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

    Laia Francàs, Sacha Corby, Shababa Selim, Dongho Lee in Nature Communications (2020)

  7. Article

    Open Access

    Spectroelectrochemical study of water oxidation on nickel and iron oxyhydroxide electrocatalysts

    Ni/Fe oxyhydroxides are the best performing Earth-abundant electrocatalysts for water oxidation. However, the origin of their remarkable performance is not well understood. Herein, we employ spectroelectrochem...

    Laia Francàs, Sacha Corby, Shababa Selim, Dongho Lee in Nature Communications (2019)

  8. Article

    Open Access

    Mechanistic insights of enhanced spin polaron conduction in CuO through atomic do**

    The formation of a “spin polaron” stems from strong spin-charge-lattice interactions in magnetic oxides, which leads to a localization of carriers accompanied by local magnetic polarization and lattice distort...

    Tyler J. Smart, Allison C. Cardiel, Feng Wu in npj Computational Materials (2018)

  9. No Access

    Article

    Enhancing long-term photostability of BiVO4 photoanodes for solar water splitting by tuning electrolyte composition

    As the performance of photoelectrodes used for solar water splitting continues to improve, enhancing the long-term stability of the photoelectrodes becomes an increasingly crucial issue. In this study, we repo...

    Dong Ki Lee, Kyoung-Shin Choi in Nature Energy (2018)

  10. Article

    Open Access

    Simultaneous enhancements in photon absorption and charge transport of bismuth vanadate photoanodes for solar water splitting

    n-Type bismuth vanadate has been identified as one of the most promising photoanodes for use in a water-splitting photoelectrochemical cell. The major limitation of BiVO4 is its relatively wide bandgap (∼2.5 eV),...

    Tae Woo Kim, Yuan **, Giulia A. Galli, Kyoung-Shin Choi in Nature Communications (2015)

  11. No Access

    Article

    Combined biomass valorization and hydrogen production in a photoelectrochemical cell

    In a typical hydrogen-producing photoelectrochemical cell (PEC), water reduction at the cathode (producing hydrogen) is accompanied by water oxidation at the anode (producing oxygen). This anode reaction is, h...

    Hyun Gil Cha, Kyoung-Shin Choi in Nature Chemistry (2015)

  12. No Access

    Article

    Electrochemical synthesis of inorganic polycrystalline electrodes with controlled architectures

    Most modern electrochemical and photoelectrochemical devices (e.g., solar cells, photoelectrochemical cells, fuel cells, and batteries) are composed of polycrystalline semiconductor and metal electrodes. The s...

    Kyoung-Shin Choi, Ho Seong Jang, Colleen M. McShane, Carrie G. Read in MRS Bulletin (2010)

  13. No Access

    Article

    Electrochemical Synthesis of Lamellar Structured Inorganic Films Using Interfacial Surfactant Templating

    Zinc oxide and cobalt hydroxide films with ordered lamellar structures were electrochemically produced via interfacial surfactant templating. This method utilizes interfacial amphiphile assemblies on a working...

    Kyoung-Shin Choi, M. P. Steinmiller Ellen in MRS Online Proceedings Library (2006)

  14. No Access

    Article

    Structure and Thermoelectric Properties of New Quaternary Tin and Lead Bismuth Selenides, K1+xM4-2xBi7+xSe15 (M = Sn, Pb) and K1+xSn5-xBi11+xSe22

    We present the structure and thermoelectric properties of the new quaternary selenides K1+xM4-2xBi7+xSe15 (M = Sn, Pb) and K1-xSn5-xBi11+xSe22. The compounds K1+xM4-2xBi7+xSe15 (M= Sn, Pb) crystallize isostructur...

    Antje Mrotzek, Kyoung-Shin Choi, Duck-Young Chung in MRS Online Proceedings Library (2000)

  15. No Access

    Article

    Crystal Growth of Ternary and Quaternary Alkali Metal Bismuth Chalcogenides Using Bridgman Technique

    Our exploratory research in new thermoelectric materials has identified the ternary and quaternary bismuth chalcogenides β-K2Bi8Se13, K2.5Bi8.5Se14 and K1+xPb4-2xBi7+xSe15, to have promising properties for thermo...

    Theodora Kyratsi, Duck-Young Chung, Kyoung-Shin Choi in MRS Online Proceedings Library (2000)

  16. No Access

    Article

    Structure and Thermoelectric Properties of SrBiTe3; 12-Fold Superstructure Caused by Distortion of the Two-Dimensional Te-Nets

    The ternary compound, SrBiTe3, was prepared by the molten flux method. It crystallizes in the orthorhombic space group Pmmn with a=4.665(2)Å, b=4.517(2)Å, c=16.129Å, and Z=2. The compound is composed of a NaCl-ty...

    Kyoung-Shin Choi, Duck-Young Chung, Joy Heising in MRS Online Proceedings Library (1998)

  17. No Access

    Article

    Flux Synthesis of New Multinary Bismuth Chalcogenides and their Thermoelectric Properties

    We present the synthesis and structure of the new chalcogenide compounds, Rb0.5 Bi1.83 Te3, APb2 Bi3 Te7 (A = Cs, Rb), K1.25 Pb3.50 Bi7.25 Se15 and A1+x Pb4−2x Sb7+x Se15 (A = K, Rb). The layered structures of th...

    Duck-Young Chung, Kyoung-Shin Choi, Paul W. Brazis in MRS Online Proceedings Library (1998)

  18. No Access

    Article

    Solid State Chemistry Approach to Advanced Thermoelectrics. Ternary and Quaternary Alkali Metal Bismuth Chalcogenides as Thermoelectric Materials

    Our exploratory research to identify new promising candidates for next generation thermoelectric applications has produced several interesting new materials which are briefly described here. We present their c...

    Mercouri G. Kanatzidis, Duck-Young Chung in MRS Online Proceedings Library (1998)