Mesoporous Ni-Fe oxide multi-composite hollow nanocages for efficient electrocatalytic water oxidation reactions

Bong Kyun Kang, Moo Hyun Woo, Jooyoung Lee, Young Hyun Song, Zhongli Wang, Yanna Guo, Yusuke Yamauchi, Jung Ho Kim, Byungkwon Lim, Dae Ho Yoon

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Mesoporous NiO/NiFe2O4 multi-composite hollow nanocages via monodisperse Ni3[Fe(CN)6]2 prussian blue analogue nanocube precursors were successfully synthesized. The three-dimensional (3D) mesoporous and hollow structures provided an efficient electrolyte diffusion path and a high surface area, resulting in the enhancement of electrocatalytic activities for the oxygen evolution reaction. The overpotential and Tafel slope of mesoporous NiO/NiFe2O4 multi-composite hollow nanocages were as low as 303 mV at a current density of 10 mA cm-2 and 58.5 mV dec-1, respectively. In addition, the composite showed excellent durability at approximately 60 mA cm-2 for 12 h.

Original languageEnglish
Pages (from-to)4320-4324
Number of pages5
JournalJournal of Materials Chemistry A
Volume5
Issue number9
DOIs
Publication statusPublished - 2017
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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    Kang, B. K., Woo, M. H., Lee, J., Song, Y. H., Wang, Z., Guo, Y., Yamauchi, Y., Kim, J. H., Lim, B., & Yoon, D. H. (2017). Mesoporous Ni-Fe oxide multi-composite hollow nanocages for efficient electrocatalytic water oxidation reactions. Journal of Materials Chemistry A, 5(9), 4320-4324. https://doi.org/10.1039/c6ta10094e