Introducing Fe2+ into Nickel–Iron Layered Double Hydroxide: Local Structure Modulated Water Oxidation Activity

• DOI: 10.1002/ange.201804881
• Publication Date: 2018-06-11T15:53:21Z
• Authors: Zhao Cai; Daojin Zhou; Maoyu Wang; Seong‐Min Bak; Yueshen Wu; Zishan Wu; Yang Tian; Xuya Xiong; Yaping Li; Wen Liu; Samira Siahrostami; Yun Kuang; Xiao‐Qing Yang; Haohong Duan; Zhenxing Feng; Hailiang Wang; Xiaoming Sun
• Keywords: Overpotential; Oxygen evolution; Layered double hydroxides; Reactivity

Abstract Exploring materials with regulated local structures and understanding how the atomic motifs govern reactivity durability of catalysts are a critical challenge for designing advanced catalysts. Herein we report tuning structure nickel–iron layered double hydroxides (NiFe‐LDHs) by partially substituting Ni 2+ Fe to introduce Fe‐O‐Fe moieties. These ‐containing NiFe‐LDHs exhibit enhanced oxygen evolution reaction (OER) activity an ultralow overpotential 195 mV at current density 10 mA cm −2 , which is among best OER catalytic performance date. In‐situ X‐ray absorption, Raman, electrochemical analysis jointly reveal that could stabilize high‐valent metal sites low overpotentials, thereby enhancing activity. results importance high efficiency electrocatalysts.