Papers | Patents | Google Scholor
 
[2021]

63. Co-catalytic effects of Bi-based metal-organic framework on BiVO4 photoanodes for photoelectrochemical water oxidation

S. Kim, T. A. D. Peña, S. Seo, H. Choi, J. Park, J.-H. Lee, J. Woo, C. H. Choi, and S. Lee*

Applied Surface Science (2021) [Accepted]

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62. Single-atom catalysts – A perspective towards application in electrochemical energy conversion

F. D. Speck,* J. H. Kim, G. Bae, S. H. Joo, K. J. J. Mayrhofer, C. H. Choi,* and S. Cherevko*

JACS Au (2021) [Accepted]

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61. Real-time monitoring of electrochemical carbon corrosion in alkaline media

S. G. Ji, H. Kim, W. H. Lee, H.-S. Oh, and C. H. Choi*

Journal of Materials Chemistry A (2021) [Accepted]

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60. High crystallinity design of Ir-based catalysts drives catalytic reversibility for water electrolysis and fuel cells

W. H. Lee, Y.-J. Ko, J. H. Kim, C. H. Choi, K. H. Chae, H. Kim, Y. J. Hwang, B. K. Min, P. Strasser,* and H.-S. Oh*

Nature Communications (2021) [Accepted]

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59. Quantification of active site density and turnover frequency: from single-atom metal to nanoparticle electrocatalysts

G. Bae,† H. Kim,† H. Choi, P. Jeong, D. H. Kim, H. C. Kwon, K.-S. Lee, M. Choi, H.-S. Oh, F. Jaouen,* and C. H. Choi*

JACS Au 1 (2021) 586 [Link]

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58. Bendable BiVO4-based photoanodes on a metal substrate realized through template engineering for photoelectrochemical water splitting

J. Lee†, S. Lee†, S. Seo, S. Kim, J. Lee, J. Song, J. Yang, Y. Jung, J.-H. Lee, R.-K. Ko, H. Choi, C. H. Choi and S. Lee*

ACS Applied Materials & Interfaces 13 (2021) 16478 [Link]

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57. Selective electrochemical reduction of nitric oxide to hydroxylamine by atomically dispersed iron catalyst

D. H. Kim†, S. Ringe†, H. Kim, S. Kim, B. Kim, G. Bae, H.-S. Oh, F. Jaouen, W. Kim,* H. Kim* and C. H. Choi*

Nature Communications 12 (2021) 1856 [Link]

Introduced in 'KBS' News [Link]

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56. Pyrolyzed M–Nx catalysts for oxygen reduction reaction: progress and prospects

E. Luo, Y. Chu, J. Liu, Z. Shi, S. Zhu, L. Gong, J. Ge,* C. H. Choi,* C. Liu* and W. Xing*

Energy & Enviromental Science 14 (2021) 2158 [Link]

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55. Highly selective and stackable electrode design for gaseous CO2 electroreduction to ethylene in a zero-gap configuration

W. H. Lee, C. W. Lim, S. Y. Lee, K. H. Chae, C. H. Choi, U. Lee, B. K. Min, Y. J. Hwang* and H.-S. Oh*

Nano Energy 84 (2021) 105859 [Link]

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54. Identification of single-atom Ni site active toward electrochemical CO2 conversion to CO

H. Kim†, D. Shin†, W. Yang†, D. H. Won†, H.-S. Oh, M. W. Chung, D. Jeong, S. H. Kim, K. H. Chae, J. Y. Ryu, J. Lee, S. J. Cho, J. Seo,* H, Kim* and C. H. Choi*

Journal of the American Chemical Society 143 (2021) 925 [Link]

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[2020]

(Book Chapter) Bridging homogeneous and heterogeneous systems: Atomically dispersed metal atoms in carbon matrices for electrocatalytic CO2 reduction

H.-Y. Jeong, M. Balamurugan, C. H. Choi and K. T. Nam

Carbon Dioxide Electrochemistry: Homogeneous and Heterogeneous Catalysis Chapter 6 [Link]

53. Boosting the role of Ir in mitigating corrosion of carbon support by alloying with Pt

J. Bak, H. Kim, S. J. Lee, M. Kim, E.-J. Kim, J. Roh, J. Shin, C. H. Choi and E. Cho*

ACS Catalysis 10 (2020) 12300 [Link]

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52. Operando stability of platinum electrocatalysts in ammonia oxidation reactions

H. Kim, W. Yang, W. H. Lee, M. H. Han, J. Moon, C. Jeon, D. Kim, S. G. Ji, K. H. Chae, K.-S. Lee, J. Seo, H.-S. Oh, H. Kim and C. H. Choi*

ACS Catalysis 10 (2020) 11674 [Link]

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51. Underestimation of platinum electrocatalysis induced by carbon monoxide evolved from graphite counter electrode

S. G. Ji, H. Kim, C. Park, W. Kim and C. H. Choi*

ACS Catalysis 10 (2020) 10773 [Link]

Introduced at 'Research Highlights' of Nature Catalysis [Link]

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50. Oxygen-vacancies induced NiFe-hydroxide as a scalable, efficient, and stable electrode for alkaline overall water splitting

W. H. Lee, M. H. Han, U. Lee, K. H. Chae, H. Kim, Y. J. Hwang, B. K. Min, C. H. Choi* and H.-S. Oh*

ACS Sustainable Chemistry & Engineering 8 (2020) 14071 [Link]

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49. Atomistic insights into the stability of Pt single atom electrocatalysts

F. D. Speck,† M. T. Y. Paul,†* F. Ruiz-Zepeda, M. Gatalo, H. Kim, H. C. Kwon, K. J. J. Mayrhofer, M. Choi, C. H. Choi, N. Hodnik and S. Cherevko*

Journal of the American Chemical Society 142 (2020) 15496 [Link]

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48. pH effect on the H2O2-induced deactivation of Fe-N-C catalysts

G. Bae†, M. W. Chung†, S. G. Ji, F. Jaouen* and C. H. Choi*

ACS Catalysis 10 (2020) 8485 [Link]

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47. Highly selective and scalable CO2 to CO-electrolysis using coral-nanostructured Ag catalysts in zero-gap configuration

W. H. Lee, Y.-J. Ko, Y. Choi, S. Y. Lee, C. H. Choi, Y. J. Hwang, B. K. Min, P. Strasser* and H.-S. Oh*

Nano Energy 76 (2020) 105030 [Link]

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46. Carbon-supported IrCoOx nanoparticles as an efficient and stable OER electrocatalyst for practicable CO2 electrolysis

W. H. Lee, H. N. Nong, C. H. Choi, K. H. Chae, Y. J. Hwang, B. K. Min, P. Strasser* and H.-S. Oh*

Applied Catalysis B-Environmental 269 (2020) 118820 [Link]

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45. Overestimation of photoelectrochemical hydrogen evolution reactivity induced by noble metal impurities dissolved from counter/reference electrodes

S. G. Ji, H. Kim, H. Choi, S. Lee* and C. H. Choi*

ACS Catalysis 10 (2020) 3381-3389 [Link]

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[2019]

 

44. Theoretical and experimental understanding of hydrogen evolution reaction kinetics in alkaline electrolytes with Pt-based core-shell nanocrystal

J. Kim†, H. Kim†, W.-J. Lee, B. Ruqia, H. Baik, H.-S. Oh, S.-M. Paek, H.-K. Lim,* C. H. Choi* and S.-I. Choi*

Journal of the American Chemical Society 141 (2019) 18256-18263 [Link]

Selected for the virtual issue of JACS Young Investigators 2020 [Link

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43. Turning harmful deposition of metal impurities into activation of nitrogen-doped carbon catalyst toward durable electrochemical CO2 reduction

C. Kim, Y.-K. Choe, D. H. Won, U. Lee, H.-S. Oh, D. K. Lee, C. H. Choi, S. Yoon, W. Kim, Y. J. Hwang* and B. K. Min*

ACS Energy Letters 4 (2019) 2343-2350 [Link]

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41. Effect of Pt introduced on Ru-based electrocatalyst for oxygen evolution activity and stability

J. Yi†, W. H. Lee†, C. H. Choi, Y. Lee, K. S. Park, B. K. Kim, Y. J. Hwang* and H.-S. Oh*

Electrochemistry Communications 104 (2019) 106469 [Link]

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42. Catalytic surface specificity of Ni(OH)₂ decorated Pt nanocubes for the hydrogen evolution reaction in an alkaline electrolyte

Y. Hong, C. H. Choi and S.-I. Choi*

ChemSusChem 12 (2019) 4021-4028 [Link]

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40. Selective H2O2 production on surface-oxidized metal-nitrogen-carbon electrocatalysts

M. Suk†, M. W. Chung†, M. H. Han, H.-S. Oh* and C. H. Choi*

Catalysis Today 359 (2021) 99-105 [Link]

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39. Accurate evaluation of active site density (SD) and turnover frequency (TOF) of PGM-free metal-nitrogen-doped carbon (MNC) electrocatalysts using CO cryo adsorption

F. Luo, C. H. Choi, M. J. M. Primbs, W. Ju, L. Shuang, N. D. Leonard, A. Thomas, F. Jaouen* and P. Strasser*

ACS Catalysis 9 (2019) 4841-4852 [Link]

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38. Deactivation of Fe-N-C catalysts during catalyst ink preparation process

G. Chon†, M. Suk†, F. Jaouen, M. W. Chung* and  C. H. Choi*

Catalysis Today 359 (2021) 9-15 [Link]

 

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[2018]

 

37. Carbon monoxide as a promoter of atomically dispersed platinum catalyst in electrochemical hydrogen evolution reaction

H. C. Kwon, M. Kim, J.-P. Grote, S. J. Cho, M. W. Chung, H. Kim, D. H. Won, A. R. Zeradjanin, K. J. J. Mayrhofer, M. Choi, H. Kim* and C. H. Choi*

Journal of the American Chemical Society 140 (2018) 16198-16205 [Link]

 

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36. Achilles' heel of iron-based catalysts during oxygen reduction in acidic medium

C. H. Choi,* H. Lim, M. W. Chung, G. Chon. N. R. Sahraie, A. Altin, M.-T. Sourgrati, L. Stievano, H. S. Oh, E. S. Park, F. Luo, P. Strasser, G. Drazic, K. J. J. Mayrhofer, H. Kim* and F. Jaouen*

Energy & Environmental Science 11 (2018) 3176-3182 [Link (ChemRxiv)]

Introduced at 'Research Highlights' of Nature Catalysis [Link]

 

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35. NOx-induced deactivation of Pt electrocatalysis towards the ammonia oxidation reaction

H. Kim, M. W. Chung and C. H. Choi*

Electrochemistry Communications 94 (2018) 31-35. [Link]

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34. Electrochemical evidence for two sub-families of FeNxCy moieties with concentration-dependent cyanide poisoning

M. W. Chung, G. Chon, H. Kim, F. Jaouen* and C. H. Choi*

ChemElectroChem 5 (2018) 1880-1885. [Link]

 
[2017]

33. Unraveling the nature of sites active toward hydrogen peroxide reduction in Fe-N-C catalysts

C. H. Choi,* W. S. Choi, O. Kasian, A. K. Mechler, M. Sougrati, S. Brüller, K. Strickland, Q. Jia, S. Mukerjee, K. J. J. Mayrhofer, and F Jaouen*

Angewandte Chemie International Edition 56 (2017) 8809-8812. [Link]

32. Graphene-derived Fe/Co-N-C catalyst in direct methanol fuel cells: Effects of the methanol concentration and ionomer content on cell performance

J. C. Park and C. H. Choi*

Journal of Power Sources 358 (2017) 76-84. [Link]

31. Carbon nanofibers as parent materials for a graphene-based Fe-N-C catalyst for the oxygen reduction reaction

M. W. Chung and C. H. Choi*

Catalysis Today 295 (2017) 125-131. [Link]

30. Electrocatalytic synthesis of hydrogen peroxide on Au-Pd nanoparticles: from fundamentals to continuous production

E. Pizzutilo,* O. Kasian, C. H. Choi, S. Cherevko, G. J. Hutchings, K. J. J. Mayrhofer, and S. J. Freakley*

Chemical Physics Letters 683 (2017) 436-442. [Link]

29. Fluorophore metal–organic complexes: High-throughput optical screening for aprotic electrochemical systems

S. H. Park, C. H. Choi, S. Y. Lee, and S. I. Woo*

ACS Combinatorial Science 19 (2017) 81-84. [Link]

 
[2016]

28. Dimensional tailoring of nitrogen-doped graphene for high-performing supercapacitors

S. Y. Lee, C. H. Choi, M. W. Chung, J. H. Chung, and S. I. Woo*

RSC Advances 6 (2016) 55577-55583. [Link]

 

27. Minimizing operando demetallation of Fe-N-C electrocatalysts in acidic medium

C. H. Choi,* C. Baldizzone, G. Polymeros, E. Pizzutilo, O. Kasian, A. K. Schuppert, N. R. Sahraie, M.-T. Sougrati, K. J. J. Mayrhofer,*
and F. Jaouen* 

ACS Catalysis 6 (2016) 3136-3146. [Link]

 

26. Tuning selectivity of electrochemical reactions by atomically dispersed platinum catalyst

C. H. Choi, M. Kim, H. C. Kwon, S. J. Cho, S. Yun, H. Kim, K. J. J. Mayrhofer, H. Kim*, and M. Choi*

Nature Communications 7 (2016) 10922. [Link]

[2015]

 

25. Stability of Fe-N-C catalysts in acidic medium studied by operando spectroscopy

C. H. Choi,* C. Baldizzone, J.-P. Grote, A. K. Schuppert, F. Jaouen*, and K. J. J. Mayrhofer*

Angewandte Chemie International Edition 54 (2015) 12753-12757. [Link]

 

24. Rational design of a hierarchical tin dendrite electrode for efficient electrochemical reduction of CO2

D. H. Won†,  C. H. Choi†,  J. Chung, M. W. Chung, E. -H. Kim, and S. I. Woo*

ChemSusChem 8 (2015) 3092-3098. [Link]

 

23. Optimization of catalyst layer composition for PEMFC using graphene-based oxygen reduction reaction catalysts

J. C. Park, S. H. Park, M. W. Chung, C. H. Choi, B. K. Kho, and S. I. Woo*

Journal of Power Sources 286 (2015) 166-174. [Link]

 

22. Aerosol-assisted controlled packing of silica nanocolloids: templateless synthesis of mesoporous silicates with structural tunability and complexity

K. Min, C. H. Choi, M. Y. Kim, and M. Choi*

Langmuir 31 (2015) 542-550. [Link]

 

21.Dimensionality-dependent oxygen reduction reaction activity on doped graphene: Is graphene a promising substrate for electrocatalysis?

M. W. Chung†, C. H. Choi†, S. Y. Lee, and S. I. Woo*

Nano Energy 11 (2015) 526-532. [Link]

[2014]

 

20. Hydrogen peroxide synthesis via enhanced two-electron oxygen reduction pathway on carbon-coated Pt surface

C. H. Choi, H. C. Kwon, S. Yook, H. Shin, H. Kim, and M. Choi*

 The Journal of  Physical Chemistry C 118 (2014) 30063-30070. [Link]

 

19. Long-range electron transfer over graphene-based catalyst for high performing oxygen reduction reactions: importance of size, N-doping, and metallic impurities

C. H. Choi†, H. K. Lim†, M. W. Chung, J. C. Park, H. Shin, H. Kim,* and S. I. Woo*

Journal of the American Chemical Society 136 (2014) 9070-9077. [Link]

 

18. Photoelectrochemical production of formic acid and methanol from carbon dioxide on metal decorated CuO/Cu2O layered thin films under visible light irradiation

D. H. Won†, C. H. Choi†, J. Chung, and S. I. Woo*

Applied Catalysis B: Environmental 158-159 (2014) 217-223. [Link]

 

17. Synergism between CdTe semiconductor and pyridine-photoenhanced electrocatalysis for CO2 reduction to formic acid

J. H. Jeon, P. M. Mareeswaran, C. H. Choi, and S. I. Woo*

RSC Advances 4 (2014) 3016-3019. [Link]

 

16. Nitrogen-doped graphene/carbon nanotube self-assembly for efficient oxygen reduction reaction in acid media

C. H. Choi, M. W. Chung, H. C. Kwon, J. H. Chung, and S. I. Woo*

Applied Catalysis B: Environmental 144 (2014) 760-766. [Link]

[2013]

 

15. Combinatorial high-throughput screening for highly active Pd-Ir-Ce based ternary catalysts in electrochemical oxygen reduction reaction

S. H. Park, C. H. Choi, J. K. Koh, C. Pak, S. Jin, and S. I. Woo*

ACS Combinatorial Science 15 (2013) 572–579. [Link]

 

14. Doping of chalcogens (Sulfur and/or Selenium) in nitrogen-doped graphene/CNT self-assembly for enhanced oxygen reduction activity in acid media

C. H. Choi, M. W. Chung, Y. J. Jun, and S. I. Woo*

RSC Advances 3 (2013) 12417-12422. [Link]

13. Designed synthesis of well-defined Pd@Pt core–shell nanoparticles with controlled shell thickness as efficient oxygen reduction electrocatalysts

R. Choi, S.-I. Choi, C. H. Choi, K. M. Nam, S. I. Woo, J. T. Park, S. W. Han*

Chemistry-A European Journal 19 (2013) 8190-8198. [Link]

 

12. B, N- and P, N-doped graphene as highly active catalysts for oxygen reduction reactions in acidic media

C. H. Choi, M. W. Chung, H. C. Kwon, S. H. Park, and S. I. Woo*

Journal of Materials Chemistry A 1 (2013) 3694-3699. [Link]

 

11. Enhanced electrochemical oxygen reduction reaction by restacking of N-doped single graphene layers

C. H. Choi, M. W. Chung, S. H. Park, and S. I. Woo*

RSC Advances 3 (2013) 4246-4253. [Link]

 

10. Enhanced hydrogen generation from methanol aqueous solutions over Pt/MoO3/TiO2 under ultraviolet light

B. J. Ma, J. S. Kim, C. H. Choi, and S. I. Woo*

International Journal of Hydrogen Energy 38 (2013) 3582-3587. [Link]

 

9. Additional doping of phosphorus and/or sulfur into nitrogen-doped carbon for efficient oxygen reduction reaction in acid media

C. H. Choi, M. W. Chung, S. H. Park, and S. I. Woo*

Physical Chemistry Chemical Physics 15 (2013) 1802-1805. [Link]

 

8. Easy and controlled synthesis of nitrogen-doped carbon

C. H. Choi, S. H. Park, M. W. Chung, and S. I. Woo*

Carbon 55 (2013) 98-107. [Link]

[2012]

 

7. Binary and ternary doping of nitrogen, boron, and phosphorus into carbon for enhancing electrochemical oxygen reduction activity

C. H. Choi, S. H. Park, and S. I. Woo*

ACS Nano 6 (2012) 7084–7091. [Link]

6. Phosphorus-nitrogen dual doped carbon as an effective catalyst for oxygen reduction reaction in acidic media: Effects of the amount of P-doping on the physical and electrochemical properties of carbon

C. H. Choi, S. H. Park, and S. I. Woo*

Journal of Materials Chemistry 22 (2012) 12107-12115. [Link]

5. Oxygen reduction activity of Pd-Mn3O4 nanoparticles and performance enhancement by voltammetrically accelerated degradation

C. H. Choi, S. H. Park, and S. I. Woo*

Physical Chemistry Chemical Physics 14(19) (2012) 6842-6848. [Link]

 

4. N-doped carbon prepared by pyrolysis of dicyandiamide with various MeCl2-xH2O (M=Co, Fe, and Ni) composites: effect of type and amount of metal seed on oxygen reduction reactions

C. H. Choi, S. H. Park, and S. I. Woo*

Applied Catalysis B: Environmental 119-120 (2012) 123-131. [Link]

 

3. Facile growth of N-doped CNTs on Vulcan carbon and the effects of iron content on electrochemical activity for oxygen reduction reaction

C. H. Choi, S. H. Park, and S. I. Woo*

International Journal of Hydrogen Energy 37 (2012) 4563-4570. [Link]

[2011]

 

2. Highly active N-doped-CNTs grafted on Fe/C prepared by pyrolysis of dicyandiamide on Fe2O3/C for electrochemical oxygen reduction reaction

C. H. Choi, S. Y. Lee, S. H. Park, and S. I. Woo*

Applied Catalysis B: Environmental 103 (2011) 362–368. [Link]

1. Heteroatom doped carbons prepared by the pyrolysis of bio-derived amino acids as highly active catalysts for oxygen electro-reduction reactions

C. H. Choi, S. H. Park, and S. I. Woo*

Green Chemistry 13 (2011) 406-412. [Link]