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

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

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

Journal of materials chemistry. A, Materials for energy and sustainability, 2017, Volume: 5, Issue: 9

Journal Article

Mesoporous NiO/NiFe2O4 multi-composite hollow nanocages via monodisperse Ni3Fe(CN)62 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.

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