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

Authors

Bong Kang, Sungkyunkwan University
Moo Woo, Sungkyunkwan University
Jooyoung Lee, Sungkyunkwan University
Young Hyun Song, Sungkyunkwan University
Zhongli Wang, National Institute for Materials Science, Japan
Yanna Guo, National Institute For Materials Science, Japan
Yusuke Yamauchi, University of WollongongFollow
Jung Ho Kim, University of WollongongFollow
Byungkwon Lim, Sungkyunkwan University
Dae Yoon, Sungkyunkwan University

RIS ID

112970

Publication Details

Kang, B. Kyun., Woo, M. Hyun., Lee, J., Song, Y., Wang, Z., Guo, Y., Yamauchi, Y., Kim, J., Lim, B. & Yoon, D. Ho. (2017). Mesoporous Ni-Fe oxide multi-composite hollow nanocages for efficient electrocatalytic water oxidation reactions. Journal of Materials Chemistry A, 5 (9), 4320-4324.

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.