Cobalt-Nanocrystal-Assembled Hollow Nanoparticles for Electrocatalytic Hydrogen Generation from Neutral-pH Water

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• 作者：Bingrui Liu ; Lin Zhang ; Weilin Xiong and Prof. Dr. Mingming Ma
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：June 1, 2016
• 年：2016
• 卷：55
• 期：23
• 页码：6725-6729
• 全文大小：1158K
• ISSN：1521-3773

文摘

Highly active and stable electrocatalysts for hydrogen generation from neutral-pH water are highly desired, but very difficult to achieve. Herein we report a facile synthetic approach to cobalt nanocrystal assembled hollow nanoparticles (Co-HNP), which serve as an electrocatalyst for hydrogen generation from neutral-pH water. An electrode composed of Co-HNP on a carbon cloth (CC) produces cathodic current densities of 10 and 100 mA cm⁻² at overpotentials of −85 mV and −237 mV, respectively. The Co-HNP/CC electrode retains its high activity after 20 h hydrogen generation at a high current density of 150 mA cm⁻², indicating the superior activity and stability of Co-HNP as electrocatalyst.