화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.102, 155-162, October, 2021
DOI10.1016/j.jiec.2021.07.004  Export Citation
Ir0.11Fe0.25O0.64 as a highly efficient electrode for electrochlorination in dilute chloride solutions
Seongsoo Kim1, Teayoung Lee1, Sanghwi Han1, Changha Lee1, Choonsoo Kim2, †, and Jeyong Yoon1, 3, †
  • 1A School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Processes, Seoul National University (SNU), Gwanak-gu, Daehak-dong, Seoul, Republic of Korea
  • 2Department of Environmental Engineering and Institute of Energy/Environment Convergence Technologies, Kongju National University, 1223-24, Cheonan-daero, Cheonan-si 31080, Republic of Korea
  • 3Korea Environment Institute, 370 Sicheong-daero, Sejong 30147, Republic of Korea
E-mail:,
Dimensionally stable anodes (DSAs) are regarded to be optimized electrodes for electrochlorination owing to their excellent electrocatalytic activity for the chlorine evolution reaction (CER). However, in dilute chloride solutions, DSAs preferentially produce oxygen rather than chlorine because of their low overpotential for oxygen evolution reaction (OER). Considering the frequent use of electrochlorination in dilute conditions, the poor efficiency of DSAs severely limits their environmental and industrial applications. Therefore, the aim of this study is to improve the CER efficiency of IrO2 in dilute chloride solutions with the addition of Fe2O3 as a co-catalyst which has a slow reaction rate of OER. In a dilute chloride solution of 1 mM NaCl, Ir0.11Fe0.25O0.64 showed a far higher current efficiency for CER (28%) than that of IrO2 (3%). Ir0.11Fe0.25O0.64 also exhibited better current efficiency in NaCl solution of various concentrations (1 mM to 2 M) than that of IrO2. This is attributed to the synergistic effect of Fe2O3 (slow OER rate) and IrO2 (fast CER rate). Moreover, the long-term stability of Ir0.11Fe0.25O0.64 was demonstrated with tap water electrolysis for 50 days. These results suggest that Ir0.11Fe0.25O0.64 has great potential to expand the scope of application of the electrochlorination system, particularly in dilute solutions.
Keywords:Electrochlorination;Chlorine evolution reaction;IrO2;Fe2O3;Volcano curve
  1. Kraft A, Stadelmann M, Blaschke M, Kreysig D, Sandt B, Schroder F, Rennau J, J. Appl. Electrochem., 29, 859 (1999)
  2. Patermarakis G, Fountoukidis E, Water Res., 24, 1491 (1990)
  3. Jeong J, Kim JY, Cho M, Choi W, Yoon J, Chemosphere, 67, 652 (2007)
  4. Choi J, Shim S, Yoon J, J. Ind. Eng. Chem., 19(1), 215 (2013)
  5. Saha J, Gupta SK, Chem. Eng. Commun., 204(12), 1357 (2017)
  6. Nath H, Wang XJ, Torrens R, Langdon A, J. Appl. Electrochem., 41(4), 389 (2011)
  7. Cotillas S, Llanos J, Rodrigo MA, Canizares P, Appl. Catal. B: Environ., 162, 252 (2015)
  8. Luu TL, Kim J, Yoon J, J. Ind. Eng. Chem., 21, 400 (2015)
  9. Khelifa A, Aoudj S, Mallay S, De Petris-Weryd M, Chem. Eng. Process., 70, 110 (2013)
  10. Saha J, Gupta SK, Ionics, 23, 1903 (2017)
  11. Trasatti S, Electrochim. Acta, 45(15-16), 2377 (2000)
  12. Malpass G, Miwa D, Mortari D, Machado S, Motheo A, Water Res., 41, 2969 (2007)
  13. Menzel N, Ortel E, Mette K, Kraehnert R, Strasser P, ACS Catal., 3, 1324 (2013)
  14. Exner KS, Anton J, Jacob T, Over H, Angew. Chem.-Int. Edit., 126, 11212 (2014)
  15. Exner KS, PCCP, 22451 (2020).
  16. Vos JG, Wezendonk TA, Jeremiasse AW, Koper MTM, J. Am. Chem. Soc., 140(32), 10270 (2018)
  17. Exner KS, ChemElectroChem, 6, 3401 (2019)
  18. Vos JG, Liu Z, Speck FD, Perini N, Fu W, Cherevko S, Koper MT, ACS Catalysis, 9, 8561 (2019)
  19. Grgur BN, Mijin DZ, Appl. Catal. B: Environ., 147, 429 (2014)
  20. Neodo S, Rosestolato D, Ferro S, De Battisti A, Electrochim. Acta, 80, 282 (2012)
  21. Oakton E, Lebedev D, Povia M, Abbott DF, Fabbri E, Fedorov A, Nachtegaal M, Coperet C, Schmidt TJ, ACS Catalysis, 7, 2346 (2017)
  22. Tavakkoli M, Kallio T, Reynaud O, Nasibulin AG, Sainio J, Jiang H, Kauppinen EI, Laasonen K, J. Mater. Chem. A, 4, 5216 (2016)
  23. Khelifa A, Moulay S, Hannane F, Benslimene S, Hecini M, Desalination, 160(1), 91 (2004)
  24. Mendia L, Water Sci. Technol., 14, 331 (1982)
  25. Hooper J, in ON-SITE GENERATION OF SODIUM HYPOCHLORITE BASIC OPERATING PRINCIPLES AND DESIGN CONSIDERATIONS, pp. 59-66, (2005).
  26. Yang TY, Kang HY, Jin K, Park S, Lee JH, Sim U, Jeong HY, Joo YC, Nam KT, J. Mater. Chem. A, 2, 2297 (2014)
  27. Rahman G, Joo OS, Int. J. Hydrog. Energy, 37(19), 13989 (2012)
  28. Fu Z, Jiang T, zhang L, Liu B, Wang D, Wang l, Xie T, J. Mater. Chem. A, 2, 13705 (2014)
  29. Spray RL, McDonald KJ, Choi KS, J. Phys. Chem. C, 115, 3497 (2011)
  30. Carroll GM, Gamelin DR, J. Mater. Chem. A, 4, 2986 (2016)
  31. Sivula K, Le Formal F, Gratzel M, ChemSusChem, 4, 432 (2011)
  32. Zeng Q, Bai J, Li J, Xia L, Huang K, Li X, Zhou B, J. Mater. Chem. A, 3, 4345 (2015)
  33. Cong YQ, Chen MM, Xu T, Zhang Y, Wang Q, Appl. Catal. B: Environ., 147, 733 (2014)
  34. Tamirat AG, Su WN, Dubale AA, Chen HM, Hwang BJ, J. Mater. Chem. A, 3, 5949 (2015)
  35. Trasatti S, Electrochim. Acta, 29, 1503 (1984)
  36. Sohrabnejad-Eskan I, Goryachev A, Exner KS, Kibler LA, Hensen EJ, Hofmann JP, Over H, ACS Catal., 7, 2403 (2017)
  37. Kupovich F, Virnik A, Russ. J. Electrochem., 37, 907 (2001)
  38. Chung CM, Lee W, Hong SW, Cho K, J. Electrochem. Soc., 166(13), H628 (2019)
  39. Hu J, Xu H, Feng X, Lei L, He Y, Zhang X, ChemElectroChem, 8, 1204 (2021)
  40. Hu JM, Zhang JQ, Cao CN, Int. J. Hydrog. Energy, 29(8), 791 (2004)
  41. Defaria LA, Boodts JF, Trasatti S, J. Appl. Electrochem., 26(11), 1195 (1996)
  42. Da Silva LM, Boodts JFC, De Faria LA, Electrochim. Acta, 46(9), 1369 (2001)
  43. Zeradjanin AR, Menzel N, Strasser P, Schuhmann W, ChemSusChem, 5, 1897 (2012)