Self-Templating Synthesis of Hollow Co<sub>3sub>O<sub>4sub> Microtube Arrays for Highly Efficient Water Electrolysis

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• 作者：Dr. Yun Pei Zhu ; Dr. Tian Yi Ma ; Prof. Mietek Jaroniec and Prof. Shi Zhang Qiao
• 刊名：Angewandte Chemie International Edition
• 出版年：2017
• 出版时间：January 24, 2017
• 年：2017
• 卷：56
• 期：5
• 页码：1324-1328
• 全文大小：2647K
• ISSN：1521-3773

文摘

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<sub>3sub>O<sub>4sub> 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<sub>2sub>/C.