Independent Research at POSTECH
42. Phosphorus-Ligand Redox Cooperative Catalysis: Unraveling Four-Electron Dioxygen Reduction Pathways and Reactive Intermediates
Kim, S. G.†; Kim, D.†; Oh, J.†; Son, Y. J.; Jeong, S.; Kim, J.; Hwang, S. J. J. Am. Chem. Soc. 2024, 146, 11440. (Link)
41. Cu-Based Thermoelectrochemical Cells for Direct Conversion of Low-Grade Waste Heat into Electricity
Jung, S.-M.; Kwon, J.; Lee, J.; Shim, K.; Park, D.; Kim, T.; Kim, Y. H.; Hwang, S. J.; Kim, Y.-T. ACS Appl. Energy Mater. 2020, 3, 6383. (Link)
Postdoctoral Research at MIT
40. Enthalpy-Controlled Insertion of a “Nonspectator” Tricoordinate Phosphorus Ligand into Group 10 Transition Metal–Carbon Bonds
Hwang, S. J.; Tanushi, A.; Radosevich, A. T. J. Am. Chem. Soc. 2020, 142, 21285. (Link)
Doctoral Research at Harvard University
39. Photohalogen Elimination Chemistry in Low-valent Binuclear Nickel Complexes
Hwang, S. J.; Hadt, R. G.; Ruccolo, S.; Gygi, D.; Zheng, S.-L.; Chen, Y.-S.; Nocera, D. G. Polyhedron 2021, 203, 115228. (Link) Special issue of Polyhedron as a memorial to Malcolm Green
38. Capturing the Complete Reaction Profile of a C–H Bond Activation
Gygi, D.†; Gonzalez, M. I.†; Hwang, S. J.; Xia, K. T.; Qin, Y.; Johnson, E. J.; Gygi, F.; Chen, Y.-S.; Nocera, D. G. J. Am. Chem. Soc. 2021, 143, 6060. (Link)
37. High-Frequency and -Field EPR (HFEPR) Investigation of a Pseudotetrahedral CrIV Siloxide Complex and Computational Studies of Related CrIVL4 Systems
Bucinsky, L.; Breza, M.; Malček, M.; Powers, D. C.; Hwang, S. J.; Krzystek, J.; Nocera, D. G.; Telser, J. Inorg. Chem. 2019, 58, 4907. (Link)
36. Halogen Photoelimination from Sb(V) Dihalide Corroles
Lemon, C. M.; Hwang, S. J.; Powers, D. C.; Nocera D. G. Inorg. Chem. 2018, 57, 5333. (Link)
35. Scalable Syntheses of 4-substituted Pyridine Diimines
Gygi, D.; Hwang, S. J.; Nocera, D. G. J. Org. Chem. 2017, 82, 12933. (Link)
34. Slow Magnetic Relaxation in Intermediate Spin S=3/2 Mononuclear Fe(III) Complexes
Feng, X.†; Hwang, S. J.†; Liu, J.-L.; Chen, Y.-C.; Tong, M.-L.; Nocera, D. G. J. Am. Chem. Soc. 2017, 139, 16474. (Link)
33. Stereoelectronic Effects in Cl2 Elimination from Binuclear Pt(III) Complexes
Powers, D. C.; Hwang, S. J.; Anderson, B. L.; Yang, H.; Zheng, S.-L.; Chen, Y.-S.; Cook, T. R.; Gabbaï, F. P.;Nocera, D. G. Inorg. Chem. 2016, 55, 11815. (Link)
32. Secondary Coordination Sphere Effects in Halogen Photoelimination from Monomeric Ni(III) Complexes
Hwang, S. J.†; Anderson, B. L.†; Powers, D. C.; Maher, A. G.; Hadt, R. G.; Nocera, D. G. Organometallics, 2015, 34, 4766. (Link)
31. Trap-Free Chlorine Photoelimination from Mononuclear Ni(III) Complexes
Hwang, S. J.; Powers, D. C.; Maher, A. G.; Anderson, B. L.; Hadt, R. G.; Zheng, S.-L.; Chen, Y.-S.; Nocera, D.G. J. Am. Chem. Soc. 2015, 137, 6472. (Link)
30. Tandem Redox Mediator/Ni(II) Trihalide Complex Photocycle for Hydrogen Evolution from HCl
Hwang, S. J.; Powers, D. C.; Maher, A. G.; Nocera, D. G. Chem. Sci. 2015, 6, 917. (Link)
29. Photocrystallographic Observation of Halide-Bridged Intermediates in Halogen Photoeliminations
Powers, D. C.; Anderson, B. L.; Hwang, S. J.; Powers, T. M.; Perez, L. M.; Hall, M. B.; Zheng, S.-L.; Chen, Y.-S.; Nocera, D. G. J. Am. Chem. Soc. 2014, 136, 15346. (Link)
28. Halide-Bridged Binuclear HX-Splitting Catalysts
Powers, D. C.; Hwang, S. J.; Zheng, S.-L.; Nocera, D. G. Inorg. Chem. 2014, 53, 9122. (Link)
Fuel Cell Research at KIST
27. Binaphthyl-based molecular barrier materials for phosphoric acid poisoning in high-temperature proton exchange membrane fuel cells
Jeong, D.-C.; Mun, B.; Lee, H.; Hwang, S. J.; Yoo, S. J.; Cho, E.; Lee, Y.; Song, C. RSC Adv. 2016, 6, 60749. (Link)
26. Analysis on the effect of operating conditions on electrochemical conversion of carbon dioxide to formic acid
Kim, H.-Y.; Choi, I.; Ahn, S. H.; Hwang, S. J.; Yoo, S. J.; Han, J.; Kim, J.; Park, H.; Jang, J. H.; Kim, S.-K. Int. J. Hydrogen Energy. 2014, 39, 16506. (Link)
25. Electrochemically fabricated NiCu alloy catalysts for hydrogen production in alkaline water electrolysis
Anh, S. H.; Park, H.-Y.; Choi, I.; Yoo, S. J.; Hwang, S. J.; Kim, H.-J.; Cho, E.; Yoon, C. W.; Park, H.; Son, H.;Hernandez, J. M.; Nam, S. W.; Lim, T.-H.; Kim, S.-K.; Jang, J. H. Int. J. Hydrogen Energy. 2013, 38, 13493. (Link)
24. Effect of morphology of electrodeposited Ni catalysts on the behavior of bubbles generated during the oxygen evolution reaction in alkaline water electrolysis
Ahn, S. H. Choi, I.; Park, H.-Y.; Hwang, S. J.; Yoo, S. J.; Cho, E.; Kim, H.-J.; Henkensmeier, D.; Nam, S. W.;Kim, S.-K.; Jang, J. H.Chem. Commun. 2013, 49, 9323. (Link)
23. Effect of Particle Size of PtRu Nanoparticles Embedded in WO3 on Electrocatalysis
Yoo, S. J.; Park, H. Y.; Hwang, S. J.; Pyo, S. G.; Kim, S.-K.; Sung, Y.-E.; Lim, T.-H. J. Nanosci. Nanotechnol. 2013, 13, 3591. (Link)
22. Supported Core@Shell Electrocatalysts for Fuel Cells: Close Encounter with Reality
Hwang, S. J.; Yoo, S. J.; Shin, J.; Cho, Y.-H.; Jang, J. H.; Cho, E.; Sung, Y.-E.; Nam, S. W.; Lim, T.-H.; Lee, S.-C.; Kim, S.-K. Sci. Rep. 2013, 3, 1309. (Link)
21. Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid
Park, H.-Y.; Yoo, S. J.; Kim, S. J.; Lee, S.-Y.; Ham, H. C.; Sung, Y.-E.; Kim, S.-K.; Hwang, S. J.; Kim, H.-J.;Cho, E.; Henkensmeier, D.; Nam, S. W.; Lim, T.-H.; Jang, J. H. Electrochem. Commun. 2013, 27, 46. (Link)
20. CIS–ZnS quantum dots for self-aligned liquid crystal molecules with superior electro-optic properties
Lee, W.-K.†; Hwang, S. J.†; Cho, M.-J.; Park, H.-G.; Han, J.-W.; Song, S.; Jang, J. H.; Seo, D.-S. Nanoscale, 2013, 5, 193. (Link)
19. Role of Electronic Perturbation in Stability and Activity of Pt-Based Alloy Nanocatalysts for Oxygen Reduction
Hwang, S. J.; Kim, S.-K.; Lee, J.-G.; Lee, S.-C.; Jang, J. H.; Kim, P.; Lim, T.-H.; Sung, Y.-E.; Yoo, S. J. J. Am. Chem. Soc. 2012, 134, 19508. (Link)
18. Electrodeposited Ni dendrites with high activity and durability for hydrogen evolution reaction in alkaline water electrolysis
Anh, S. H.; Hwang, S. J.; Yoo, S. J.; Choi, I.; Kim, H.-J.; Jang, J. H.; Nam, S. W.; Lim, T.-H.; Lim, T.; Kim, S.-K.; Kim, J. J. J. Mater. Chem. 2012, 22, 15153. (Link)
17. Pt3Y electrocatalyst for oxygen reduction reaction in proton exchange membrane fuel cells
Yoo, S. J.; Lee, K.-S.; Hwang, S. J.; Cho, Y.-H.; Kim. S.-K.; Yun, J. W.; Sung, Y.-E.; Lim, T.-H. Int. J. Hydrogen Energy. 2012, 37, 9758. (Link)
16. Promoting effects of La for improved oxygen reduction activity and high stability of Pt on Pt–La alloy electrodes
Yoo, S. J.; Hwang, S. J.; Lee, J.-G.; Lee, S.-C.; Lim, T.-H.; Sung, Y.-E.; Wieckowski, A.; Kim, S.-K. Energy Environ. Sci. 2012, 5, 7521. (Link)
15. Facile preparation of carbon-supported PtNi hollow nanoparticles with high electrochemical performance
Bae, S. J.; Yoo, S. J.; Lim, Y.; Kim, S.; Lim, Y.; Choi, J.; Nahm, K. S.; Hwang, S. J.; Lim, T.-H.; Kim, S.-K.;Kim, P. J. Mater. Chem. 2012, 22, 8820. (Link)
14. Development of a Galvanostatic Analysis Technique as an In-situ Diagnostic Tool for PEMFC Single Cells and Stacks
Lee, K.-S.; Lee, B.-S.; Yoo, S. J.; Kim, S.-K.; Hwang, S. J.; Kim H.-J.; Cho, E.; Henkensmeier D.; Yun, J. W.;Lim, T.-H.; Jang, J. H. Int. J. Hydrogen Energy. 2012, 37, 5891. (Link)
13. Stabilizer-mediated Synthesis of High Activity PtFe/C Nanocatalysts for Fuel Cell Application
Hwang, S. J.; Kim, J. W.; Yoo, S. J.; Jang, J. H.; Cho, E. A.; Lim, T.-H.; Pyo, S. G.; Kim, S.-K. Bull. Korean Chem. Soc. 2012, 33, 699. (Link)
12. Phosphate adsorption and its effect on oxygen reduction reaction for PtxCoy alloy and Aucore-Ptshell Electrocatalysts
Lee, K.-S.; Yoo, S. J.; Ahn, D.; Kim, S.-K.; Hwang, S. J.; Sung, Y.-E.; Kim, H.-J.; Cho, E.; Henkensmeier, D.; Lim, T.-H.; Jang, J. H. Electrochimica Acta 2011, 56, 8802. (Link)
11. Effects of stabilizers on the synthesis of Pt3Cox/C electrocatalysts for oxygen reduction
Kim, J. W.; Heo, J. H.; Hwang, S. J.; Yoo, S. J.; Jang, J. H.; Ha, J. S.; Jang, S.; Lim, T.-H.; Nam, S. W.; Kim, S.-K. Int. J. Hydrogen Energy. 2011, 36, 12088. (Link)
10. Enhanced stability and activity of Pt–Y alloy catalysts for electrocatalytic oxygen reduction
Yoo, S. J.; Kim, S.-K.; Jeon, T.-Y.; Hwang, S. J.; Cho, Y.-H.; Lee, K.-S.; Sung, Y.-E.; Lim, T.-H. Chem. Commun. 2011, 47, 11414. (Link)
9. Ternary Pt-Fe-Co Alloy Electrocatalysts Prepared by Electrodeposition: Elucidating the Roles of Fe and Co in the Oxygen Reduction Reaction
Hwang, S. J.; Yoo, S. J.; Jang, S.; Lim, T.-H.; Hong, S. A.; Kim, S.-K. J. Phys. Chem. C. 2011, 115, 2483. (Link)
8. Size-controlled synthesis of Pt nanoparticles and their electrochemical activities toward oxygen reduction
Kim, J. W.; Lim, B.; Jang, H.-S.; Hwang, S. J.; Yoo, S. J.; Ha, J. S.; Cho, E. A.; Lim, T.-H.; Nam, S. W.; Kim, S.-K. Int. J. Hydrogen Energy. 2011, 36, 706. (Link)
7. Facile synthesis of highly active and stable Pt-Ir/C electrocatalysts for oxygen reduction and liquid fuel oxidation reaction
Hwang, S. J.; Yoo, S. J.; Jeon, T.-Y.; Lee, K.-S.; Lim, T.-H.; Sung, Y.-E.; Kim, S.-K. Chem. Commun. 2010, 46, 8401. (Link)
6. Fabrication and characterization of high-activity Pt/C electrocatalysts for oxygen reduction
Lim, B.; Kim, J. W.; Hwang, S. J.; Yoo, S. J.; Cho, E. A.; Lim, T.-H.; Kim, S.-K. Bull. Korean Chem. Soc. 2010, 31, 1577. (Link)
Master Research at KAIST
5. Highly efficient and versatile synthesis of polyarylfluorenes via Pd-catalyzed C–H bond activation
Hwang, S. J.; Kim, H. J.; Chang, S. Org. Lett. 2009, 11, 4588. (Link)
4. Synthesis of Condensed Pyrroloindoles via Pd-Catalyzed Intramolecular C–H Bond Functionalization of Pyrroles
Hwang, S. J.; Cho, S. H.; Chang, S. J. Am. Chem. Soc. 2008, 130, 16158. (Link)
3. Palladium-Catalyzed C–H Functionalization of Pyridine N-Oxides: Highly Selective Alkenylation and Direct Arylation with Unactivated Arenes
Cho, S. H.; Hwang, S. J.; Chang, S. J. Am. Chem. Soc. 2008, 130, 9254. (Link)
2. Evaluation of Catalytic Activity of Copper Salts and their Removal Processes in the Three-Component Coupling Reactions
Hwang, S. J.; Cho, S. H.; Chang, S. Pure Appl. Chem. 2008, 80, 873. (Link)
1. Copper-Catalyzed Three-Component Reaction of 1-Alkynes, Sulfonyl Azides, and Water: N-(4-Acetamidophenylsulfonyl)-2-phenylacetamide
Cho, S. H.; Hwang, S. J.; Chang, S. Organic Syntheses 2008, 85, 131. (Link)
† denotes equal contribution