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Self‐Templating Synthesis of Hollow Co 3 O 4 Microtube Arrays for Highly Efficient Water Electrolysis
Author(s) -
Zhu Yun Pei,
Ma Tian Yi,
Jaroniec Mietek,
Qiao Shi Zhang
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201610413
Subject(s) - bifunctional , water splitting , materials science , nanotechnology , oxygen evolution , electrode , fabrication , electrochemistry , electron transfer , nanostructure , electrolysis of water , electrolysis , noble metal , porosity , transition metal , chemical engineering , metal , catalysis , chemistry , electrolyte , alternative medicine , pathology , engineering , composite material , biochemistry , photocatalysis , metallurgy , medicine , organic chemistry
Abstract In spite of recent advances in the synthesis of hollow micro/nanostructures, the fabrication of three‐dimensional electrodes on the basis of these structures remains a major challenge. Herein, we develop an electrochemical sacrificial‐template strategy to fabricate hollow Co 3 O 4 microtube arrays with hierarchical porosity. The resultant unique structures and integrated electrode configurations impart enhanced mass transfer and electron mobility, ensuring high activity and stability in catalyzing oxygen and hydrogen evolution reactions. Impressively, the apparent performance can rival that of state‐of‐the‐art noble‐metal and transition‐metal electrocatalysts. Furthermore, this bifunctional electrode can be used for highly efficient overall water splitting, even competing with the integrated performance of Pt/C and IrO 2 /C.