3D Graphene Aerogels Decorated with Cobalt Phosphide Nanoparticles as Electrocatalysts for the Hydrogen Evolution Reaction

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• 作者：Xueping Zhang ; Yujie Han ; Liang Huang and Prof. Shaojun Dong
• 刊名：ChemSusChem
• 出版年：2016
• 出版时间：November 9, 2016
• 年：2016
• 卷：9
• 期：21
• 页码：3049-3053
• 全文大小：1381K
• ISSN：1864-564X

文摘

The development of non-precious-metal hydrogen evolution reaction (HER) electrocatalysts with high activity and excellent durability in acidic media is of significant importance for renewable energy research. We report a novel electrocatalyst based on a three-dimensional (3D) graphene aerogel decorated with cobalt phosphide nanoparticles (CoP/GA). The material has a unique hierarchical porous structure with CoP nanoparticles encapsulated uniformly within the graphene sheets. The optimized catalyst shows superior activity, with an overpotential of only 121 mV at 10 mA cm⁻², a Tafel slope of 50 mV dec⁻¹, and an exchange current density of 0.105 mA cm⁻², and it maintains its catalytic activity for at least 13 h. More importantly, this work provides a versatile way for the rational design and fabrication of 3D graphene-based multifunctional composite materials.