High-Performance Electrolytic Oxygen Evolution in Neutral Media Catalyzed by a Cobalt Phosphate Nanoarray

详细信息    查看全文

• 作者：Lisi Xie ; Rong Zhang ; Liang Cui ; Danni Liu ; Shuai Hao ; Prof. Yongjun Ma ; Prof. Gu Du ; Prof. Abdullah M. Asiri and Prof. Xuping Sun
• 刊名：Angewandte Chemie
• 出版年：2017
• 出版时间：January 19, 2017
• 年：2017
• 卷：129
• 期：4
• 页码：1084-1088
• 全文大小：1342K
• ISSN：1521-3757

文摘

The topotactic conversion of cobalt phosphide nanoarray on Ti mesh into a cobalt phosphate nanoarray (Co-Pi NA) via oxidative polarization in phosphate-buffered water is presented. As a 3D oxygen evolution reaction (OER) catalyst electrode at neutral pH, the resulting Co-Pi NA/Ti shows exceptionally high catalytic activity and demands an overpotential of only 450 mV to drive a geometrical catalytic current density of 10 mA cm⁻². Notably, this catalyst also shows superior long-term electrochemical stability. The excellent catalytic activity can be attributed to that such 3D nanoarray configuration allows for the exposure of more active sites and the easier diffusion of electrolytes and oxygen.