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Designed Formation of Double‐Shelled Ni–Fe Layered‐Double‐Hydroxide Nanocages for Efficient Oxygen Evolution Reaction
Author(s) -
Zhang Jintao,
Yu Le,
Chen Ye,
Lu Xue Feng,
Gao Shuyan,
Lou Xiong Wen David
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201906432
Subject(s) - nanocages , overpotential , hydroxide , oxygen evolution , materials science , layered double hydroxides , electrolyte , chemical engineering , water splitting , oxygen , nanotechnology , inorganic chemistry , catalysis , electrode , chemistry , photocatalysis , electrochemistry , organic chemistry , engineering
Delicate design of nanostructures for oxygen‐evolution electrocatalysts is an important strategy for accelerating the reaction kinetics of water splitting. In this work, Ni–Fe layered‐double‐hydroxide (LDH) nanocages with tunable shells are synthesized via a facile one‐pot self‐templating method. The number of shells can be precisely controlled by regulating the template etching at the interface. Benefiting from the double‐shelled structure with large electroactive surface area and optimized chemical composition, the hierarchical Ni–Fe LDH nanocages exhibit appealing electrocatalytic activity for the oxygen evolution reaction in alkaline electrolyte. Particularly, double‐shelled Ni–Fe LDH nanocages can achieve a current density of 20 mA cm −2 at a low overpotential of 246 mV with excellent stability.