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Topotactic Consolidation of Monocrystalline CoZn Hydroxides for Advanced Oxygen Evolution Electrodes
Author(s) -
Wang Jing,
Tan Chuan Fu,
Zhu Ting,
Ho Ghim Wei
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201605096
Subject(s) - monocrystalline silicon , nanosheet , materials science , cobalt hydroxide , oxygen evolution , hydroxide , cobalt , chemical engineering , nanotechnology , electrode , catalysis , electrochemistry , inorganic chemistry , chemistry , metallurgy , silicon , organic chemistry , engineering
We present a room temperature topotactic consolidation of cobalt and zinc constituents into monocrystalline CoZn hydroxide nanosheets, by a localized corrosion of zinc foils with cobalt precursors. By virtue of similar lattice orientation and structure coordination, the hybrid hydroxides amalgamate atomically without phase separation. Importantly, this in situ growth strategy, in combination with configurable percolated nanosheets, renders a high areal density of catalytic sites, immobilized structures, and conductive pathways between the nanosheets and underlying foils—all of which allow monocrystalline CoZn hydroxide nanosheet materials to function as effective electrodes for electrochemical oxygen evolution reactions. This convenient and eco‐friendly topotactical transformation approach facilitates high‐quality single crystal growth with improved multiphase purity and homogeneity, which can be extended to other transition metals for the fabrication of advanced functional nanocomposites.