Efficient Overall Water-Splitting Electrocatalysis Using Lepidocrocite VOOH Hollow Nanospheres

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• 作者：Huanhuan Shi ; Dr. Hanfeng Liang ; Fangwang Ming and Prof. Zhoucheng Wang
• 刊名：Angewandte Chemie
• 出版年：2017
• 出版时间：January 9, 2017
• 年：2017
• 卷：129
• 期：2
• 页码：588-592
• 全文大小：1891K
• ISSN：1521-3757

文摘

Herein we report the control synthesis of lepidocrocite VOOH hollow nanospheres and further their applications in electrocatalytic water splitting for the first time. By tuning the surface area of the nanospheres, the optimal performance can be achieved with low overpotentials of 270 mV for the oxygen evolution reaction (OER) and 164 mV for the hydrogen evolution reaction (HER) at 10 mA cm⁻² in 1 m KOH, respectively. Furthermore, when used as both the anode and cathode for overall water splitting, a low cell voltage of 1.62 V is required to reach the current density of 10 mA cm⁻², making the VOOH hollow nanospheres an efficient alternative to water splitting.