Energy-Saving Electrolytic Hydrogen Generation: Ni₂P Nanoarray as a High-Performance Non-Noble-Metal Electrocatalyst

详细信息    查看全文

• 作者：Dr. Chun Tang ; Rong Zhang ; Wenbo Lu ; Zao Wang ; Danni Liu ; Shuai Hao ; Prof. Gu Du ; Prof. Abdullah M. Asiri and Prof. Xuping Sun
• 刊名：Angewandte Chemie International Edition
• 出版年：2017
• 出版时间：January 16, 2017
• 年：2017
• 卷：56
• 期：3
• 页码：842-846
• 全文大小：1442K
• ISSN：1521-3773

文摘

It is highly attractive but challenging to develop earth-abundant electrocatalysts for energy-saving electrolytic hydrogen generation. Herein, we report that Ni₂P nanoarrays grown in situ on nickel foam (Ni₂P/NF) behave as a durable high-performance non-noble-metal electrocatalyst for hydrazine oxidation reaction (HzOR) in alkaline media. The replacement of the sluggish anodic oxygen evolution reaction with such the more thermodynamically favorable HzOR enables energy-saving electrochemical hydrogen production with the use of Ni₂P/NF as a bifunctional catalyst for anodic HzOR and cathodic hydrogen evolution reaction. When operated at room temperature, this two-electrode electrolytic system drives 500 mA cm⁻² at a cell voltage as low as 1.0 V with strong long-term electrochemical durability and 100 % Faradaic efficiency for hydrogen evolution in 1.0 m KOH aqueous solution with 0.5 m hydrazine.